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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
36static 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
80static 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
179static 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
240static 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
260static 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
279static 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
313static 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
347struct node_hash {
348 struct hlist_node node;
349 struct device_node *np;
350};
351
352static DEFINE_HASHTABLE(phandle_ht, 8);
353static 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
391static 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
550static 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
704static 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))
789static 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
806static 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
920static 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
936static 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
966static 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
982static 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
1012static 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
1019static 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
1075end_revert_changeset:
1076 ret = of_changeset_revert(&chgset);
1077 unittest(ret == 0, "failed to revert changeset\n");
1078
1079end_changeset_destroy:
1080 of_changeset_destroy(&chgset);
1081 of_node_put(nchangeset);
1082#endif
1083}
1084
1085static 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
1105static 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
1153static 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
1164static 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
1216static void __init of_unittest_pci_empty_dma_ranges(void)
1217{
1218 struct device_node *np;
1219 struct of_pci_range range;
1220 struct of_pci_range_parser parser;
1221
1222 if (!IS_ENABLED(CONFIG_PCI))
1223 return;
1224
1225 np = of_find_node_by_path("/testcase-data/address-tests2/pcie@d1070000/pci@0,0/dev@0,0/local-bus@0");
1226 if (!np) {
1227 pr_err("missing testcase data\n");
1228 return;
1229 }
1230
1231 if (of_pci_dma_range_parser_init(&parser, np)) {
1232 pr_err("missing dma-ranges property\n");
1233 return;
1234 }
1235
1236 /*
1237 * Get the dma-ranges from the device tree
1238 */
1239 for_each_of_pci_range(&parser, &range) {
1240 unittest(range.size == 0x10000000,
1241 "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
1242 np, range.size);
1243 unittest(range.cpu_addr == 0x00000000,
1244 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
1245 range.cpu_addr, np);
1246 unittest(range.pci_addr == 0xc0000000,
1247 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
1248 range.pci_addr, np);
1249 }
1250
1251 of_node_put(np);
1252}
1253
1254static void __init of_unittest_bus_ranges(void)
1255{
1256 struct device_node *np;
1257 struct of_range range;
1258 struct of_range_parser parser;
1259 struct resource res;
1260 int ret, count, i = 0;
1261
1262 np = of_find_node_by_path("/testcase-data/address-tests");
1263 if (!np) {
1264 pr_err("missing testcase data\n");
1265 return;
1266 }
1267
1268 if (of_range_parser_init(&parser, np)) {
1269 pr_err("missing ranges property\n");
1270 return;
1271 }
1272
1273 ret = of_range_to_resource(np, 1, &res);
1274 unittest(!ret, "of_range_to_resource returned error (%d) node %pOF\n",
1275 ret, np);
1276 unittest(resource_type(&res) == IORESOURCE_MEM,
1277 "of_range_to_resource wrong resource type on node %pOF res=%pR\n",
1278 np, &res);
1279 unittest(res.start == 0xd0000000,
1280 "of_range_to_resource wrong resource start address on node %pOF res=%pR\n",
1281 np, &res);
1282 unittest(resource_size(&res) == 0x20000000,
1283 "of_range_to_resource wrong resource start address on node %pOF res=%pR\n",
1284 np, &res);
1285
1286 count = of_range_count(&parser);
1287 unittest(count == 2,
1288 "of_range_count wrong size on node %pOF count=%d\n",
1289 np, count);
1290
1291 /*
1292 * Get the "ranges" from the device tree
1293 */
1294 for_each_of_range(&parser, &range) {
1295 unittest(range.flags == IORESOURCE_MEM,
1296 "for_each_of_range wrong flags on node %pOF flags=%x (expected %x)\n",
1297 np, range.flags, IORESOURCE_MEM);
1298 if (!i) {
1299 unittest(range.size == 0x50000000,
1300 "for_each_of_range wrong size on node %pOF size=%llx\n",
1301 np, range.size);
1302 unittest(range.cpu_addr == 0x70000000,
1303 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1304 range.cpu_addr, np);
1305 unittest(range.bus_addr == 0x70000000,
1306 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1307 range.pci_addr, np);
1308 } else {
1309 unittest(range.size == 0x20000000,
1310 "for_each_of_range wrong size on node %pOF size=%llx\n",
1311 np, range.size);
1312 unittest(range.cpu_addr == 0xd0000000,
1313 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1314 range.cpu_addr, np);
1315 unittest(range.bus_addr == 0x00000000,
1316 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1317 range.pci_addr, np);
1318 }
1319 i++;
1320 }
1321
1322 of_node_put(np);
1323}
1324
1325static void __init of_unittest_bus_3cell_ranges(void)
1326{
1327 struct device_node *np;
1328 struct of_range range;
1329 struct of_range_parser parser;
1330 int i = 0;
1331
1332 np = of_find_node_by_path("/testcase-data/address-tests/bus@a0000000");
1333 if (!np) {
1334 pr_err("missing testcase data\n");
1335 return;
1336 }
1337
1338 if (of_range_parser_init(&parser, np)) {
1339 pr_err("missing ranges property\n");
1340 return;
1341 }
1342
1343 /*
1344 * Get the "ranges" from the device tree
1345 */
1346 for_each_of_range(&parser, &range) {
1347 if (!i) {
1348 unittest(range.flags == 0xf00baa,
1349 "for_each_of_range wrong flags on node %pOF flags=%x\n",
1350 np, range.flags);
1351 unittest(range.size == 0x100000,
1352 "for_each_of_range wrong size on node %pOF size=%llx\n",
1353 np, range.size);
1354 unittest(range.cpu_addr == 0xa0000000,
1355 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1356 range.cpu_addr, np);
1357 unittest(range.bus_addr == 0x0,
1358 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1359 range.pci_addr, np);
1360 } else {
1361 unittest(range.flags == 0xf00bee,
1362 "for_each_of_range wrong flags on node %pOF flags=%x\n",
1363 np, range.flags);
1364 unittest(range.size == 0x200000,
1365 "for_each_of_range wrong size on node %pOF size=%llx\n",
1366 np, range.size);
1367 unittest(range.cpu_addr == 0xb0000000,
1368 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1369 range.cpu_addr, np);
1370 unittest(range.bus_addr == 0x100000000,
1371 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1372 range.pci_addr, np);
1373 }
1374 i++;
1375 }
1376
1377 of_node_put(np);
1378}
1379
1380static void __init of_unittest_reg(void)
1381{
1382 struct device_node *np;
1383 struct resource res;
1384 int ret;
1385 u64 addr, size;
1386
1387 np = of_find_node_by_path("/testcase-data/address-tests/bus@80000000/device@1000");
1388 if (!np) {
1389 pr_err("missing testcase data\n");
1390 return;
1391 }
1392
1393 ret = of_property_read_reg(np, 0, &addr, &size);
1394 unittest(!ret, "of_property_read_reg(%pOF) returned error %d\n",
1395 np, ret);
1396 unittest(addr == 0x1000, "of_property_read_reg(%pOF) untranslated address (%llx) incorrect\n",
1397 np, addr);
1398
1399 of_node_put(np);
1400
1401 np = of_find_node_by_path("/testcase-data/platform-tests-2/node/test-device@100");
1402 if (!np) {
1403 pr_err("missing testcase data\n");
1404 return;
1405 }
1406
1407 ret = of_address_to_resource(np, 0, &res);
1408 unittest(ret == -EINVAL, "of_address_to_resource(%pOF) expected error on untranslatable address\n",
1409 np);
1410
1411 of_node_put(np);
1412
1413}
1414
1415struct of_unittest_expected_res {
1416 int index;
1417 struct resource res;
1418};
1419
1420static void __init of_unittest_check_addr(const char *node_path,
1421 const struct of_unittest_expected_res *tab_exp,
1422 unsigned int tab_exp_count)
1423{
1424 const struct of_unittest_expected_res *expected;
1425 struct device_node *np;
1426 struct resource res;
1427 unsigned int count;
1428 int ret;
1429
1430 if (!IS_ENABLED(CONFIG_OF_ADDRESS))
1431 return;
1432
1433 np = of_find_node_by_path(node_path);
1434 if (!np) {
1435 pr_err("missing testcase data (%s)\n", node_path);
1436 return;
1437 }
1438
1439 expected = tab_exp;
1440 count = tab_exp_count;
1441 while (count--) {
1442 ret = of_address_to_resource(np, expected->index, &res);
1443 unittest(!ret, "of_address_to_resource(%pOF, %d) returned error %d\n",
1444 np, expected->index, ret);
1445 unittest(resource_type(&res) == resource_type(&expected->res) &&
1446 res.start == expected->res.start &&
1447 resource_size(&res) == resource_size(&expected->res),
1448 "of_address_to_resource(%pOF, %d) wrong resource %pR, expected %pR\n",
1449 np, expected->index, &res, &expected->res);
1450 expected++;
1451 }
1452
1453 of_node_put(np);
1454}
1455
1456static const struct of_unittest_expected_res of_unittest_reg_2cell_expected_res[] = {
1457 {.index = 0, .res = DEFINE_RES_MEM(0xa0a01000, 0x100) },
1458 {.index = 1, .res = DEFINE_RES_MEM(0xa0a02000, 0x100) },
1459 {.index = 2, .res = DEFINE_RES_MEM(0xc0c01000, 0x100) },
1460 {.index = 3, .res = DEFINE_RES_MEM(0xd0d01000, 0x100) },
1461};
1462
1463static const struct of_unittest_expected_res of_unittest_reg_3cell_expected_res[] = {
1464 {.index = 0, .res = DEFINE_RES_MEM(0xa0a01000, 0x100) },
1465 {.index = 1, .res = DEFINE_RES_MEM(0xa0b02000, 0x100) },
1466 {.index = 2, .res = DEFINE_RES_MEM(0xc0c01000, 0x100) },
1467 {.index = 3, .res = DEFINE_RES_MEM(0xc0c09000, 0x100) },
1468 {.index = 4, .res = DEFINE_RES_MEM(0xd0d01000, 0x100) },
1469};
1470
1471static const struct of_unittest_expected_res of_unittest_reg_pci_expected_res[] = {
1472 {.index = 0, .res = DEFINE_RES_MEM(0xe8001000, 0x1000) },
1473 {.index = 1, .res = DEFINE_RES_MEM(0xea002000, 0x2000) },
1474};
1475
1476static void __init of_unittest_translate_addr(void)
1477{
1478 of_unittest_check_addr("/testcase-data/address-tests2/bus-2cell@10000000/device@100000",
1479 of_unittest_reg_2cell_expected_res,
1480 ARRAY_SIZE(of_unittest_reg_2cell_expected_res));
1481
1482 of_unittest_check_addr("/testcase-data/address-tests2/bus-3cell@20000000/local-bus@100000/device@f1001000",
1483 of_unittest_reg_3cell_expected_res,
1484 ARRAY_SIZE(of_unittest_reg_3cell_expected_res));
1485
1486 of_unittest_check_addr("/testcase-data/address-tests2/pcie@d1070000/pci@0,0/dev@0,0/local-bus@0/dev@e0000000",
1487 of_unittest_reg_pci_expected_res,
1488 ARRAY_SIZE(of_unittest_reg_pci_expected_res));
1489}
1490
1491static void __init of_unittest_parse_interrupts(void)
1492{
1493 struct device_node *np;
1494 struct of_phandle_args args;
1495 int i, rc;
1496
1497 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
1498 return;
1499
1500 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
1501 if (!np) {
1502 pr_err("missing testcase data\n");
1503 return;
1504 }
1505
1506 for (i = 0; i < 4; i++) {
1507 bool passed = true;
1508
1509 memset(&args, 0, sizeof(args));
1510 rc = of_irq_parse_one(np, i, &args);
1511
1512 passed &= !rc;
1513 passed &= (args.args_count == 1);
1514 passed &= (args.args[0] == (i + 1));
1515
1516 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1517 i, args.np, rc);
1518 }
1519 of_node_put(np);
1520
1521 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
1522 if (!np) {
1523 pr_err("missing testcase data\n");
1524 return;
1525 }
1526
1527 for (i = 0; i < 4; i++) {
1528 bool passed = true;
1529
1530 memset(&args, 0, sizeof(args));
1531 rc = of_irq_parse_one(np, i, &args);
1532
1533 /* Test the values from tests-phandle.dtsi */
1534 switch (i) {
1535 case 0:
1536 passed &= !rc;
1537 passed &= (args.args_count == 1);
1538 passed &= (args.args[0] == 9);
1539 break;
1540 case 1:
1541 passed &= !rc;
1542 passed &= (args.args_count == 3);
1543 passed &= (args.args[0] == 10);
1544 passed &= (args.args[1] == 11);
1545 passed &= (args.args[2] == 12);
1546 break;
1547 case 2:
1548 passed &= !rc;
1549 passed &= (args.args_count == 2);
1550 passed &= (args.args[0] == 13);
1551 passed &= (args.args[1] == 14);
1552 break;
1553 case 3:
1554 passed &= !rc;
1555 passed &= (args.args_count == 2);
1556 passed &= (args.args[0] == 15);
1557 passed &= (args.args[1] == 16);
1558 break;
1559 default:
1560 passed = false;
1561 }
1562 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1563 i, args.np, rc);
1564 }
1565 of_node_put(np);
1566}
1567
1568static void __init of_unittest_parse_interrupts_extended(void)
1569{
1570 struct device_node *np;
1571 struct of_phandle_args args;
1572 int i, rc;
1573
1574 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
1575 return;
1576
1577 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
1578 if (!np) {
1579 pr_err("missing testcase data\n");
1580 return;
1581 }
1582
1583 for (i = 0; i < 7; i++) {
1584 bool passed = true;
1585
1586 memset(&args, 0, sizeof(args));
1587 rc = of_irq_parse_one(np, i, &args);
1588
1589 /* Test the values from tests-phandle.dtsi */
1590 switch (i) {
1591 case 0:
1592 passed &= !rc;
1593 passed &= (args.args_count == 1);
1594 passed &= (args.args[0] == 1);
1595 break;
1596 case 1:
1597 passed &= !rc;
1598 passed &= (args.args_count == 3);
1599 passed &= (args.args[0] == 2);
1600 passed &= (args.args[1] == 3);
1601 passed &= (args.args[2] == 4);
1602 break;
1603 case 2:
1604 passed &= !rc;
1605 passed &= (args.args_count == 2);
1606 passed &= (args.args[0] == 5);
1607 passed &= (args.args[1] == 6);
1608 break;
1609 case 3:
1610 passed &= !rc;
1611 passed &= (args.args_count == 1);
1612 passed &= (args.args[0] == 9);
1613 break;
1614 case 4:
1615 passed &= !rc;
1616 passed &= (args.args_count == 3);
1617 passed &= (args.args[0] == 10);
1618 passed &= (args.args[1] == 11);
1619 passed &= (args.args[2] == 12);
1620 break;
1621 case 5:
1622 passed &= !rc;
1623 passed &= (args.args_count == 2);
1624 passed &= (args.args[0] == 13);
1625 passed &= (args.args[1] == 14);
1626 break;
1627 case 6:
1628 /*
1629 * Tests child node that is missing property
1630 * #address-cells. See the comments in
1631 * drivers/of/unittest-data/tests-interrupts.dtsi
1632 * nodes intmap1 and interrupts-extended0
1633 */
1634 passed &= !rc;
1635 passed &= (args.args_count == 1);
1636 passed &= (args.args[0] == 15);
1637 break;
1638 default:
1639 passed = false;
1640 }
1641
1642 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1643 i, args.np, rc);
1644 }
1645 of_node_put(np);
1646}
1647
1648static const struct of_device_id match_node_table[] = {
1649 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
1650 { .data = "B", .type = "type1", }, /* followed by type alone */
1651
1652 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
1653 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
1654 { .data = "Cc", .name = "name2", .type = "type2", },
1655
1656 { .data = "E", .compatible = "compat3" },
1657 { .data = "G", .compatible = "compat2", },
1658 { .data = "H", .compatible = "compat2", .name = "name5", },
1659 { .data = "I", .compatible = "compat2", .type = "type1", },
1660 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
1661 { .data = "K", .compatible = "compat2", .name = "name9", },
1662 {}
1663};
1664
1665static struct {
1666 const char *path;
1667 const char *data;
1668} match_node_tests[] = {
1669 { .path = "/testcase-data/match-node/name0", .data = "A", },
1670 { .path = "/testcase-data/match-node/name1", .data = "B", },
1671 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
1672 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
1673 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
1674 { .path = "/testcase-data/match-node/name3", .data = "E", },
1675 { .path = "/testcase-data/match-node/name4", .data = "G", },
1676 { .path = "/testcase-data/match-node/name5", .data = "H", },
1677 { .path = "/testcase-data/match-node/name6", .data = "G", },
1678 { .path = "/testcase-data/match-node/name7", .data = "I", },
1679 { .path = "/testcase-data/match-node/name8", .data = "J", },
1680 { .path = "/testcase-data/match-node/name9", .data = "K", },
1681};
1682
1683static void __init of_unittest_match_node(void)
1684{
1685 struct device_node *np;
1686 const struct of_device_id *match;
1687 int i;
1688
1689 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
1690 np = of_find_node_by_path(match_node_tests[i].path);
1691 if (!np) {
1692 unittest(0, "missing testcase node %s\n",
1693 match_node_tests[i].path);
1694 continue;
1695 }
1696
1697 match = of_match_node(match_node_table, np);
1698 if (!match) {
1699 unittest(0, "%s didn't match anything\n",
1700 match_node_tests[i].path);
1701 continue;
1702 }
1703
1704 if (strcmp(match->data, match_node_tests[i].data) != 0) {
1705 unittest(0, "%s got wrong match. expected %s, got %s\n",
1706 match_node_tests[i].path, match_node_tests[i].data,
1707 (const char *)match->data);
1708 continue;
1709 }
1710 unittest(1, "passed");
1711 }
1712}
1713
1714static struct resource test_bus_res = DEFINE_RES_MEM(0xfffffff8, 2);
1715static const struct platform_device_info test_bus_info = {
1716 .name = "unittest-bus",
1717};
1718static void __init of_unittest_platform_populate(void)
1719{
1720 int irq, rc;
1721 struct device_node *np, *child, *grandchild;
1722 struct platform_device *pdev, *test_bus;
1723 const struct of_device_id match[] = {
1724 { .compatible = "test-device", },
1725 {}
1726 };
1727
1728 np = of_find_node_by_path("/testcase-data");
1729 of_platform_default_populate(np, NULL, NULL);
1730
1731 /* Test that a missing irq domain returns -EPROBE_DEFER */
1732 np = of_find_node_by_path("/testcase-data/testcase-device1");
1733 pdev = of_find_device_by_node(np);
1734 unittest(pdev, "device 1 creation failed\n");
1735
1736 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
1737 irq = platform_get_irq(pdev, 0);
1738 unittest(irq == -EPROBE_DEFER,
1739 "device deferred probe failed - %d\n", irq);
1740
1741 /* Test that a parsing failure does not return -EPROBE_DEFER */
1742 np = of_find_node_by_path("/testcase-data/testcase-device2");
1743 pdev = of_find_device_by_node(np);
1744 unittest(pdev, "device 2 creation failed\n");
1745
1746 EXPECT_BEGIN(KERN_INFO,
1747 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
1748
1749 irq = platform_get_irq(pdev, 0);
1750
1751 EXPECT_END(KERN_INFO,
1752 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
1753
1754 unittest(irq < 0 && irq != -EPROBE_DEFER,
1755 "device parsing error failed - %d\n", irq);
1756 }
1757
1758 np = of_find_node_by_path("/testcase-data/platform-tests");
1759 unittest(np, "No testcase data in device tree\n");
1760 if (!np)
1761 return;
1762
1763 test_bus = platform_device_register_full(&test_bus_info);
1764 rc = PTR_ERR_OR_ZERO(test_bus);
1765 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
1766 if (rc) {
1767 of_node_put(np);
1768 return;
1769 }
1770 test_bus->dev.of_node = np;
1771
1772 /*
1773 * Add a dummy resource to the test bus node after it is
1774 * registered to catch problems with un-inserted resources. The
1775 * DT code doesn't insert the resources, and it has caused the
1776 * kernel to oops in the past. This makes sure the same bug
1777 * doesn't crop up again.
1778 */
1779 platform_device_add_resources(test_bus, &test_bus_res, 1);
1780
1781 of_platform_populate(np, match, NULL, &test_bus->dev);
1782 for_each_child_of_node(np, child) {
1783 for_each_child_of_node(child, grandchild) {
1784 pdev = of_find_device_by_node(grandchild);
1785 unittest(pdev,
1786 "Could not create device for node '%pOFn'\n",
1787 grandchild);
1788 platform_device_put(pdev);
1789 }
1790 }
1791
1792 of_platform_depopulate(&test_bus->dev);
1793 for_each_child_of_node(np, child) {
1794 for_each_child_of_node(child, grandchild)
1795 unittest(!of_find_device_by_node(grandchild),
1796 "device didn't get destroyed '%pOFn'\n",
1797 grandchild);
1798 }
1799
1800 platform_device_unregister(test_bus);
1801 of_node_put(np);
1802}
1803
1804/**
1805 * update_node_properties - adds the properties
1806 * of np into dup node (present in live tree) and
1807 * updates parent of children of np to dup.
1808 *
1809 * @np: node whose properties are being added to the live tree
1810 * @dup: node present in live tree to be updated
1811 */
1812static void update_node_properties(struct device_node *np,
1813 struct device_node *dup)
1814{
1815 struct property *prop;
1816 struct property *save_next;
1817 struct device_node *child;
1818 int ret;
1819
1820 for_each_child_of_node(np, child)
1821 child->parent = dup;
1822
1823 /*
1824 * "unittest internal error: unable to add testdata property"
1825 *
1826 * If this message reports a property in node '/__symbols__' then
1827 * the respective unittest overlay contains a label that has the
1828 * same name as a label in the live devicetree. The label will
1829 * be in the live devicetree only if the devicetree source was
1830 * compiled with the '-@' option. If you encounter this error,
1831 * please consider renaming __all__ of the labels in the unittest
1832 * overlay dts files with an odd prefix that is unlikely to be
1833 * used in a real devicetree.
1834 */
1835
1836 /*
1837 * open code for_each_property_of_node() because of_add_property()
1838 * sets prop->next to NULL
1839 */
1840 for (prop = np->properties; prop != NULL; prop = save_next) {
1841 save_next = prop->next;
1842 ret = of_add_property(dup, prop);
1843 if (ret) {
1844 if (ret == -EEXIST && !strcmp(prop->name, "name"))
1845 continue;
1846 pr_err("unittest internal error: unable to add testdata property %pOF/%s",
1847 np, prop->name);
1848 }
1849 }
1850}
1851
1852/**
1853 * attach_node_and_children - attaches nodes
1854 * and its children to live tree.
1855 * CAUTION: misleading function name - if node @np already exists in
1856 * the live tree then children of @np are *not* attached to the live
1857 * tree. This works for the current test devicetree nodes because such
1858 * nodes do not have child nodes.
1859 *
1860 * @np: Node to attach to live tree
1861 */
1862static void attach_node_and_children(struct device_node *np)
1863{
1864 struct device_node *next, *dup, *child;
1865 unsigned long flags;
1866 const char *full_name;
1867
1868 full_name = kasprintf(GFP_KERNEL, "%pOF", np);
1869 if (!full_name)
1870 return;
1871
1872 if (!strcmp(full_name, "/__local_fixups__") ||
1873 !strcmp(full_name, "/__fixups__")) {
1874 kfree(full_name);
1875 return;
1876 }
1877
1878 dup = of_find_node_by_path(full_name);
1879 kfree(full_name);
1880 if (dup) {
1881 update_node_properties(np, dup);
1882 return;
1883 }
1884
1885 child = np->child;
1886 np->child = NULL;
1887
1888 mutex_lock(&of_mutex);
1889 raw_spin_lock_irqsave(&devtree_lock, flags);
1890 np->sibling = np->parent->child;
1891 np->parent->child = np;
1892 of_node_clear_flag(np, OF_DETACHED);
1893 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1894
1895 __of_attach_node_sysfs(np);
1896 mutex_unlock(&of_mutex);
1897
1898 while (child) {
1899 next = child->sibling;
1900 attach_node_and_children(child);
1901 child = next;
1902 }
1903}
1904
1905/**
1906 * unittest_data_add - Reads, copies data from
1907 * linked tree and attaches it to the live tree
1908 */
1909static int __init unittest_data_add(void)
1910{
1911 void *unittest_data;
1912 void *unittest_data_align;
1913 struct device_node *unittest_data_node = NULL, *np;
1914 /*
1915 * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically
1916 * created by cmd_wrap_S_dtbo in scripts/Makefile.dtbs
1917 */
1918 extern uint8_t __dtbo_testcases_begin[];
1919 extern uint8_t __dtbo_testcases_end[];
1920 const int size = __dtbo_testcases_end - __dtbo_testcases_begin;
1921 int rc;
1922 void *ret;
1923
1924 if (!size) {
1925 pr_warn("%s: testcases is empty\n", __func__);
1926 return -ENODATA;
1927 }
1928
1929 /* creating copy */
1930 unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL);
1931 if (!unittest_data)
1932 return -ENOMEM;
1933
1934 unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE);
1935 memcpy(unittest_data_align, __dtbo_testcases_begin, size);
1936
1937 ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node);
1938 if (!ret) {
1939 pr_warn("%s: unflatten testcases tree failed\n", __func__);
1940 kfree(unittest_data);
1941 return -ENODATA;
1942 }
1943 if (!unittest_data_node) {
1944 pr_warn("%s: testcases tree is empty\n", __func__);
1945 kfree(unittest_data);
1946 return -ENODATA;
1947 }
1948
1949 /*
1950 * This lock normally encloses of_resolve_phandles()
1951 */
1952 of_overlay_mutex_lock();
1953
1954 rc = of_resolve_phandles(unittest_data_node);
1955 if (rc) {
1956 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
1957 of_overlay_mutex_unlock();
1958 return -EINVAL;
1959 }
1960
1961 /* attach the sub-tree to live tree */
1962 if (!of_root) {
1963 pr_warn("%s: no live tree to attach sub-tree\n", __func__);
1964 kfree(unittest_data);
1965 return -ENODEV;
1966 }
1967
1968 EXPECT_BEGIN(KERN_INFO,
1969 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
1970
1971 np = unittest_data_node->child;
1972 while (np) {
1973 struct device_node *next = np->sibling;
1974
1975 np->parent = of_root;
1976 /* this will clear OF_DETACHED in np and children */
1977 attach_node_and_children(np);
1978 np = next;
1979 }
1980
1981 EXPECT_END(KERN_INFO,
1982 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
1983
1984 of_overlay_mutex_unlock();
1985
1986 return 0;
1987}
1988
1989#ifdef CONFIG_OF_OVERLAY
1990static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id);
1991
1992static int unittest_probe(struct platform_device *pdev)
1993{
1994 struct device *dev = &pdev->dev;
1995 struct device_node *np = dev->of_node;
1996
1997 if (np == NULL) {
1998 dev_err(dev, "No OF data for device\n");
1999 return -EINVAL;
2000
2001 }
2002
2003 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2004
2005 of_platform_populate(np, NULL, NULL, &pdev->dev);
2006
2007 return 0;
2008}
2009
2010static void unittest_remove(struct platform_device *pdev)
2011{
2012 struct device *dev = &pdev->dev;
2013 struct device_node *np = dev->of_node;
2014
2015 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2016}
2017
2018static const struct of_device_id unittest_match[] = {
2019 { .compatible = "unittest", },
2020 {},
2021};
2022
2023static struct platform_driver unittest_driver = {
2024 .probe = unittest_probe,
2025 .remove = unittest_remove,
2026 .driver = {
2027 .name = "unittest",
2028 .of_match_table = unittest_match,
2029 },
2030};
2031
2032/* get the platform device instantiated at the path */
2033static struct platform_device *of_path_to_platform_device(const char *path)
2034{
2035 struct device_node *np;
2036 struct platform_device *pdev;
2037
2038 np = of_find_node_by_path(path);
2039 if (np == NULL)
2040 return NULL;
2041
2042 pdev = of_find_device_by_node(np);
2043 of_node_put(np);
2044
2045 return pdev;
2046}
2047
2048/* find out if a platform device exists at that path */
2049static int of_path_platform_device_exists(const char *path)
2050{
2051 struct platform_device *pdev;
2052
2053 pdev = of_path_to_platform_device(path);
2054 platform_device_put(pdev);
2055 return pdev != NULL;
2056}
2057
2058#ifdef CONFIG_OF_GPIO
2059
2060struct unittest_gpio_dev {
2061 struct gpio_chip chip;
2062};
2063
2064static int unittest_gpio_chip_request_count;
2065static int unittest_gpio_probe_count;
2066static int unittest_gpio_probe_pass_count;
2067
2068static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset)
2069{
2070 unittest_gpio_chip_request_count++;
2071
2072 pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset,
2073 unittest_gpio_chip_request_count);
2074 return 0;
2075}
2076
2077static int unittest_gpio_probe(struct platform_device *pdev)
2078{
2079 struct unittest_gpio_dev *devptr;
2080 int ret;
2081
2082 unittest_gpio_probe_count++;
2083
2084 devptr = kzalloc(sizeof(*devptr), GFP_KERNEL);
2085 if (!devptr)
2086 return -ENOMEM;
2087
2088 platform_set_drvdata(pdev, devptr);
2089
2090 devptr->chip.fwnode = dev_fwnode(&pdev->dev);
2091 devptr->chip.label = "of-unittest-gpio";
2092 devptr->chip.base = -1; /* dynamic allocation */
2093 devptr->chip.ngpio = 5;
2094 devptr->chip.request = unittest_gpio_chip_request;
2095
2096 ret = gpiochip_add_data(&devptr->chip, NULL);
2097
2098 unittest(!ret,
2099 "gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret);
2100
2101 if (!ret)
2102 unittest_gpio_probe_pass_count++;
2103 return ret;
2104}
2105
2106static void unittest_gpio_remove(struct platform_device *pdev)
2107{
2108 struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev);
2109 struct device *dev = &pdev->dev;
2110
2111 dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode);
2112
2113 if (devptr->chip.base != -1)
2114 gpiochip_remove(&devptr->chip);
2115
2116 kfree(devptr);
2117}
2118
2119static const struct of_device_id unittest_gpio_id[] = {
2120 { .compatible = "unittest-gpio", },
2121 {}
2122};
2123
2124static struct platform_driver unittest_gpio_driver = {
2125 .probe = unittest_gpio_probe,
2126 .remove = unittest_gpio_remove,
2127 .driver = {
2128 .name = "unittest-gpio",
2129 .of_match_table = unittest_gpio_id,
2130 },
2131};
2132
2133static void __init of_unittest_overlay_gpio(void)
2134{
2135 int chip_request_count;
2136 int probe_pass_count;
2137 int ret;
2138
2139 /*
2140 * tests: apply overlays before registering driver
2141 * Similar to installing a driver as a module, the
2142 * driver is registered after applying the overlays.
2143 *
2144 * The overlays are applied by overlay_data_apply()
2145 * instead of of_unittest_apply_overlay() so that they
2146 * will not be tracked. Thus they will not be removed
2147 * by of_unittest_remove_tracked_overlays().
2148 *
2149 * - apply overlay_gpio_01
2150 * - apply overlay_gpio_02a
2151 * - apply overlay_gpio_02b
2152 * - register driver
2153 *
2154 * register driver will result in
2155 * - probe and processing gpio hog for overlay_gpio_01
2156 * - probe for overlay_gpio_02a
2157 * - processing gpio for overlay_gpio_02b
2158 */
2159
2160 probe_pass_count = unittest_gpio_probe_pass_count;
2161 chip_request_count = unittest_gpio_chip_request_count;
2162
2163 /*
2164 * overlay_gpio_01 contains gpio node and child gpio hog node
2165 * overlay_gpio_02a contains gpio node
2166 * overlay_gpio_02b contains child gpio hog node
2167 */
2168
2169 unittest(overlay_data_apply("overlay_gpio_01", NULL),
2170 "Adding overlay 'overlay_gpio_01' failed\n");
2171
2172 unittest(overlay_data_apply("overlay_gpio_02a", NULL),
2173 "Adding overlay 'overlay_gpio_02a' failed\n");
2174
2175 unittest(overlay_data_apply("overlay_gpio_02b", NULL),
2176 "Adding overlay 'overlay_gpio_02b' failed\n");
2177
2178 ret = platform_driver_register(&unittest_gpio_driver);
2179 if (unittest(ret == 0, "could not register unittest gpio driver\n"))
2180 return;
2181
2182 unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count,
2183 "unittest_gpio_probe() failed or not called\n");
2184
2185 unittest(chip_request_count + 2 == unittest_gpio_chip_request_count,
2186 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
2187 unittest_gpio_chip_request_count - chip_request_count);
2188
2189 /*
2190 * tests: apply overlays after registering driver
2191 *
2192 * Similar to a driver built-in to the kernel, the
2193 * driver is registered before applying the overlays.
2194 *
2195 * overlay_gpio_03 contains gpio node and child gpio hog node
2196 *
2197 * - apply overlay_gpio_03
2198 *
2199 * apply overlay will result in
2200 * - probe and processing gpio hog.
2201 */
2202
2203 probe_pass_count = unittest_gpio_probe_pass_count;
2204 chip_request_count = unittest_gpio_chip_request_count;
2205
2206 /* overlay_gpio_03 contains gpio node and child gpio hog node */
2207
2208 unittest(overlay_data_apply("overlay_gpio_03", NULL),
2209 "Adding overlay 'overlay_gpio_03' failed\n");
2210
2211 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
2212 "unittest_gpio_probe() failed or not called\n");
2213
2214 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
2215 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
2216 unittest_gpio_chip_request_count - chip_request_count);
2217
2218 /*
2219 * overlay_gpio_04a contains gpio node
2220 *
2221 * - apply overlay_gpio_04a
2222 *
2223 * apply the overlay will result in
2224 * - probe for overlay_gpio_04a
2225 */
2226
2227 probe_pass_count = unittest_gpio_probe_pass_count;
2228 chip_request_count = unittest_gpio_chip_request_count;
2229
2230 /* overlay_gpio_04a contains gpio node */
2231
2232 unittest(overlay_data_apply("overlay_gpio_04a", NULL),
2233 "Adding overlay 'overlay_gpio_04a' failed\n");
2234
2235 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
2236 "unittest_gpio_probe() failed or not called\n");
2237
2238 /*
2239 * overlay_gpio_04b contains child gpio hog node
2240 *
2241 * - apply overlay_gpio_04b
2242 *
2243 * apply the overlay will result in
2244 * - processing gpio for overlay_gpio_04b
2245 */
2246
2247 /* overlay_gpio_04b contains child gpio hog node */
2248
2249 unittest(overlay_data_apply("overlay_gpio_04b", NULL),
2250 "Adding overlay 'overlay_gpio_04b' failed\n");
2251
2252 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
2253 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
2254 unittest_gpio_chip_request_count - chip_request_count);
2255}
2256
2257#else
2258
2259static void __init of_unittest_overlay_gpio(void)
2260{
2261 /* skip tests */
2262}
2263
2264#endif
2265
2266#if IS_BUILTIN(CONFIG_I2C)
2267
2268/* get the i2c client device instantiated at the path */
2269static struct i2c_client *of_path_to_i2c_client(const char *path)
2270{
2271 struct device_node *np;
2272 struct i2c_client *client;
2273
2274 np = of_find_node_by_path(path);
2275 if (np == NULL)
2276 return NULL;
2277
2278 client = of_find_i2c_device_by_node(np);
2279 of_node_put(np);
2280
2281 return client;
2282}
2283
2284/* find out if a i2c client device exists at that path */
2285static int of_path_i2c_client_exists(const char *path)
2286{
2287 struct i2c_client *client;
2288
2289 client = of_path_to_i2c_client(path);
2290 if (client)
2291 put_device(&client->dev);
2292 return client != NULL;
2293}
2294#else
2295static int of_path_i2c_client_exists(const char *path)
2296{
2297 return 0;
2298}
2299#endif
2300
2301enum overlay_type {
2302 PDEV_OVERLAY,
2303 I2C_OVERLAY
2304};
2305
2306static int of_path_device_type_exists(const char *path,
2307 enum overlay_type 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
2318static const char *unittest_path(int nr, enum overlay_type ovtype)
2319{
2320 const char *base;
2321 static char buf[256];
2322
2323 switch (ovtype) {
2324 case PDEV_OVERLAY:
2325 base = "/testcase-data/overlay-node/test-bus";
2326 break;
2327 case I2C_OVERLAY:
2328 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
2329 break;
2330 default:
2331 buf[0] = '\0';
2332 return buf;
2333 }
2334 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
2335 buf[sizeof(buf) - 1] = '\0';
2336 return buf;
2337}
2338
2339static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
2340{
2341 const char *path;
2342
2343 path = unittest_path(unittest_nr, ovtype);
2344
2345 switch (ovtype) {
2346 case PDEV_OVERLAY:
2347 return of_path_platform_device_exists(path);
2348 case I2C_OVERLAY:
2349 return of_path_i2c_client_exists(path);
2350 }
2351 return 0;
2352}
2353
2354static const char *overlay_name_from_nr(int nr)
2355{
2356 static char buf[256];
2357
2358 snprintf(buf, sizeof(buf) - 1,
2359 "overlay_%d", nr);
2360 buf[sizeof(buf) - 1] = '\0';
2361
2362 return buf;
2363}
2364
2365static const char *bus_path = "/testcase-data/overlay-node/test-bus";
2366
2367#define MAX_TRACK_OVCS_IDS 256
2368
2369static int track_ovcs_id[MAX_TRACK_OVCS_IDS];
2370static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS];
2371static int track_ovcs_id_cnt;
2372
2373static void of_unittest_track_overlay(int ovcs_id, int overlay_nr)
2374{
2375 if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS))
2376 return;
2377
2378 track_ovcs_id[track_ovcs_id_cnt] = ovcs_id;
2379 track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr;
2380 track_ovcs_id_cnt++;
2381}
2382
2383static void of_unittest_untrack_overlay(int ovcs_id)
2384{
2385 if (WARN_ON(track_ovcs_id_cnt < 1))
2386 return;
2387
2388 track_ovcs_id_cnt--;
2389
2390 /* If out of synch then test is broken. Do not try to recover. */
2391 WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id);
2392}
2393
2394static void of_unittest_remove_tracked_overlays(void)
2395{
2396 int ret, ovcs_id, overlay_nr, save_ovcs_id;
2397 const char *overlay_name;
2398
2399 while (track_ovcs_id_cnt > 0) {
2400
2401 ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1];
2402 overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1];
2403 save_ovcs_id = ovcs_id;
2404 ret = of_overlay_remove(&ovcs_id);
2405 if (ret == -ENODEV) {
2406 overlay_name = overlay_name_from_nr(overlay_nr);
2407 pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n",
2408 __func__, overlay_name, ret);
2409 }
2410 of_unittest_untrack_overlay(save_ovcs_id);
2411 }
2412
2413}
2414
2415static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id)
2416{
2417 /*
2418 * The overlay will be tracked, thus it will be removed
2419 * by of_unittest_remove_tracked_overlays().
2420 */
2421
2422 const char *overlay_name;
2423
2424 overlay_name = overlay_name_from_nr(overlay_nr);
2425
2426 if (!overlay_data_apply(overlay_name, ovcs_id)) {
2427 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2428 return -EFAULT;
2429 }
2430 of_unittest_track_overlay(*ovcs_id, overlay_nr);
2431
2432 return 0;
2433}
2434
2435static 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 ret, ovcs_id;
2440
2441 /* unittest device must be in before state */
2442 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
2443 unittest(0, "%s with device @\"%s\" %s\n",
2444 overlay_name_from_nr(overlay_nr),
2445 unittest_path(unittest_nr, ovtype),
2446 !before ? "enabled" : "disabled");
2447 return -EINVAL;
2448 }
2449
2450 /* apply the overlay */
2451 ovcs_id = 0;
2452 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
2453 if (ret != 0) {
2454 /* of_unittest_apply_overlay already called unittest() */
2455 return ret;
2456 }
2457
2458 /* unittest device must be in after state */
2459 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
2460 unittest(0, "%s with device @\"%s\" %s\n",
2461 overlay_name_from_nr(overlay_nr),
2462 unittest_path(unittest_nr, ovtype),
2463 !after ? "enabled" : "disabled");
2464 return -EINVAL;
2465 }
2466
2467 return ovcs_id;
2468}
2469
2470/* apply an overlay while checking before and after states */
2471static int __init of_unittest_apply_overlay_check(int overlay_nr,
2472 int unittest_nr, int before, int after,
2473 enum overlay_type ovtype)
2474{
2475 int ovcs_id = __of_unittest_apply_overlay_check(overlay_nr,
2476 unittest_nr, before, after, ovtype);
2477 if (ovcs_id < 0)
2478 return ovcs_id;
2479
2480 return 0;
2481}
2482
2483/* apply an overlay and then revert it while checking before, after states */
2484static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
2485 int unittest_nr, int before, int after,
2486 enum overlay_type ovtype)
2487{
2488 int ret, ovcs_id, save_ovcs_id;
2489
2490 ovcs_id = __of_unittest_apply_overlay_check(overlay_nr, unittest_nr,
2491 before, after, ovtype);
2492 if (ovcs_id < 0)
2493 return ovcs_id;
2494
2495 /* remove the overlay */
2496 save_ovcs_id = ovcs_id;
2497 ret = of_overlay_remove(&ovcs_id);
2498 if (ret != 0) {
2499 unittest(0, "%s failed to be destroyed @\"%s\"\n",
2500 overlay_name_from_nr(overlay_nr),
2501 unittest_path(unittest_nr, ovtype));
2502 return ret;
2503 }
2504 of_unittest_untrack_overlay(save_ovcs_id);
2505
2506 /* unittest device must be again in before state */
2507 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
2508 unittest(0, "%s with device @\"%s\" %s\n",
2509 overlay_name_from_nr(overlay_nr),
2510 unittest_path(unittest_nr, ovtype),
2511 !before ? "enabled" : "disabled");
2512 return -EINVAL;
2513 }
2514
2515 return 0;
2516}
2517
2518/* test activation of device */
2519static void __init of_unittest_overlay_0(void)
2520{
2521 int ret;
2522
2523 EXPECT_BEGIN(KERN_INFO,
2524 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
2525
2526 /* device should enable */
2527 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
2528
2529 EXPECT_END(KERN_INFO,
2530 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
2531
2532 if (ret)
2533 return;
2534
2535 unittest(1, "overlay test %d passed\n", 0);
2536}
2537
2538/* test deactivation of device */
2539static void __init of_unittest_overlay_1(void)
2540{
2541 int ret;
2542
2543 EXPECT_BEGIN(KERN_INFO,
2544 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
2545
2546 /* device should disable */
2547 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
2548
2549 EXPECT_END(KERN_INFO,
2550 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
2551
2552 if (ret)
2553 return;
2554
2555 unittest(1, "overlay test %d passed\n", 1);
2556
2557}
2558
2559/* test activation of device */
2560static void __init of_unittest_overlay_2(void)
2561{
2562 int ret;
2563
2564 EXPECT_BEGIN(KERN_INFO,
2565 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
2566
2567 /* device should enable */
2568 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
2569
2570 EXPECT_END(KERN_INFO,
2571 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
2572
2573 if (ret)
2574 return;
2575 unittest(1, "overlay test %d passed\n", 2);
2576}
2577
2578/* test deactivation of device */
2579static void __init of_unittest_overlay_3(void)
2580{
2581 int ret;
2582
2583 EXPECT_BEGIN(KERN_INFO,
2584 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
2585
2586 /* device should disable */
2587 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
2588
2589 EXPECT_END(KERN_INFO,
2590 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
2591
2592 if (ret)
2593 return;
2594
2595 unittest(1, "overlay test %d passed\n", 3);
2596}
2597
2598/* test activation of a full device node */
2599static void __init of_unittest_overlay_4(void)
2600{
2601 /* device should disable */
2602 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
2603 return;
2604
2605 unittest(1, "overlay test %d passed\n", 4);
2606}
2607
2608/* test overlay apply/revert sequence */
2609static void __init of_unittest_overlay_5(void)
2610{
2611 int ret;
2612
2613 EXPECT_BEGIN(KERN_INFO,
2614 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
2615
2616 /* device should disable */
2617 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
2618
2619 EXPECT_END(KERN_INFO,
2620 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
2621
2622 if (ret)
2623 return;
2624
2625 unittest(1, "overlay test %d passed\n", 5);
2626}
2627
2628/* test overlay application in sequence */
2629static void __init of_unittest_overlay_6(void)
2630{
2631 int i, save_ovcs_id[2], ovcs_id;
2632 int overlay_nr = 6, unittest_nr = 6;
2633 int before = 0, after = 1;
2634 const char *overlay_name;
2635
2636 int ret;
2637
2638 /* unittest device must be in before state */
2639 for (i = 0; i < 2; i++) {
2640 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2641 != before) {
2642 unittest(0, "%s with device @\"%s\" %s\n",
2643 overlay_name_from_nr(overlay_nr + i),
2644 unittest_path(unittest_nr + i,
2645 PDEV_OVERLAY),
2646 !before ? "enabled" : "disabled");
2647 return;
2648 }
2649 }
2650
2651 /* apply the overlays */
2652
2653 EXPECT_BEGIN(KERN_INFO,
2654 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
2655
2656 overlay_name = overlay_name_from_nr(overlay_nr + 0);
2657
2658 ret = overlay_data_apply(overlay_name, &ovcs_id);
2659
2660 if (!ret) {
2661 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2662 return;
2663 }
2664 save_ovcs_id[0] = ovcs_id;
2665 of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
2666
2667 EXPECT_END(KERN_INFO,
2668 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
2669
2670 EXPECT_BEGIN(KERN_INFO,
2671 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
2672
2673 overlay_name = overlay_name_from_nr(overlay_nr + 1);
2674
2675 ret = overlay_data_apply(overlay_name, &ovcs_id);
2676
2677 if (!ret) {
2678 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2679 return;
2680 }
2681 save_ovcs_id[1] = ovcs_id;
2682 of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
2683
2684 EXPECT_END(KERN_INFO,
2685 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
2686
2687
2688 for (i = 0; i < 2; i++) {
2689 /* unittest device must be in after state */
2690 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2691 != after) {
2692 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
2693 overlay_name_from_nr(overlay_nr + i),
2694 unittest_path(unittest_nr + i,
2695 PDEV_OVERLAY),
2696 !after ? "enabled" : "disabled");
2697 return;
2698 }
2699 }
2700
2701 for (i = 1; i >= 0; i--) {
2702 ovcs_id = save_ovcs_id[i];
2703 if (of_overlay_remove(&ovcs_id)) {
2704 unittest(0, "%s failed destroy @\"%s\"\n",
2705 overlay_name_from_nr(overlay_nr + i),
2706 unittest_path(unittest_nr + i,
2707 PDEV_OVERLAY));
2708 return;
2709 }
2710 of_unittest_untrack_overlay(save_ovcs_id[i]);
2711 }
2712
2713 for (i = 0; i < 2; i++) {
2714 /* unittest device must be again in before state */
2715 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2716 != before) {
2717 unittest(0, "%s with device @\"%s\" %s\n",
2718 overlay_name_from_nr(overlay_nr + i),
2719 unittest_path(unittest_nr + i,
2720 PDEV_OVERLAY),
2721 !before ? "enabled" : "disabled");
2722 return;
2723 }
2724 }
2725
2726 unittest(1, "overlay test %d passed\n", 6);
2727
2728}
2729
2730/* test overlay application in sequence */
2731static void __init of_unittest_overlay_8(void)
2732{
2733 int i, save_ovcs_id[2], ovcs_id;
2734 int overlay_nr = 8, unittest_nr = 8;
2735 const char *overlay_name;
2736 int ret;
2737
2738 /* we don't care about device state in this test */
2739
2740 EXPECT_BEGIN(KERN_INFO,
2741 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
2742
2743 overlay_name = overlay_name_from_nr(overlay_nr + 0);
2744
2745 ret = overlay_data_apply(overlay_name, &ovcs_id);
2746 if (!ret)
2747 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2748
2749 EXPECT_END(KERN_INFO,
2750 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
2751
2752 if (!ret)
2753 return;
2754
2755 save_ovcs_id[0] = ovcs_id;
2756 of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
2757
2758 overlay_name = overlay_name_from_nr(overlay_nr + 1);
2759
2760 EXPECT_BEGIN(KERN_INFO,
2761 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
2762
2763 /* apply the overlays */
2764 ret = overlay_data_apply(overlay_name, &ovcs_id);
2765
2766 EXPECT_END(KERN_INFO,
2767 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
2768
2769 if (!ret) {
2770 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2771 return;
2772 }
2773
2774 save_ovcs_id[1] = ovcs_id;
2775 of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
2776
2777 /* now try to remove first overlay (it should fail) */
2778 ovcs_id = save_ovcs_id[0];
2779
2780 EXPECT_BEGIN(KERN_INFO,
2781 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
2782
2783 EXPECT_BEGIN(KERN_INFO,
2784 "OF: overlay: overlay #6 is not topmost");
2785
2786 ret = of_overlay_remove(&ovcs_id);
2787
2788 EXPECT_END(KERN_INFO,
2789 "OF: overlay: overlay #6 is not topmost");
2790
2791 EXPECT_END(KERN_INFO,
2792 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
2793
2794 if (!ret) {
2795 /*
2796 * Should never get here. If we do, expect a lot of
2797 * subsequent tracking and overlay removal related errors.
2798 */
2799 unittest(0, "%s was destroyed @\"%s\"\n",
2800 overlay_name_from_nr(overlay_nr + 0),
2801 unittest_path(unittest_nr,
2802 PDEV_OVERLAY));
2803 return;
2804 }
2805
2806 /* removing them in order should work */
2807 for (i = 1; i >= 0; i--) {
2808 ovcs_id = save_ovcs_id[i];
2809 if (of_overlay_remove(&ovcs_id)) {
2810 unittest(0, "%s not destroyed @\"%s\"\n",
2811 overlay_name_from_nr(overlay_nr + i),
2812 unittest_path(unittest_nr,
2813 PDEV_OVERLAY));
2814 return;
2815 }
2816 of_unittest_untrack_overlay(save_ovcs_id[i]);
2817 }
2818
2819 unittest(1, "overlay test %d passed\n", 8);
2820}
2821
2822/* test insertion of a bus with parent devices */
2823static void __init of_unittest_overlay_10(void)
2824{
2825 int ret;
2826 char *child_path;
2827
2828 /* device should disable */
2829 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
2830
2831 if (unittest(ret == 0,
2832 "overlay test %d failed; overlay application\n", 10))
2833 return;
2834
2835 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
2836 unittest_path(10, PDEV_OVERLAY));
2837 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
2838 return;
2839
2840 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
2841 kfree(child_path);
2842
2843 unittest(ret, "overlay test %d failed; no child device\n", 10);
2844}
2845
2846/* test insertion of a bus with parent devices (and revert) */
2847static void __init of_unittest_overlay_11(void)
2848{
2849 int ret;
2850
2851 /* device should disable */
2852 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
2853 PDEV_OVERLAY);
2854
2855 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
2856}
2857
2858#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
2859
2860struct unittest_i2c_bus_data {
2861 struct platform_device *pdev;
2862 struct i2c_adapter adap;
2863};
2864
2865static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
2866 struct i2c_msg *msgs, int num)
2867{
2868 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
2869
2870 (void)std;
2871
2872 return num;
2873}
2874
2875static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
2876{
2877 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
2878}
2879
2880static const struct i2c_algorithm unittest_i2c_algo = {
2881 .master_xfer = unittest_i2c_master_xfer,
2882 .functionality = unittest_i2c_functionality,
2883};
2884
2885static int unittest_i2c_bus_probe(struct platform_device *pdev)
2886{
2887 struct device *dev = &pdev->dev;
2888 struct device_node *np = dev->of_node;
2889 struct unittest_i2c_bus_data *std;
2890 struct i2c_adapter *adap;
2891 int ret;
2892
2893 if (np == NULL) {
2894 dev_err(dev, "No OF data for device\n");
2895 return -EINVAL;
2896
2897 }
2898
2899 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2900
2901 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
2902 if (!std)
2903 return -ENOMEM;
2904
2905 /* link them together */
2906 std->pdev = pdev;
2907 platform_set_drvdata(pdev, std);
2908
2909 adap = &std->adap;
2910 i2c_set_adapdata(adap, std);
2911 adap->nr = -1;
2912 strscpy(adap->name, pdev->name, sizeof(adap->name));
2913 adap->class = I2C_CLASS_DEPRECATED;
2914 adap->algo = &unittest_i2c_algo;
2915 adap->dev.parent = dev;
2916 adap->dev.of_node = dev->of_node;
2917 adap->timeout = 5 * HZ;
2918 adap->retries = 3;
2919
2920 ret = i2c_add_numbered_adapter(adap);
2921 if (ret != 0) {
2922 dev_err(dev, "Failed to add I2C adapter\n");
2923 return ret;
2924 }
2925
2926 return 0;
2927}
2928
2929static void unittest_i2c_bus_remove(struct platform_device *pdev)
2930{
2931 struct device *dev = &pdev->dev;
2932 struct device_node *np = dev->of_node;
2933 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
2934
2935 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2936 i2c_del_adapter(&std->adap);
2937}
2938
2939static const struct of_device_id unittest_i2c_bus_match[] = {
2940 { .compatible = "unittest-i2c-bus", },
2941 {},
2942};
2943
2944static struct platform_driver unittest_i2c_bus_driver = {
2945 .probe = unittest_i2c_bus_probe,
2946 .remove = unittest_i2c_bus_remove,
2947 .driver = {
2948 .name = "unittest-i2c-bus",
2949 .of_match_table = unittest_i2c_bus_match,
2950 },
2951};
2952
2953static int unittest_i2c_dev_probe(struct i2c_client *client)
2954{
2955 struct device *dev = &client->dev;
2956 struct device_node *np = client->dev.of_node;
2957
2958 if (!np) {
2959 dev_err(dev, "No OF node\n");
2960 return -EINVAL;
2961 }
2962
2963 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2964
2965 return 0;
2966};
2967
2968static void unittest_i2c_dev_remove(struct i2c_client *client)
2969{
2970 struct device *dev = &client->dev;
2971 struct device_node *np = client->dev.of_node;
2972
2973 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2974}
2975
2976static const struct i2c_device_id unittest_i2c_dev_id[] = {
2977 { .name = "unittest-i2c-dev" },
2978 { }
2979};
2980
2981static struct i2c_driver unittest_i2c_dev_driver = {
2982 .driver = {
2983 .name = "unittest-i2c-dev",
2984 },
2985 .probe = unittest_i2c_dev_probe,
2986 .remove = unittest_i2c_dev_remove,
2987 .id_table = unittest_i2c_dev_id,
2988};
2989
2990#if IS_BUILTIN(CONFIG_I2C_MUX)
2991
2992static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
2993{
2994 return 0;
2995}
2996
2997static int unittest_i2c_mux_probe(struct i2c_client *client)
2998{
2999 int i, nchans;
3000 struct device *dev = &client->dev;
3001 struct i2c_adapter *adap = client->adapter;
3002 struct device_node *np = client->dev.of_node, *child;
3003 struct i2c_mux_core *muxc;
3004 u32 reg, max_reg;
3005
3006 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
3007
3008 if (!np) {
3009 dev_err(dev, "No OF node\n");
3010 return -EINVAL;
3011 }
3012
3013 max_reg = (u32)-1;
3014 for_each_child_of_node(np, child) {
3015 if (of_property_read_u32(child, "reg", ®))
3016 continue;
3017 if (max_reg == (u32)-1 || reg > max_reg)
3018 max_reg = reg;
3019 }
3020 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
3021 if (nchans == 0) {
3022 dev_err(dev, "No channels\n");
3023 return -EINVAL;
3024 }
3025
3026 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
3027 unittest_i2c_mux_select_chan, NULL);
3028 if (!muxc)
3029 return -ENOMEM;
3030 for (i = 0; i < nchans; i++) {
3031 if (i2c_mux_add_adapter(muxc, 0, i)) {
3032 dev_err(dev, "Failed to register mux #%d\n", i);
3033 i2c_mux_del_adapters(muxc);
3034 return -ENODEV;
3035 }
3036 }
3037
3038 i2c_set_clientdata(client, muxc);
3039
3040 return 0;
3041};
3042
3043static void unittest_i2c_mux_remove(struct i2c_client *client)
3044{
3045 struct device *dev = &client->dev;
3046 struct device_node *np = client->dev.of_node;
3047 struct i2c_mux_core *muxc = i2c_get_clientdata(client);
3048
3049 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
3050 i2c_mux_del_adapters(muxc);
3051}
3052
3053static const struct i2c_device_id unittest_i2c_mux_id[] = {
3054 { .name = "unittest-i2c-mux" },
3055 { }
3056};
3057
3058static struct i2c_driver unittest_i2c_mux_driver = {
3059 .driver = {
3060 .name = "unittest-i2c-mux",
3061 },
3062 .probe = unittest_i2c_mux_probe,
3063 .remove = unittest_i2c_mux_remove,
3064 .id_table = unittest_i2c_mux_id,
3065};
3066
3067#endif
3068
3069static int of_unittest_overlay_i2c_init(void)
3070{
3071 int ret;
3072
3073 ret = i2c_add_driver(&unittest_i2c_dev_driver);
3074 if (unittest(ret == 0,
3075 "could not register unittest i2c device driver\n"))
3076 return ret;
3077
3078 ret = platform_driver_register(&unittest_i2c_bus_driver);
3079
3080 if (unittest(ret == 0,
3081 "could not register unittest i2c bus driver\n"))
3082 return ret;
3083
3084#if IS_BUILTIN(CONFIG_I2C_MUX)
3085
3086 EXPECT_BEGIN(KERN_INFO,
3087 "i2c i2c-1: Added multiplexed i2c bus 2");
3088
3089 ret = i2c_add_driver(&unittest_i2c_mux_driver);
3090
3091 EXPECT_END(KERN_INFO,
3092 "i2c i2c-1: Added multiplexed i2c bus 2");
3093
3094 if (unittest(ret == 0,
3095 "could not register unittest i2c mux driver\n"))
3096 return ret;
3097#endif
3098
3099 return 0;
3100}
3101
3102static void of_unittest_overlay_i2c_cleanup(void)
3103{
3104#if IS_BUILTIN(CONFIG_I2C_MUX)
3105 i2c_del_driver(&unittest_i2c_mux_driver);
3106#endif
3107 platform_driver_unregister(&unittest_i2c_bus_driver);
3108 i2c_del_driver(&unittest_i2c_dev_driver);
3109}
3110
3111static void __init of_unittest_overlay_i2c_12(void)
3112{
3113 int ret;
3114
3115 /* device should enable */
3116 EXPECT_BEGIN(KERN_INFO,
3117 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
3118
3119 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
3120
3121 EXPECT_END(KERN_INFO,
3122 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
3123
3124 if (ret)
3125 return;
3126
3127 unittest(1, "overlay test %d passed\n", 12);
3128}
3129
3130/* test deactivation of device */
3131static void __init of_unittest_overlay_i2c_13(void)
3132{
3133 int ret;
3134
3135 EXPECT_BEGIN(KERN_INFO,
3136 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
3137
3138 /* device should disable */
3139 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
3140
3141 EXPECT_END(KERN_INFO,
3142 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
3143
3144 if (ret)
3145 return;
3146
3147 unittest(1, "overlay test %d passed\n", 13);
3148}
3149
3150/* just check for i2c mux existence */
3151static void of_unittest_overlay_i2c_14(void)
3152{
3153}
3154
3155static void __init of_unittest_overlay_i2c_15(void)
3156{
3157 int ret;
3158
3159 /* device should enable */
3160 EXPECT_BEGIN(KERN_INFO,
3161 "i2c i2c-1: Added multiplexed i2c bus 3");
3162
3163 ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY);
3164
3165 EXPECT_END(KERN_INFO,
3166 "i2c i2c-1: Added multiplexed i2c bus 3");
3167
3168 if (ret)
3169 return;
3170
3171 unittest(1, "overlay test %d passed\n", 15);
3172}
3173
3174#else
3175
3176static inline void of_unittest_overlay_i2c_14(void) { }
3177static inline void of_unittest_overlay_i2c_15(void) { }
3178
3179#endif
3180
3181static int of_notify(struct notifier_block *nb, unsigned long action,
3182 void *arg)
3183{
3184 struct of_overlay_notify_data *nd = arg;
3185 struct device_node *found;
3186 int ret;
3187
3188 /*
3189 * For overlay_16 .. overlay_19, check that returning an error
3190 * works for each of the actions by setting an arbitrary return
3191 * error number that matches the test number. e.g. for unittest16,
3192 * ret = -EBUSY which is -16.
3193 *
3194 * OVERLAY_INFO() for the overlays is declared to expect the same
3195 * error number, so overlay_data_apply() will return no error.
3196 *
3197 * overlay_20 will return NOTIFY_DONE
3198 */
3199
3200 ret = 0;
3201 of_node_get(nd->overlay);
3202
3203 switch (action) {
3204
3205 case OF_OVERLAY_PRE_APPLY:
3206 found = of_find_node_by_name(nd->overlay, "test-unittest16");
3207 if (found) {
3208 of_node_put(found);
3209 ret = -EBUSY;
3210 }
3211 break;
3212
3213 case OF_OVERLAY_POST_APPLY:
3214 found = of_find_node_by_name(nd->overlay, "test-unittest17");
3215 if (found) {
3216 of_node_put(found);
3217 ret = -EEXIST;
3218 }
3219 break;
3220
3221 case OF_OVERLAY_PRE_REMOVE:
3222 found = of_find_node_by_name(nd->overlay, "test-unittest18");
3223 if (found) {
3224 of_node_put(found);
3225 ret = -EXDEV;
3226 }
3227 break;
3228
3229 case OF_OVERLAY_POST_REMOVE:
3230 found = of_find_node_by_name(nd->overlay, "test-unittest19");
3231 if (found) {
3232 of_node_put(found);
3233 ret = -ENODEV;
3234 }
3235 break;
3236
3237 default: /* should not happen */
3238 of_node_put(nd->overlay);
3239 ret = -EINVAL;
3240 break;
3241 }
3242
3243 if (ret)
3244 return notifier_from_errno(ret);
3245
3246 return NOTIFY_DONE;
3247}
3248
3249static struct notifier_block of_nb = {
3250 .notifier_call = of_notify,
3251};
3252
3253static void __init of_unittest_overlay_notify(void)
3254{
3255 int ovcs_id;
3256 int ret;
3257
3258 ret = of_overlay_notifier_register(&of_nb);
3259 unittest(!ret,
3260 "of_overlay_notifier_register() failed, ret = %d\n", ret);
3261 if (ret)
3262 return;
3263
3264 /*
3265 * The overlays are applied by overlay_data_apply()
3266 * instead of of_unittest_apply_overlay() so that they
3267 * will not be tracked. Thus they will not be removed
3268 * by of_unittest_remove_tracked_overlays().
3269 *
3270 * Applying overlays 16 - 19 will each trigger an error for a
3271 * different action in of_notify().
3272 *
3273 * Applying overlay 20 will not trigger any error in of_notify().
3274 */
3275
3276 /* --- overlay 16 --- */
3277
3278 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
3279
3280 unittest(overlay_data_apply("overlay_16", &ovcs_id),
3281 "test OF_OVERLAY_PRE_APPLY notify injected error\n");
3282
3283 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
3284
3285 unittest(ovcs_id, "ovcs_id not created for overlay_16\n");
3286
3287 /* --- overlay 17 --- */
3288
3289 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
3290
3291 unittest(overlay_data_apply("overlay_17", &ovcs_id),
3292 "test OF_OVERLAY_POST_APPLY notify injected error\n");
3293
3294 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
3295
3296 unittest(ovcs_id, "ovcs_id not created for overlay_17\n");
3297
3298 /* --- overlay 18 --- */
3299
3300 unittest(overlay_data_apply("overlay_18", &ovcs_id),
3301 "OF_OVERLAY_PRE_REMOVE notify injected error\n");
3302
3303 unittest(ovcs_id, "ovcs_id not created for overlay_18\n");
3304
3305 if (ovcs_id) {
3306 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
3307
3308 ret = of_overlay_remove(&ovcs_id);
3309 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
3310 if (ret == -EXDEV) {
3311 /*
3312 * change set ovcs_id should still exist
3313 */
3314 unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n");
3315 } else {
3316 unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n");
3317 }
3318 } else {
3319 unittest(1, "ovcs_id not created for overlay_18\n");
3320 }
3321
3322 unittest(ovcs_id, "ovcs_id removed for overlay_18\n");
3323
3324 /* --- overlay 19 --- */
3325
3326 unittest(overlay_data_apply("overlay_19", &ovcs_id),
3327 "OF_OVERLAY_POST_REMOVE notify injected error\n");
3328
3329 unittest(ovcs_id, "ovcs_id not created for overlay_19\n");
3330
3331 if (ovcs_id) {
3332 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
3333 ret = of_overlay_remove(&ovcs_id);
3334 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
3335 if (ret == -ENODEV)
3336 unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n");
3337 else
3338 unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n");
3339 } else {
3340 unittest(1, "ovcs_id removed for overlay_19\n");
3341 }
3342
3343 unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n",
3344 ovcs_id);
3345
3346 /* --- overlay 20 --- */
3347
3348 unittest(overlay_data_apply("overlay_20", &ovcs_id),
3349 "overlay notify no injected error\n");
3350
3351 if (ovcs_id) {
3352 ret = of_overlay_remove(&ovcs_id);
3353 if (ret)
3354 unittest(1, "overlay_20 failed to be destroyed, ret = %d\n",
3355 ret);
3356 } else {
3357 unittest(1, "ovcs_id not created for overlay_20\n");
3358 }
3359
3360 unittest(!of_overlay_notifier_unregister(&of_nb),
3361 "of_overlay_notifier_unregister() failed, ret = %d\n", ret);
3362}
3363
3364static void __init of_unittest_overlay(void)
3365{
3366 struct device_node *bus_np = NULL;
3367 unsigned int i;
3368
3369 if (platform_driver_register(&unittest_driver)) {
3370 unittest(0, "could not register unittest driver\n");
3371 goto out;
3372 }
3373
3374 bus_np = of_find_node_by_path(bus_path);
3375 if (bus_np == NULL) {
3376 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
3377 goto out;
3378 }
3379
3380 if (of_platform_default_populate(bus_np, NULL, NULL)) {
3381 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
3382 goto out;
3383 }
3384
3385 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
3386 unittest(0, "could not find unittest0 @ \"%s\"\n",
3387 unittest_path(100, PDEV_OVERLAY));
3388 goto out;
3389 }
3390
3391 if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
3392 unittest(0, "unittest1 @ \"%s\" should not exist\n",
3393 unittest_path(101, PDEV_OVERLAY));
3394 goto out;
3395 }
3396
3397 unittest(1, "basic infrastructure of overlays passed");
3398
3399 /* tests in sequence */
3400 of_unittest_overlay_0();
3401 of_unittest_overlay_1();
3402 of_unittest_overlay_2();
3403 of_unittest_overlay_3();
3404 of_unittest_overlay_4();
3405 for (i = 0; i < 3; i++)
3406 of_unittest_overlay_5();
3407 of_unittest_overlay_6();
3408 of_unittest_overlay_8();
3409
3410 of_unittest_overlay_10();
3411 of_unittest_overlay_11();
3412
3413#if IS_BUILTIN(CONFIG_I2C)
3414 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
3415 goto out;
3416
3417 of_unittest_overlay_i2c_12();
3418 of_unittest_overlay_i2c_13();
3419 of_unittest_overlay_i2c_14();
3420 of_unittest_overlay_i2c_15();
3421
3422 of_unittest_overlay_i2c_cleanup();
3423#endif
3424
3425 of_unittest_overlay_gpio();
3426
3427 of_unittest_remove_tracked_overlays();
3428
3429 of_unittest_overlay_notify();
3430
3431out:
3432 of_node_put(bus_np);
3433}
3434
3435#else
3436static inline void __init of_unittest_overlay(void) { }
3437#endif
3438
3439static void __init of_unittest_lifecycle(void)
3440{
3441#ifdef CONFIG_OF_DYNAMIC
3442 unsigned int refcount;
3443 int found_refcount_one = 0;
3444 int put_count = 0;
3445 struct device_node *np;
3446 struct device_node *prev_sibling, *next_sibling;
3447 const char *refcount_path = "/testcase-data/refcount-node";
3448 const char *refcount_parent_path = "/testcase-data";
3449
3450 /*
3451 * Node lifecycle tests, non-dynamic node:
3452 *
3453 * - Decrementing refcount to zero via of_node_put() should cause the
3454 * attempt to free the node memory by of_node_release() to fail
3455 * because the node is not a dynamic node.
3456 *
3457 * - Decrementing refcount past zero should result in additional
3458 * errors reported.
3459 */
3460
3461 np = of_find_node_by_path(refcount_path);
3462 unittest(np, "find refcount_path \"%s\"\n", refcount_path);
3463 if (np == NULL)
3464 goto out_skip_tests;
3465
3466 while (!found_refcount_one) {
3467
3468 if (put_count++ > 10) {
3469 unittest(0, "guardrail to avoid infinite loop\n");
3470 goto out_skip_tests;
3471 }
3472
3473 refcount = kref_read(&np->kobj.kref);
3474 if (refcount == 1)
3475 found_refcount_one = 1;
3476 else
3477 of_node_put(np);
3478 }
3479
3480 EXPECT_BEGIN(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");
3481
3482 /*
3483 * refcount is now one, decrementing to zero will result in a call to
3484 * of_node_release() to free the node's memory, which should result
3485 * in an error
3486 */
3487 unittest(1, "/testcase-data/refcount-node is one");
3488 of_node_put(np);
3489
3490 EXPECT_END(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");
3491
3492
3493 /*
3494 * expect stack trace for subsequent of_node_put():
3495 * __refcount_sub_and_test() calls:
3496 * refcount_warn_saturate(r, REFCOUNT_SUB_UAF)
3497 *
3498 * Not capturing entire WARN_ONCE() trace with EXPECT_*(), just
3499 * the first three lines, and the last line.
3500 */
3501 EXPECT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
3502 EXPECT_BEGIN(KERN_INFO, "WARNING: <<all>>");
3503 EXPECT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
3504 EXPECT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");
3505
3506 /* refcount is now zero, this should fail */
3507 unittest(1, "/testcase-data/refcount-node is zero");
3508 of_node_put(np);
3509
3510 EXPECT_END(KERN_INFO, "---[ end trace <<int>> ]---");
3511 EXPECT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
3512 EXPECT_END(KERN_INFO, "WARNING: <<all>>");
3513 EXPECT_END(KERN_INFO, "------------[ cut here ]------------");
3514
3515 /*
3516 * Q. do we expect to get yet another warning?
3517 * A. no, the WARNING is from WARN_ONCE()
3518 */
3519 EXPECT_NOT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
3520 EXPECT_NOT_BEGIN(KERN_INFO, "WARNING: <<all>>");
3521 EXPECT_NOT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
3522 EXPECT_NOT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");
3523
3524 unittest(1, "/testcase-data/refcount-node is zero, second time");
3525 of_node_put(np);
3526
3527 EXPECT_NOT_END(KERN_INFO, "---[ end trace <<int>> ]---");
3528 EXPECT_NOT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
3529 EXPECT_NOT_END(KERN_INFO, "WARNING: <<all>>");
3530 EXPECT_NOT_END(KERN_INFO, "------------[ cut here ]------------");
3531
3532 /*
3533 * refcount of zero will trigger stack traces from any further
3534 * attempt to of_node_get() node "refcount-node". One example of
3535 * this is where of_unittest_check_node_linkage() will recursively
3536 * scan the tree, with 'for_each_child_of_node()' doing an
3537 * of_node_get() of the children of a node.
3538 *
3539 * Prevent the stack trace by removing node "refcount-node" from
3540 * its parent's child list.
3541 *
3542 * WARNING: EVIL, EVIL, EVIL:
3543 *
3544 * Directly manipulate the child list of node /testcase-data to
3545 * remove child refcount-node. This is ignoring all proper methods
3546 * of removing a child and will leak a small amount of memory.
3547 */
3548
3549 np = of_find_node_by_path(refcount_parent_path);
3550 unittest(np, "find refcount_parent_path \"%s\"\n", refcount_parent_path);
3551 unittest(np, "ERROR: devicetree live tree left in a 'bad state' if test fail\n");
3552 if (np == NULL)
3553 return;
3554
3555 prev_sibling = np->child;
3556 next_sibling = prev_sibling->sibling;
3557 if (!strcmp(prev_sibling->full_name, "refcount-node")) {
3558 np->child = next_sibling;
3559 next_sibling = next_sibling->sibling;
3560 }
3561 while (next_sibling) {
3562 if (!strcmp(next_sibling->full_name, "refcount-node"))
3563 prev_sibling->sibling = next_sibling->sibling;
3564 prev_sibling = next_sibling;
3565 next_sibling = next_sibling->sibling;
3566 }
3567 of_node_put(np);
3568
3569 return;
3570
3571out_skip_tests:
3572#endif
3573 unittest(0, "One or more lifecycle tests skipped\n");
3574}
3575
3576#ifdef CONFIG_OF_OVERLAY
3577
3578/*
3579 * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are
3580 * created by cmd_wrap_S_dtbo in scripts/Makefile.dtbs
3581 */
3582
3583#define OVERLAY_INFO_EXTERN(overlay_name) \
3584 extern uint8_t __dtbo_##overlay_name##_begin[]; \
3585 extern uint8_t __dtbo_##overlay_name##_end[]
3586
3587#define OVERLAY_INFO(overlay_name, expected, expected_remove) \
3588{ .dtbo_begin = __dtbo_##overlay_name##_begin, \
3589 .dtbo_end = __dtbo_##overlay_name##_end, \
3590 .expected_result = expected, \
3591 .expected_result_remove = expected_remove, \
3592 .name = #overlay_name, \
3593}
3594
3595struct overlay_info {
3596 uint8_t *dtbo_begin;
3597 uint8_t *dtbo_end;
3598 int expected_result;
3599 int expected_result_remove; /* if apply failed */
3600 int ovcs_id;
3601 char *name;
3602};
3603
3604OVERLAY_INFO_EXTERN(overlay_base);
3605OVERLAY_INFO_EXTERN(overlay);
3606OVERLAY_INFO_EXTERN(overlay_0);
3607OVERLAY_INFO_EXTERN(overlay_1);
3608OVERLAY_INFO_EXTERN(overlay_2);
3609OVERLAY_INFO_EXTERN(overlay_3);
3610OVERLAY_INFO_EXTERN(overlay_4);
3611OVERLAY_INFO_EXTERN(overlay_5);
3612OVERLAY_INFO_EXTERN(overlay_6);
3613OVERLAY_INFO_EXTERN(overlay_7);
3614OVERLAY_INFO_EXTERN(overlay_8);
3615OVERLAY_INFO_EXTERN(overlay_9);
3616OVERLAY_INFO_EXTERN(overlay_10);
3617OVERLAY_INFO_EXTERN(overlay_11);
3618OVERLAY_INFO_EXTERN(overlay_12);
3619OVERLAY_INFO_EXTERN(overlay_13);
3620OVERLAY_INFO_EXTERN(overlay_15);
3621OVERLAY_INFO_EXTERN(overlay_16);
3622OVERLAY_INFO_EXTERN(overlay_17);
3623OVERLAY_INFO_EXTERN(overlay_18);
3624OVERLAY_INFO_EXTERN(overlay_19);
3625OVERLAY_INFO_EXTERN(overlay_20);
3626OVERLAY_INFO_EXTERN(overlay_gpio_01);
3627OVERLAY_INFO_EXTERN(overlay_gpio_02a);
3628OVERLAY_INFO_EXTERN(overlay_gpio_02b);
3629OVERLAY_INFO_EXTERN(overlay_gpio_03);
3630OVERLAY_INFO_EXTERN(overlay_gpio_04a);
3631OVERLAY_INFO_EXTERN(overlay_gpio_04b);
3632OVERLAY_INFO_EXTERN(overlay_pci_node);
3633OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
3634OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
3635OVERLAY_INFO_EXTERN(overlay_bad_phandle);
3636OVERLAY_INFO_EXTERN(overlay_bad_symbol);
3637OVERLAY_INFO_EXTERN(overlay_bad_unresolved);
3638
3639/* entries found by name */
3640static struct overlay_info overlays[] = {
3641 OVERLAY_INFO(overlay_base, -9999, 0),
3642 OVERLAY_INFO(overlay, 0, 0),
3643 OVERLAY_INFO(overlay_0, 0, 0),
3644 OVERLAY_INFO(overlay_1, 0, 0),
3645 OVERLAY_INFO(overlay_2, 0, 0),
3646 OVERLAY_INFO(overlay_3, 0, 0),
3647 OVERLAY_INFO(overlay_4, 0, 0),
3648 OVERLAY_INFO(overlay_5, 0, 0),
3649 OVERLAY_INFO(overlay_6, 0, 0),
3650 OVERLAY_INFO(overlay_7, 0, 0),
3651 OVERLAY_INFO(overlay_8, 0, 0),
3652 OVERLAY_INFO(overlay_9, 0, 0),
3653 OVERLAY_INFO(overlay_10, 0, 0),
3654 OVERLAY_INFO(overlay_11, 0, 0),
3655 OVERLAY_INFO(overlay_12, 0, 0),
3656 OVERLAY_INFO(overlay_13, 0, 0),
3657 OVERLAY_INFO(overlay_15, 0, 0),
3658 OVERLAY_INFO(overlay_16, -EBUSY, 0),
3659 OVERLAY_INFO(overlay_17, -EEXIST, 0),
3660 OVERLAY_INFO(overlay_18, 0, 0),
3661 OVERLAY_INFO(overlay_19, 0, 0),
3662 OVERLAY_INFO(overlay_20, 0, 0),
3663 OVERLAY_INFO(overlay_gpio_01, 0, 0),
3664 OVERLAY_INFO(overlay_gpio_02a, 0, 0),
3665 OVERLAY_INFO(overlay_gpio_02b, 0, 0),
3666 OVERLAY_INFO(overlay_gpio_03, 0, 0),
3667 OVERLAY_INFO(overlay_gpio_04a, 0, 0),
3668 OVERLAY_INFO(overlay_gpio_04b, 0, 0),
3669 OVERLAY_INFO(overlay_pci_node, 0, 0),
3670 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL, -ENODEV),
3671 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL, -ENODEV),
3672 OVERLAY_INFO(overlay_bad_phandle, -EINVAL, 0),
3673 OVERLAY_INFO(overlay_bad_symbol, -EINVAL, -ENODEV),
3674 OVERLAY_INFO(overlay_bad_unresolved, -EINVAL, 0),
3675 /* end marker */
3676 { }
3677};
3678
3679static struct device_node *overlay_base_root;
3680
3681static void * __init dt_alloc_memory(u64 size, u64 align)
3682{
3683 void *ptr = memblock_alloc(size, align);
3684
3685 if (!ptr)
3686 panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
3687 __func__, size, align);
3688
3689 return ptr;
3690}
3691
3692/*
3693 * Create base device tree for the overlay unittest.
3694 *
3695 * This is called from very early boot code.
3696 *
3697 * Do as much as possible the same way as done in __unflatten_device_tree
3698 * and other early boot steps for the normal FDT so that the overlay base
3699 * unflattened tree will have the same characteristics as the real tree
3700 * (such as having memory allocated by the early allocator). The goal
3701 * is to test "the real thing" as much as possible, and test "test setup
3702 * code" as little as possible.
3703 *
3704 * Have to stop before resolving phandles, because that uses kmalloc.
3705 */
3706void __init unittest_unflatten_overlay_base(void)
3707{
3708 struct overlay_info *info;
3709 u32 data_size;
3710 void *new_fdt;
3711 u32 size;
3712 int found = 0;
3713 const char *overlay_name = "overlay_base";
3714
3715 for (info = overlays; info && info->name; info++) {
3716 if (!strcmp(overlay_name, info->name)) {
3717 found = 1;
3718 break;
3719 }
3720 }
3721 if (!found) {
3722 pr_err("no overlay data for %s\n", overlay_name);
3723 return;
3724 }
3725
3726 info = &overlays[0];
3727
3728 if (info->expected_result != -9999) {
3729 pr_err("No dtb 'overlay_base' to attach\n");
3730 return;
3731 }
3732
3733 data_size = info->dtbo_end - info->dtbo_begin;
3734 if (!data_size) {
3735 pr_err("No dtb 'overlay_base' to attach\n");
3736 return;
3737 }
3738
3739 size = fdt_totalsize(info->dtbo_begin);
3740 if (size != data_size) {
3741 pr_err("dtb 'overlay_base' header totalsize != actual size");
3742 return;
3743 }
3744
3745 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
3746 if (!new_fdt) {
3747 pr_err("alloc for dtb 'overlay_base' failed");
3748 return;
3749 }
3750
3751 memcpy(new_fdt, info->dtbo_begin, size);
3752
3753 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
3754 dt_alloc_memory, true);
3755}
3756
3757/*
3758 * The purpose of of_unittest_overlay_data_add is to add an
3759 * overlay in the normal fashion. This is a test of the whole
3760 * picture, instead of testing individual elements.
3761 *
3762 * A secondary purpose is to be able to verify that the contents of
3763 * /proc/device-tree/ contains the updated structure and values from
3764 * the overlay. That must be verified separately in user space.
3765 *
3766 * Return 0 on unexpected error.
3767 */
3768static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id)
3769{
3770 struct overlay_info *info;
3771 int passed = 1;
3772 int found = 0;
3773 int ret, ret2;
3774 u32 size;
3775
3776 for (info = overlays; info && info->name; info++) {
3777 if (!strcmp(overlay_name, info->name)) {
3778 found = 1;
3779 break;
3780 }
3781 }
3782 if (!found) {
3783 pr_err("no overlay data for %s\n", overlay_name);
3784 return 0;
3785 }
3786
3787 size = info->dtbo_end - info->dtbo_begin;
3788 if (!size)
3789 pr_err("no overlay data for %s\n", overlay_name);
3790
3791 ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id,
3792 NULL);
3793 if (ovcs_id)
3794 *ovcs_id = info->ovcs_id;
3795 if (ret < 0)
3796 goto out;
3797
3798 pr_debug("%s applied\n", overlay_name);
3799
3800out:
3801 if (ret != info->expected_result) {
3802 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
3803 info->expected_result, ret, overlay_name);
3804 passed = 0;
3805 }
3806
3807 if (ret < 0) {
3808 /* changeset may be partially applied */
3809 ret2 = of_overlay_remove(&info->ovcs_id);
3810 if (ret2 != info->expected_result_remove) {
3811 pr_err("of_overlay_remove() expected %d, ret=%d, %s\n",
3812 info->expected_result_remove, ret2,
3813 overlay_name);
3814 passed = 0;
3815 }
3816 }
3817
3818 return passed;
3819}
3820
3821/*
3822 * The purpose of of_unittest_overlay_high_level is to add an overlay
3823 * in the normal fashion. This is a test of the whole picture,
3824 * instead of individual elements.
3825 *
3826 * The first part of the function is _not_ normal overlay usage; it is
3827 * finishing splicing the base overlay device tree into the live tree.
3828 */
3829static __init void of_unittest_overlay_high_level(void)
3830{
3831 struct device_node *last_sibling;
3832 struct device_node *np;
3833 struct device_node *of_symbols;
3834 struct device_node *overlay_base_symbols;
3835 struct device_node **pprev;
3836 struct property *prop;
3837 int ret;
3838
3839 if (!overlay_base_root) {
3840 unittest(0, "overlay_base_root not initialized\n");
3841 return;
3842 }
3843
3844 /*
3845 * Could not fixup phandles in unittest_unflatten_overlay_base()
3846 * because kmalloc() was not yet available.
3847 */
3848 of_overlay_mutex_lock();
3849 of_resolve_phandles(overlay_base_root);
3850 of_overlay_mutex_unlock();
3851
3852
3853 /*
3854 * do not allow overlay_base to duplicate any node already in
3855 * tree, this greatly simplifies the code
3856 */
3857
3858 /*
3859 * remove overlay_base_root node "__local_fixups", after
3860 * being used by of_resolve_phandles()
3861 */
3862 pprev = &overlay_base_root->child;
3863 for (np = overlay_base_root->child; np; np = np->sibling) {
3864 if (of_node_name_eq(np, "__local_fixups__")) {
3865 *pprev = np->sibling;
3866 break;
3867 }
3868 pprev = &np->sibling;
3869 }
3870
3871 /* remove overlay_base_root node "__symbols__" if in live tree */
3872 of_symbols = of_get_child_by_name(of_root, "__symbols__");
3873 if (of_symbols) {
3874 /* will have to graft properties from node into live tree */
3875 pprev = &overlay_base_root->child;
3876 for (np = overlay_base_root->child; np; np = np->sibling) {
3877 if (of_node_name_eq(np, "__symbols__")) {
3878 overlay_base_symbols = np;
3879 *pprev = np->sibling;
3880 break;
3881 }
3882 pprev = &np->sibling;
3883 }
3884 }
3885
3886 for_each_child_of_node(overlay_base_root, np) {
3887 struct device_node *base_child;
3888 for_each_child_of_node(of_root, base_child) {
3889 if (!strcmp(np->full_name, base_child->full_name)) {
3890 unittest(0, "illegal node name in overlay_base %pOFn",
3891 np);
3892 of_node_put(np);
3893 of_node_put(base_child);
3894 return;
3895 }
3896 }
3897 }
3898
3899 /*
3900 * overlay 'overlay_base' is not allowed to have root
3901 * properties, so only need to splice nodes into main device tree.
3902 *
3903 * root node of *overlay_base_root will not be freed, it is lost
3904 * memory.
3905 */
3906
3907 for (np = overlay_base_root->child; np; np = np->sibling)
3908 np->parent = of_root;
3909
3910 mutex_lock(&of_mutex);
3911
3912 for (last_sibling = np = of_root->child; np; np = np->sibling)
3913 last_sibling = np;
3914
3915 if (last_sibling)
3916 last_sibling->sibling = overlay_base_root->child;
3917 else
3918 of_root->child = overlay_base_root->child;
3919
3920 for_each_of_allnodes_from(overlay_base_root, np)
3921 __of_attach_node_sysfs(np);
3922
3923 if (of_symbols) {
3924 struct property *new_prop;
3925 for_each_property_of_node(overlay_base_symbols, prop) {
3926
3927 new_prop = __of_prop_dup(prop, GFP_KERNEL);
3928 if (!new_prop) {
3929 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
3930 prop->name);
3931 goto err_unlock;
3932 }
3933 if (__of_add_property(of_symbols, new_prop)) {
3934 __of_prop_free(new_prop);
3935 /* "name" auto-generated by unflatten */
3936 if (!strcmp(prop->name, "name"))
3937 continue;
3938 unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
3939 prop->name);
3940 goto err_unlock;
3941 }
3942 if (__of_add_property_sysfs(of_symbols, new_prop)) {
3943 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
3944 prop->name);
3945 goto err_unlock;
3946 }
3947 }
3948 }
3949
3950 mutex_unlock(&of_mutex);
3951
3952
3953 /* now do the normal overlay usage test */
3954
3955 /* --- overlay --- */
3956
3957 EXPECT_BEGIN(KERN_ERR,
3958 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
3959 EXPECT_BEGIN(KERN_ERR,
3960 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
3961 EXPECT_BEGIN(KERN_ERR,
3962 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
3963 EXPECT_BEGIN(KERN_ERR,
3964 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
3965 EXPECT_BEGIN(KERN_ERR,
3966 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
3967 EXPECT_BEGIN(KERN_ERR,
3968 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
3969 EXPECT_BEGIN(KERN_ERR,
3970 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
3971 EXPECT_BEGIN(KERN_ERR,
3972 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
3973 EXPECT_BEGIN(KERN_ERR,
3974 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
3975 EXPECT_BEGIN(KERN_ERR,
3976 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
3977 EXPECT_BEGIN(KERN_ERR,
3978 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
3979
3980 ret = overlay_data_apply("overlay", NULL);
3981
3982 EXPECT_END(KERN_ERR,
3983 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
3984 EXPECT_END(KERN_ERR,
3985 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
3986 EXPECT_END(KERN_ERR,
3987 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
3988 EXPECT_END(KERN_ERR,
3989 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
3990 EXPECT_END(KERN_ERR,
3991 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
3992 EXPECT_END(KERN_ERR,
3993 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
3994 EXPECT_END(KERN_ERR,
3995 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
3996 EXPECT_END(KERN_ERR,
3997 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
3998 EXPECT_END(KERN_ERR,
3999 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
4000 EXPECT_END(KERN_ERR,
4001 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
4002 EXPECT_END(KERN_ERR,
4003 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
4004
4005 unittest(ret, "Adding overlay 'overlay' failed\n");
4006
4007 /* --- overlay_bad_add_dup_node --- */
4008
4009 EXPECT_BEGIN(KERN_ERR,
4010 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
4011 EXPECT_BEGIN(KERN_ERR,
4012 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
4013 EXPECT_BEGIN(KERN_ERR,
4014 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/controller:name");
4015 EXPECT_BEGIN(KERN_ERR,
4016 "OF: Error reverting changeset (-19)");
4017
4018 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL),
4019 "Adding overlay 'overlay_bad_add_dup_node' failed\n");
4020
4021 EXPECT_END(KERN_ERR,
4022 "OF: Error reverting changeset (-19)");
4023 EXPECT_END(KERN_ERR,
4024 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/controller:name");
4025 EXPECT_END(KERN_ERR,
4026 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
4027 EXPECT_END(KERN_ERR,
4028 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
4029
4030 /* --- overlay_bad_add_dup_prop --- */
4031
4032 EXPECT_BEGIN(KERN_ERR,
4033 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
4034 EXPECT_BEGIN(KERN_ERR,
4035 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
4036 EXPECT_BEGIN(KERN_ERR,
4037 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
4038 EXPECT_BEGIN(KERN_ERR,
4039 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/electric:name");
4040 EXPECT_BEGIN(KERN_ERR,
4041 "OF: Error reverting changeset (-19)");
4042
4043 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL),
4044 "Adding overlay 'overlay_bad_add_dup_prop' failed\n");
4045
4046 EXPECT_END(KERN_ERR,
4047 "OF: Error reverting changeset (-19)");
4048 EXPECT_END(KERN_ERR,
4049 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/electric:name");
4050 EXPECT_END(KERN_ERR,
4051 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
4052 EXPECT_END(KERN_ERR,
4053 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
4054 EXPECT_END(KERN_ERR,
4055 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
4056
4057 /* --- overlay_bad_phandle --- */
4058
4059 unittest(overlay_data_apply("overlay_bad_phandle", NULL),
4060 "Adding overlay 'overlay_bad_phandle' failed\n");
4061
4062 /* --- overlay_bad_symbol --- */
4063
4064 EXPECT_BEGIN(KERN_ERR,
4065 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/hvac-medium-2:name");
4066 EXPECT_BEGIN(KERN_ERR,
4067 "OF: Error reverting changeset (-19)");
4068
4069 unittest(overlay_data_apply("overlay_bad_symbol", NULL),
4070 "Adding overlay 'overlay_bad_symbol' failed\n");
4071
4072 EXPECT_END(KERN_ERR,
4073 "OF: Error reverting changeset (-19)");
4074 EXPECT_END(KERN_ERR,
4075 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/hvac-medium-2:name");
4076
4077 /* --- overlay_bad_unresolved --- */
4078
4079 EXPECT_BEGIN(KERN_ERR,
4080 "OF: resolver: node label 'this_label_does_not_exist' not found in live devicetree symbols table");
4081 EXPECT_BEGIN(KERN_ERR,
4082 "OF: resolver: overlay phandle fixup failed: -22");
4083
4084 unittest(overlay_data_apply("overlay_bad_unresolved", NULL),
4085 "Adding overlay 'overlay_bad_unresolved' failed\n");
4086
4087 EXPECT_END(KERN_ERR,
4088 "OF: resolver: overlay phandle fixup failed: -22");
4089 EXPECT_END(KERN_ERR,
4090 "OF: resolver: node label 'this_label_does_not_exist' not found in live devicetree symbols table");
4091
4092 return;
4093
4094err_unlock:
4095 mutex_unlock(&of_mutex);
4096}
4097
4098static int of_unittest_pci_dev_num;
4099static int of_unittest_pci_child_num;
4100
4101/*
4102 * PCI device tree node test driver
4103 */
4104static const struct pci_device_id testdrv_pci_ids[] = {
4105 { PCI_DEVICE(PCI_VENDOR_ID_REDHAT, 0x5), }, /* PCI_VENDOR_ID_REDHAT */
4106 { 0, }
4107};
4108
4109static int testdrv_probe(struct pci_dev *pdev, const struct pci_device_id *id)
4110{
4111 struct overlay_info *info;
4112 struct device_node *dn;
4113 int ret, ovcs_id;
4114 u32 size;
4115
4116 dn = pdev->dev.of_node;
4117 if (!dn) {
4118 dev_err(&pdev->dev, "does not find bus endpoint");
4119 return -EINVAL;
4120 }
4121
4122 for (info = overlays; info && info->name; info++) {
4123 if (!strcmp(info->name, "overlay_pci_node"))
4124 break;
4125 }
4126 if (!info || !info->name) {
4127 dev_err(&pdev->dev, "no overlay data for overlay_pci_node");
4128 return -ENODEV;
4129 }
4130
4131 size = info->dtbo_end - info->dtbo_begin;
4132 ret = of_overlay_fdt_apply(info->dtbo_begin, size, &ovcs_id, dn);
4133 of_node_put(dn);
4134 if (ret)
4135 return ret;
4136
4137 of_platform_default_populate(dn, NULL, &pdev->dev);
4138 pci_set_drvdata(pdev, (void *)(uintptr_t)ovcs_id);
4139
4140 return 0;
4141}
4142
4143static void testdrv_remove(struct pci_dev *pdev)
4144{
4145 int ovcs_id = (int)(uintptr_t)pci_get_drvdata(pdev);
4146
4147 of_platform_depopulate(&pdev->dev);
4148 of_overlay_remove(&ovcs_id);
4149}
4150
4151static struct pci_driver testdrv_driver = {
4152 .name = "pci_dt_testdrv",
4153 .id_table = testdrv_pci_ids,
4154 .probe = testdrv_probe,
4155 .remove = testdrv_remove,
4156};
4157
4158static int unittest_pci_probe(struct platform_device *pdev)
4159{
4160 struct resource *res;
4161 struct device *dev;
4162 u64 exp_addr;
4163
4164 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
4165 if (!res)
4166 return -ENODEV;
4167
4168 dev = &pdev->dev;
4169 while (dev && !dev_is_pci(dev))
4170 dev = dev->parent;
4171 if (!dev) {
4172 pr_err("unable to find parent device\n");
4173 return -ENODEV;
4174 }
4175
4176 exp_addr = pci_resource_start(to_pci_dev(dev), 0) + 0x100;
4177 unittest(res->start == exp_addr, "Incorrect translated address %llx, expected %llx\n",
4178 (u64)res->start, exp_addr);
4179
4180 of_unittest_pci_child_num++;
4181
4182 return 0;
4183}
4184
4185static const struct of_device_id unittest_pci_of_match[] = {
4186 { .compatible = "unittest-pci" },
4187 { }
4188};
4189
4190static struct platform_driver unittest_pci_driver = {
4191 .probe = unittest_pci_probe,
4192 .driver = {
4193 .name = "unittest-pci",
4194 .of_match_table = unittest_pci_of_match,
4195 },
4196};
4197
4198static int of_unittest_pci_node_verify(struct pci_dev *pdev, bool add)
4199{
4200 struct device_node *pnp, *np = NULL;
4201 struct device *child_dev;
4202 char *path = NULL;
4203 const __be32 *reg;
4204 int rc = 0;
4205
4206 pnp = pdev->dev.of_node;
4207 unittest(pnp, "Failed creating PCI dt node\n");
4208 if (!pnp)
4209 return -ENODEV;
4210
4211 if (add) {
4212 path = kasprintf(GFP_KERNEL, "%pOF/pci-ep-bus@0/unittest-pci@100", pnp);
4213 np = of_find_node_by_path(path);
4214 unittest(np, "Failed to get unittest-pci node under PCI node\n");
4215 if (!np) {
4216 rc = -ENODEV;
4217 goto failed;
4218 }
4219
4220 reg = of_get_property(np, "reg", NULL);
4221 unittest(reg, "Failed to get reg property\n");
4222 if (!reg)
4223 rc = -ENODEV;
4224 } else {
4225 path = kasprintf(GFP_KERNEL, "%pOF/pci-ep-bus@0", pnp);
4226 np = of_find_node_by_path(path);
4227 unittest(!np, "Child device tree node is not removed\n");
4228 child_dev = device_find_any_child(&pdev->dev);
4229 unittest(!child_dev, "Child device is not removed\n");
4230 }
4231
4232failed:
4233 kfree(path);
4234 if (np)
4235 of_node_put(np);
4236
4237 return rc;
4238}
4239
4240static void __init of_unittest_pci_node(void)
4241{
4242 struct pci_dev *pdev = NULL;
4243 int rc;
4244
4245 if (!IS_ENABLED(CONFIG_PCI_DYNAMIC_OF_NODES))
4246 return;
4247
4248 rc = pci_register_driver(&testdrv_driver);
4249 unittest(!rc, "Failed to register pci test driver; rc = %d\n", rc);
4250 if (rc)
4251 return;
4252
4253 rc = platform_driver_register(&unittest_pci_driver);
4254 if (unittest(!rc, "Failed to register unittest pci driver\n")) {
4255 pci_unregister_driver(&testdrv_driver);
4256 return;
4257 }
4258
4259 while ((pdev = pci_get_device(PCI_VENDOR_ID_REDHAT, 0x5, pdev)) != NULL) {
4260 of_unittest_pci_node_verify(pdev, true);
4261 of_unittest_pci_dev_num++;
4262 }
4263 if (pdev)
4264 pci_dev_put(pdev);
4265
4266 unittest(of_unittest_pci_dev_num,
4267 "No test PCI device been found. Please run QEMU with '-device pci-testdev'\n");
4268 unittest(of_unittest_pci_dev_num == of_unittest_pci_child_num,
4269 "Child device number %d is not expected %d", of_unittest_pci_child_num,
4270 of_unittest_pci_dev_num);
4271
4272 platform_driver_unregister(&unittest_pci_driver);
4273 pci_unregister_driver(&testdrv_driver);
4274
4275 while ((pdev = pci_get_device(PCI_VENDOR_ID_REDHAT, 0x5, pdev)) != NULL)
4276 of_unittest_pci_node_verify(pdev, false);
4277 if (pdev)
4278 pci_dev_put(pdev);
4279}
4280#else
4281
4282static inline __init void of_unittest_overlay_high_level(void) {}
4283static inline __init void of_unittest_pci_node(void) { }
4284
4285#endif
4286
4287static int __init of_unittest(void)
4288{
4289 struct device_node *np;
4290 int res;
4291
4292 pr_info("start of unittest - you will see error messages\n");
4293
4294 /* Taint the kernel so we know we've run tests. */
4295 add_taint(TAINT_TEST, LOCKDEP_STILL_OK);
4296
4297 /* adding data for unittest */
4298 res = unittest_data_add();
4299 if (res)
4300 return res;
4301 if (!of_aliases)
4302 of_aliases = of_find_node_by_path("/aliases");
4303
4304 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
4305 if (!np) {
4306 pr_info("No testcase data in device tree; not running tests\n");
4307 return 0;
4308 }
4309 of_node_put(np);
4310
4311 of_unittest_check_tree_linkage();
4312 of_unittest_check_phandles();
4313 of_unittest_find_node_by_name();
4314 of_unittest_dynamic();
4315 of_unittest_parse_phandle_with_args();
4316 of_unittest_parse_phandle_with_args_map();
4317 of_unittest_printf();
4318 of_unittest_property_string();
4319 of_unittest_property_copy();
4320 of_unittest_changeset();
4321 of_unittest_changeset_prop();
4322 of_unittest_parse_interrupts();
4323 of_unittest_parse_interrupts_extended();
4324 of_unittest_dma_get_max_cpu_address();
4325 of_unittest_parse_dma_ranges();
4326 of_unittest_pci_dma_ranges();
4327 of_unittest_pci_empty_dma_ranges();
4328 of_unittest_bus_ranges();
4329 of_unittest_bus_3cell_ranges();
4330 of_unittest_reg();
4331 of_unittest_translate_addr();
4332 of_unittest_match_node();
4333 of_unittest_platform_populate();
4334 of_unittest_overlay();
4335 of_unittest_lifecycle();
4336 of_unittest_pci_node();
4337
4338 /* Double check linkage after removing testcase data */
4339 of_unittest_check_tree_linkage();
4340
4341 of_unittest_overlay_high_level();
4342
4343 pr_info("end of unittest - %i passed, %i failed\n",
4344 unittest_results.passed, unittest_results.failed);
4345
4346 return 0;
4347}
4348late_initcall(of_unittest);
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
36static 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
80static 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
179static 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
240static int __init of_unittest_check_node_linkage(struct device_node *np)
241{
242 struct device_node *child;
243 int count = 0, rc;
244
245 for_each_child_of_node(np, child) {
246 if (child->parent != np) {
247 pr_err("Child node %pOFn links to wrong parent %pOFn\n",
248 child, np);
249 rc = -EINVAL;
250 goto put_child;
251 }
252
253 rc = of_unittest_check_node_linkage(child);
254 if (rc < 0)
255 goto put_child;
256 count += rc;
257 }
258
259 return count + 1;
260put_child:
261 of_node_put(child);
262 return rc;
263}
264
265static void __init of_unittest_check_tree_linkage(void)
266{
267 struct device_node *np;
268 int allnode_count = 0, child_count;
269
270 if (!of_root)
271 return;
272
273 for_each_of_allnodes(np)
274 allnode_count++;
275 child_count = of_unittest_check_node_linkage(of_root);
276
277 unittest(child_count > 0, "Device node data structure is corrupted\n");
278 unittest(child_count == allnode_count,
279 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
280 allnode_count, child_count);
281 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
282}
283
284static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
285 const char *expected)
286{
287 unsigned char *buf;
288 int buf_size;
289 int size, i;
290
291 buf_size = strlen(expected) + 10;
292 buf = kmalloc(buf_size, GFP_KERNEL);
293 if (!buf)
294 return;
295
296 /* Baseline; check conversion with a large size limit */
297 memset(buf, 0xff, buf_size);
298 size = snprintf(buf, buf_size - 2, fmt, np);
299
300 /* use strcmp() instead of strncmp() here to be absolutely sure strings match */
301 unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
302 "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
303 fmt, expected, buf);
304
305 /* Make sure length limits work */
306 size++;
307 for (i = 0; i < 2; i++, size--) {
308 /* Clear the buffer, and make sure it works correctly still */
309 memset(buf, 0xff, buf_size);
310 snprintf(buf, size+1, fmt, np);
311 unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
312 "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
313 size, fmt, expected, buf);
314 }
315 kfree(buf);
316}
317
318static void __init of_unittest_printf(void)
319{
320 struct device_node *np;
321 const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
322 char phandle_str[16] = "";
323
324 np = of_find_node_by_path(full_name);
325 if (!np) {
326 unittest(np, "testcase data missing\n");
327 return;
328 }
329
330 num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0);
331
332 of_unittest_printf_one(np, "%pOF", full_name);
333 of_unittest_printf_one(np, "%pOFf", full_name);
334 of_unittest_printf_one(np, "%pOFn", "dev");
335 of_unittest_printf_one(np, "%2pOFn", "dev");
336 of_unittest_printf_one(np, "%5pOFn", " dev");
337 of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device");
338 of_unittest_printf_one(np, "%pOFp", phandle_str);
339 of_unittest_printf_one(np, "%pOFP", "dev@100");
340 of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
341 of_unittest_printf_one(np, "%10pOFP", " dev@100");
342 of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
343 of_unittest_printf_one(of_root, "%pOFP", "/");
344 of_unittest_printf_one(np, "%pOFF", "----");
345 of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
346 of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
347 of_unittest_printf_one(np, "%pOFc", "test-sub-device");
348 of_unittest_printf_one(np, "%pOFC",
349 "\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
350}
351
352struct node_hash {
353 struct hlist_node node;
354 struct device_node *np;
355};
356
357static DEFINE_HASHTABLE(phandle_ht, 8);
358static void __init of_unittest_check_phandles(void)
359{
360 struct device_node *np;
361 struct node_hash *nh;
362 struct hlist_node *tmp;
363 int i, dup_count = 0, phandle_count = 0;
364
365 for_each_of_allnodes(np) {
366 if (!np->phandle)
367 continue;
368
369 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
370 if (nh->np->phandle == np->phandle) {
371 pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
372 np->phandle, nh->np, np);
373 dup_count++;
374 break;
375 }
376 }
377
378 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
379 if (!nh)
380 return;
381
382 nh->np = np;
383 hash_add(phandle_ht, &nh->node, np->phandle);
384 phandle_count++;
385 }
386 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
387 dup_count, phandle_count);
388
389 /* Clean up */
390 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
391 hash_del(&nh->node);
392 kfree(nh);
393 }
394}
395
396static void __init of_unittest_parse_phandle_with_args(void)
397{
398 struct device_node *np;
399 struct of_phandle_args args;
400 int i, rc;
401
402 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
403 if (!np) {
404 pr_err("missing testcase data\n");
405 return;
406 }
407
408 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
409 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
410
411 for (i = 0; i < 8; i++) {
412 bool passed = true;
413
414 memset(&args, 0, sizeof(args));
415 rc = of_parse_phandle_with_args(np, "phandle-list",
416 "#phandle-cells", i, &args);
417
418 /* Test the values from tests-phandle.dtsi */
419 switch (i) {
420 case 0:
421 passed &= !rc;
422 passed &= (args.args_count == 1);
423 passed &= (args.args[0] == (i + 1));
424 break;
425 case 1:
426 passed &= !rc;
427 passed &= (args.args_count == 2);
428 passed &= (args.args[0] == (i + 1));
429 passed &= (args.args[1] == 0);
430 break;
431 case 2:
432 passed &= (rc == -ENOENT);
433 break;
434 case 3:
435 passed &= !rc;
436 passed &= (args.args_count == 3);
437 passed &= (args.args[0] == (i + 1));
438 passed &= (args.args[1] == 4);
439 passed &= (args.args[2] == 3);
440 break;
441 case 4:
442 passed &= !rc;
443 passed &= (args.args_count == 2);
444 passed &= (args.args[0] == (i + 1));
445 passed &= (args.args[1] == 100);
446 break;
447 case 5:
448 passed &= !rc;
449 passed &= (args.args_count == 0);
450 break;
451 case 6:
452 passed &= !rc;
453 passed &= (args.args_count == 1);
454 passed &= (args.args[0] == (i + 1));
455 break;
456 case 7:
457 passed &= (rc == -ENOENT);
458 break;
459 default:
460 passed = false;
461 }
462
463 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
464 i, args.np, rc);
465
466 if (rc == 0)
467 of_node_put(args.np);
468 }
469
470 /* Check for missing list property */
471 memset(&args, 0, sizeof(args));
472 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
473 "#phandle-cells", 0, &args);
474 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
475 rc = of_count_phandle_with_args(np, "phandle-list-missing",
476 "#phandle-cells");
477 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
478
479 /* Check for missing cells property */
480 memset(&args, 0, sizeof(args));
481
482 EXPECT_BEGIN(KERN_INFO,
483 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
484
485 rc = of_parse_phandle_with_args(np, "phandle-list",
486 "#phandle-cells-missing", 0, &args);
487
488 EXPECT_END(KERN_INFO,
489 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
490
491 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
492
493 EXPECT_BEGIN(KERN_INFO,
494 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
495
496 rc = of_count_phandle_with_args(np, "phandle-list",
497 "#phandle-cells-missing");
498
499 EXPECT_END(KERN_INFO,
500 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
501
502 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
503
504 /* Check for bad phandle in list */
505 memset(&args, 0, sizeof(args));
506
507 EXPECT_BEGIN(KERN_INFO,
508 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
509
510 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
511 "#phandle-cells", 0, &args);
512
513 EXPECT_END(KERN_INFO,
514 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
515
516 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
517
518 EXPECT_BEGIN(KERN_INFO,
519 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
520
521 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
522 "#phandle-cells");
523
524 EXPECT_END(KERN_INFO,
525 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
526
527 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
528
529 /* Check for incorrectly formed argument list */
530 memset(&args, 0, sizeof(args));
531
532 EXPECT_BEGIN(KERN_INFO,
533 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
534
535 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
536 "#phandle-cells", 1, &args);
537
538 EXPECT_END(KERN_INFO,
539 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
540
541 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
542
543 EXPECT_BEGIN(KERN_INFO,
544 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
545
546 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
547 "#phandle-cells");
548
549 EXPECT_END(KERN_INFO,
550 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
551
552 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
553}
554
555static void __init of_unittest_parse_phandle_with_args_map(void)
556{
557 struct device_node *np, *p[6] = {};
558 struct of_phandle_args args;
559 unsigned int prefs[6];
560 int i, rc;
561
562 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
563 if (!np) {
564 pr_err("missing testcase data\n");
565 return;
566 }
567
568 p[0] = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
569 p[1] = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
570 p[2] = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
571 p[3] = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
572 p[4] = of_find_node_by_path("/testcase-data/phandle-tests/provider4");
573 p[5] = of_find_node_by_path("/testcase-data/phandle-tests/provider5");
574 for (i = 0; i < ARRAY_SIZE(p); ++i) {
575 if (!p[i]) {
576 pr_err("missing testcase data\n");
577 return;
578 }
579 prefs[i] = OF_KREF_READ(p[i]);
580 }
581
582 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
583 unittest(rc == 8, "of_count_phandle_with_args() returned %i, expected 8\n", rc);
584
585 for (i = 0; i < 9; i++) {
586 bool passed = true;
587
588 memset(&args, 0, sizeof(args));
589 rc = of_parse_phandle_with_args_map(np, "phandle-list",
590 "phandle", i, &args);
591
592 /* Test the values from tests-phandle.dtsi */
593 switch (i) {
594 case 0:
595 passed &= !rc;
596 passed &= (args.np == p[1]);
597 passed &= (args.args_count == 1);
598 passed &= (args.args[0] == 1);
599 break;
600 case 1:
601 passed &= !rc;
602 passed &= (args.np == p[3]);
603 passed &= (args.args_count == 3);
604 passed &= (args.args[0] == 2);
605 passed &= (args.args[1] == 5);
606 passed &= (args.args[2] == 3);
607 break;
608 case 2:
609 passed &= (rc == -ENOENT);
610 break;
611 case 3:
612 passed &= !rc;
613 passed &= (args.np == p[0]);
614 passed &= (args.args_count == 0);
615 break;
616 case 4:
617 passed &= !rc;
618 passed &= (args.np == p[1]);
619 passed &= (args.args_count == 1);
620 passed &= (args.args[0] == 3);
621 break;
622 case 5:
623 passed &= !rc;
624 passed &= (args.np == p[0]);
625 passed &= (args.args_count == 0);
626 break;
627 case 6:
628 passed &= !rc;
629 passed &= (args.np == p[2]);
630 passed &= (args.args_count == 2);
631 passed &= (args.args[0] == 15);
632 passed &= (args.args[1] == 0x20);
633 break;
634 case 7:
635 passed &= !rc;
636 passed &= (args.np == p[3]);
637 passed &= (args.args_count == 3);
638 passed &= (args.args[0] == 2);
639 passed &= (args.args[1] == 5);
640 passed &= (args.args[2] == 3);
641 break;
642 case 8:
643 passed &= (rc == -ENOENT);
644 break;
645 default:
646 passed = false;
647 }
648
649 unittest(passed, "index %i - data error on node %s rc=%i\n",
650 i, args.np->full_name, rc);
651
652 if (rc == 0)
653 of_node_put(args.np);
654 }
655
656 /* Check for missing list property */
657 memset(&args, 0, sizeof(args));
658 rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
659 "phandle", 0, &args);
660 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
661
662 /* Check for missing cells,map,mask property */
663 memset(&args, 0, sizeof(args));
664
665 EXPECT_BEGIN(KERN_INFO,
666 "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");
667
668 rc = of_parse_phandle_with_args_map(np, "phandle-list",
669 "phandle-missing", 0, &args);
670 EXPECT_END(KERN_INFO,
671 "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");
672
673 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
674
675 /* Check for bad phandle in list */
676 memset(&args, 0, sizeof(args));
677
678 EXPECT_BEGIN(KERN_INFO,
679 "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle 12345678");
680
681 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
682 "phandle", 0, &args);
683 EXPECT_END(KERN_INFO,
684 "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle 12345678");
685
686 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
687
688 /* Check for incorrectly formed argument list */
689 memset(&args, 0, sizeof(args));
690
691 EXPECT_BEGIN(KERN_INFO,
692 "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");
693
694 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
695 "phandle", 1, &args);
696 EXPECT_END(KERN_INFO,
697 "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");
698
699 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
700
701 for (i = 0; i < ARRAY_SIZE(p); ++i) {
702 unittest(prefs[i] == OF_KREF_READ(p[i]),
703 "provider%d: expected:%d got:%d\n",
704 i, prefs[i], OF_KREF_READ(p[i]));
705 of_node_put(p[i]);
706 }
707}
708
709static void __init of_unittest_property_string(void)
710{
711 const char *strings[4];
712 struct device_node *np;
713 int rc;
714
715 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
716 if (!np) {
717 pr_err("No testcase data in device tree\n");
718 return;
719 }
720
721 rc = of_property_match_string(np, "phandle-list-names", "first");
722 unittest(rc == 0, "first expected:0 got:%i\n", rc);
723 rc = of_property_match_string(np, "phandle-list-names", "second");
724 unittest(rc == 1, "second expected:1 got:%i\n", rc);
725 rc = of_property_match_string(np, "phandle-list-names", "third");
726 unittest(rc == 2, "third expected:2 got:%i\n", rc);
727 rc = of_property_match_string(np, "phandle-list-names", "fourth");
728 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
729 rc = of_property_match_string(np, "missing-property", "blah");
730 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
731 rc = of_property_match_string(np, "empty-property", "blah");
732 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
733 rc = of_property_match_string(np, "unterminated-string", "blah");
734 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
735
736 /* of_property_count_strings() tests */
737 rc = of_property_count_strings(np, "string-property");
738 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
739 rc = of_property_count_strings(np, "phandle-list-names");
740 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
741 rc = of_property_count_strings(np, "unterminated-string");
742 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
743 rc = of_property_count_strings(np, "unterminated-string-list");
744 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
745
746 /* of_property_read_string_index() tests */
747 rc = of_property_read_string_index(np, "string-property", 0, strings);
748 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
749 strings[0] = NULL;
750 rc = of_property_read_string_index(np, "string-property", 1, strings);
751 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
752 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
753 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
754 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
755 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
756 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
757 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
758 strings[0] = NULL;
759 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
760 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
761 strings[0] = NULL;
762 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
763 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
764 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
765 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
766 strings[0] = NULL;
767 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
768 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
769 strings[1] = NULL;
770
771 /* of_property_read_string_array() tests */
772 rc = of_property_read_string_array(np, "string-property", strings, 4);
773 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
774 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
775 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
776 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
777 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
778 /* -- An incorrectly formed string should cause a failure */
779 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
780 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
781 /* -- parsing the correctly formed strings should still work: */
782 strings[2] = NULL;
783 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
784 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
785 strings[1] = NULL;
786 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
787 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
788}
789
790#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
791 (p1)->value && (p2)->value && \
792 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
793 !strcmp((p1)->name, (p2)->name))
794static void __init of_unittest_property_copy(void)
795{
796#ifdef CONFIG_OF_DYNAMIC
797 struct property p1 = { .name = "p1", .length = 0, .value = "" };
798 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
799 struct property *new;
800
801 new = __of_prop_dup(&p1, GFP_KERNEL);
802 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
803 kfree(new->value);
804 kfree(new->name);
805 kfree(new);
806
807 new = __of_prop_dup(&p2, GFP_KERNEL);
808 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
809 kfree(new->value);
810 kfree(new->name);
811 kfree(new);
812#endif
813}
814
815static void __init of_unittest_changeset(void)
816{
817#ifdef CONFIG_OF_DYNAMIC
818 int ret;
819 struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" };
820 struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" };
821 struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" };
822 struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" };
823 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
824 struct property *ppremove;
825 struct device_node *n1, *n2, *n21, *n22, *nchangeset, *nremove, *parent, *np;
826 static const char * const str_array[] = { "str1", "str2", "str3" };
827 const u32 u32_array[] = { 1, 2, 3 };
828 struct of_changeset chgset;
829 const char *propstr = NULL;
830
831 n1 = __of_node_dup(NULL, "n1");
832 unittest(n1, "testcase setup failure\n");
833
834 n2 = __of_node_dup(NULL, "n2");
835 unittest(n2, "testcase setup failure\n");
836
837 n21 = __of_node_dup(NULL, "n21");
838 unittest(n21, "testcase setup failure %p\n", n21);
839
840 nchangeset = of_find_node_by_path("/testcase-data/changeset");
841 nremove = of_get_child_by_name(nchangeset, "node-remove");
842 unittest(nremove, "testcase setup failure\n");
843
844 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
845 unittest(ppadd, "testcase setup failure\n");
846
847 ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL);
848 unittest(ppname_n1, "testcase setup failure\n");
849
850 ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL);
851 unittest(ppname_n2, "testcase setup failure\n");
852
853 ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
854 unittest(ppname_n21, "testcase setup failure\n");
855
856 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
857 unittest(ppupdate, "testcase setup failure\n");
858
859 parent = nchangeset;
860 n1->parent = parent;
861 n2->parent = parent;
862 n21->parent = n2;
863
864 ppremove = of_find_property(parent, "prop-remove", NULL);
865 unittest(ppremove, "failed to find removal prop");
866
867 of_changeset_init(&chgset);
868
869 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
870 unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n");
871
872 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
873 unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n");
874
875 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
876 unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n");
877
878 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
879
880 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n");
881 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
882 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
883 n22 = of_changeset_create_node(&chgset, n2, "n22");
884 unittest(n22, "fail create n22\n");
885 unittest(!of_changeset_add_prop_string(&chgset, n22, "prop-str", "abcd"),
886 "fail add prop prop-str");
887 unittest(!of_changeset_add_prop_string_array(&chgset, n22, "prop-str-array",
888 (const char **)str_array,
889 ARRAY_SIZE(str_array)),
890 "fail add prop prop-str-array");
891 unittest(!of_changeset_add_prop_u32_array(&chgset, n22, "prop-u32-array",
892 u32_array, ARRAY_SIZE(u32_array)),
893 "fail add prop prop-u32-array");
894
895 unittest(!of_changeset_apply(&chgset), "apply failed\n");
896
897 of_node_put(nchangeset);
898
899 /* Make sure node names are constructed correctly */
900 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
901 "'%pOF' not added\n", n21);
902 of_node_put(np);
903 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n22")),
904 "'%pOF' not added\n", n22);
905 of_node_put(np);
906
907 unittest(!of_changeset_revert(&chgset), "revert failed\n");
908
909 unittest(!of_find_node_by_path("/testcase-data/changeset/n2/n21"),
910 "'%pOF' still present after revert\n", n21);
911
912 ppremove = of_find_property(parent, "prop-remove", NULL);
913 unittest(ppremove, "failed to find removed prop after revert\n");
914
915 ret = of_property_read_string(parent, "prop-update", &propstr);
916 unittest(!ret, "failed to find updated prop after revert\n");
917 if (!ret)
918 unittest(strcmp(propstr, "hello") == 0, "original value not in updated property after revert");
919
920 of_changeset_destroy(&chgset);
921
922 of_node_put(n1);
923 of_node_put(n2);
924 of_node_put(n21);
925 of_node_put(n22);
926#endif
927}
928
929static void __init of_unittest_dma_get_max_cpu_address(void)
930{
931 struct device_node *np;
932 phys_addr_t cpu_addr;
933
934 if (!IS_ENABLED(CONFIG_OF_ADDRESS))
935 return;
936
937 np = of_find_node_by_path("/testcase-data/address-tests");
938 if (!np) {
939 pr_err("missing testcase data\n");
940 return;
941 }
942
943 cpu_addr = of_dma_get_max_cpu_address(np);
944 unittest(cpu_addr == 0x4fffffff,
945 "of_dma_get_max_cpu_address: wrong CPU addr %pad (expecting %x)\n",
946 &cpu_addr, 0x4fffffff);
947}
948
949static void __init of_unittest_dma_ranges_one(const char *path,
950 u64 expect_dma_addr, u64 expect_paddr)
951{
952#ifdef CONFIG_HAS_DMA
953 struct device_node *np;
954 const struct bus_dma_region *map = NULL;
955 int rc;
956
957 np = of_find_node_by_path(path);
958 if (!np) {
959 pr_err("missing testcase data\n");
960 return;
961 }
962
963 rc = of_dma_get_range(np, &map);
964
965 unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc);
966
967 if (!rc) {
968 phys_addr_t paddr;
969 dma_addr_t dma_addr;
970 struct device *dev_bogus;
971
972 dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL);
973 if (!dev_bogus) {
974 unittest(0, "kzalloc() failed\n");
975 kfree(map);
976 return;
977 }
978
979 dev_bogus->dma_range_map = map;
980 paddr = dma_to_phys(dev_bogus, expect_dma_addr);
981 dma_addr = phys_to_dma(dev_bogus, expect_paddr);
982
983 unittest(paddr == expect_paddr,
984 "of_dma_get_range: wrong phys addr %pap (expecting %llx) on node %pOF\n",
985 &paddr, expect_paddr, np);
986 unittest(dma_addr == expect_dma_addr,
987 "of_dma_get_range: wrong DMA addr %pad (expecting %llx) on node %pOF\n",
988 &dma_addr, expect_dma_addr, np);
989
990 kfree(map);
991 kfree(dev_bogus);
992 }
993 of_node_put(np);
994#endif
995}
996
997static void __init of_unittest_parse_dma_ranges(void)
998{
999 of_unittest_dma_ranges_one("/testcase-data/address-tests/device@70000000",
1000 0x0, 0x20000000);
1001 if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
1002 of_unittest_dma_ranges_one("/testcase-data/address-tests/bus@80000000/device@1000",
1003 0x100000000, 0x20000000);
1004 of_unittest_dma_ranges_one("/testcase-data/address-tests/pci@90000000",
1005 0x80000000, 0x20000000);
1006}
1007
1008static void __init of_unittest_pci_dma_ranges(void)
1009{
1010 struct device_node *np;
1011 struct of_pci_range range;
1012 struct of_pci_range_parser parser;
1013 int i = 0;
1014
1015 if (!IS_ENABLED(CONFIG_PCI))
1016 return;
1017
1018 np = of_find_node_by_path("/testcase-data/address-tests/pci@90000000");
1019 if (!np) {
1020 pr_err("missing testcase data\n");
1021 return;
1022 }
1023
1024 if (of_pci_dma_range_parser_init(&parser, np)) {
1025 pr_err("missing dma-ranges property\n");
1026 return;
1027 }
1028
1029 /*
1030 * Get the dma-ranges from the device tree
1031 */
1032 for_each_of_pci_range(&parser, &range) {
1033 if (!i) {
1034 unittest(range.size == 0x10000000,
1035 "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
1036 np, range.size);
1037 unittest(range.cpu_addr == 0x20000000,
1038 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
1039 range.cpu_addr, np);
1040 unittest(range.pci_addr == 0x80000000,
1041 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
1042 range.pci_addr, np);
1043 } else {
1044 unittest(range.size == 0x10000000,
1045 "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
1046 np, range.size);
1047 unittest(range.cpu_addr == 0x40000000,
1048 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
1049 range.cpu_addr, np);
1050 unittest(range.pci_addr == 0xc0000000,
1051 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
1052 range.pci_addr, np);
1053 }
1054 i++;
1055 }
1056
1057 of_node_put(np);
1058}
1059
1060static void __init of_unittest_bus_ranges(void)
1061{
1062 struct device_node *np;
1063 struct of_range range;
1064 struct of_range_parser parser;
1065 struct resource res;
1066 int ret, count, i = 0;
1067
1068 np = of_find_node_by_path("/testcase-data/address-tests");
1069 if (!np) {
1070 pr_err("missing testcase data\n");
1071 return;
1072 }
1073
1074 if (of_range_parser_init(&parser, np)) {
1075 pr_err("missing ranges property\n");
1076 return;
1077 }
1078
1079 ret = of_range_to_resource(np, 1, &res);
1080 unittest(!ret, "of_range_to_resource returned error (%d) node %pOF\n",
1081 ret, np);
1082 unittest(resource_type(&res) == IORESOURCE_MEM,
1083 "of_range_to_resource wrong resource type on node %pOF res=%pR\n",
1084 np, &res);
1085 unittest(res.start == 0xd0000000,
1086 "of_range_to_resource wrong resource start address on node %pOF res=%pR\n",
1087 np, &res);
1088 unittest(resource_size(&res) == 0x20000000,
1089 "of_range_to_resource wrong resource start address on node %pOF res=%pR\n",
1090 np, &res);
1091
1092 count = of_range_count(&parser);
1093 unittest(count == 2,
1094 "of_range_count wrong size on node %pOF count=%d\n",
1095 np, count);
1096
1097 /*
1098 * Get the "ranges" from the device tree
1099 */
1100 for_each_of_range(&parser, &range) {
1101 unittest(range.flags == IORESOURCE_MEM,
1102 "for_each_of_range wrong flags on node %pOF flags=%x (expected %x)\n",
1103 np, range.flags, IORESOURCE_MEM);
1104 if (!i) {
1105 unittest(range.size == 0x50000000,
1106 "for_each_of_range wrong size on node %pOF size=%llx\n",
1107 np, range.size);
1108 unittest(range.cpu_addr == 0x70000000,
1109 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1110 range.cpu_addr, np);
1111 unittest(range.bus_addr == 0x70000000,
1112 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1113 range.pci_addr, np);
1114 } else {
1115 unittest(range.size == 0x20000000,
1116 "for_each_of_range wrong size on node %pOF size=%llx\n",
1117 np, range.size);
1118 unittest(range.cpu_addr == 0xd0000000,
1119 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1120 range.cpu_addr, np);
1121 unittest(range.bus_addr == 0x00000000,
1122 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1123 range.pci_addr, np);
1124 }
1125 i++;
1126 }
1127
1128 of_node_put(np);
1129}
1130
1131static void __init of_unittest_bus_3cell_ranges(void)
1132{
1133 struct device_node *np;
1134 struct of_range range;
1135 struct of_range_parser parser;
1136 int i = 0;
1137
1138 np = of_find_node_by_path("/testcase-data/address-tests/bus@a0000000");
1139 if (!np) {
1140 pr_err("missing testcase data\n");
1141 return;
1142 }
1143
1144 if (of_range_parser_init(&parser, np)) {
1145 pr_err("missing ranges property\n");
1146 return;
1147 }
1148
1149 /*
1150 * Get the "ranges" from the device tree
1151 */
1152 for_each_of_range(&parser, &range) {
1153 if (!i) {
1154 unittest(range.flags == 0xf00baa,
1155 "for_each_of_range wrong flags on node %pOF flags=%x\n",
1156 np, range.flags);
1157 unittest(range.size == 0x100000,
1158 "for_each_of_range wrong size on node %pOF size=%llx\n",
1159 np, range.size);
1160 unittest(range.cpu_addr == 0xa0000000,
1161 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1162 range.cpu_addr, np);
1163 unittest(range.bus_addr == 0x0,
1164 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1165 range.pci_addr, np);
1166 } else {
1167 unittest(range.flags == 0xf00bee,
1168 "for_each_of_range wrong flags on node %pOF flags=%x\n",
1169 np, range.flags);
1170 unittest(range.size == 0x200000,
1171 "for_each_of_range wrong size on node %pOF size=%llx\n",
1172 np, range.size);
1173 unittest(range.cpu_addr == 0xb0000000,
1174 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
1175 range.cpu_addr, np);
1176 unittest(range.bus_addr == 0x100000000,
1177 "for_each_of_range wrong bus addr (%llx) on node %pOF",
1178 range.pci_addr, np);
1179 }
1180 i++;
1181 }
1182
1183 of_node_put(np);
1184}
1185
1186static void __init of_unittest_reg(void)
1187{
1188 struct device_node *np;
1189 int ret;
1190 u64 addr, size;
1191
1192 np = of_find_node_by_path("/testcase-data/address-tests/bus@80000000/device@1000");
1193 if (!np) {
1194 pr_err("missing testcase data\n");
1195 return;
1196 }
1197
1198 ret = of_property_read_reg(np, 0, &addr, &size);
1199 unittest(!ret, "of_property_read_reg(%pOF) returned error %d\n",
1200 np, ret);
1201 unittest(addr == 0x1000, "of_property_read_reg(%pOF) untranslated address (%llx) incorrect\n",
1202 np, addr);
1203
1204 of_node_put(np);
1205}
1206
1207struct of_unittest_expected_res {
1208 int index;
1209 struct resource res;
1210};
1211
1212static void __init of_unittest_check_addr(const char *node_path,
1213 const struct of_unittest_expected_res *tab_exp,
1214 unsigned int tab_exp_count)
1215{
1216 const struct of_unittest_expected_res *expected;
1217 struct device_node *np;
1218 struct resource res;
1219 unsigned int count;
1220 int ret;
1221
1222 if (!IS_ENABLED(CONFIG_OF_ADDRESS))
1223 return;
1224
1225 np = of_find_node_by_path(node_path);
1226 if (!np) {
1227 pr_err("missing testcase data (%s)\n", node_path);
1228 return;
1229 }
1230
1231 expected = tab_exp;
1232 count = tab_exp_count;
1233 while (count--) {
1234 ret = of_address_to_resource(np, expected->index, &res);
1235 unittest(!ret, "of_address_to_resource(%pOF, %d) returned error %d\n",
1236 np, expected->index, ret);
1237 unittest(resource_type(&res) == resource_type(&expected->res) &&
1238 res.start == expected->res.start &&
1239 resource_size(&res) == resource_size(&expected->res),
1240 "of_address_to_resource(%pOF, %d) wrong resource %pR, expected %pR\n",
1241 np, expected->index, &res, &expected->res);
1242 expected++;
1243 }
1244
1245 of_node_put(np);
1246}
1247
1248static const struct of_unittest_expected_res of_unittest_reg_2cell_expected_res[] = {
1249 {.index = 0, .res = DEFINE_RES_MEM(0xa0a01000, 0x100) },
1250 {.index = 1, .res = DEFINE_RES_MEM(0xa0a02000, 0x100) },
1251 {.index = 2, .res = DEFINE_RES_MEM(0xc0c01000, 0x100) },
1252 {.index = 3, .res = DEFINE_RES_MEM(0xd0d01000, 0x100) },
1253};
1254
1255static const struct of_unittest_expected_res of_unittest_reg_3cell_expected_res[] = {
1256 {.index = 0, .res = DEFINE_RES_MEM(0xa0a01000, 0x100) },
1257 {.index = 1, .res = DEFINE_RES_MEM(0xa0b02000, 0x100) },
1258 {.index = 2, .res = DEFINE_RES_MEM(0xc0c01000, 0x100) },
1259 {.index = 3, .res = DEFINE_RES_MEM(0xc0c09000, 0x100) },
1260 {.index = 4, .res = DEFINE_RES_MEM(0xd0d01000, 0x100) },
1261};
1262
1263static const struct of_unittest_expected_res of_unittest_reg_pci_expected_res[] = {
1264 {.index = 0, .res = DEFINE_RES_MEM(0xe8001000, 0x1000) },
1265 {.index = 1, .res = DEFINE_RES_MEM(0xea002000, 0x2000) },
1266};
1267
1268static void __init of_unittest_translate_addr(void)
1269{
1270 of_unittest_check_addr("/testcase-data/address-tests2/bus-2cell@10000000/device@100000",
1271 of_unittest_reg_2cell_expected_res,
1272 ARRAY_SIZE(of_unittest_reg_2cell_expected_res));
1273
1274 of_unittest_check_addr("/testcase-data/address-tests2/bus-3cell@20000000/local-bus@100000/device@f1001000",
1275 of_unittest_reg_3cell_expected_res,
1276 ARRAY_SIZE(of_unittest_reg_3cell_expected_res));
1277
1278 of_unittest_check_addr("/testcase-data/address-tests2/pcie@d1070000/pci@0,0/dev@0,0/local-bus@0/dev@e0000000",
1279 of_unittest_reg_pci_expected_res,
1280 ARRAY_SIZE(of_unittest_reg_pci_expected_res));
1281}
1282
1283static void __init of_unittest_parse_interrupts(void)
1284{
1285 struct device_node *np;
1286 struct of_phandle_args args;
1287 int i, rc;
1288
1289 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
1290 return;
1291
1292 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
1293 if (!np) {
1294 pr_err("missing testcase data\n");
1295 return;
1296 }
1297
1298 for (i = 0; i < 4; i++) {
1299 bool passed = true;
1300
1301 memset(&args, 0, sizeof(args));
1302 rc = of_irq_parse_one(np, i, &args);
1303
1304 passed &= !rc;
1305 passed &= (args.args_count == 1);
1306 passed &= (args.args[0] == (i + 1));
1307
1308 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1309 i, args.np, rc);
1310 }
1311 of_node_put(np);
1312
1313 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
1314 if (!np) {
1315 pr_err("missing testcase data\n");
1316 return;
1317 }
1318
1319 for (i = 0; i < 4; i++) {
1320 bool passed = true;
1321
1322 memset(&args, 0, sizeof(args));
1323 rc = of_irq_parse_one(np, i, &args);
1324
1325 /* Test the values from tests-phandle.dtsi */
1326 switch (i) {
1327 case 0:
1328 passed &= !rc;
1329 passed &= (args.args_count == 1);
1330 passed &= (args.args[0] == 9);
1331 break;
1332 case 1:
1333 passed &= !rc;
1334 passed &= (args.args_count == 3);
1335 passed &= (args.args[0] == 10);
1336 passed &= (args.args[1] == 11);
1337 passed &= (args.args[2] == 12);
1338 break;
1339 case 2:
1340 passed &= !rc;
1341 passed &= (args.args_count == 2);
1342 passed &= (args.args[0] == 13);
1343 passed &= (args.args[1] == 14);
1344 break;
1345 case 3:
1346 passed &= !rc;
1347 passed &= (args.args_count == 2);
1348 passed &= (args.args[0] == 15);
1349 passed &= (args.args[1] == 16);
1350 break;
1351 default:
1352 passed = false;
1353 }
1354 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1355 i, args.np, rc);
1356 }
1357 of_node_put(np);
1358}
1359
1360static void __init of_unittest_parse_interrupts_extended(void)
1361{
1362 struct device_node *np;
1363 struct of_phandle_args args;
1364 int i, rc;
1365
1366 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
1367 return;
1368
1369 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
1370 if (!np) {
1371 pr_err("missing testcase data\n");
1372 return;
1373 }
1374
1375 for (i = 0; i < 7; i++) {
1376 bool passed = true;
1377
1378 memset(&args, 0, sizeof(args));
1379 rc = of_irq_parse_one(np, i, &args);
1380
1381 /* Test the values from tests-phandle.dtsi */
1382 switch (i) {
1383 case 0:
1384 passed &= !rc;
1385 passed &= (args.args_count == 1);
1386 passed &= (args.args[0] == 1);
1387 break;
1388 case 1:
1389 passed &= !rc;
1390 passed &= (args.args_count == 3);
1391 passed &= (args.args[0] == 2);
1392 passed &= (args.args[1] == 3);
1393 passed &= (args.args[2] == 4);
1394 break;
1395 case 2:
1396 passed &= !rc;
1397 passed &= (args.args_count == 2);
1398 passed &= (args.args[0] == 5);
1399 passed &= (args.args[1] == 6);
1400 break;
1401 case 3:
1402 passed &= !rc;
1403 passed &= (args.args_count == 1);
1404 passed &= (args.args[0] == 9);
1405 break;
1406 case 4:
1407 passed &= !rc;
1408 passed &= (args.args_count == 3);
1409 passed &= (args.args[0] == 10);
1410 passed &= (args.args[1] == 11);
1411 passed &= (args.args[2] == 12);
1412 break;
1413 case 5:
1414 passed &= !rc;
1415 passed &= (args.args_count == 2);
1416 passed &= (args.args[0] == 13);
1417 passed &= (args.args[1] == 14);
1418 break;
1419 case 6:
1420 /*
1421 * Tests child node that is missing property
1422 * #address-cells. See the comments in
1423 * drivers/of/unittest-data/tests-interrupts.dtsi
1424 * nodes intmap1 and interrupts-extended0
1425 */
1426 passed &= !rc;
1427 passed &= (args.args_count == 1);
1428 passed &= (args.args[0] == 15);
1429 break;
1430 default:
1431 passed = false;
1432 }
1433
1434 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1435 i, args.np, rc);
1436 }
1437 of_node_put(np);
1438}
1439
1440static const struct of_device_id match_node_table[] = {
1441 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
1442 { .data = "B", .type = "type1", }, /* followed by type alone */
1443
1444 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
1445 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
1446 { .data = "Cc", .name = "name2", .type = "type2", },
1447
1448 { .data = "E", .compatible = "compat3" },
1449 { .data = "G", .compatible = "compat2", },
1450 { .data = "H", .compatible = "compat2", .name = "name5", },
1451 { .data = "I", .compatible = "compat2", .type = "type1", },
1452 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
1453 { .data = "K", .compatible = "compat2", .name = "name9", },
1454 {}
1455};
1456
1457static struct {
1458 const char *path;
1459 const char *data;
1460} match_node_tests[] = {
1461 { .path = "/testcase-data/match-node/name0", .data = "A", },
1462 { .path = "/testcase-data/match-node/name1", .data = "B", },
1463 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
1464 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
1465 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
1466 { .path = "/testcase-data/match-node/name3", .data = "E", },
1467 { .path = "/testcase-data/match-node/name4", .data = "G", },
1468 { .path = "/testcase-data/match-node/name5", .data = "H", },
1469 { .path = "/testcase-data/match-node/name6", .data = "G", },
1470 { .path = "/testcase-data/match-node/name7", .data = "I", },
1471 { .path = "/testcase-data/match-node/name8", .data = "J", },
1472 { .path = "/testcase-data/match-node/name9", .data = "K", },
1473};
1474
1475static void __init of_unittest_match_node(void)
1476{
1477 struct device_node *np;
1478 const struct of_device_id *match;
1479 int i;
1480
1481 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
1482 np = of_find_node_by_path(match_node_tests[i].path);
1483 if (!np) {
1484 unittest(0, "missing testcase node %s\n",
1485 match_node_tests[i].path);
1486 continue;
1487 }
1488
1489 match = of_match_node(match_node_table, np);
1490 if (!match) {
1491 unittest(0, "%s didn't match anything\n",
1492 match_node_tests[i].path);
1493 continue;
1494 }
1495
1496 if (strcmp(match->data, match_node_tests[i].data) != 0) {
1497 unittest(0, "%s got wrong match. expected %s, got %s\n",
1498 match_node_tests[i].path, match_node_tests[i].data,
1499 (const char *)match->data);
1500 continue;
1501 }
1502 unittest(1, "passed");
1503 }
1504}
1505
1506static struct resource test_bus_res = DEFINE_RES_MEM(0xfffffff8, 2);
1507static const struct platform_device_info test_bus_info = {
1508 .name = "unittest-bus",
1509};
1510static void __init of_unittest_platform_populate(void)
1511{
1512 int irq, rc;
1513 struct device_node *np, *child, *grandchild;
1514 struct platform_device *pdev, *test_bus;
1515 const struct of_device_id match[] = {
1516 { .compatible = "test-device", },
1517 {}
1518 };
1519
1520 np = of_find_node_by_path("/testcase-data");
1521 of_platform_default_populate(np, NULL, NULL);
1522
1523 /* Test that a missing irq domain returns -EPROBE_DEFER */
1524 np = of_find_node_by_path("/testcase-data/testcase-device1");
1525 pdev = of_find_device_by_node(np);
1526 unittest(pdev, "device 1 creation failed\n");
1527
1528 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
1529 irq = platform_get_irq(pdev, 0);
1530 unittest(irq == -EPROBE_DEFER,
1531 "device deferred probe failed - %d\n", irq);
1532
1533 /* Test that a parsing failure does not return -EPROBE_DEFER */
1534 np = of_find_node_by_path("/testcase-data/testcase-device2");
1535 pdev = of_find_device_by_node(np);
1536 unittest(pdev, "device 2 creation failed\n");
1537
1538 EXPECT_BEGIN(KERN_INFO,
1539 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
1540
1541 irq = platform_get_irq(pdev, 0);
1542
1543 EXPECT_END(KERN_INFO,
1544 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
1545
1546 unittest(irq < 0 && irq != -EPROBE_DEFER,
1547 "device parsing error failed - %d\n", irq);
1548 }
1549
1550 np = of_find_node_by_path("/testcase-data/platform-tests");
1551 unittest(np, "No testcase data in device tree\n");
1552 if (!np)
1553 return;
1554
1555 test_bus = platform_device_register_full(&test_bus_info);
1556 rc = PTR_ERR_OR_ZERO(test_bus);
1557 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
1558 if (rc) {
1559 of_node_put(np);
1560 return;
1561 }
1562 test_bus->dev.of_node = np;
1563
1564 /*
1565 * Add a dummy resource to the test bus node after it is
1566 * registered to catch problems with un-inserted resources. The
1567 * DT code doesn't insert the resources, and it has caused the
1568 * kernel to oops in the past. This makes sure the same bug
1569 * doesn't crop up again.
1570 */
1571 platform_device_add_resources(test_bus, &test_bus_res, 1);
1572
1573 of_platform_populate(np, match, NULL, &test_bus->dev);
1574 for_each_child_of_node(np, child) {
1575 for_each_child_of_node(child, grandchild) {
1576 pdev = of_find_device_by_node(grandchild);
1577 unittest(pdev,
1578 "Could not create device for node '%pOFn'\n",
1579 grandchild);
1580 platform_device_put(pdev);
1581 }
1582 }
1583
1584 of_platform_depopulate(&test_bus->dev);
1585 for_each_child_of_node(np, child) {
1586 for_each_child_of_node(child, grandchild)
1587 unittest(!of_find_device_by_node(grandchild),
1588 "device didn't get destroyed '%pOFn'\n",
1589 grandchild);
1590 }
1591
1592 platform_device_unregister(test_bus);
1593 of_node_put(np);
1594}
1595
1596/**
1597 * update_node_properties - adds the properties
1598 * of np into dup node (present in live tree) and
1599 * updates parent of children of np to dup.
1600 *
1601 * @np: node whose properties are being added to the live tree
1602 * @dup: node present in live tree to be updated
1603 */
1604static void update_node_properties(struct device_node *np,
1605 struct device_node *dup)
1606{
1607 struct property *prop;
1608 struct property *save_next;
1609 struct device_node *child;
1610 int ret;
1611
1612 for_each_child_of_node(np, child)
1613 child->parent = dup;
1614
1615 /*
1616 * "unittest internal error: unable to add testdata property"
1617 *
1618 * If this message reports a property in node '/__symbols__' then
1619 * the respective unittest overlay contains a label that has the
1620 * same name as a label in the live devicetree. The label will
1621 * be in the live devicetree only if the devicetree source was
1622 * compiled with the '-@' option. If you encounter this error,
1623 * please consider renaming __all__ of the labels in the unittest
1624 * overlay dts files with an odd prefix that is unlikely to be
1625 * used in a real devicetree.
1626 */
1627
1628 /*
1629 * open code for_each_property_of_node() because of_add_property()
1630 * sets prop->next to NULL
1631 */
1632 for (prop = np->properties; prop != NULL; prop = save_next) {
1633 save_next = prop->next;
1634 ret = of_add_property(dup, prop);
1635 if (ret) {
1636 if (ret == -EEXIST && !strcmp(prop->name, "name"))
1637 continue;
1638 pr_err("unittest internal error: unable to add testdata property %pOF/%s",
1639 np, prop->name);
1640 }
1641 }
1642}
1643
1644/**
1645 * attach_node_and_children - attaches nodes
1646 * and its children to live tree.
1647 * CAUTION: misleading function name - if node @np already exists in
1648 * the live tree then children of @np are *not* attached to the live
1649 * tree. This works for the current test devicetree nodes because such
1650 * nodes do not have child nodes.
1651 *
1652 * @np: Node to attach to live tree
1653 */
1654static void attach_node_and_children(struct device_node *np)
1655{
1656 struct device_node *next, *dup, *child;
1657 unsigned long flags;
1658 const char *full_name;
1659
1660 full_name = kasprintf(GFP_KERNEL, "%pOF", np);
1661 if (!full_name)
1662 return;
1663
1664 if (!strcmp(full_name, "/__local_fixups__") ||
1665 !strcmp(full_name, "/__fixups__")) {
1666 kfree(full_name);
1667 return;
1668 }
1669
1670 dup = of_find_node_by_path(full_name);
1671 kfree(full_name);
1672 if (dup) {
1673 update_node_properties(np, dup);
1674 return;
1675 }
1676
1677 child = np->child;
1678 np->child = NULL;
1679
1680 mutex_lock(&of_mutex);
1681 raw_spin_lock_irqsave(&devtree_lock, flags);
1682 np->sibling = np->parent->child;
1683 np->parent->child = np;
1684 of_node_clear_flag(np, OF_DETACHED);
1685 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1686
1687 __of_attach_node_sysfs(np);
1688 mutex_unlock(&of_mutex);
1689
1690 while (child) {
1691 next = child->sibling;
1692 attach_node_and_children(child);
1693 child = next;
1694 }
1695}
1696
1697/**
1698 * unittest_data_add - Reads, copies data from
1699 * linked tree and attaches it to the live tree
1700 */
1701static int __init unittest_data_add(void)
1702{
1703 void *unittest_data;
1704 void *unittest_data_align;
1705 struct device_node *unittest_data_node = NULL, *np;
1706 /*
1707 * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically
1708 * created by cmd_dt_S_dtbo in scripts/Makefile.lib
1709 */
1710 extern uint8_t __dtbo_testcases_begin[];
1711 extern uint8_t __dtbo_testcases_end[];
1712 const int size = __dtbo_testcases_end - __dtbo_testcases_begin;
1713 int rc;
1714 void *ret;
1715
1716 if (!size) {
1717 pr_warn("%s: testcases is empty\n", __func__);
1718 return -ENODATA;
1719 }
1720
1721 /* creating copy */
1722 unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL);
1723 if (!unittest_data)
1724 return -ENOMEM;
1725
1726 unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE);
1727 memcpy(unittest_data_align, __dtbo_testcases_begin, size);
1728
1729 ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node);
1730 if (!ret) {
1731 pr_warn("%s: unflatten testcases tree failed\n", __func__);
1732 kfree(unittest_data);
1733 return -ENODATA;
1734 }
1735 if (!unittest_data_node) {
1736 pr_warn("%s: testcases tree is empty\n", __func__);
1737 kfree(unittest_data);
1738 return -ENODATA;
1739 }
1740
1741 /*
1742 * This lock normally encloses of_resolve_phandles()
1743 */
1744 of_overlay_mutex_lock();
1745
1746 rc = of_resolve_phandles(unittest_data_node);
1747 if (rc) {
1748 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
1749 of_overlay_mutex_unlock();
1750 return -EINVAL;
1751 }
1752
1753 if (!of_root) {
1754 of_root = unittest_data_node;
1755 for_each_of_allnodes(np)
1756 __of_attach_node_sysfs(np);
1757 of_aliases = of_find_node_by_path("/aliases");
1758 of_chosen = of_find_node_by_path("/chosen");
1759 of_overlay_mutex_unlock();
1760 return 0;
1761 }
1762
1763 EXPECT_BEGIN(KERN_INFO,
1764 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
1765
1766 /* attach the sub-tree to live tree */
1767 np = unittest_data_node->child;
1768 while (np) {
1769 struct device_node *next = np->sibling;
1770
1771 np->parent = of_root;
1772 /* this will clear OF_DETACHED in np and children */
1773 attach_node_and_children(np);
1774 np = next;
1775 }
1776
1777 EXPECT_END(KERN_INFO,
1778 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
1779
1780 of_overlay_mutex_unlock();
1781
1782 return 0;
1783}
1784
1785#ifdef CONFIG_OF_OVERLAY
1786static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id);
1787
1788static int unittest_probe(struct platform_device *pdev)
1789{
1790 struct device *dev = &pdev->dev;
1791 struct device_node *np = dev->of_node;
1792
1793 if (np == NULL) {
1794 dev_err(dev, "No OF data for device\n");
1795 return -EINVAL;
1796
1797 }
1798
1799 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1800
1801 of_platform_populate(np, NULL, NULL, &pdev->dev);
1802
1803 return 0;
1804}
1805
1806static void unittest_remove(struct platform_device *pdev)
1807{
1808 struct device *dev = &pdev->dev;
1809 struct device_node *np = dev->of_node;
1810
1811 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1812}
1813
1814static const struct of_device_id unittest_match[] = {
1815 { .compatible = "unittest", },
1816 {},
1817};
1818
1819static struct platform_driver unittest_driver = {
1820 .probe = unittest_probe,
1821 .remove_new = unittest_remove,
1822 .driver = {
1823 .name = "unittest",
1824 .of_match_table = unittest_match,
1825 },
1826};
1827
1828/* get the platform device instantiated at the path */
1829static struct platform_device *of_path_to_platform_device(const char *path)
1830{
1831 struct device_node *np;
1832 struct platform_device *pdev;
1833
1834 np = of_find_node_by_path(path);
1835 if (np == NULL)
1836 return NULL;
1837
1838 pdev = of_find_device_by_node(np);
1839 of_node_put(np);
1840
1841 return pdev;
1842}
1843
1844/* find out if a platform device exists at that path */
1845static int of_path_platform_device_exists(const char *path)
1846{
1847 struct platform_device *pdev;
1848
1849 pdev = of_path_to_platform_device(path);
1850 platform_device_put(pdev);
1851 return pdev != NULL;
1852}
1853
1854#ifdef CONFIG_OF_GPIO
1855
1856struct unittest_gpio_dev {
1857 struct gpio_chip chip;
1858};
1859
1860static int unittest_gpio_chip_request_count;
1861static int unittest_gpio_probe_count;
1862static int unittest_gpio_probe_pass_count;
1863
1864static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset)
1865{
1866 unittest_gpio_chip_request_count++;
1867
1868 pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset,
1869 unittest_gpio_chip_request_count);
1870 return 0;
1871}
1872
1873static int unittest_gpio_probe(struct platform_device *pdev)
1874{
1875 struct unittest_gpio_dev *devptr;
1876 int ret;
1877
1878 unittest_gpio_probe_count++;
1879
1880 devptr = kzalloc(sizeof(*devptr), GFP_KERNEL);
1881 if (!devptr)
1882 return -ENOMEM;
1883
1884 platform_set_drvdata(pdev, devptr);
1885
1886 devptr->chip.fwnode = dev_fwnode(&pdev->dev);
1887 devptr->chip.label = "of-unittest-gpio";
1888 devptr->chip.base = -1; /* dynamic allocation */
1889 devptr->chip.ngpio = 5;
1890 devptr->chip.request = unittest_gpio_chip_request;
1891
1892 ret = gpiochip_add_data(&devptr->chip, NULL);
1893
1894 unittest(!ret,
1895 "gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret);
1896
1897 if (!ret)
1898 unittest_gpio_probe_pass_count++;
1899 return ret;
1900}
1901
1902static void unittest_gpio_remove(struct platform_device *pdev)
1903{
1904 struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev);
1905 struct device *dev = &pdev->dev;
1906
1907 dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode);
1908
1909 if (devptr->chip.base != -1)
1910 gpiochip_remove(&devptr->chip);
1911
1912 kfree(devptr);
1913}
1914
1915static const struct of_device_id unittest_gpio_id[] = {
1916 { .compatible = "unittest-gpio", },
1917 {}
1918};
1919
1920static struct platform_driver unittest_gpio_driver = {
1921 .probe = unittest_gpio_probe,
1922 .remove_new = unittest_gpio_remove,
1923 .driver = {
1924 .name = "unittest-gpio",
1925 .of_match_table = unittest_gpio_id,
1926 },
1927};
1928
1929static void __init of_unittest_overlay_gpio(void)
1930{
1931 int chip_request_count;
1932 int probe_pass_count;
1933 int ret;
1934
1935 /*
1936 * tests: apply overlays before registering driver
1937 * Similar to installing a driver as a module, the
1938 * driver is registered after applying the overlays.
1939 *
1940 * The overlays are applied by overlay_data_apply()
1941 * instead of of_unittest_apply_overlay() so that they
1942 * will not be tracked. Thus they will not be removed
1943 * by of_unittest_remove_tracked_overlays().
1944 *
1945 * - apply overlay_gpio_01
1946 * - apply overlay_gpio_02a
1947 * - apply overlay_gpio_02b
1948 * - register driver
1949 *
1950 * register driver will result in
1951 * - probe and processing gpio hog for overlay_gpio_01
1952 * - probe for overlay_gpio_02a
1953 * - processing gpio for overlay_gpio_02b
1954 */
1955
1956 probe_pass_count = unittest_gpio_probe_pass_count;
1957 chip_request_count = unittest_gpio_chip_request_count;
1958
1959 /*
1960 * overlay_gpio_01 contains gpio node and child gpio hog node
1961 * overlay_gpio_02a contains gpio node
1962 * overlay_gpio_02b contains child gpio hog node
1963 */
1964
1965 unittest(overlay_data_apply("overlay_gpio_01", NULL),
1966 "Adding overlay 'overlay_gpio_01' failed\n");
1967
1968 unittest(overlay_data_apply("overlay_gpio_02a", NULL),
1969 "Adding overlay 'overlay_gpio_02a' failed\n");
1970
1971 unittest(overlay_data_apply("overlay_gpio_02b", NULL),
1972 "Adding overlay 'overlay_gpio_02b' failed\n");
1973
1974 ret = platform_driver_register(&unittest_gpio_driver);
1975 if (unittest(ret == 0, "could not register unittest gpio driver\n"))
1976 return;
1977
1978 unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count,
1979 "unittest_gpio_probe() failed or not called\n");
1980
1981 unittest(chip_request_count + 2 == unittest_gpio_chip_request_count,
1982 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
1983 unittest_gpio_chip_request_count - chip_request_count);
1984
1985 /*
1986 * tests: apply overlays after registering driver
1987 *
1988 * Similar to a driver built-in to the kernel, the
1989 * driver is registered before applying the overlays.
1990 *
1991 * overlay_gpio_03 contains gpio node and child gpio hog node
1992 *
1993 * - apply overlay_gpio_03
1994 *
1995 * apply overlay will result in
1996 * - probe and processing gpio hog.
1997 */
1998
1999 probe_pass_count = unittest_gpio_probe_pass_count;
2000 chip_request_count = unittest_gpio_chip_request_count;
2001
2002 /* overlay_gpio_03 contains gpio node and child gpio hog node */
2003
2004 unittest(overlay_data_apply("overlay_gpio_03", NULL),
2005 "Adding overlay 'overlay_gpio_03' failed\n");
2006
2007 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
2008 "unittest_gpio_probe() failed or not called\n");
2009
2010 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
2011 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
2012 unittest_gpio_chip_request_count - chip_request_count);
2013
2014 /*
2015 * overlay_gpio_04a contains gpio node
2016 *
2017 * - apply overlay_gpio_04a
2018 *
2019 * apply the overlay will result in
2020 * - probe for overlay_gpio_04a
2021 */
2022
2023 probe_pass_count = unittest_gpio_probe_pass_count;
2024 chip_request_count = unittest_gpio_chip_request_count;
2025
2026 /* overlay_gpio_04a contains gpio node */
2027
2028 unittest(overlay_data_apply("overlay_gpio_04a", NULL),
2029 "Adding overlay 'overlay_gpio_04a' failed\n");
2030
2031 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
2032 "unittest_gpio_probe() failed or not called\n");
2033
2034 /*
2035 * overlay_gpio_04b contains child gpio hog node
2036 *
2037 * - apply overlay_gpio_04b
2038 *
2039 * apply the overlay will result in
2040 * - processing gpio for overlay_gpio_04b
2041 */
2042
2043 /* overlay_gpio_04b contains child gpio hog node */
2044
2045 unittest(overlay_data_apply("overlay_gpio_04b", NULL),
2046 "Adding overlay 'overlay_gpio_04b' failed\n");
2047
2048 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
2049 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
2050 unittest_gpio_chip_request_count - chip_request_count);
2051}
2052
2053#else
2054
2055static void __init of_unittest_overlay_gpio(void)
2056{
2057 /* skip tests */
2058}
2059
2060#endif
2061
2062#if IS_BUILTIN(CONFIG_I2C)
2063
2064/* get the i2c client device instantiated at the path */
2065static struct i2c_client *of_path_to_i2c_client(const char *path)
2066{
2067 struct device_node *np;
2068 struct i2c_client *client;
2069
2070 np = of_find_node_by_path(path);
2071 if (np == NULL)
2072 return NULL;
2073
2074 client = of_find_i2c_device_by_node(np);
2075 of_node_put(np);
2076
2077 return client;
2078}
2079
2080/* find out if a i2c client device exists at that path */
2081static int of_path_i2c_client_exists(const char *path)
2082{
2083 struct i2c_client *client;
2084
2085 client = of_path_to_i2c_client(path);
2086 if (client)
2087 put_device(&client->dev);
2088 return client != NULL;
2089}
2090#else
2091static int of_path_i2c_client_exists(const char *path)
2092{
2093 return 0;
2094}
2095#endif
2096
2097enum overlay_type {
2098 PDEV_OVERLAY,
2099 I2C_OVERLAY
2100};
2101
2102static int of_path_device_type_exists(const char *path,
2103 enum overlay_type ovtype)
2104{
2105 switch (ovtype) {
2106 case PDEV_OVERLAY:
2107 return of_path_platform_device_exists(path);
2108 case I2C_OVERLAY:
2109 return of_path_i2c_client_exists(path);
2110 }
2111 return 0;
2112}
2113
2114static const char *unittest_path(int nr, enum overlay_type ovtype)
2115{
2116 const char *base;
2117 static char buf[256];
2118
2119 switch (ovtype) {
2120 case PDEV_OVERLAY:
2121 base = "/testcase-data/overlay-node/test-bus";
2122 break;
2123 case I2C_OVERLAY:
2124 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
2125 break;
2126 default:
2127 buf[0] = '\0';
2128 return buf;
2129 }
2130 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
2131 buf[sizeof(buf) - 1] = '\0';
2132 return buf;
2133}
2134
2135static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
2136{
2137 const char *path;
2138
2139 path = unittest_path(unittest_nr, ovtype);
2140
2141 switch (ovtype) {
2142 case PDEV_OVERLAY:
2143 return of_path_platform_device_exists(path);
2144 case I2C_OVERLAY:
2145 return of_path_i2c_client_exists(path);
2146 }
2147 return 0;
2148}
2149
2150static const char *overlay_name_from_nr(int nr)
2151{
2152 static char buf[256];
2153
2154 snprintf(buf, sizeof(buf) - 1,
2155 "overlay_%d", nr);
2156 buf[sizeof(buf) - 1] = '\0';
2157
2158 return buf;
2159}
2160
2161static const char *bus_path = "/testcase-data/overlay-node/test-bus";
2162
2163#define MAX_TRACK_OVCS_IDS 256
2164
2165static int track_ovcs_id[MAX_TRACK_OVCS_IDS];
2166static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS];
2167static int track_ovcs_id_cnt;
2168
2169static void of_unittest_track_overlay(int ovcs_id, int overlay_nr)
2170{
2171 if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS))
2172 return;
2173
2174 track_ovcs_id[track_ovcs_id_cnt] = ovcs_id;
2175 track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr;
2176 track_ovcs_id_cnt++;
2177}
2178
2179static void of_unittest_untrack_overlay(int ovcs_id)
2180{
2181 if (WARN_ON(track_ovcs_id_cnt < 1))
2182 return;
2183
2184 track_ovcs_id_cnt--;
2185
2186 /* If out of synch then test is broken. Do not try to recover. */
2187 WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id);
2188}
2189
2190static void of_unittest_remove_tracked_overlays(void)
2191{
2192 int ret, ovcs_id, overlay_nr, save_ovcs_id;
2193 const char *overlay_name;
2194
2195 while (track_ovcs_id_cnt > 0) {
2196
2197 ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1];
2198 overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1];
2199 save_ovcs_id = ovcs_id;
2200 ret = of_overlay_remove(&ovcs_id);
2201 if (ret == -ENODEV) {
2202 overlay_name = overlay_name_from_nr(overlay_nr);
2203 pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n",
2204 __func__, overlay_name, ret);
2205 }
2206 of_unittest_untrack_overlay(save_ovcs_id);
2207 }
2208
2209}
2210
2211static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id)
2212{
2213 /*
2214 * The overlay will be tracked, thus it will be removed
2215 * by of_unittest_remove_tracked_overlays().
2216 */
2217
2218 const char *overlay_name;
2219
2220 overlay_name = overlay_name_from_nr(overlay_nr);
2221
2222 if (!overlay_data_apply(overlay_name, ovcs_id)) {
2223 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2224 return -EFAULT;
2225 }
2226 of_unittest_track_overlay(*ovcs_id, overlay_nr);
2227
2228 return 0;
2229}
2230
2231static int __init __of_unittest_apply_overlay_check(int overlay_nr,
2232 int unittest_nr, int before, int after,
2233 enum overlay_type ovtype)
2234{
2235 int ret, ovcs_id;
2236
2237 /* unittest device must be in before state */
2238 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
2239 unittest(0, "%s with device @\"%s\" %s\n",
2240 overlay_name_from_nr(overlay_nr),
2241 unittest_path(unittest_nr, ovtype),
2242 !before ? "enabled" : "disabled");
2243 return -EINVAL;
2244 }
2245
2246 /* apply the overlay */
2247 ovcs_id = 0;
2248 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
2249 if (ret != 0) {
2250 /* of_unittest_apply_overlay already called unittest() */
2251 return ret;
2252 }
2253
2254 /* unittest device must be in after state */
2255 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
2256 unittest(0, "%s with device @\"%s\" %s\n",
2257 overlay_name_from_nr(overlay_nr),
2258 unittest_path(unittest_nr, ovtype),
2259 !after ? "enabled" : "disabled");
2260 return -EINVAL;
2261 }
2262
2263 return ovcs_id;
2264}
2265
2266/* apply an overlay while checking before and after states */
2267static int __init of_unittest_apply_overlay_check(int overlay_nr,
2268 int unittest_nr, int before, int after,
2269 enum overlay_type ovtype)
2270{
2271 int ovcs_id = __of_unittest_apply_overlay_check(overlay_nr,
2272 unittest_nr, before, after, ovtype);
2273 if (ovcs_id < 0)
2274 return ovcs_id;
2275
2276 return 0;
2277}
2278
2279/* apply an overlay and then revert it while checking before, after states */
2280static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
2281 int unittest_nr, int before, int after,
2282 enum overlay_type ovtype)
2283{
2284 int ret, ovcs_id, save_ovcs_id;
2285
2286 ovcs_id = __of_unittest_apply_overlay_check(overlay_nr, unittest_nr,
2287 before, after, ovtype);
2288 if (ovcs_id < 0)
2289 return ovcs_id;
2290
2291 /* remove the overlay */
2292 save_ovcs_id = ovcs_id;
2293 ret = of_overlay_remove(&ovcs_id);
2294 if (ret != 0) {
2295 unittest(0, "%s failed to be destroyed @\"%s\"\n",
2296 overlay_name_from_nr(overlay_nr),
2297 unittest_path(unittest_nr, ovtype));
2298 return ret;
2299 }
2300 of_unittest_untrack_overlay(save_ovcs_id);
2301
2302 /* unittest device must be again in before state */
2303 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
2304 unittest(0, "%s with device @\"%s\" %s\n",
2305 overlay_name_from_nr(overlay_nr),
2306 unittest_path(unittest_nr, ovtype),
2307 !before ? "enabled" : "disabled");
2308 return -EINVAL;
2309 }
2310
2311 return 0;
2312}
2313
2314/* test activation of device */
2315static void __init of_unittest_overlay_0(void)
2316{
2317 int ret;
2318
2319 EXPECT_BEGIN(KERN_INFO,
2320 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
2321
2322 /* device should enable */
2323 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
2324
2325 EXPECT_END(KERN_INFO,
2326 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
2327
2328 if (ret)
2329 return;
2330
2331 unittest(1, "overlay test %d passed\n", 0);
2332}
2333
2334/* test deactivation of device */
2335static void __init of_unittest_overlay_1(void)
2336{
2337 int ret;
2338
2339 EXPECT_BEGIN(KERN_INFO,
2340 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
2341
2342 /* device should disable */
2343 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
2344
2345 EXPECT_END(KERN_INFO,
2346 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
2347
2348 if (ret)
2349 return;
2350
2351 unittest(1, "overlay test %d passed\n", 1);
2352
2353}
2354
2355/* test activation of device */
2356static void __init of_unittest_overlay_2(void)
2357{
2358 int ret;
2359
2360 EXPECT_BEGIN(KERN_INFO,
2361 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
2362
2363 /* device should enable */
2364 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
2365
2366 EXPECT_END(KERN_INFO,
2367 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
2368
2369 if (ret)
2370 return;
2371 unittest(1, "overlay test %d passed\n", 2);
2372}
2373
2374/* test deactivation of device */
2375static void __init of_unittest_overlay_3(void)
2376{
2377 int ret;
2378
2379 EXPECT_BEGIN(KERN_INFO,
2380 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
2381
2382 /* device should disable */
2383 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
2384
2385 EXPECT_END(KERN_INFO,
2386 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
2387
2388 if (ret)
2389 return;
2390
2391 unittest(1, "overlay test %d passed\n", 3);
2392}
2393
2394/* test activation of a full device node */
2395static void __init of_unittest_overlay_4(void)
2396{
2397 /* device should disable */
2398 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
2399 return;
2400
2401 unittest(1, "overlay test %d passed\n", 4);
2402}
2403
2404/* test overlay apply/revert sequence */
2405static void __init of_unittest_overlay_5(void)
2406{
2407 int ret;
2408
2409 EXPECT_BEGIN(KERN_INFO,
2410 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
2411
2412 /* device should disable */
2413 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
2414
2415 EXPECT_END(KERN_INFO,
2416 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
2417
2418 if (ret)
2419 return;
2420
2421 unittest(1, "overlay test %d passed\n", 5);
2422}
2423
2424/* test overlay application in sequence */
2425static void __init of_unittest_overlay_6(void)
2426{
2427 int i, save_ovcs_id[2], ovcs_id;
2428 int overlay_nr = 6, unittest_nr = 6;
2429 int before = 0, after = 1;
2430 const char *overlay_name;
2431
2432 int ret;
2433
2434 /* unittest device must be in before state */
2435 for (i = 0; i < 2; i++) {
2436 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2437 != before) {
2438 unittest(0, "%s with device @\"%s\" %s\n",
2439 overlay_name_from_nr(overlay_nr + i),
2440 unittest_path(unittest_nr + i,
2441 PDEV_OVERLAY),
2442 !before ? "enabled" : "disabled");
2443 return;
2444 }
2445 }
2446
2447 /* apply the overlays */
2448
2449 EXPECT_BEGIN(KERN_INFO,
2450 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
2451
2452 overlay_name = overlay_name_from_nr(overlay_nr + 0);
2453
2454 ret = overlay_data_apply(overlay_name, &ovcs_id);
2455
2456 if (!ret) {
2457 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2458 return;
2459 }
2460 save_ovcs_id[0] = ovcs_id;
2461 of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
2462
2463 EXPECT_END(KERN_INFO,
2464 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
2465
2466 EXPECT_BEGIN(KERN_INFO,
2467 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
2468
2469 overlay_name = overlay_name_from_nr(overlay_nr + 1);
2470
2471 ret = overlay_data_apply(overlay_name, &ovcs_id);
2472
2473 if (!ret) {
2474 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2475 return;
2476 }
2477 save_ovcs_id[1] = ovcs_id;
2478 of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
2479
2480 EXPECT_END(KERN_INFO,
2481 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
2482
2483
2484 for (i = 0; i < 2; i++) {
2485 /* unittest device must be in after state */
2486 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2487 != after) {
2488 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
2489 overlay_name_from_nr(overlay_nr + i),
2490 unittest_path(unittest_nr + i,
2491 PDEV_OVERLAY),
2492 !after ? "enabled" : "disabled");
2493 return;
2494 }
2495 }
2496
2497 for (i = 1; i >= 0; i--) {
2498 ovcs_id = save_ovcs_id[i];
2499 if (of_overlay_remove(&ovcs_id)) {
2500 unittest(0, "%s failed destroy @\"%s\"\n",
2501 overlay_name_from_nr(overlay_nr + i),
2502 unittest_path(unittest_nr + i,
2503 PDEV_OVERLAY));
2504 return;
2505 }
2506 of_unittest_untrack_overlay(save_ovcs_id[i]);
2507 }
2508
2509 for (i = 0; i < 2; i++) {
2510 /* unittest device must be again in before state */
2511 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2512 != before) {
2513 unittest(0, "%s with device @\"%s\" %s\n",
2514 overlay_name_from_nr(overlay_nr + i),
2515 unittest_path(unittest_nr + i,
2516 PDEV_OVERLAY),
2517 !before ? "enabled" : "disabled");
2518 return;
2519 }
2520 }
2521
2522 unittest(1, "overlay test %d passed\n", 6);
2523
2524}
2525
2526/* test overlay application in sequence */
2527static void __init of_unittest_overlay_8(void)
2528{
2529 int i, save_ovcs_id[2], ovcs_id;
2530 int overlay_nr = 8, unittest_nr = 8;
2531 const char *overlay_name;
2532 int ret;
2533
2534 /* we don't care about device state in this test */
2535
2536 EXPECT_BEGIN(KERN_INFO,
2537 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
2538
2539 overlay_name = overlay_name_from_nr(overlay_nr + 0);
2540
2541 ret = overlay_data_apply(overlay_name, &ovcs_id);
2542 if (!ret)
2543 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2544
2545 EXPECT_END(KERN_INFO,
2546 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
2547
2548 if (!ret)
2549 return;
2550
2551 save_ovcs_id[0] = ovcs_id;
2552 of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
2553
2554 overlay_name = overlay_name_from_nr(overlay_nr + 1);
2555
2556 EXPECT_BEGIN(KERN_INFO,
2557 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
2558
2559 /* apply the overlays */
2560 ret = overlay_data_apply(overlay_name, &ovcs_id);
2561
2562 EXPECT_END(KERN_INFO,
2563 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
2564
2565 if (!ret) {
2566 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2567 return;
2568 }
2569
2570 save_ovcs_id[1] = ovcs_id;
2571 of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
2572
2573 /* now try to remove first overlay (it should fail) */
2574 ovcs_id = save_ovcs_id[0];
2575
2576 EXPECT_BEGIN(KERN_INFO,
2577 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
2578
2579 EXPECT_BEGIN(KERN_INFO,
2580 "OF: overlay: overlay #6 is not topmost");
2581
2582 ret = of_overlay_remove(&ovcs_id);
2583
2584 EXPECT_END(KERN_INFO,
2585 "OF: overlay: overlay #6 is not topmost");
2586
2587 EXPECT_END(KERN_INFO,
2588 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
2589
2590 if (!ret) {
2591 /*
2592 * Should never get here. If we do, expect a lot of
2593 * subsequent tracking and overlay removal related errors.
2594 */
2595 unittest(0, "%s was destroyed @\"%s\"\n",
2596 overlay_name_from_nr(overlay_nr + 0),
2597 unittest_path(unittest_nr,
2598 PDEV_OVERLAY));
2599 return;
2600 }
2601
2602 /* removing them in order should work */
2603 for (i = 1; i >= 0; i--) {
2604 ovcs_id = save_ovcs_id[i];
2605 if (of_overlay_remove(&ovcs_id)) {
2606 unittest(0, "%s not destroyed @\"%s\"\n",
2607 overlay_name_from_nr(overlay_nr + i),
2608 unittest_path(unittest_nr,
2609 PDEV_OVERLAY));
2610 return;
2611 }
2612 of_unittest_untrack_overlay(save_ovcs_id[i]);
2613 }
2614
2615 unittest(1, "overlay test %d passed\n", 8);
2616}
2617
2618/* test insertion of a bus with parent devices */
2619static void __init of_unittest_overlay_10(void)
2620{
2621 int ret;
2622 char *child_path;
2623
2624 /* device should disable */
2625 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
2626
2627 if (unittest(ret == 0,
2628 "overlay test %d failed; overlay application\n", 10))
2629 return;
2630
2631 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
2632 unittest_path(10, PDEV_OVERLAY));
2633 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
2634 return;
2635
2636 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
2637 kfree(child_path);
2638
2639 unittest(ret, "overlay test %d failed; no child device\n", 10);
2640}
2641
2642/* test insertion of a bus with parent devices (and revert) */
2643static void __init of_unittest_overlay_11(void)
2644{
2645 int ret;
2646
2647 /* device should disable */
2648 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
2649 PDEV_OVERLAY);
2650
2651 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
2652}
2653
2654#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
2655
2656struct unittest_i2c_bus_data {
2657 struct platform_device *pdev;
2658 struct i2c_adapter adap;
2659};
2660
2661static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
2662 struct i2c_msg *msgs, int num)
2663{
2664 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
2665
2666 (void)std;
2667
2668 return num;
2669}
2670
2671static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
2672{
2673 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
2674}
2675
2676static const struct i2c_algorithm unittest_i2c_algo = {
2677 .master_xfer = unittest_i2c_master_xfer,
2678 .functionality = unittest_i2c_functionality,
2679};
2680
2681static int unittest_i2c_bus_probe(struct platform_device *pdev)
2682{
2683 struct device *dev = &pdev->dev;
2684 struct device_node *np = dev->of_node;
2685 struct unittest_i2c_bus_data *std;
2686 struct i2c_adapter *adap;
2687 int ret;
2688
2689 if (np == NULL) {
2690 dev_err(dev, "No OF data for device\n");
2691 return -EINVAL;
2692
2693 }
2694
2695 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2696
2697 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
2698 if (!std)
2699 return -ENOMEM;
2700
2701 /* link them together */
2702 std->pdev = pdev;
2703 platform_set_drvdata(pdev, std);
2704
2705 adap = &std->adap;
2706 i2c_set_adapdata(adap, std);
2707 adap->nr = -1;
2708 strscpy(adap->name, pdev->name, sizeof(adap->name));
2709 adap->class = I2C_CLASS_DEPRECATED;
2710 adap->algo = &unittest_i2c_algo;
2711 adap->dev.parent = dev;
2712 adap->dev.of_node = dev->of_node;
2713 adap->timeout = 5 * HZ;
2714 adap->retries = 3;
2715
2716 ret = i2c_add_numbered_adapter(adap);
2717 if (ret != 0) {
2718 dev_err(dev, "Failed to add I2C adapter\n");
2719 return ret;
2720 }
2721
2722 return 0;
2723}
2724
2725static void unittest_i2c_bus_remove(struct platform_device *pdev)
2726{
2727 struct device *dev = &pdev->dev;
2728 struct device_node *np = dev->of_node;
2729 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
2730
2731 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2732 i2c_del_adapter(&std->adap);
2733}
2734
2735static const struct of_device_id unittest_i2c_bus_match[] = {
2736 { .compatible = "unittest-i2c-bus", },
2737 {},
2738};
2739
2740static struct platform_driver unittest_i2c_bus_driver = {
2741 .probe = unittest_i2c_bus_probe,
2742 .remove_new = unittest_i2c_bus_remove,
2743 .driver = {
2744 .name = "unittest-i2c-bus",
2745 .of_match_table = unittest_i2c_bus_match,
2746 },
2747};
2748
2749static int unittest_i2c_dev_probe(struct i2c_client *client)
2750{
2751 struct device *dev = &client->dev;
2752 struct device_node *np = client->dev.of_node;
2753
2754 if (!np) {
2755 dev_err(dev, "No OF node\n");
2756 return -EINVAL;
2757 }
2758
2759 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2760
2761 return 0;
2762};
2763
2764static void unittest_i2c_dev_remove(struct i2c_client *client)
2765{
2766 struct device *dev = &client->dev;
2767 struct device_node *np = client->dev.of_node;
2768
2769 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2770}
2771
2772static const struct i2c_device_id unittest_i2c_dev_id[] = {
2773 { .name = "unittest-i2c-dev" },
2774 { }
2775};
2776
2777static struct i2c_driver unittest_i2c_dev_driver = {
2778 .driver = {
2779 .name = "unittest-i2c-dev",
2780 },
2781 .probe = unittest_i2c_dev_probe,
2782 .remove = unittest_i2c_dev_remove,
2783 .id_table = unittest_i2c_dev_id,
2784};
2785
2786#if IS_BUILTIN(CONFIG_I2C_MUX)
2787
2788static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
2789{
2790 return 0;
2791}
2792
2793static int unittest_i2c_mux_probe(struct i2c_client *client)
2794{
2795 int i, nchans;
2796 struct device *dev = &client->dev;
2797 struct i2c_adapter *adap = client->adapter;
2798 struct device_node *np = client->dev.of_node, *child;
2799 struct i2c_mux_core *muxc;
2800 u32 reg, max_reg;
2801
2802 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2803
2804 if (!np) {
2805 dev_err(dev, "No OF node\n");
2806 return -EINVAL;
2807 }
2808
2809 max_reg = (u32)-1;
2810 for_each_child_of_node(np, child) {
2811 if (of_property_read_u32(child, "reg", ®))
2812 continue;
2813 if (max_reg == (u32)-1 || reg > max_reg)
2814 max_reg = reg;
2815 }
2816 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
2817 if (nchans == 0) {
2818 dev_err(dev, "No channels\n");
2819 return -EINVAL;
2820 }
2821
2822 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
2823 unittest_i2c_mux_select_chan, NULL);
2824 if (!muxc)
2825 return -ENOMEM;
2826 for (i = 0; i < nchans; i++) {
2827 if (i2c_mux_add_adapter(muxc, 0, i, 0)) {
2828 dev_err(dev, "Failed to register mux #%d\n", i);
2829 i2c_mux_del_adapters(muxc);
2830 return -ENODEV;
2831 }
2832 }
2833
2834 i2c_set_clientdata(client, muxc);
2835
2836 return 0;
2837};
2838
2839static void unittest_i2c_mux_remove(struct i2c_client *client)
2840{
2841 struct device *dev = &client->dev;
2842 struct device_node *np = client->dev.of_node;
2843 struct i2c_mux_core *muxc = i2c_get_clientdata(client);
2844
2845 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2846 i2c_mux_del_adapters(muxc);
2847}
2848
2849static const struct i2c_device_id unittest_i2c_mux_id[] = {
2850 { .name = "unittest-i2c-mux" },
2851 { }
2852};
2853
2854static struct i2c_driver unittest_i2c_mux_driver = {
2855 .driver = {
2856 .name = "unittest-i2c-mux",
2857 },
2858 .probe = unittest_i2c_mux_probe,
2859 .remove = unittest_i2c_mux_remove,
2860 .id_table = unittest_i2c_mux_id,
2861};
2862
2863#endif
2864
2865static int of_unittest_overlay_i2c_init(void)
2866{
2867 int ret;
2868
2869 ret = i2c_add_driver(&unittest_i2c_dev_driver);
2870 if (unittest(ret == 0,
2871 "could not register unittest i2c device driver\n"))
2872 return ret;
2873
2874 ret = platform_driver_register(&unittest_i2c_bus_driver);
2875
2876 if (unittest(ret == 0,
2877 "could not register unittest i2c bus driver\n"))
2878 return ret;
2879
2880#if IS_BUILTIN(CONFIG_I2C_MUX)
2881
2882 EXPECT_BEGIN(KERN_INFO,
2883 "i2c i2c-1: Added multiplexed i2c bus 2");
2884
2885 ret = i2c_add_driver(&unittest_i2c_mux_driver);
2886
2887 EXPECT_END(KERN_INFO,
2888 "i2c i2c-1: Added multiplexed i2c bus 2");
2889
2890 if (unittest(ret == 0,
2891 "could not register unittest i2c mux driver\n"))
2892 return ret;
2893#endif
2894
2895 return 0;
2896}
2897
2898static void of_unittest_overlay_i2c_cleanup(void)
2899{
2900#if IS_BUILTIN(CONFIG_I2C_MUX)
2901 i2c_del_driver(&unittest_i2c_mux_driver);
2902#endif
2903 platform_driver_unregister(&unittest_i2c_bus_driver);
2904 i2c_del_driver(&unittest_i2c_dev_driver);
2905}
2906
2907static void __init of_unittest_overlay_i2c_12(void)
2908{
2909 int ret;
2910
2911 /* device should enable */
2912 EXPECT_BEGIN(KERN_INFO,
2913 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
2914
2915 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
2916
2917 EXPECT_END(KERN_INFO,
2918 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
2919
2920 if (ret)
2921 return;
2922
2923 unittest(1, "overlay test %d passed\n", 12);
2924}
2925
2926/* test deactivation of device */
2927static void __init of_unittest_overlay_i2c_13(void)
2928{
2929 int ret;
2930
2931 EXPECT_BEGIN(KERN_INFO,
2932 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
2933
2934 /* device should disable */
2935 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
2936
2937 EXPECT_END(KERN_INFO,
2938 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
2939
2940 if (ret)
2941 return;
2942
2943 unittest(1, "overlay test %d passed\n", 13);
2944}
2945
2946/* just check for i2c mux existence */
2947static void of_unittest_overlay_i2c_14(void)
2948{
2949}
2950
2951static void __init of_unittest_overlay_i2c_15(void)
2952{
2953 int ret;
2954
2955 /* device should enable */
2956 EXPECT_BEGIN(KERN_INFO,
2957 "i2c i2c-1: Added multiplexed i2c bus 3");
2958
2959 ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY);
2960
2961 EXPECT_END(KERN_INFO,
2962 "i2c i2c-1: Added multiplexed i2c bus 3");
2963
2964 if (ret)
2965 return;
2966
2967 unittest(1, "overlay test %d passed\n", 15);
2968}
2969
2970#else
2971
2972static inline void of_unittest_overlay_i2c_14(void) { }
2973static inline void of_unittest_overlay_i2c_15(void) { }
2974
2975#endif
2976
2977static int of_notify(struct notifier_block *nb, unsigned long action,
2978 void *arg)
2979{
2980 struct of_overlay_notify_data *nd = arg;
2981 struct device_node *found;
2982 int ret;
2983
2984 /*
2985 * For overlay_16 .. overlay_19, check that returning an error
2986 * works for each of the actions by setting an arbitrary return
2987 * error number that matches the test number. e.g. for unittest16,
2988 * ret = -EBUSY which is -16.
2989 *
2990 * OVERLAY_INFO() for the overlays is declared to expect the same
2991 * error number, so overlay_data_apply() will return no error.
2992 *
2993 * overlay_20 will return NOTIFY_DONE
2994 */
2995
2996 ret = 0;
2997 of_node_get(nd->overlay);
2998
2999 switch (action) {
3000
3001 case OF_OVERLAY_PRE_APPLY:
3002 found = of_find_node_by_name(nd->overlay, "test-unittest16");
3003 if (found) {
3004 of_node_put(found);
3005 ret = -EBUSY;
3006 }
3007 break;
3008
3009 case OF_OVERLAY_POST_APPLY:
3010 found = of_find_node_by_name(nd->overlay, "test-unittest17");
3011 if (found) {
3012 of_node_put(found);
3013 ret = -EEXIST;
3014 }
3015 break;
3016
3017 case OF_OVERLAY_PRE_REMOVE:
3018 found = of_find_node_by_name(nd->overlay, "test-unittest18");
3019 if (found) {
3020 of_node_put(found);
3021 ret = -EXDEV;
3022 }
3023 break;
3024
3025 case OF_OVERLAY_POST_REMOVE:
3026 found = of_find_node_by_name(nd->overlay, "test-unittest19");
3027 if (found) {
3028 of_node_put(found);
3029 ret = -ENODEV;
3030 }
3031 break;
3032
3033 default: /* should not happen */
3034 of_node_put(nd->overlay);
3035 ret = -EINVAL;
3036 break;
3037 }
3038
3039 if (ret)
3040 return notifier_from_errno(ret);
3041
3042 return NOTIFY_DONE;
3043}
3044
3045static struct notifier_block of_nb = {
3046 .notifier_call = of_notify,
3047};
3048
3049static void __init of_unittest_overlay_notify(void)
3050{
3051 int ovcs_id;
3052 int ret;
3053
3054 ret = of_overlay_notifier_register(&of_nb);
3055 unittest(!ret,
3056 "of_overlay_notifier_register() failed, ret = %d\n", ret);
3057 if (ret)
3058 return;
3059
3060 /*
3061 * The overlays are applied by overlay_data_apply()
3062 * instead of of_unittest_apply_overlay() so that they
3063 * will not be tracked. Thus they will not be removed
3064 * by of_unittest_remove_tracked_overlays().
3065 *
3066 * Applying overlays 16 - 19 will each trigger an error for a
3067 * different action in of_notify().
3068 *
3069 * Applying overlay 20 will not trigger any error in of_notify().
3070 */
3071
3072 /* --- overlay 16 --- */
3073
3074 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
3075
3076 unittest(overlay_data_apply("overlay_16", &ovcs_id),
3077 "test OF_OVERLAY_PRE_APPLY notify injected error\n");
3078
3079 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
3080
3081 unittest(ovcs_id, "ovcs_id not created for overlay_16\n");
3082
3083 /* --- overlay 17 --- */
3084
3085 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
3086
3087 unittest(overlay_data_apply("overlay_17", &ovcs_id),
3088 "test OF_OVERLAY_POST_APPLY notify injected error\n");
3089
3090 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
3091
3092 unittest(ovcs_id, "ovcs_id not created for overlay_17\n");
3093
3094 /* --- overlay 18 --- */
3095
3096 unittest(overlay_data_apply("overlay_18", &ovcs_id),
3097 "OF_OVERLAY_PRE_REMOVE notify injected error\n");
3098
3099 unittest(ovcs_id, "ovcs_id not created for overlay_18\n");
3100
3101 if (ovcs_id) {
3102 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
3103
3104 ret = of_overlay_remove(&ovcs_id);
3105 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
3106 if (ret == -EXDEV) {
3107 /*
3108 * change set ovcs_id should still exist
3109 */
3110 unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n");
3111 } else {
3112 unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n");
3113 }
3114 } else {
3115 unittest(1, "ovcs_id not created for overlay_18\n");
3116 }
3117
3118 unittest(ovcs_id, "ovcs_id removed for overlay_18\n");
3119
3120 /* --- overlay 19 --- */
3121
3122 unittest(overlay_data_apply("overlay_19", &ovcs_id),
3123 "OF_OVERLAY_POST_REMOVE notify injected error\n");
3124
3125 unittest(ovcs_id, "ovcs_id not created for overlay_19\n");
3126
3127 if (ovcs_id) {
3128 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
3129 ret = of_overlay_remove(&ovcs_id);
3130 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
3131 if (ret == -ENODEV)
3132 unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n");
3133 else
3134 unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n");
3135 } else {
3136 unittest(1, "ovcs_id removed for overlay_19\n");
3137 }
3138
3139 unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n",
3140 ovcs_id);
3141
3142 /* --- overlay 20 --- */
3143
3144 unittest(overlay_data_apply("overlay_20", &ovcs_id),
3145 "overlay notify no injected error\n");
3146
3147 if (ovcs_id) {
3148 ret = of_overlay_remove(&ovcs_id);
3149 if (ret)
3150 unittest(1, "overlay_20 failed to be destroyed, ret = %d\n",
3151 ret);
3152 } else {
3153 unittest(1, "ovcs_id not created for overlay_20\n");
3154 }
3155
3156 unittest(!of_overlay_notifier_unregister(&of_nb),
3157 "of_overlay_notifier_unregister() failed, ret = %d\n", ret);
3158}
3159
3160static void __init of_unittest_overlay(void)
3161{
3162 struct device_node *bus_np = NULL;
3163 unsigned int i;
3164
3165 if (platform_driver_register(&unittest_driver)) {
3166 unittest(0, "could not register unittest driver\n");
3167 goto out;
3168 }
3169
3170 bus_np = of_find_node_by_path(bus_path);
3171 if (bus_np == NULL) {
3172 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
3173 goto out;
3174 }
3175
3176 if (of_platform_default_populate(bus_np, NULL, NULL)) {
3177 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
3178 goto out;
3179 }
3180
3181 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
3182 unittest(0, "could not find unittest0 @ \"%s\"\n",
3183 unittest_path(100, PDEV_OVERLAY));
3184 goto out;
3185 }
3186
3187 if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
3188 unittest(0, "unittest1 @ \"%s\" should not exist\n",
3189 unittest_path(101, PDEV_OVERLAY));
3190 goto out;
3191 }
3192
3193 unittest(1, "basic infrastructure of overlays passed");
3194
3195 /* tests in sequence */
3196 of_unittest_overlay_0();
3197 of_unittest_overlay_1();
3198 of_unittest_overlay_2();
3199 of_unittest_overlay_3();
3200 of_unittest_overlay_4();
3201 for (i = 0; i < 3; i++)
3202 of_unittest_overlay_5();
3203 of_unittest_overlay_6();
3204 of_unittest_overlay_8();
3205
3206 of_unittest_overlay_10();
3207 of_unittest_overlay_11();
3208
3209#if IS_BUILTIN(CONFIG_I2C)
3210 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
3211 goto out;
3212
3213 of_unittest_overlay_i2c_12();
3214 of_unittest_overlay_i2c_13();
3215 of_unittest_overlay_i2c_14();
3216 of_unittest_overlay_i2c_15();
3217
3218 of_unittest_overlay_i2c_cleanup();
3219#endif
3220
3221 of_unittest_overlay_gpio();
3222
3223 of_unittest_remove_tracked_overlays();
3224
3225 of_unittest_overlay_notify();
3226
3227out:
3228 of_node_put(bus_np);
3229}
3230
3231#else
3232static inline void __init of_unittest_overlay(void) { }
3233#endif
3234
3235static void __init of_unittest_lifecycle(void)
3236{
3237#ifdef CONFIG_OF_DYNAMIC
3238 unsigned int refcount;
3239 int found_refcount_one = 0;
3240 int put_count = 0;
3241 struct device_node *np;
3242 struct device_node *prev_sibling, *next_sibling;
3243 const char *refcount_path = "/testcase-data/refcount-node";
3244 const char *refcount_parent_path = "/testcase-data";
3245
3246 /*
3247 * Node lifecycle tests, non-dynamic node:
3248 *
3249 * - Decrementing refcount to zero via of_node_put() should cause the
3250 * attempt to free the node memory by of_node_release() to fail
3251 * because the node is not a dynamic node.
3252 *
3253 * - Decrementing refcount past zero should result in additional
3254 * errors reported.
3255 */
3256
3257 np = of_find_node_by_path(refcount_path);
3258 unittest(np, "find refcount_path \"%s\"\n", refcount_path);
3259 if (np == NULL)
3260 goto out_skip_tests;
3261
3262 while (!found_refcount_one) {
3263
3264 if (put_count++ > 10) {
3265 unittest(0, "guardrail to avoid infinite loop\n");
3266 goto out_skip_tests;
3267 }
3268
3269 refcount = kref_read(&np->kobj.kref);
3270 if (refcount == 1)
3271 found_refcount_one = 1;
3272 else
3273 of_node_put(np);
3274 }
3275
3276 EXPECT_BEGIN(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");
3277
3278 /*
3279 * refcount is now one, decrementing to zero will result in a call to
3280 * of_node_release() to free the node's memory, which should result
3281 * in an error
3282 */
3283 unittest(1, "/testcase-data/refcount-node is one");
3284 of_node_put(np);
3285
3286 EXPECT_END(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");
3287
3288
3289 /*
3290 * expect stack trace for subsequent of_node_put():
3291 * __refcount_sub_and_test() calls:
3292 * refcount_warn_saturate(r, REFCOUNT_SUB_UAF)
3293 *
3294 * Not capturing entire WARN_ONCE() trace with EXPECT_*(), just
3295 * the first three lines, and the last line.
3296 */
3297 EXPECT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
3298 EXPECT_BEGIN(KERN_INFO, "WARNING: <<all>>");
3299 EXPECT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
3300 EXPECT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");
3301
3302 /* refcount is now zero, this should fail */
3303 unittest(1, "/testcase-data/refcount-node is zero");
3304 of_node_put(np);
3305
3306 EXPECT_END(KERN_INFO, "---[ end trace <<int>> ]---");
3307 EXPECT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
3308 EXPECT_END(KERN_INFO, "WARNING: <<all>>");
3309 EXPECT_END(KERN_INFO, "------------[ cut here ]------------");
3310
3311 /*
3312 * Q. do we expect to get yet another warning?
3313 * A. no, the WARNING is from WARN_ONCE()
3314 */
3315 EXPECT_NOT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
3316 EXPECT_NOT_BEGIN(KERN_INFO, "WARNING: <<all>>");
3317 EXPECT_NOT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
3318 EXPECT_NOT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");
3319
3320 unittest(1, "/testcase-data/refcount-node is zero, second time");
3321 of_node_put(np);
3322
3323 EXPECT_NOT_END(KERN_INFO, "---[ end trace <<int>> ]---");
3324 EXPECT_NOT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
3325 EXPECT_NOT_END(KERN_INFO, "WARNING: <<all>>");
3326 EXPECT_NOT_END(KERN_INFO, "------------[ cut here ]------------");
3327
3328 /*
3329 * refcount of zero will trigger stack traces from any further
3330 * attempt to of_node_get() node "refcount-node". One example of
3331 * this is where of_unittest_check_node_linkage() will recursively
3332 * scan the tree, with 'for_each_child_of_node()' doing an
3333 * of_node_get() of the children of a node.
3334 *
3335 * Prevent the stack trace by removing node "refcount-node" from
3336 * its parent's child list.
3337 *
3338 * WARNING: EVIL, EVIL, EVIL:
3339 *
3340 * Directly manipulate the child list of node /testcase-data to
3341 * remove child refcount-node. This is ignoring all proper methods
3342 * of removing a child and will leak a small amount of memory.
3343 */
3344
3345 np = of_find_node_by_path(refcount_parent_path);
3346 unittest(np, "find refcount_parent_path \"%s\"\n", refcount_parent_path);
3347 unittest(np, "ERROR: devicetree live tree left in a 'bad state' if test fail\n");
3348 if (np == NULL)
3349 return;
3350
3351 prev_sibling = np->child;
3352 next_sibling = prev_sibling->sibling;
3353 if (!strcmp(prev_sibling->full_name, "refcount-node")) {
3354 np->child = next_sibling;
3355 next_sibling = next_sibling->sibling;
3356 }
3357 while (next_sibling) {
3358 if (!strcmp(next_sibling->full_name, "refcount-node"))
3359 prev_sibling->sibling = next_sibling->sibling;
3360 prev_sibling = next_sibling;
3361 next_sibling = next_sibling->sibling;
3362 }
3363 of_node_put(np);
3364
3365 return;
3366
3367out_skip_tests:
3368#endif
3369 unittest(0, "One or more lifecycle tests skipped\n");
3370}
3371
3372#ifdef CONFIG_OF_OVERLAY
3373
3374/*
3375 * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are
3376 * created by cmd_dt_S_dtbo in scripts/Makefile.lib
3377 */
3378
3379#define OVERLAY_INFO_EXTERN(overlay_name) \
3380 extern uint8_t __dtbo_##overlay_name##_begin[]; \
3381 extern uint8_t __dtbo_##overlay_name##_end[]
3382
3383#define OVERLAY_INFO(overlay_name, expected, expected_remove) \
3384{ .dtbo_begin = __dtbo_##overlay_name##_begin, \
3385 .dtbo_end = __dtbo_##overlay_name##_end, \
3386 .expected_result = expected, \
3387 .expected_result_remove = expected_remove, \
3388 .name = #overlay_name, \
3389}
3390
3391struct overlay_info {
3392 uint8_t *dtbo_begin;
3393 uint8_t *dtbo_end;
3394 int expected_result;
3395 int expected_result_remove; /* if apply failed */
3396 int ovcs_id;
3397 char *name;
3398};
3399
3400OVERLAY_INFO_EXTERN(overlay_base);
3401OVERLAY_INFO_EXTERN(overlay);
3402OVERLAY_INFO_EXTERN(overlay_0);
3403OVERLAY_INFO_EXTERN(overlay_1);
3404OVERLAY_INFO_EXTERN(overlay_2);
3405OVERLAY_INFO_EXTERN(overlay_3);
3406OVERLAY_INFO_EXTERN(overlay_4);
3407OVERLAY_INFO_EXTERN(overlay_5);
3408OVERLAY_INFO_EXTERN(overlay_6);
3409OVERLAY_INFO_EXTERN(overlay_7);
3410OVERLAY_INFO_EXTERN(overlay_8);
3411OVERLAY_INFO_EXTERN(overlay_9);
3412OVERLAY_INFO_EXTERN(overlay_10);
3413OVERLAY_INFO_EXTERN(overlay_11);
3414OVERLAY_INFO_EXTERN(overlay_12);
3415OVERLAY_INFO_EXTERN(overlay_13);
3416OVERLAY_INFO_EXTERN(overlay_15);
3417OVERLAY_INFO_EXTERN(overlay_16);
3418OVERLAY_INFO_EXTERN(overlay_17);
3419OVERLAY_INFO_EXTERN(overlay_18);
3420OVERLAY_INFO_EXTERN(overlay_19);
3421OVERLAY_INFO_EXTERN(overlay_20);
3422OVERLAY_INFO_EXTERN(overlay_gpio_01);
3423OVERLAY_INFO_EXTERN(overlay_gpio_02a);
3424OVERLAY_INFO_EXTERN(overlay_gpio_02b);
3425OVERLAY_INFO_EXTERN(overlay_gpio_03);
3426OVERLAY_INFO_EXTERN(overlay_gpio_04a);
3427OVERLAY_INFO_EXTERN(overlay_gpio_04b);
3428OVERLAY_INFO_EXTERN(overlay_pci_node);
3429OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
3430OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
3431OVERLAY_INFO_EXTERN(overlay_bad_phandle);
3432OVERLAY_INFO_EXTERN(overlay_bad_symbol);
3433OVERLAY_INFO_EXTERN(overlay_bad_unresolved);
3434
3435/* entries found by name */
3436static struct overlay_info overlays[] = {
3437 OVERLAY_INFO(overlay_base, -9999, 0),
3438 OVERLAY_INFO(overlay, 0, 0),
3439 OVERLAY_INFO(overlay_0, 0, 0),
3440 OVERLAY_INFO(overlay_1, 0, 0),
3441 OVERLAY_INFO(overlay_2, 0, 0),
3442 OVERLAY_INFO(overlay_3, 0, 0),
3443 OVERLAY_INFO(overlay_4, 0, 0),
3444 OVERLAY_INFO(overlay_5, 0, 0),
3445 OVERLAY_INFO(overlay_6, 0, 0),
3446 OVERLAY_INFO(overlay_7, 0, 0),
3447 OVERLAY_INFO(overlay_8, 0, 0),
3448 OVERLAY_INFO(overlay_9, 0, 0),
3449 OVERLAY_INFO(overlay_10, 0, 0),
3450 OVERLAY_INFO(overlay_11, 0, 0),
3451 OVERLAY_INFO(overlay_12, 0, 0),
3452 OVERLAY_INFO(overlay_13, 0, 0),
3453 OVERLAY_INFO(overlay_15, 0, 0),
3454 OVERLAY_INFO(overlay_16, -EBUSY, 0),
3455 OVERLAY_INFO(overlay_17, -EEXIST, 0),
3456 OVERLAY_INFO(overlay_18, 0, 0),
3457 OVERLAY_INFO(overlay_19, 0, 0),
3458 OVERLAY_INFO(overlay_20, 0, 0),
3459 OVERLAY_INFO(overlay_gpio_01, 0, 0),
3460 OVERLAY_INFO(overlay_gpio_02a, 0, 0),
3461 OVERLAY_INFO(overlay_gpio_02b, 0, 0),
3462 OVERLAY_INFO(overlay_gpio_03, 0, 0),
3463 OVERLAY_INFO(overlay_gpio_04a, 0, 0),
3464 OVERLAY_INFO(overlay_gpio_04b, 0, 0),
3465 OVERLAY_INFO(overlay_pci_node, 0, 0),
3466 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL, -ENODEV),
3467 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL, -ENODEV),
3468 OVERLAY_INFO(overlay_bad_phandle, -EINVAL, 0),
3469 OVERLAY_INFO(overlay_bad_symbol, -EINVAL, -ENODEV),
3470 OVERLAY_INFO(overlay_bad_unresolved, -EINVAL, 0),
3471 /* end marker */
3472 { }
3473};
3474
3475static struct device_node *overlay_base_root;
3476
3477static void * __init dt_alloc_memory(u64 size, u64 align)
3478{
3479 void *ptr = memblock_alloc(size, align);
3480
3481 if (!ptr)
3482 panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
3483 __func__, size, align);
3484
3485 return ptr;
3486}
3487
3488/*
3489 * Create base device tree for the overlay unittest.
3490 *
3491 * This is called from very early boot code.
3492 *
3493 * Do as much as possible the same way as done in __unflatten_device_tree
3494 * and other early boot steps for the normal FDT so that the overlay base
3495 * unflattened tree will have the same characteristics as the real tree
3496 * (such as having memory allocated by the early allocator). The goal
3497 * is to test "the real thing" as much as possible, and test "test setup
3498 * code" as little as possible.
3499 *
3500 * Have to stop before resolving phandles, because that uses kmalloc.
3501 */
3502void __init unittest_unflatten_overlay_base(void)
3503{
3504 struct overlay_info *info;
3505 u32 data_size;
3506 void *new_fdt;
3507 u32 size;
3508 int found = 0;
3509 const char *overlay_name = "overlay_base";
3510
3511 for (info = overlays; info && info->name; info++) {
3512 if (!strcmp(overlay_name, info->name)) {
3513 found = 1;
3514 break;
3515 }
3516 }
3517 if (!found) {
3518 pr_err("no overlay data for %s\n", overlay_name);
3519 return;
3520 }
3521
3522 info = &overlays[0];
3523
3524 if (info->expected_result != -9999) {
3525 pr_err("No dtb 'overlay_base' to attach\n");
3526 return;
3527 }
3528
3529 data_size = info->dtbo_end - info->dtbo_begin;
3530 if (!data_size) {
3531 pr_err("No dtb 'overlay_base' to attach\n");
3532 return;
3533 }
3534
3535 size = fdt_totalsize(info->dtbo_begin);
3536 if (size != data_size) {
3537 pr_err("dtb 'overlay_base' header totalsize != actual size");
3538 return;
3539 }
3540
3541 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
3542 if (!new_fdt) {
3543 pr_err("alloc for dtb 'overlay_base' failed");
3544 return;
3545 }
3546
3547 memcpy(new_fdt, info->dtbo_begin, size);
3548
3549 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
3550 dt_alloc_memory, true);
3551}
3552
3553/*
3554 * The purpose of of_unittest_overlay_data_add is to add an
3555 * overlay in the normal fashion. This is a test of the whole
3556 * picture, instead of testing individual elements.
3557 *
3558 * A secondary purpose is to be able to verify that the contents of
3559 * /proc/device-tree/ contains the updated structure and values from
3560 * the overlay. That must be verified separately in user space.
3561 *
3562 * Return 0 on unexpected error.
3563 */
3564static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id)
3565{
3566 struct overlay_info *info;
3567 int passed = 1;
3568 int found = 0;
3569 int ret, ret2;
3570 u32 size;
3571
3572 for (info = overlays; info && info->name; info++) {
3573 if (!strcmp(overlay_name, info->name)) {
3574 found = 1;
3575 break;
3576 }
3577 }
3578 if (!found) {
3579 pr_err("no overlay data for %s\n", overlay_name);
3580 return 0;
3581 }
3582
3583 size = info->dtbo_end - info->dtbo_begin;
3584 if (!size)
3585 pr_err("no overlay data for %s\n", overlay_name);
3586
3587 ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id,
3588 NULL);
3589 if (ovcs_id)
3590 *ovcs_id = info->ovcs_id;
3591 if (ret < 0)
3592 goto out;
3593
3594 pr_debug("%s applied\n", overlay_name);
3595
3596out:
3597 if (ret != info->expected_result) {
3598 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
3599 info->expected_result, ret, overlay_name);
3600 passed = 0;
3601 }
3602
3603 if (ret < 0) {
3604 /* changeset may be partially applied */
3605 ret2 = of_overlay_remove(&info->ovcs_id);
3606 if (ret2 != info->expected_result_remove) {
3607 pr_err("of_overlay_remove() expected %d, ret=%d, %s\n",
3608 info->expected_result_remove, ret2,
3609 overlay_name);
3610 passed = 0;
3611 }
3612 }
3613
3614 return passed;
3615}
3616
3617/*
3618 * The purpose of of_unittest_overlay_high_level is to add an overlay
3619 * in the normal fashion. This is a test of the whole picture,
3620 * instead of individual elements.
3621 *
3622 * The first part of the function is _not_ normal overlay usage; it is
3623 * finishing splicing the base overlay device tree into the live tree.
3624 */
3625static __init void of_unittest_overlay_high_level(void)
3626{
3627 struct device_node *last_sibling;
3628 struct device_node *np;
3629 struct device_node *of_symbols;
3630 struct device_node *overlay_base_symbols;
3631 struct device_node **pprev;
3632 struct property *prop;
3633 int ret;
3634
3635 if (!overlay_base_root) {
3636 unittest(0, "overlay_base_root not initialized\n");
3637 return;
3638 }
3639
3640 /*
3641 * Could not fixup phandles in unittest_unflatten_overlay_base()
3642 * because kmalloc() was not yet available.
3643 */
3644 of_overlay_mutex_lock();
3645 of_resolve_phandles(overlay_base_root);
3646 of_overlay_mutex_unlock();
3647
3648
3649 /*
3650 * do not allow overlay_base to duplicate any node already in
3651 * tree, this greatly simplifies the code
3652 */
3653
3654 /*
3655 * remove overlay_base_root node "__local_fixups", after
3656 * being used by of_resolve_phandles()
3657 */
3658 pprev = &overlay_base_root->child;
3659 for (np = overlay_base_root->child; np; np = np->sibling) {
3660 if (of_node_name_eq(np, "__local_fixups__")) {
3661 *pprev = np->sibling;
3662 break;
3663 }
3664 pprev = &np->sibling;
3665 }
3666
3667 /* remove overlay_base_root node "__symbols__" if in live tree */
3668 of_symbols = of_get_child_by_name(of_root, "__symbols__");
3669 if (of_symbols) {
3670 /* will have to graft properties from node into live tree */
3671 pprev = &overlay_base_root->child;
3672 for (np = overlay_base_root->child; np; np = np->sibling) {
3673 if (of_node_name_eq(np, "__symbols__")) {
3674 overlay_base_symbols = np;
3675 *pprev = np->sibling;
3676 break;
3677 }
3678 pprev = &np->sibling;
3679 }
3680 }
3681
3682 for_each_child_of_node(overlay_base_root, np) {
3683 struct device_node *base_child;
3684 for_each_child_of_node(of_root, base_child) {
3685 if (!strcmp(np->full_name, base_child->full_name)) {
3686 unittest(0, "illegal node name in overlay_base %pOFn",
3687 np);
3688 of_node_put(np);
3689 of_node_put(base_child);
3690 return;
3691 }
3692 }
3693 }
3694
3695 /*
3696 * overlay 'overlay_base' is not allowed to have root
3697 * properties, so only need to splice nodes into main device tree.
3698 *
3699 * root node of *overlay_base_root will not be freed, it is lost
3700 * memory.
3701 */
3702
3703 for (np = overlay_base_root->child; np; np = np->sibling)
3704 np->parent = of_root;
3705
3706 mutex_lock(&of_mutex);
3707
3708 for (last_sibling = np = of_root->child; np; np = np->sibling)
3709 last_sibling = np;
3710
3711 if (last_sibling)
3712 last_sibling->sibling = overlay_base_root->child;
3713 else
3714 of_root->child = overlay_base_root->child;
3715
3716 for_each_of_allnodes_from(overlay_base_root, np)
3717 __of_attach_node_sysfs(np);
3718
3719 if (of_symbols) {
3720 struct property *new_prop;
3721 for_each_property_of_node(overlay_base_symbols, prop) {
3722
3723 new_prop = __of_prop_dup(prop, GFP_KERNEL);
3724 if (!new_prop) {
3725 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
3726 prop->name);
3727 goto err_unlock;
3728 }
3729 if (__of_add_property(of_symbols, new_prop)) {
3730 kfree(new_prop->name);
3731 kfree(new_prop->value);
3732 kfree(new_prop);
3733 /* "name" auto-generated by unflatten */
3734 if (!strcmp(prop->name, "name"))
3735 continue;
3736 unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
3737 prop->name);
3738 goto err_unlock;
3739 }
3740 if (__of_add_property_sysfs(of_symbols, new_prop)) {
3741 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
3742 prop->name);
3743 goto err_unlock;
3744 }
3745 }
3746 }
3747
3748 mutex_unlock(&of_mutex);
3749
3750
3751 /* now do the normal overlay usage test */
3752
3753 /* --- overlay --- */
3754
3755 EXPECT_BEGIN(KERN_ERR,
3756 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
3757 EXPECT_BEGIN(KERN_ERR,
3758 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
3759 EXPECT_BEGIN(KERN_ERR,
3760 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
3761 EXPECT_BEGIN(KERN_ERR,
3762 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
3763 EXPECT_BEGIN(KERN_ERR,
3764 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
3765 EXPECT_BEGIN(KERN_ERR,
3766 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
3767 EXPECT_BEGIN(KERN_ERR,
3768 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
3769 EXPECT_BEGIN(KERN_ERR,
3770 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
3771 EXPECT_BEGIN(KERN_ERR,
3772 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
3773 EXPECT_BEGIN(KERN_ERR,
3774 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
3775 EXPECT_BEGIN(KERN_ERR,
3776 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
3777
3778 ret = overlay_data_apply("overlay", NULL);
3779
3780 EXPECT_END(KERN_ERR,
3781 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
3782 EXPECT_END(KERN_ERR,
3783 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
3784 EXPECT_END(KERN_ERR,
3785 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
3786 EXPECT_END(KERN_ERR,
3787 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
3788 EXPECT_END(KERN_ERR,
3789 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
3790 EXPECT_END(KERN_ERR,
3791 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
3792 EXPECT_END(KERN_ERR,
3793 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
3794 EXPECT_END(KERN_ERR,
3795 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
3796 EXPECT_END(KERN_ERR,
3797 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
3798 EXPECT_END(KERN_ERR,
3799 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
3800 EXPECT_END(KERN_ERR,
3801 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
3802
3803 unittest(ret, "Adding overlay 'overlay' failed\n");
3804
3805 /* --- overlay_bad_add_dup_node --- */
3806
3807 EXPECT_BEGIN(KERN_ERR,
3808 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
3809 EXPECT_BEGIN(KERN_ERR,
3810 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
3811 EXPECT_BEGIN(KERN_ERR,
3812 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/controller:name");
3813 EXPECT_BEGIN(KERN_ERR,
3814 "OF: Error reverting changeset (-19)");
3815
3816 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL),
3817 "Adding overlay 'overlay_bad_add_dup_node' failed\n");
3818
3819 EXPECT_END(KERN_ERR,
3820 "OF: Error reverting changeset (-19)");
3821 EXPECT_END(KERN_ERR,
3822 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/controller:name");
3823 EXPECT_END(KERN_ERR,
3824 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
3825 EXPECT_END(KERN_ERR,
3826 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
3827
3828 /* --- overlay_bad_add_dup_prop --- */
3829
3830 EXPECT_BEGIN(KERN_ERR,
3831 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
3832 EXPECT_BEGIN(KERN_ERR,
3833 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
3834 EXPECT_BEGIN(KERN_ERR,
3835 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
3836 EXPECT_BEGIN(KERN_ERR,
3837 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/electric:name");
3838 EXPECT_BEGIN(KERN_ERR,
3839 "OF: Error reverting changeset (-19)");
3840
3841 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL),
3842 "Adding overlay 'overlay_bad_add_dup_prop' failed\n");
3843
3844 EXPECT_END(KERN_ERR,
3845 "OF: Error reverting changeset (-19)");
3846 EXPECT_END(KERN_ERR,
3847 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/motor-1/electric:name");
3848 EXPECT_END(KERN_ERR,
3849 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
3850 EXPECT_END(KERN_ERR,
3851 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
3852 EXPECT_END(KERN_ERR,
3853 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
3854
3855 /* --- overlay_bad_phandle --- */
3856
3857 unittest(overlay_data_apply("overlay_bad_phandle", NULL),
3858 "Adding overlay 'overlay_bad_phandle' failed\n");
3859
3860 /* --- overlay_bad_symbol --- */
3861
3862 EXPECT_BEGIN(KERN_ERR,
3863 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/hvac-medium-2:name");
3864 EXPECT_BEGIN(KERN_ERR,
3865 "OF: Error reverting changeset (-19)");
3866
3867 unittest(overlay_data_apply("overlay_bad_symbol", NULL),
3868 "Adding overlay 'overlay_bad_symbol' failed\n");
3869
3870 EXPECT_END(KERN_ERR,
3871 "OF: Error reverting changeset (-19)");
3872 EXPECT_END(KERN_ERR,
3873 "OF: changeset: apply failed: REMOVE_PROPERTY /testcase-data-2/substation@100/hvac-medium-2:name");
3874
3875 /* --- overlay_bad_unresolved --- */
3876
3877 EXPECT_BEGIN(KERN_ERR,
3878 "OF: resolver: node label 'this_label_does_not_exist' not found in live devicetree symbols table");
3879 EXPECT_BEGIN(KERN_ERR,
3880 "OF: resolver: overlay phandle fixup failed: -22");
3881
3882 unittest(overlay_data_apply("overlay_bad_unresolved", NULL),
3883 "Adding overlay 'overlay_bad_unresolved' failed\n");
3884
3885 EXPECT_END(KERN_ERR,
3886 "OF: resolver: overlay phandle fixup failed: -22");
3887 EXPECT_END(KERN_ERR,
3888 "OF: resolver: node label 'this_label_does_not_exist' not found in live devicetree symbols table");
3889
3890 return;
3891
3892err_unlock:
3893 mutex_unlock(&of_mutex);
3894}
3895
3896static int of_unittest_pci_dev_num;
3897static int of_unittest_pci_child_num;
3898
3899/*
3900 * PCI device tree node test driver
3901 */
3902static const struct pci_device_id testdrv_pci_ids[] = {
3903 { PCI_DEVICE(PCI_VENDOR_ID_REDHAT, 0x5), }, /* PCI_VENDOR_ID_REDHAT */
3904 { 0, }
3905};
3906
3907static int testdrv_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3908{
3909 struct overlay_info *info;
3910 struct device_node *dn;
3911 int ret, ovcs_id;
3912 u32 size;
3913
3914 dn = pdev->dev.of_node;
3915 if (!dn) {
3916 dev_err(&pdev->dev, "does not find bus endpoint");
3917 return -EINVAL;
3918 }
3919
3920 for (info = overlays; info && info->name; info++) {
3921 if (!strcmp(info->name, "overlay_pci_node"))
3922 break;
3923 }
3924 if (!info || !info->name) {
3925 dev_err(&pdev->dev, "no overlay data for overlay_pci_node");
3926 return -ENODEV;
3927 }
3928
3929 size = info->dtbo_end - info->dtbo_begin;
3930 ret = of_overlay_fdt_apply(info->dtbo_begin, size, &ovcs_id, dn);
3931 of_node_put(dn);
3932 if (ret)
3933 return ret;
3934
3935 of_platform_default_populate(dn, NULL, &pdev->dev);
3936 pci_set_drvdata(pdev, (void *)(uintptr_t)ovcs_id);
3937
3938 return 0;
3939}
3940
3941static void testdrv_remove(struct pci_dev *pdev)
3942{
3943 int ovcs_id = (int)(uintptr_t)pci_get_drvdata(pdev);
3944
3945 of_platform_depopulate(&pdev->dev);
3946 of_overlay_remove(&ovcs_id);
3947}
3948
3949static struct pci_driver testdrv_driver = {
3950 .name = "pci_dt_testdrv",
3951 .id_table = testdrv_pci_ids,
3952 .probe = testdrv_probe,
3953 .remove = testdrv_remove,
3954};
3955
3956static int unittest_pci_probe(struct platform_device *pdev)
3957{
3958 struct resource *res;
3959 struct device *dev;
3960 u64 exp_addr;
3961
3962 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
3963 if (!res)
3964 return -ENODEV;
3965
3966 dev = &pdev->dev;
3967 while (dev && !dev_is_pci(dev))
3968 dev = dev->parent;
3969 if (!dev) {
3970 pr_err("unable to find parent device\n");
3971 return -ENODEV;
3972 }
3973
3974 exp_addr = pci_resource_start(to_pci_dev(dev), 0) + 0x100;
3975 unittest(res->start == exp_addr, "Incorrect translated address %llx, expected %llx\n",
3976 (u64)res->start, exp_addr);
3977
3978 of_unittest_pci_child_num++;
3979
3980 return 0;
3981}
3982
3983static const struct of_device_id unittest_pci_of_match[] = {
3984 { .compatible = "unittest-pci" },
3985 { }
3986};
3987
3988static struct platform_driver unittest_pci_driver = {
3989 .probe = unittest_pci_probe,
3990 .driver = {
3991 .name = "unittest-pci",
3992 .of_match_table = unittest_pci_of_match,
3993 },
3994};
3995
3996static int of_unittest_pci_node_verify(struct pci_dev *pdev, bool add)
3997{
3998 struct device_node *pnp, *np = NULL;
3999 struct device *child_dev;
4000 char *path = NULL;
4001 const __be32 *reg;
4002 int rc = 0;
4003
4004 pnp = pdev->dev.of_node;
4005 unittest(pnp, "Failed creating PCI dt node\n");
4006 if (!pnp)
4007 return -ENODEV;
4008
4009 if (add) {
4010 path = kasprintf(GFP_KERNEL, "%pOF/pci-ep-bus@0/unittest-pci@100", pnp);
4011 np = of_find_node_by_path(path);
4012 unittest(np, "Failed to get unittest-pci node under PCI node\n");
4013 if (!np) {
4014 rc = -ENODEV;
4015 goto failed;
4016 }
4017
4018 reg = of_get_property(np, "reg", NULL);
4019 unittest(reg, "Failed to get reg property\n");
4020 if (!reg)
4021 rc = -ENODEV;
4022 } else {
4023 path = kasprintf(GFP_KERNEL, "%pOF/pci-ep-bus@0", pnp);
4024 np = of_find_node_by_path(path);
4025 unittest(!np, "Child device tree node is not removed\n");
4026 child_dev = device_find_any_child(&pdev->dev);
4027 unittest(!child_dev, "Child device is not removed\n");
4028 }
4029
4030failed:
4031 kfree(path);
4032 if (np)
4033 of_node_put(np);
4034
4035 return rc;
4036}
4037
4038static void __init of_unittest_pci_node(void)
4039{
4040 struct pci_dev *pdev = NULL;
4041 int rc;
4042
4043 if (!IS_ENABLED(CONFIG_PCI_DYNAMIC_OF_NODES))
4044 return;
4045
4046 rc = pci_register_driver(&testdrv_driver);
4047 unittest(!rc, "Failed to register pci test driver; rc = %d\n", rc);
4048 if (rc)
4049 return;
4050
4051 rc = platform_driver_register(&unittest_pci_driver);
4052 if (unittest(!rc, "Failed to register unittest pci driver\n")) {
4053 pci_unregister_driver(&testdrv_driver);
4054 return;
4055 }
4056
4057 while ((pdev = pci_get_device(PCI_VENDOR_ID_REDHAT, 0x5, pdev)) != NULL) {
4058 of_unittest_pci_node_verify(pdev, true);
4059 of_unittest_pci_dev_num++;
4060 }
4061 if (pdev)
4062 pci_dev_put(pdev);
4063
4064 unittest(of_unittest_pci_dev_num,
4065 "No test PCI device been found. Please run QEMU with '-device pci-testdev'\n");
4066 unittest(of_unittest_pci_dev_num == of_unittest_pci_child_num,
4067 "Child device number %d is not expected %d", of_unittest_pci_child_num,
4068 of_unittest_pci_dev_num);
4069
4070 platform_driver_unregister(&unittest_pci_driver);
4071 pci_unregister_driver(&testdrv_driver);
4072
4073 while ((pdev = pci_get_device(PCI_VENDOR_ID_REDHAT, 0x5, pdev)) != NULL)
4074 of_unittest_pci_node_verify(pdev, false);
4075 if (pdev)
4076 pci_dev_put(pdev);
4077}
4078#else
4079
4080static inline __init void of_unittest_overlay_high_level(void) {}
4081static inline __init void of_unittest_pci_node(void) { }
4082
4083#endif
4084
4085static int __init of_unittest(void)
4086{
4087 struct device_node *np;
4088 int res;
4089
4090 pr_info("start of unittest - you will see error messages\n");
4091
4092 /* Taint the kernel so we know we've run tests. */
4093 add_taint(TAINT_TEST, LOCKDEP_STILL_OK);
4094
4095 /* adding data for unittest */
4096
4097 if (IS_ENABLED(CONFIG_UML))
4098 unittest_unflatten_overlay_base();
4099
4100 res = unittest_data_add();
4101 if (res)
4102 return res;
4103 if (!of_aliases)
4104 of_aliases = of_find_node_by_path("/aliases");
4105
4106 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
4107 if (!np) {
4108 pr_info("No testcase data in device tree; not running tests\n");
4109 return 0;
4110 }
4111 of_node_put(np);
4112
4113 of_unittest_check_tree_linkage();
4114 of_unittest_check_phandles();
4115 of_unittest_find_node_by_name();
4116 of_unittest_dynamic();
4117 of_unittest_parse_phandle_with_args();
4118 of_unittest_parse_phandle_with_args_map();
4119 of_unittest_printf();
4120 of_unittest_property_string();
4121 of_unittest_property_copy();
4122 of_unittest_changeset();
4123 of_unittest_parse_interrupts();
4124 of_unittest_parse_interrupts_extended();
4125 of_unittest_dma_get_max_cpu_address();
4126 of_unittest_parse_dma_ranges();
4127 of_unittest_pci_dma_ranges();
4128 of_unittest_bus_ranges();
4129 of_unittest_bus_3cell_ranges();
4130 of_unittest_reg();
4131 of_unittest_translate_addr();
4132 of_unittest_match_node();
4133 of_unittest_platform_populate();
4134 of_unittest_overlay();
4135 of_unittest_lifecycle();
4136 of_unittest_pci_node();
4137
4138 /* Double check linkage after removing testcase data */
4139 of_unittest_check_tree_linkage();
4140
4141 of_unittest_overlay_high_level();
4142
4143 pr_info("end of unittest - %i passed, %i failed\n",
4144 unittest_results.passed, unittest_results.failed);
4145
4146 return 0;
4147}
4148late_initcall(of_unittest);