1
2
3
4
5
6#define pr_fmt(fmt) "### dt-test ### " fmt
7
8#include <linux/memblock.h>
9#include <linux/clk.h>
10#include <linux/err.h>
11#include <linux/errno.h>
12#include <linux/hashtable.h>
13#include <linux/libfdt.h>
14#include <linux/of.h>
15#include <linux/of_fdt.h>
16#include <linux/of_irq.h>
17#include <linux/of_platform.h>
18#include <linux/list.h>
19#include <linux/mutex.h>
20#include <linux/slab.h>
21#include <linux/device.h>
22#include <linux/platform_device.h>
23
24#include <linux/i2c.h>
25#include <linux/i2c-mux.h>
26
27#include <linux/bitops.h>
28
29#include "of_private.h"
30
31static struct unittest_results {
32 int passed;
33 int failed;
34} unittest_results;
35
36#define unittest(result, fmt, ...) ({ \
37 bool failed = !(result); \
38 if (failed) { \
39 unittest_results.failed++; \
40 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
41 } else { \
42 unittest_results.passed++; \
43 pr_debug("pass %s():%i\n", __func__, __LINE__); \
44 } \
45 failed; \
46})
47
48static void __init of_unittest_find_node_by_name(void)
49{
50 struct device_node *np;
51 const char *options, *name;
52
53 np = of_find_node_by_path("/testcase-data");
54 name = kasprintf(GFP_KERNEL, "%pOF", np);
55 unittest(np && !strcmp("/testcase-data", name),
56 "find /testcase-data failed\n");
57 of_node_put(np);
58 kfree(name);
59
60
61 np = of_find_node_by_path("/testcase-data/");
62 unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
63
64 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
65 name = kasprintf(GFP_KERNEL, "%pOF", np);
66 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
67 "find /testcase-data/phandle-tests/consumer-a failed\n");
68 of_node_put(np);
69 kfree(name);
70
71 np = of_find_node_by_path("testcase-alias");
72 name = kasprintf(GFP_KERNEL, "%pOF", np);
73 unittest(np && !strcmp("/testcase-data", name),
74 "find testcase-alias failed\n");
75 of_node_put(np);
76 kfree(name);
77
78
79 np = of_find_node_by_path("testcase-alias/");
80 unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
81
82 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
83 name = kasprintf(GFP_KERNEL, "%pOF", np);
84 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
85 "find testcase-alias/phandle-tests/consumer-a failed\n");
86 of_node_put(np);
87 kfree(name);
88
89 np = of_find_node_by_path("/testcase-data/missing-path");
90 unittest(!np, "non-existent path returned node %pOF\n", np);
91 of_node_put(np);
92
93 np = of_find_node_by_path("missing-alias");
94 unittest(!np, "non-existent alias returned node %pOF\n", np);
95 of_node_put(np);
96
97 np = of_find_node_by_path("testcase-alias/missing-path");
98 unittest(!np, "non-existent alias with relative path returned node %pOF\n", np);
99 of_node_put(np);
100
101 np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
102 unittest(np && !strcmp("testoption", options),
103 "option path test failed\n");
104 of_node_put(np);
105
106 np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
107 unittest(np && !strcmp("test/option", options),
108 "option path test, subcase #1 failed\n");
109 of_node_put(np);
110
111 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
112 unittest(np && !strcmp("test/option", options),
113 "option path test, subcase #2 failed\n");
114 of_node_put(np);
115
116 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
117 unittest(np, "NULL option path test failed\n");
118 of_node_put(np);
119
120 np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
121 &options);
122 unittest(np && !strcmp("testaliasoption", options),
123 "option alias path test failed\n");
124 of_node_put(np);
125
126 np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
127 &options);
128 unittest(np && !strcmp("test/alias/option", options),
129 "option alias path test, subcase #1 failed\n");
130 of_node_put(np);
131
132 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
133 unittest(np, "NULL option alias path test failed\n");
134 of_node_put(np);
135
136 options = "testoption";
137 np = of_find_node_opts_by_path("testcase-alias", &options);
138 unittest(np && !options, "option clearing test failed\n");
139 of_node_put(np);
140
141 options = "testoption";
142 np = of_find_node_opts_by_path("/", &options);
143 unittest(np && !options, "option clearing root node test failed\n");
144 of_node_put(np);
145}
146
147static void __init of_unittest_dynamic(void)
148{
149 struct device_node *np;
150 struct property *prop;
151
152 np = of_find_node_by_path("/testcase-data");
153 if (!np) {
154 pr_err("missing testcase data\n");
155 return;
156 }
157
158
159 prop = kcalloc(4, sizeof(*prop), GFP_KERNEL);
160 if (!prop) {
161 unittest(0, "kzalloc() failed\n");
162 return;
163 }
164
165
166 prop->name = "new-property";
167 prop->value = "new-property-data";
168 prop->length = strlen(prop->value) + 1;
169 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
170
171
172 prop++;
173 prop->name = "new-property";
174 prop->value = "new-property-data-should-fail";
175 prop->length = strlen(prop->value) + 1;
176 unittest(of_add_property(np, prop) != 0,
177 "Adding an existing property should have failed\n");
178
179
180 prop->value = "modify-property-data-should-pass";
181 prop->length = strlen(prop->value) + 1;
182 unittest(of_update_property(np, prop) == 0,
183 "Updating an existing property should have passed\n");
184
185
186 prop++;
187 prop->name = "modify-property";
188 prop->value = "modify-missing-property-data-should-pass";
189 prop->length = strlen(prop->value) + 1;
190 unittest(of_update_property(np, prop) == 0,
191 "Updating a missing property should have passed\n");
192
193
194 unittest(of_remove_property(np, prop) == 0,
195 "Removing a property should have passed\n");
196
197
198 prop++;
199 prop->name = "large-property-PAGE_SIZEx8";
200 prop->length = PAGE_SIZE * 8;
201 prop->value = kzalloc(prop->length, GFP_KERNEL);
202 unittest(prop->value != NULL, "Unable to allocate large buffer\n");
203 if (prop->value)
204 unittest(of_add_property(np, prop) == 0,
205 "Adding a large property should have passed\n");
206}
207
208static int __init of_unittest_check_node_linkage(struct device_node *np)
209{
210 struct device_node *child;
211 int count = 0, rc;
212
213 for_each_child_of_node(np, child) {
214 if (child->parent != np) {
215 pr_err("Child node %pOFn links to wrong parent %pOFn\n",
216 child, np);
217 rc = -EINVAL;
218 goto put_child;
219 }
220
221 rc = of_unittest_check_node_linkage(child);
222 if (rc < 0)
223 goto put_child;
224 count += rc;
225 }
226
227 return count + 1;
228put_child:
229 of_node_put(child);
230 return rc;
231}
232
233static void __init of_unittest_check_tree_linkage(void)
234{
235 struct device_node *np;
236 int allnode_count = 0, child_count;
237
238 if (!of_root)
239 return;
240
241 for_each_of_allnodes(np)
242 allnode_count++;
243 child_count = of_unittest_check_node_linkage(of_root);
244
245 unittest(child_count > 0, "Device node data structure is corrupted\n");
246 unittest(child_count == allnode_count,
247 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
248 allnode_count, child_count);
249 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
250}
251
252static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
253 const char *expected)
254{
255 unsigned char *buf;
256 int buf_size;
257 int size, i;
258
259 buf_size = strlen(expected) + 10;
260 buf = kmalloc(buf_size, GFP_KERNEL);
261 if (!buf)
262 return;
263
264
265 memset(buf, 0xff, buf_size);
266 size = snprintf(buf, buf_size - 2, fmt, np);
267
268
269 unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
270 "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
271 fmt, expected, buf);
272
273
274 size++;
275 for (i = 0; i < 2; i++, size--) {
276
277 memset(buf, 0xff, buf_size);
278 snprintf(buf, size+1, fmt, np);
279 unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
280 "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
281 size, fmt, expected, buf);
282 }
283 kfree(buf);
284}
285
286static void __init of_unittest_printf(void)
287{
288 struct device_node *np;
289 const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
290 char phandle_str[16] = "";
291
292 np = of_find_node_by_path(full_name);
293 if (!np) {
294 unittest(np, "testcase data missing\n");
295 return;
296 }
297
298 num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0);
299
300 of_unittest_printf_one(np, "%pOF", full_name);
301 of_unittest_printf_one(np, "%pOFf", full_name);
302 of_unittest_printf_one(np, "%pOFn", "dev");
303 of_unittest_printf_one(np, "%2pOFn", "dev");
304 of_unittest_printf_one(np, "%5pOFn", " dev");
305 of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device");
306 of_unittest_printf_one(np, "%pOFp", phandle_str);
307 of_unittest_printf_one(np, "%pOFP", "dev@100");
308 of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
309 of_unittest_printf_one(np, "%10pOFP", " dev@100");
310 of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
311 of_unittest_printf_one(of_root, "%pOFP", "/");
312 of_unittest_printf_one(np, "%pOFF", "----");
313 of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
314 of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
315 of_unittest_printf_one(np, "%pOFc", "test-sub-device");
316 of_unittest_printf_one(np, "%pOFC",
317 "\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
318}
319
320struct node_hash {
321 struct hlist_node node;
322 struct device_node *np;
323};
324
325static DEFINE_HASHTABLE(phandle_ht, 8);
326static void __init of_unittest_check_phandles(void)
327{
328 struct device_node *np;
329 struct node_hash *nh;
330 struct hlist_node *tmp;
331 int i, dup_count = 0, phandle_count = 0;
332
333 for_each_of_allnodes(np) {
334 if (!np->phandle)
335 continue;
336
337 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
338 if (nh->np->phandle == np->phandle) {
339 pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
340 np->phandle, nh->np, np);
341 dup_count++;
342 break;
343 }
344 }
345
346 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
347 if (!nh)
348 return;
349
350 nh->np = np;
351 hash_add(phandle_ht, &nh->node, np->phandle);
352 phandle_count++;
353 }
354 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
355 dup_count, phandle_count);
356
357
358 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
359 hash_del(&nh->node);
360 kfree(nh);
361 }
362}
363
364static void __init of_unittest_parse_phandle_with_args(void)
365{
366 struct device_node *np;
367 struct of_phandle_args args;
368 int i, rc;
369
370 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
371 if (!np) {
372 pr_err("missing testcase data\n");
373 return;
374 }
375
376 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
377 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
378
379 for (i = 0; i < 8; i++) {
380 bool passed = true;
381
382 memset(&args, 0, sizeof(args));
383 rc = of_parse_phandle_with_args(np, "phandle-list",
384 "#phandle-cells", i, &args);
385
386
387 switch (i) {
388 case 0:
389 passed &= !rc;
390 passed &= (args.args_count == 1);
391 passed &= (args.args[0] == (i + 1));
392 break;
393 case 1:
394 passed &= !rc;
395 passed &= (args.args_count == 2);
396 passed &= (args.args[0] == (i + 1));
397 passed &= (args.args[1] == 0);
398 break;
399 case 2:
400 passed &= (rc == -ENOENT);
401 break;
402 case 3:
403 passed &= !rc;
404 passed &= (args.args_count == 3);
405 passed &= (args.args[0] == (i + 1));
406 passed &= (args.args[1] == 4);
407 passed &= (args.args[2] == 3);
408 break;
409 case 4:
410 passed &= !rc;
411 passed &= (args.args_count == 2);
412 passed &= (args.args[0] == (i + 1));
413 passed &= (args.args[1] == 100);
414 break;
415 case 5:
416 passed &= !rc;
417 passed &= (args.args_count == 0);
418 break;
419 case 6:
420 passed &= !rc;
421 passed &= (args.args_count == 1);
422 passed &= (args.args[0] == (i + 1));
423 break;
424 case 7:
425 passed &= (rc == -ENOENT);
426 break;
427 default:
428 passed = false;
429 }
430
431 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
432 i, args.np, rc);
433 }
434
435
436 memset(&args, 0, sizeof(args));
437 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
438 "#phandle-cells", 0, &args);
439 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
440 rc = of_count_phandle_with_args(np, "phandle-list-missing",
441 "#phandle-cells");
442 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
443
444
445 memset(&args, 0, sizeof(args));
446 rc = of_parse_phandle_with_args(np, "phandle-list",
447 "#phandle-cells-missing", 0, &args);
448 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
449 rc = of_count_phandle_with_args(np, "phandle-list",
450 "#phandle-cells-missing");
451 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
452
453
454 memset(&args, 0, sizeof(args));
455 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
456 "#phandle-cells", 0, &args);
457 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
458 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
459 "#phandle-cells");
460 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
461
462
463 memset(&args, 0, sizeof(args));
464 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
465 "#phandle-cells", 1, &args);
466 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
467 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
468 "#phandle-cells");
469 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
470}
471
472static void __init of_unittest_parse_phandle_with_args_map(void)
473{
474 struct device_node *np, *p0, *p1, *p2, *p3;
475 struct of_phandle_args args;
476 int i, rc;
477
478 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
479 if (!np) {
480 pr_err("missing testcase data\n");
481 return;
482 }
483
484 p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
485 if (!p0) {
486 pr_err("missing testcase data\n");
487 return;
488 }
489
490 p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
491 if (!p1) {
492 pr_err("missing testcase data\n");
493 return;
494 }
495
496 p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
497 if (!p2) {
498 pr_err("missing testcase data\n");
499 return;
500 }
501
502 p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
503 if (!p3) {
504 pr_err("missing testcase data\n");
505 return;
506 }
507
508 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
509 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
510
511 for (i = 0; i < 8; i++) {
512 bool passed = true;
513
514 memset(&args, 0, sizeof(args));
515 rc = of_parse_phandle_with_args_map(np, "phandle-list",
516 "phandle", i, &args);
517
518
519 switch (i) {
520 case 0:
521 passed &= !rc;
522 passed &= (args.np == p1);
523 passed &= (args.args_count == 1);
524 passed &= (args.args[0] == 1);
525 break;
526 case 1:
527 passed &= !rc;
528 passed &= (args.np == p3);
529 passed &= (args.args_count == 3);
530 passed &= (args.args[0] == 2);
531 passed &= (args.args[1] == 5);
532 passed &= (args.args[2] == 3);
533 break;
534 case 2:
535 passed &= (rc == -ENOENT);
536 break;
537 case 3:
538 passed &= !rc;
539 passed &= (args.np == p0);
540 passed &= (args.args_count == 0);
541 break;
542 case 4:
543 passed &= !rc;
544 passed &= (args.np == p1);
545 passed &= (args.args_count == 1);
546 passed &= (args.args[0] == 3);
547 break;
548 case 5:
549 passed &= !rc;
550 passed &= (args.np == p0);
551 passed &= (args.args_count == 0);
552 break;
553 case 6:
554 passed &= !rc;
555 passed &= (args.np == p2);
556 passed &= (args.args_count == 2);
557 passed &= (args.args[0] == 15);
558 passed &= (args.args[1] == 0x20);
559 break;
560 case 7:
561 passed &= (rc == -ENOENT);
562 break;
563 default:
564 passed = false;
565 }
566
567 unittest(passed, "index %i - data error on node %s rc=%i\n",
568 i, args.np->full_name, rc);
569 }
570
571
572 memset(&args, 0, sizeof(args));
573 rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
574 "phandle", 0, &args);
575 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
576
577
578 memset(&args, 0, sizeof(args));
579 rc = of_parse_phandle_with_args_map(np, "phandle-list",
580 "phandle-missing", 0, &args);
581 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
582
583
584 memset(&args, 0, sizeof(args));
585 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
586 "phandle", 0, &args);
587 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
588
589
590 memset(&args, 0, sizeof(args));
591 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
592 "phandle", 1, &args);
593 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
594}
595
596static void __init of_unittest_property_string(void)
597{
598 const char *strings[4];
599 struct device_node *np;
600 int rc;
601
602 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
603 if (!np) {
604 pr_err("No testcase data in device tree\n");
605 return;
606 }
607
608 rc = of_property_match_string(np, "phandle-list-names", "first");
609 unittest(rc == 0, "first expected:0 got:%i\n", rc);
610 rc = of_property_match_string(np, "phandle-list-names", "second");
611 unittest(rc == 1, "second expected:1 got:%i\n", rc);
612 rc = of_property_match_string(np, "phandle-list-names", "third");
613 unittest(rc == 2, "third expected:2 got:%i\n", rc);
614 rc = of_property_match_string(np, "phandle-list-names", "fourth");
615 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
616 rc = of_property_match_string(np, "missing-property", "blah");
617 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
618 rc = of_property_match_string(np, "empty-property", "blah");
619 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
620 rc = of_property_match_string(np, "unterminated-string", "blah");
621 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
622
623
624 rc = of_property_count_strings(np, "string-property");
625 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
626 rc = of_property_count_strings(np, "phandle-list-names");
627 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
628 rc = of_property_count_strings(np, "unterminated-string");
629 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
630 rc = of_property_count_strings(np, "unterminated-string-list");
631 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
632
633
634 rc = of_property_read_string_index(np, "string-property", 0, strings);
635 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
636 strings[0] = NULL;
637 rc = of_property_read_string_index(np, "string-property", 1, strings);
638 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
639 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
640 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
641 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
642 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
643 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
644 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
645 strings[0] = NULL;
646 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
647 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
648 strings[0] = NULL;
649 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
650 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
651 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
652 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
653 strings[0] = NULL;
654 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings);
655 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
656 strings[1] = NULL;
657
658
659 rc = of_property_read_string_array(np, "string-property", strings, 4);
660 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
661 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
662 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
663 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
664 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
665
666 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
667 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
668
669 strings[2] = NULL;
670 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
671 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
672 strings[1] = NULL;
673 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
674 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
675}
676
677#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
678 (p1)->value && (p2)->value && \
679 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
680 !strcmp((p1)->name, (p2)->name))
681static void __init of_unittest_property_copy(void)
682{
683#ifdef CONFIG_OF_DYNAMIC
684 struct property p1 = { .name = "p1", .length = 0, .value = "" };
685 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
686 struct property *new;
687
688 new = __of_prop_dup(&p1, GFP_KERNEL);
689 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
690 kfree(new->value);
691 kfree(new->name);
692 kfree(new);
693
694 new = __of_prop_dup(&p2, GFP_KERNEL);
695 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
696 kfree(new->value);
697 kfree(new->name);
698 kfree(new);
699#endif
700}
701
702static void __init of_unittest_changeset(void)
703{
704#ifdef CONFIG_OF_DYNAMIC
705 struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" };
706 struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" };
707 struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" };
708 struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" };
709 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
710 struct property *ppremove;
711 struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np;
712 struct of_changeset chgset;
713
714 n1 = __of_node_dup(NULL, "n1");
715 unittest(n1, "testcase setup failure\n");
716
717 n2 = __of_node_dup(NULL, "n2");
718 unittest(n2, "testcase setup failure\n");
719
720 n21 = __of_node_dup(NULL, "n21");
721 unittest(n21, "testcase setup failure %p\n", n21);
722
723 nchangeset = of_find_node_by_path("/testcase-data/changeset");
724 nremove = of_get_child_by_name(nchangeset, "node-remove");
725 unittest(nremove, "testcase setup failure\n");
726
727 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
728 unittest(ppadd, "testcase setup failure\n");
729
730 ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL);
731 unittest(ppname_n1, "testcase setup failure\n");
732
733 ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL);
734 unittest(ppname_n2, "testcase setup failure\n");
735
736 ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
737 unittest(ppname_n21, "testcase setup failure\n");
738
739 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
740 unittest(ppupdate, "testcase setup failure\n");
741
742 parent = nchangeset;
743 n1->parent = parent;
744 n2->parent = parent;
745 n21->parent = n2;
746
747 ppremove = of_find_property(parent, "prop-remove", NULL);
748 unittest(ppremove, "failed to find removal prop");
749
750 of_changeset_init(&chgset);
751
752 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
753 unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n");
754
755 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
756 unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n");
757
758 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
759 unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n");
760
761 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
762
763 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n");
764 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
765 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
766
767 unittest(!of_changeset_apply(&chgset), "apply failed\n");
768
769 of_node_put(nchangeset);
770
771
772 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
773 "'%pOF' not added\n", n21);
774 of_node_put(np);
775
776 unittest(!of_changeset_revert(&chgset), "revert failed\n");
777
778 of_changeset_destroy(&chgset);
779#endif
780}
781
782static void __init of_unittest_parse_interrupts(void)
783{
784 struct device_node *np;
785 struct of_phandle_args args;
786 int i, rc;
787
788 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
789 return;
790
791 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
792 if (!np) {
793 pr_err("missing testcase data\n");
794 return;
795 }
796
797 for (i = 0; i < 4; i++) {
798 bool passed = true;
799
800 memset(&args, 0, sizeof(args));
801 rc = of_irq_parse_one(np, i, &args);
802
803 passed &= !rc;
804 passed &= (args.args_count == 1);
805 passed &= (args.args[0] == (i + 1));
806
807 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
808 i, args.np, rc);
809 }
810 of_node_put(np);
811
812 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
813 if (!np) {
814 pr_err("missing testcase data\n");
815 return;
816 }
817
818 for (i = 0; i < 4; i++) {
819 bool passed = true;
820
821 memset(&args, 0, sizeof(args));
822 rc = of_irq_parse_one(np, i, &args);
823
824
825 switch (i) {
826 case 0:
827 passed &= !rc;
828 passed &= (args.args_count == 1);
829 passed &= (args.args[0] == 9);
830 break;
831 case 1:
832 passed &= !rc;
833 passed &= (args.args_count == 3);
834 passed &= (args.args[0] == 10);
835 passed &= (args.args[1] == 11);
836 passed &= (args.args[2] == 12);
837 break;
838 case 2:
839 passed &= !rc;
840 passed &= (args.args_count == 2);
841 passed &= (args.args[0] == 13);
842 passed &= (args.args[1] == 14);
843 break;
844 case 3:
845 passed &= !rc;
846 passed &= (args.args_count == 2);
847 passed &= (args.args[0] == 15);
848 passed &= (args.args[1] == 16);
849 break;
850 default:
851 passed = false;
852 }
853 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
854 i, args.np, rc);
855 }
856 of_node_put(np);
857}
858
859static void __init of_unittest_parse_interrupts_extended(void)
860{
861 struct device_node *np;
862 struct of_phandle_args args;
863 int i, rc;
864
865 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
866 return;
867
868 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
869 if (!np) {
870 pr_err("missing testcase data\n");
871 return;
872 }
873
874 for (i = 0; i < 7; i++) {
875 bool passed = true;
876
877 memset(&args, 0, sizeof(args));
878 rc = of_irq_parse_one(np, i, &args);
879
880
881 switch (i) {
882 case 0:
883 passed &= !rc;
884 passed &= (args.args_count == 1);
885 passed &= (args.args[0] == 1);
886 break;
887 case 1:
888 passed &= !rc;
889 passed &= (args.args_count == 3);
890 passed &= (args.args[0] == 2);
891 passed &= (args.args[1] == 3);
892 passed &= (args.args[2] == 4);
893 break;
894 case 2:
895 passed &= !rc;
896 passed &= (args.args_count == 2);
897 passed &= (args.args[0] == 5);
898 passed &= (args.args[1] == 6);
899 break;
900 case 3:
901 passed &= !rc;
902 passed &= (args.args_count == 1);
903 passed &= (args.args[0] == 9);
904 break;
905 case 4:
906 passed &= !rc;
907 passed &= (args.args_count == 3);
908 passed &= (args.args[0] == 10);
909 passed &= (args.args[1] == 11);
910 passed &= (args.args[2] == 12);
911 break;
912 case 5:
913 passed &= !rc;
914 passed &= (args.args_count == 2);
915 passed &= (args.args[0] == 13);
916 passed &= (args.args[1] == 14);
917 break;
918 case 6:
919 passed &= !rc;
920 passed &= (args.args_count == 1);
921 passed &= (args.args[0] == 15);
922 break;
923 default:
924 passed = false;
925 }
926
927 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
928 i, args.np, rc);
929 }
930 of_node_put(np);
931}
932
933static const struct of_device_id match_node_table[] = {
934 { .data = "A", .name = "name0", },
935 { .data = "B", .type = "type1", },
936
937 { .data = "Ca", .name = "name2", .type = "type1", },
938 { .data = "Cb", .name = "name2", },
939 { .data = "Cc", .name = "name2", .type = "type2", },
940
941 { .data = "E", .compatible = "compat3" },
942 { .data = "G", .compatible = "compat2", },
943 { .data = "H", .compatible = "compat2", .name = "name5", },
944 { .data = "I", .compatible = "compat2", .type = "type1", },
945 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
946 { .data = "K", .compatible = "compat2", .name = "name9", },
947 {}
948};
949
950static struct {
951 const char *path;
952 const char *data;
953} match_node_tests[] = {
954 { .path = "/testcase-data/match-node/name0", .data = "A", },
955 { .path = "/testcase-data/match-node/name1", .data = "B", },
956 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
957 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
958 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
959 { .path = "/testcase-data/match-node/name3", .data = "E", },
960 { .path = "/testcase-data/match-node/name4", .data = "G", },
961 { .path = "/testcase-data/match-node/name5", .data = "H", },
962 { .path = "/testcase-data/match-node/name6", .data = "G", },
963 { .path = "/testcase-data/match-node/name7", .data = "I", },
964 { .path = "/testcase-data/match-node/name8", .data = "J", },
965 { .path = "/testcase-data/match-node/name9", .data = "K", },
966};
967
968static void __init of_unittest_match_node(void)
969{
970 struct device_node *np;
971 const struct of_device_id *match;
972 int i;
973
974 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
975 np = of_find_node_by_path(match_node_tests[i].path);
976 if (!np) {
977 unittest(0, "missing testcase node %s\n",
978 match_node_tests[i].path);
979 continue;
980 }
981
982 match = of_match_node(match_node_table, np);
983 if (!match) {
984 unittest(0, "%s didn't match anything\n",
985 match_node_tests[i].path);
986 continue;
987 }
988
989 if (strcmp(match->data, match_node_tests[i].data) != 0) {
990 unittest(0, "%s got wrong match. expected %s, got %s\n",
991 match_node_tests[i].path, match_node_tests[i].data,
992 (const char *)match->data);
993 continue;
994 }
995 unittest(1, "passed");
996 }
997}
998
999static struct resource test_bus_res = {
1000 .start = 0xfffffff8,
1001 .end = 0xfffffff9,
1002 .flags = IORESOURCE_MEM,
1003};
1004static const struct platform_device_info test_bus_info = {
1005 .name = "unittest-bus",
1006};
1007static void __init of_unittest_platform_populate(void)
1008{
1009 int irq, rc;
1010 struct device_node *np, *child, *grandchild;
1011 struct platform_device *pdev, *test_bus;
1012 const struct of_device_id match[] = {
1013 { .compatible = "test-device", },
1014 {}
1015 };
1016
1017 np = of_find_node_by_path("/testcase-data");
1018 of_platform_default_populate(np, NULL, NULL);
1019
1020
1021 np = of_find_node_by_path("/testcase-data/testcase-device1");
1022 pdev = of_find_device_by_node(np);
1023 unittest(pdev, "device 1 creation failed\n");
1024
1025 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
1026 irq = platform_get_irq(pdev, 0);
1027 unittest(irq == -EPROBE_DEFER,
1028 "device deferred probe failed - %d\n", irq);
1029
1030
1031 np = of_find_node_by_path("/testcase-data/testcase-device2");
1032 pdev = of_find_device_by_node(np);
1033 unittest(pdev, "device 2 creation failed\n");
1034 irq = platform_get_irq(pdev, 0);
1035 unittest(irq < 0 && irq != -EPROBE_DEFER,
1036 "device parsing error failed - %d\n", irq);
1037 }
1038
1039 np = of_find_node_by_path("/testcase-data/platform-tests");
1040 unittest(np, "No testcase data in device tree\n");
1041 if (!np)
1042 return;
1043
1044 test_bus = platform_device_register_full(&test_bus_info);
1045 rc = PTR_ERR_OR_ZERO(test_bus);
1046 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
1047 if (rc)
1048 return;
1049 test_bus->dev.of_node = np;
1050
1051
1052
1053
1054
1055
1056
1057
1058 platform_device_add_resources(test_bus, &test_bus_res, 1);
1059
1060 of_platform_populate(np, match, NULL, &test_bus->dev);
1061 for_each_child_of_node(np, child) {
1062 for_each_child_of_node(child, grandchild)
1063 unittest(of_find_device_by_node(grandchild),
1064 "Could not create device for node '%pOFn'\n",
1065 grandchild);
1066 }
1067
1068 of_platform_depopulate(&test_bus->dev);
1069 for_each_child_of_node(np, child) {
1070 for_each_child_of_node(child, grandchild)
1071 unittest(!of_find_device_by_node(grandchild),
1072 "device didn't get destroyed '%pOFn'\n",
1073 grandchild);
1074 }
1075
1076 platform_device_unregister(test_bus);
1077 of_node_put(np);
1078}
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088static void update_node_properties(struct device_node *np,
1089 struct device_node *dup)
1090{
1091 struct property *prop;
1092 struct property *save_next;
1093 struct device_node *child;
1094 int ret;
1095
1096 for_each_child_of_node(np, child)
1097 child->parent = dup;
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116 for (prop = np->properties; prop != NULL; prop = save_next) {
1117 save_next = prop->next;
1118 ret = of_add_property(dup, prop);
1119 if (ret) {
1120 if (ret == -EEXIST && !strcmp(prop->name, "name"))
1121 continue;
1122 pr_err("unittest internal error: unable to add testdata property %pOF/%s",
1123 np, prop->name);
1124 }
1125 }
1126}
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138static void attach_node_and_children(struct device_node *np)
1139{
1140 struct device_node *next, *dup, *child;
1141 unsigned long flags;
1142 const char *full_name;
1143
1144 full_name = kasprintf(GFP_KERNEL, "%pOF", np);
1145
1146 if (!strcmp(full_name, "/__local_fixups__") ||
1147 !strcmp(full_name, "/__fixups__"))
1148 return;
1149
1150 dup = of_find_node_by_path(full_name);
1151 kfree(full_name);
1152 if (dup) {
1153 update_node_properties(np, dup);
1154 return;
1155 }
1156
1157 child = np->child;
1158 np->child = NULL;
1159
1160 mutex_lock(&of_mutex);
1161 raw_spin_lock_irqsave(&devtree_lock, flags);
1162 np->sibling = np->parent->child;
1163 np->parent->child = np;
1164 of_node_clear_flag(np, OF_DETACHED);
1165 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1166
1167 __of_attach_node_sysfs(np);
1168 mutex_unlock(&of_mutex);
1169
1170 while (child) {
1171 next = child->sibling;
1172 attach_node_and_children(child);
1173 child = next;
1174 }
1175}
1176
1177
1178
1179
1180
1181static int __init unittest_data_add(void)
1182{
1183 void *unittest_data;
1184 struct device_node *unittest_data_node, *np;
1185
1186
1187
1188
1189 extern uint8_t __dtb_testcases_begin[];
1190 extern uint8_t __dtb_testcases_end[];
1191 const int size = __dtb_testcases_end - __dtb_testcases_begin;
1192 int rc;
1193
1194 if (!size) {
1195 pr_warn("%s: No testcase data to attach; not running tests\n",
1196 __func__);
1197 return -ENODATA;
1198 }
1199
1200
1201 unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
1202 if (!unittest_data)
1203 return -ENOMEM;
1204
1205 of_fdt_unflatten_tree(unittest_data, NULL, &unittest_data_node);
1206 if (!unittest_data_node) {
1207 pr_warn("%s: No tree to attach; not running tests\n", __func__);
1208 return -ENODATA;
1209 }
1210
1211
1212
1213
1214 of_overlay_mutex_lock();
1215
1216 rc = of_resolve_phandles(unittest_data_node);
1217 if (rc) {
1218 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
1219 of_overlay_mutex_unlock();
1220 return -EINVAL;
1221 }
1222
1223 if (!of_root) {
1224 of_root = unittest_data_node;
1225 for_each_of_allnodes(np)
1226 __of_attach_node_sysfs(np);
1227 of_aliases = of_find_node_by_path("/aliases");
1228 of_chosen = of_find_node_by_path("/chosen");
1229 of_overlay_mutex_unlock();
1230 return 0;
1231 }
1232
1233
1234 np = unittest_data_node->child;
1235 while (np) {
1236 struct device_node *next = np->sibling;
1237
1238 np->parent = of_root;
1239 attach_node_and_children(np);
1240 np = next;
1241 }
1242
1243 of_overlay_mutex_unlock();
1244
1245 return 0;
1246}
1247
1248#ifdef CONFIG_OF_OVERLAY
1249static int __init overlay_data_apply(const char *overlay_name, int *overlay_id);
1250
1251static int unittest_probe(struct platform_device *pdev)
1252{
1253 struct device *dev = &pdev->dev;
1254 struct device_node *np = dev->of_node;
1255
1256 if (np == NULL) {
1257 dev_err(dev, "No OF data for device\n");
1258 return -EINVAL;
1259
1260 }
1261
1262 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1263
1264 of_platform_populate(np, NULL, NULL, &pdev->dev);
1265
1266 return 0;
1267}
1268
1269static int unittest_remove(struct platform_device *pdev)
1270{
1271 struct device *dev = &pdev->dev;
1272 struct device_node *np = dev->of_node;
1273
1274 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1275 return 0;
1276}
1277
1278static const struct of_device_id unittest_match[] = {
1279 { .compatible = "unittest", },
1280 {},
1281};
1282
1283static struct platform_driver unittest_driver = {
1284 .probe = unittest_probe,
1285 .remove = unittest_remove,
1286 .driver = {
1287 .name = "unittest",
1288 .of_match_table = of_match_ptr(unittest_match),
1289 },
1290};
1291
1292
1293static struct platform_device *of_path_to_platform_device(const char *path)
1294{
1295 struct device_node *np;
1296 struct platform_device *pdev;
1297
1298 np = of_find_node_by_path(path);
1299 if (np == NULL)
1300 return NULL;
1301
1302 pdev = of_find_device_by_node(np);
1303 of_node_put(np);
1304
1305 return pdev;
1306}
1307
1308
1309static int of_path_platform_device_exists(const char *path)
1310{
1311 struct platform_device *pdev;
1312
1313 pdev = of_path_to_platform_device(path);
1314 platform_device_put(pdev);
1315 return pdev != NULL;
1316}
1317
1318#if IS_BUILTIN(CONFIG_I2C)
1319
1320
1321static struct i2c_client *of_path_to_i2c_client(const char *path)
1322{
1323 struct device_node *np;
1324 struct i2c_client *client;
1325
1326 np = of_find_node_by_path(path);
1327 if (np == NULL)
1328 return NULL;
1329
1330 client = of_find_i2c_device_by_node(np);
1331 of_node_put(np);
1332
1333 return client;
1334}
1335
1336
1337static int of_path_i2c_client_exists(const char *path)
1338{
1339 struct i2c_client *client;
1340
1341 client = of_path_to_i2c_client(path);
1342 if (client)
1343 put_device(&client->dev);
1344 return client != NULL;
1345}
1346#else
1347static int of_path_i2c_client_exists(const char *path)
1348{
1349 return 0;
1350}
1351#endif
1352
1353enum overlay_type {
1354 PDEV_OVERLAY,
1355 I2C_OVERLAY
1356};
1357
1358static int of_path_device_type_exists(const char *path,
1359 enum overlay_type ovtype)
1360{
1361 switch (ovtype) {
1362 case PDEV_OVERLAY:
1363 return of_path_platform_device_exists(path);
1364 case I2C_OVERLAY:
1365 return of_path_i2c_client_exists(path);
1366 }
1367 return 0;
1368}
1369
1370static const char *unittest_path(int nr, enum overlay_type ovtype)
1371{
1372 const char *base;
1373 static char buf[256];
1374
1375 switch (ovtype) {
1376 case PDEV_OVERLAY:
1377 base = "/testcase-data/overlay-node/test-bus";
1378 break;
1379 case I2C_OVERLAY:
1380 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1381 break;
1382 default:
1383 buf[0] = '\0';
1384 return buf;
1385 }
1386 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1387 buf[sizeof(buf) - 1] = '\0';
1388 return buf;
1389}
1390
1391static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1392{
1393 const char *path;
1394
1395 path = unittest_path(unittest_nr, ovtype);
1396
1397 switch (ovtype) {
1398 case PDEV_OVERLAY:
1399 return of_path_platform_device_exists(path);
1400 case I2C_OVERLAY:
1401 return of_path_i2c_client_exists(path);
1402 }
1403 return 0;
1404}
1405
1406static const char *overlay_name_from_nr(int nr)
1407{
1408 static char buf[256];
1409
1410 snprintf(buf, sizeof(buf) - 1,
1411 "overlay_%d", nr);
1412 buf[sizeof(buf) - 1] = '\0';
1413
1414 return buf;
1415}
1416
1417static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1418
1419
1420#define MAX_UNITTEST_OVERLAYS 256
1421static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1422static int overlay_first_id = -1;
1423
1424static void of_unittest_track_overlay(int id)
1425{
1426 if (overlay_first_id < 0)
1427 overlay_first_id = id;
1428 id -= overlay_first_id;
1429
1430
1431 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1432 overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1433}
1434
1435static void of_unittest_untrack_overlay(int id)
1436{
1437 if (overlay_first_id < 0)
1438 return;
1439 id -= overlay_first_id;
1440 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1441 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1442}
1443
1444static void of_unittest_destroy_tracked_overlays(void)
1445{
1446 int id, ret, defers, ovcs_id;
1447
1448 if (overlay_first_id < 0)
1449 return;
1450
1451
1452 do {
1453 defers = 0;
1454
1455 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1456 if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1457 continue;
1458
1459 ovcs_id = id + overlay_first_id;
1460 ret = of_overlay_remove(&ovcs_id);
1461 if (ret == -ENODEV) {
1462 pr_warn("%s: no overlay to destroy for #%d\n",
1463 __func__, id + overlay_first_id);
1464 continue;
1465 }
1466 if (ret != 0) {
1467 defers++;
1468 pr_warn("%s: overlay destroy failed for #%d\n",
1469 __func__, id + overlay_first_id);
1470 continue;
1471 }
1472
1473 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1474 }
1475 } while (defers > 0);
1476}
1477
1478static int __init of_unittest_apply_overlay(int overlay_nr, int *overlay_id)
1479{
1480 const char *overlay_name;
1481
1482 overlay_name = overlay_name_from_nr(overlay_nr);
1483
1484 if (!overlay_data_apply(overlay_name, overlay_id)) {
1485 unittest(0, "could not apply overlay \"%s\"\n",
1486 overlay_name);
1487 return -EFAULT;
1488 }
1489 of_unittest_track_overlay(*overlay_id);
1490
1491 return 0;
1492}
1493
1494
1495static int __init of_unittest_apply_overlay_check(int overlay_nr,
1496 int unittest_nr, int before, int after,
1497 enum overlay_type ovtype)
1498{
1499 int ret, ovcs_id;
1500
1501
1502 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1503 unittest(0, "%s with device @\"%s\" %s\n",
1504 overlay_name_from_nr(overlay_nr),
1505 unittest_path(unittest_nr, ovtype),
1506 !before ? "enabled" : "disabled");
1507 return -EINVAL;
1508 }
1509
1510 ovcs_id = 0;
1511 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
1512 if (ret != 0) {
1513
1514 return ret;
1515 }
1516
1517
1518 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1519 unittest(0, "%s failed to create @\"%s\" %s\n",
1520 overlay_name_from_nr(overlay_nr),
1521 unittest_path(unittest_nr, ovtype),
1522 !after ? "enabled" : "disabled");
1523 return -EINVAL;
1524 }
1525
1526 return 0;
1527}
1528
1529
1530static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
1531 int unittest_nr, int before, int after,
1532 enum overlay_type ovtype)
1533{
1534 int ret, ovcs_id;
1535
1536
1537 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1538 unittest(0, "%s with device @\"%s\" %s\n",
1539 overlay_name_from_nr(overlay_nr),
1540 unittest_path(unittest_nr, ovtype),
1541 !before ? "enabled" : "disabled");
1542 return -EINVAL;
1543 }
1544
1545
1546 ovcs_id = 0;
1547 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
1548 if (ret != 0) {
1549
1550 return ret;
1551 }
1552
1553
1554 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1555 unittest(0, "%s failed to create @\"%s\" %s\n",
1556 overlay_name_from_nr(overlay_nr),
1557 unittest_path(unittest_nr, ovtype),
1558 !after ? "enabled" : "disabled");
1559 return -EINVAL;
1560 }
1561
1562 ret = of_overlay_remove(&ovcs_id);
1563 if (ret != 0) {
1564 unittest(0, "%s failed to be destroyed @\"%s\"\n",
1565 overlay_name_from_nr(overlay_nr),
1566 unittest_path(unittest_nr, ovtype));
1567 return ret;
1568 }
1569
1570
1571 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1572 unittest(0, "%s with device @\"%s\" %s\n",
1573 overlay_name_from_nr(overlay_nr),
1574 unittest_path(unittest_nr, ovtype),
1575 !before ? "enabled" : "disabled");
1576 return -EINVAL;
1577 }
1578
1579 return 0;
1580}
1581
1582
1583static void __init of_unittest_overlay_0(void)
1584{
1585
1586 if (of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY))
1587 return;
1588
1589 unittest(1, "overlay test %d passed\n", 0);
1590}
1591
1592
1593static void __init of_unittest_overlay_1(void)
1594{
1595
1596 if (of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY))
1597 return;
1598
1599 unittest(1, "overlay test %d passed\n", 1);
1600}
1601
1602
1603static void __init of_unittest_overlay_2(void)
1604{
1605
1606 if (of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY))
1607 return;
1608
1609 unittest(1, "overlay test %d passed\n", 2);
1610}
1611
1612
1613static void __init of_unittest_overlay_3(void)
1614{
1615
1616 if (of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY))
1617 return;
1618
1619 unittest(1, "overlay test %d passed\n", 3);
1620}
1621
1622
1623static void __init of_unittest_overlay_4(void)
1624{
1625
1626 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
1627 return;
1628
1629 unittest(1, "overlay test %d passed\n", 4);
1630}
1631
1632
1633static void __init of_unittest_overlay_5(void)
1634{
1635
1636 if (of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY))
1637 return;
1638
1639 unittest(1, "overlay test %d passed\n", 5);
1640}
1641
1642
1643static void __init of_unittest_overlay_6(void)
1644{
1645 int i, ov_id[2], ovcs_id;
1646 int overlay_nr = 6, unittest_nr = 6;
1647 int before = 0, after = 1;
1648 const char *overlay_name;
1649
1650
1651 for (i = 0; i < 2; i++) {
1652 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1653 != before) {
1654 unittest(0, "%s with device @\"%s\" %s\n",
1655 overlay_name_from_nr(overlay_nr + i),
1656 unittest_path(unittest_nr + i,
1657 PDEV_OVERLAY),
1658 !before ? "enabled" : "disabled");
1659 return;
1660 }
1661 }
1662
1663
1664 for (i = 0; i < 2; i++) {
1665
1666 overlay_name = overlay_name_from_nr(overlay_nr + i);
1667
1668 if (!overlay_data_apply(overlay_name, &ovcs_id)) {
1669 unittest(0, "could not apply overlay \"%s\"\n",
1670 overlay_name);
1671 return;
1672 }
1673 ov_id[i] = ovcs_id;
1674 of_unittest_track_overlay(ov_id[i]);
1675 }
1676
1677 for (i = 0; i < 2; i++) {
1678
1679 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1680 != after) {
1681 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1682 overlay_name_from_nr(overlay_nr + i),
1683 unittest_path(unittest_nr + i,
1684 PDEV_OVERLAY),
1685 !after ? "enabled" : "disabled");
1686 return;
1687 }
1688 }
1689
1690 for (i = 1; i >= 0; i--) {
1691 ovcs_id = ov_id[i];
1692 if (of_overlay_remove(&ovcs_id)) {
1693 unittest(0, "%s failed destroy @\"%s\"\n",
1694 overlay_name_from_nr(overlay_nr + i),
1695 unittest_path(unittest_nr + i,
1696 PDEV_OVERLAY));
1697 return;
1698 }
1699 of_unittest_untrack_overlay(ov_id[i]);
1700 }
1701
1702 for (i = 0; i < 2; i++) {
1703
1704 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1705 != before) {
1706 unittest(0, "%s with device @\"%s\" %s\n",
1707 overlay_name_from_nr(overlay_nr + i),
1708 unittest_path(unittest_nr + i,
1709 PDEV_OVERLAY),
1710 !before ? "enabled" : "disabled");
1711 return;
1712 }
1713 }
1714
1715 unittest(1, "overlay test %d passed\n", 6);
1716}
1717
1718
1719static void __init of_unittest_overlay_8(void)
1720{
1721 int i, ov_id[2], ovcs_id;
1722 int overlay_nr = 8, unittest_nr = 8;
1723 const char *overlay_name;
1724
1725
1726
1727
1728 for (i = 0; i < 2; i++) {
1729
1730 overlay_name = overlay_name_from_nr(overlay_nr + i);
1731
1732 if (!overlay_data_apply(overlay_name, &ovcs_id)) {
1733 unittest(0, "could not apply overlay \"%s\"\n",
1734 overlay_name);
1735 return;
1736 }
1737 ov_id[i] = ovcs_id;
1738 of_unittest_track_overlay(ov_id[i]);
1739 }
1740
1741
1742 ovcs_id = ov_id[0];
1743 if (!of_overlay_remove(&ovcs_id)) {
1744 unittest(0, "%s was destroyed @\"%s\"\n",
1745 overlay_name_from_nr(overlay_nr + 0),
1746 unittest_path(unittest_nr,
1747 PDEV_OVERLAY));
1748 return;
1749 }
1750
1751
1752 for (i = 1; i >= 0; i--) {
1753 ovcs_id = ov_id[i];
1754 if (of_overlay_remove(&ovcs_id)) {
1755 unittest(0, "%s not destroyed @\"%s\"\n",
1756 overlay_name_from_nr(overlay_nr + i),
1757 unittest_path(unittest_nr,
1758 PDEV_OVERLAY));
1759 return;
1760 }
1761 of_unittest_untrack_overlay(ov_id[i]);
1762 }
1763
1764 unittest(1, "overlay test %d passed\n", 8);
1765}
1766
1767
1768static void __init of_unittest_overlay_10(void)
1769{
1770 int ret;
1771 char *child_path;
1772
1773
1774 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1775 if (unittest(ret == 0,
1776 "overlay test %d failed; overlay application\n", 10))
1777 return;
1778
1779 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1780 unittest_path(10, PDEV_OVERLAY));
1781 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1782 return;
1783
1784 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1785 kfree(child_path);
1786
1787 unittest(ret, "overlay test %d failed; no child device\n", 10);
1788}
1789
1790
1791static void __init of_unittest_overlay_11(void)
1792{
1793 int ret;
1794
1795
1796 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1797 PDEV_OVERLAY);
1798 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
1799}
1800
1801#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1802
1803struct unittest_i2c_bus_data {
1804 struct platform_device *pdev;
1805 struct i2c_adapter adap;
1806};
1807
1808static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1809 struct i2c_msg *msgs, int num)
1810{
1811 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1812
1813 (void)std;
1814
1815 return num;
1816}
1817
1818static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1819{
1820 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1821}
1822
1823static const struct i2c_algorithm unittest_i2c_algo = {
1824 .master_xfer = unittest_i2c_master_xfer,
1825 .functionality = unittest_i2c_functionality,
1826};
1827
1828static int unittest_i2c_bus_probe(struct platform_device *pdev)
1829{
1830 struct device *dev = &pdev->dev;
1831 struct device_node *np = dev->of_node;
1832 struct unittest_i2c_bus_data *std;
1833 struct i2c_adapter *adap;
1834 int ret;
1835
1836 if (np == NULL) {
1837 dev_err(dev, "No OF data for device\n");
1838 return -EINVAL;
1839
1840 }
1841
1842 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1843
1844 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1845 if (!std)
1846 return -ENOMEM;
1847
1848
1849 std->pdev = pdev;
1850 platform_set_drvdata(pdev, std);
1851
1852 adap = &std->adap;
1853 i2c_set_adapdata(adap, std);
1854 adap->nr = -1;
1855 strlcpy(adap->name, pdev->name, sizeof(adap->name));
1856 adap->class = I2C_CLASS_DEPRECATED;
1857 adap->algo = &unittest_i2c_algo;
1858 adap->dev.parent = dev;
1859 adap->dev.of_node = dev->of_node;
1860 adap->timeout = 5 * HZ;
1861 adap->retries = 3;
1862
1863 ret = i2c_add_numbered_adapter(adap);
1864 if (ret != 0) {
1865 dev_err(dev, "Failed to add I2C adapter\n");
1866 return ret;
1867 }
1868
1869 return 0;
1870}
1871
1872static int unittest_i2c_bus_remove(struct platform_device *pdev)
1873{
1874 struct device *dev = &pdev->dev;
1875 struct device_node *np = dev->of_node;
1876 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1877
1878 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1879 i2c_del_adapter(&std->adap);
1880
1881 return 0;
1882}
1883
1884static const struct of_device_id unittest_i2c_bus_match[] = {
1885 { .compatible = "unittest-i2c-bus", },
1886 {},
1887};
1888
1889static struct platform_driver unittest_i2c_bus_driver = {
1890 .probe = unittest_i2c_bus_probe,
1891 .remove = unittest_i2c_bus_remove,
1892 .driver = {
1893 .name = "unittest-i2c-bus",
1894 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
1895 },
1896};
1897
1898static int unittest_i2c_dev_probe(struct i2c_client *client,
1899 const struct i2c_device_id *id)
1900{
1901 struct device *dev = &client->dev;
1902 struct device_node *np = client->dev.of_node;
1903
1904 if (!np) {
1905 dev_err(dev, "No OF node\n");
1906 return -EINVAL;
1907 }
1908
1909 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1910
1911 return 0;
1912};
1913
1914static int unittest_i2c_dev_remove(struct i2c_client *client)
1915{
1916 struct device *dev = &client->dev;
1917 struct device_node *np = client->dev.of_node;
1918
1919 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1920 return 0;
1921}
1922
1923static const struct i2c_device_id unittest_i2c_dev_id[] = {
1924 { .name = "unittest-i2c-dev" },
1925 { }
1926};
1927
1928static struct i2c_driver unittest_i2c_dev_driver = {
1929 .driver = {
1930 .name = "unittest-i2c-dev",
1931 },
1932 .probe = unittest_i2c_dev_probe,
1933 .remove = unittest_i2c_dev_remove,
1934 .id_table = unittest_i2c_dev_id,
1935};
1936
1937#if IS_BUILTIN(CONFIG_I2C_MUX)
1938
1939static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
1940{
1941 return 0;
1942}
1943
1944static int unittest_i2c_mux_probe(struct i2c_client *client,
1945 const struct i2c_device_id *id)
1946{
1947 int i, nchans;
1948 struct device *dev = &client->dev;
1949 struct i2c_adapter *adap = client->adapter;
1950 struct device_node *np = client->dev.of_node, *child;
1951 struct i2c_mux_core *muxc;
1952 u32 reg, max_reg;
1953
1954 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1955
1956 if (!np) {
1957 dev_err(dev, "No OF node\n");
1958 return -EINVAL;
1959 }
1960
1961 max_reg = (u32)-1;
1962 for_each_child_of_node(np, child) {
1963 if (of_property_read_u32(child, "reg", ®))
1964 continue;
1965 if (max_reg == (u32)-1 || reg > max_reg)
1966 max_reg = reg;
1967 }
1968 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1969 if (nchans == 0) {
1970 dev_err(dev, "No channels\n");
1971 return -EINVAL;
1972 }
1973
1974 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
1975 unittest_i2c_mux_select_chan, NULL);
1976 if (!muxc)
1977 return -ENOMEM;
1978 for (i = 0; i < nchans; i++) {
1979 if (i2c_mux_add_adapter(muxc, 0, i, 0)) {
1980 dev_err(dev, "Failed to register mux #%d\n", i);
1981 i2c_mux_del_adapters(muxc);
1982 return -ENODEV;
1983 }
1984 }
1985
1986 i2c_set_clientdata(client, muxc);
1987
1988 return 0;
1989};
1990
1991static int unittest_i2c_mux_remove(struct i2c_client *client)
1992{
1993 struct device *dev = &client->dev;
1994 struct device_node *np = client->dev.of_node;
1995 struct i2c_mux_core *muxc = i2c_get_clientdata(client);
1996
1997 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1998 i2c_mux_del_adapters(muxc);
1999 return 0;
2000}
2001
2002static const struct i2c_device_id unittest_i2c_mux_id[] = {
2003 { .name = "unittest-i2c-mux" },
2004 { }
2005};
2006
2007static struct i2c_driver unittest_i2c_mux_driver = {
2008 .driver = {
2009 .name = "unittest-i2c-mux",
2010 },
2011 .probe = unittest_i2c_mux_probe,
2012 .remove = unittest_i2c_mux_remove,
2013 .id_table = unittest_i2c_mux_id,
2014};
2015
2016#endif
2017
2018static int of_unittest_overlay_i2c_init(void)
2019{
2020 int ret;
2021
2022 ret = i2c_add_driver(&unittest_i2c_dev_driver);
2023 if (unittest(ret == 0,
2024 "could not register unittest i2c device driver\n"))
2025 return ret;
2026
2027 ret = platform_driver_register(&unittest_i2c_bus_driver);
2028 if (unittest(ret == 0,
2029 "could not register unittest i2c bus driver\n"))
2030 return ret;
2031
2032#if IS_BUILTIN(CONFIG_I2C_MUX)
2033 ret = i2c_add_driver(&unittest_i2c_mux_driver);
2034 if (unittest(ret == 0,
2035 "could not register unittest i2c mux driver\n"))
2036 return ret;
2037#endif
2038
2039 return 0;
2040}
2041
2042static void of_unittest_overlay_i2c_cleanup(void)
2043{
2044#if IS_BUILTIN(CONFIG_I2C_MUX)
2045 i2c_del_driver(&unittest_i2c_mux_driver);
2046#endif
2047 platform_driver_unregister(&unittest_i2c_bus_driver);
2048 i2c_del_driver(&unittest_i2c_dev_driver);
2049}
2050
2051static void __init of_unittest_overlay_i2c_12(void)
2052{
2053
2054 if (of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY))
2055 return;
2056
2057 unittest(1, "overlay test %d passed\n", 12);
2058}
2059
2060
2061static void __init of_unittest_overlay_i2c_13(void)
2062{
2063
2064 if (of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY))
2065 return;
2066
2067 unittest(1, "overlay test %d passed\n", 13);
2068}
2069
2070
2071static void of_unittest_overlay_i2c_14(void)
2072{
2073}
2074
2075static void __init of_unittest_overlay_i2c_15(void)
2076{
2077
2078 if (of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY))
2079 return;
2080
2081 unittest(1, "overlay test %d passed\n", 15);
2082}
2083
2084#else
2085
2086static inline void of_unittest_overlay_i2c_14(void) { }
2087static inline void of_unittest_overlay_i2c_15(void) { }
2088
2089#endif
2090
2091static void __init of_unittest_overlay(void)
2092{
2093 struct device_node *bus_np = NULL;
2094
2095 if (platform_driver_register(&unittest_driver)) {
2096 unittest(0, "could not register unittest driver\n");
2097 goto out;
2098 }
2099
2100 bus_np = of_find_node_by_path(bus_path);
2101 if (bus_np == NULL) {
2102 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
2103 goto out;
2104 }
2105
2106 if (of_platform_default_populate(bus_np, NULL, NULL)) {
2107 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
2108 goto out;
2109 }
2110
2111 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
2112 unittest(0, "could not find unittest0 @ \"%s\"\n",
2113 unittest_path(100, PDEV_OVERLAY));
2114 goto out;
2115 }
2116
2117 if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
2118 unittest(0, "unittest1 @ \"%s\" should not exist\n",
2119 unittest_path(101, PDEV_OVERLAY));
2120 goto out;
2121 }
2122
2123 unittest(1, "basic infrastructure of overlays passed");
2124
2125
2126 of_unittest_overlay_0();
2127 of_unittest_overlay_1();
2128 of_unittest_overlay_2();
2129 of_unittest_overlay_3();
2130 of_unittest_overlay_4();
2131 of_unittest_overlay_5();
2132 of_unittest_overlay_6();
2133 of_unittest_overlay_8();
2134
2135 of_unittest_overlay_10();
2136 of_unittest_overlay_11();
2137
2138#if IS_BUILTIN(CONFIG_I2C)
2139 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
2140 goto out;
2141
2142 of_unittest_overlay_i2c_12();
2143 of_unittest_overlay_i2c_13();
2144 of_unittest_overlay_i2c_14();
2145 of_unittest_overlay_i2c_15();
2146
2147 of_unittest_overlay_i2c_cleanup();
2148#endif
2149
2150 of_unittest_destroy_tracked_overlays();
2151
2152out:
2153 of_node_put(bus_np);
2154}
2155
2156#else
2157static inline void __init of_unittest_overlay(void) { }
2158#endif
2159
2160#ifdef CONFIG_OF_OVERLAY
2161
2162
2163
2164
2165
2166
2167#define OVERLAY_INFO_EXTERN(name) \
2168 extern uint8_t __dtb_##name##_begin[]; \
2169 extern uint8_t __dtb_##name##_end[]
2170
2171#define OVERLAY_INFO(overlay_name, expected) \
2172{ .dtb_begin = __dtb_##overlay_name##_begin, \
2173 .dtb_end = __dtb_##overlay_name##_end, \
2174 .expected_result = expected, \
2175 .name = #overlay_name, \
2176}
2177
2178struct overlay_info {
2179 uint8_t *dtb_begin;
2180 uint8_t *dtb_end;
2181 int expected_result;
2182 int overlay_id;
2183 char *name;
2184};
2185
2186OVERLAY_INFO_EXTERN(overlay_base);
2187OVERLAY_INFO_EXTERN(overlay);
2188OVERLAY_INFO_EXTERN(overlay_0);
2189OVERLAY_INFO_EXTERN(overlay_1);
2190OVERLAY_INFO_EXTERN(overlay_2);
2191OVERLAY_INFO_EXTERN(overlay_3);
2192OVERLAY_INFO_EXTERN(overlay_4);
2193OVERLAY_INFO_EXTERN(overlay_5);
2194OVERLAY_INFO_EXTERN(overlay_6);
2195OVERLAY_INFO_EXTERN(overlay_7);
2196OVERLAY_INFO_EXTERN(overlay_8);
2197OVERLAY_INFO_EXTERN(overlay_9);
2198OVERLAY_INFO_EXTERN(overlay_10);
2199OVERLAY_INFO_EXTERN(overlay_11);
2200OVERLAY_INFO_EXTERN(overlay_12);
2201OVERLAY_INFO_EXTERN(overlay_13);
2202OVERLAY_INFO_EXTERN(overlay_15);
2203OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
2204OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
2205OVERLAY_INFO_EXTERN(overlay_bad_phandle);
2206OVERLAY_INFO_EXTERN(overlay_bad_symbol);
2207
2208
2209static struct overlay_info overlays[] = {
2210 OVERLAY_INFO(overlay_base, -9999),
2211 OVERLAY_INFO(overlay, 0),
2212 OVERLAY_INFO(overlay_0, 0),
2213 OVERLAY_INFO(overlay_1, 0),
2214 OVERLAY_INFO(overlay_2, 0),
2215 OVERLAY_INFO(overlay_3, 0),
2216 OVERLAY_INFO(overlay_4, 0),
2217 OVERLAY_INFO(overlay_5, 0),
2218 OVERLAY_INFO(overlay_6, 0),
2219 OVERLAY_INFO(overlay_7, 0),
2220 OVERLAY_INFO(overlay_8, 0),
2221 OVERLAY_INFO(overlay_9, 0),
2222 OVERLAY_INFO(overlay_10, 0),
2223 OVERLAY_INFO(overlay_11, 0),
2224 OVERLAY_INFO(overlay_12, 0),
2225 OVERLAY_INFO(overlay_13, 0),
2226 OVERLAY_INFO(overlay_15, 0),
2227 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL),
2228 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL),
2229 OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
2230 OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
2231
2232 {.dtb_begin = NULL, .dtb_end = NULL, .expected_result = 0, .name = NULL}
2233};
2234
2235static struct device_node *overlay_base_root;
2236
2237static void * __init dt_alloc_memory(u64 size, u64 align)
2238{
2239 void *ptr = memblock_alloc(size, align);
2240
2241 if (!ptr)
2242 panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
2243 __func__, size, align);
2244
2245 return ptr;
2246}
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262void __init unittest_unflatten_overlay_base(void)
2263{
2264 struct overlay_info *info;
2265 u32 data_size;
2266 void *new_fdt;
2267 u32 size;
2268 int found = 0;
2269 const char *overlay_name = "overlay_base";
2270
2271 for (info = overlays; info && info->name; info++) {
2272 if (!strcmp(overlay_name, info->name)) {
2273 found = 1;
2274 break;
2275 }
2276 }
2277 if (!found) {
2278 pr_err("no overlay data for %s\n", overlay_name);
2279 return;
2280 }
2281
2282 info = &overlays[0];
2283
2284 if (info->expected_result != -9999) {
2285 pr_err("No dtb 'overlay_base' to attach\n");
2286 return;
2287 }
2288
2289 data_size = info->dtb_end - info->dtb_begin;
2290 if (!data_size) {
2291 pr_err("No dtb 'overlay_base' to attach\n");
2292 return;
2293 }
2294
2295 size = fdt_totalsize(info->dtb_begin);
2296 if (size != data_size) {
2297 pr_err("dtb 'overlay_base' header totalsize != actual size");
2298 return;
2299 }
2300
2301 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
2302 if (!new_fdt) {
2303 pr_err("alloc for dtb 'overlay_base' failed");
2304 return;
2305 }
2306
2307 memcpy(new_fdt, info->dtb_begin, size);
2308
2309 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
2310 dt_alloc_memory, true);
2311}
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324static int __init overlay_data_apply(const char *overlay_name, int *overlay_id)
2325{
2326 struct overlay_info *info;
2327 int found = 0;
2328 int ret;
2329 u32 size;
2330
2331 for (info = overlays; info && info->name; info++) {
2332 if (!strcmp(overlay_name, info->name)) {
2333 found = 1;
2334 break;
2335 }
2336 }
2337 if (!found) {
2338 pr_err("no overlay data for %s\n", overlay_name);
2339 return 0;
2340 }
2341
2342 size = info->dtb_end - info->dtb_begin;
2343 if (!size)
2344 pr_err("no overlay data for %s\n", overlay_name);
2345
2346 ret = of_overlay_fdt_apply(info->dtb_begin, size, &info->overlay_id);
2347 if (overlay_id)
2348 *overlay_id = info->overlay_id;
2349 if (ret < 0)
2350 goto out;
2351
2352 pr_debug("%s applied\n", overlay_name);
2353
2354out:
2355 if (ret != info->expected_result)
2356 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
2357 info->expected_result, ret, overlay_name);
2358
2359 return (ret == info->expected_result);
2360}
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370static __init void of_unittest_overlay_high_level(void)
2371{
2372 struct device_node *last_sibling;
2373 struct device_node *np;
2374 struct device_node *of_symbols;
2375 struct device_node *overlay_base_symbols;
2376 struct device_node **pprev;
2377 struct property *prop;
2378
2379 if (!overlay_base_root) {
2380 unittest(0, "overlay_base_root not initialized\n");
2381 return;
2382 }
2383
2384
2385
2386
2387
2388 of_overlay_mutex_lock();
2389 of_resolve_phandles(overlay_base_root);
2390 of_overlay_mutex_unlock();
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402 pprev = &overlay_base_root->child;
2403 for (np = overlay_base_root->child; np; np = np->sibling) {
2404 if (of_node_name_eq(np, "__local_fixups__")) {
2405 *pprev = np->sibling;
2406 break;
2407 }
2408 pprev = &np->sibling;
2409 }
2410
2411
2412 of_symbols = of_get_child_by_name(of_root, "__symbols__");
2413 if (of_symbols) {
2414
2415 pprev = &overlay_base_root->child;
2416 for (np = overlay_base_root->child; np; np = np->sibling) {
2417 if (of_node_name_eq(np, "__symbols__")) {
2418 overlay_base_symbols = np;
2419 *pprev = np->sibling;
2420 break;
2421 }
2422 pprev = &np->sibling;
2423 }
2424 }
2425
2426 for_each_child_of_node(overlay_base_root, np) {
2427 struct device_node *base_child;
2428 for_each_child_of_node(of_root, base_child) {
2429 if (!strcmp(np->full_name, base_child->full_name)) {
2430 unittest(0, "illegal node name in overlay_base %pOFn",
2431 np);
2432 return;
2433 }
2434 }
2435 }
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445 for (np = overlay_base_root->child; np; np = np->sibling)
2446 np->parent = of_root;
2447
2448 mutex_lock(&of_mutex);
2449
2450 for (last_sibling = np = of_root->child; np; np = np->sibling)
2451 last_sibling = np;
2452
2453 if (last_sibling)
2454 last_sibling->sibling = overlay_base_root->child;
2455 else
2456 of_root->child = overlay_base_root->child;
2457
2458 for_each_of_allnodes_from(overlay_base_root, np)
2459 __of_attach_node_sysfs(np);
2460
2461 if (of_symbols) {
2462 struct property *new_prop;
2463 for_each_property_of_node(overlay_base_symbols, prop) {
2464
2465 new_prop = __of_prop_dup(prop, GFP_KERNEL);
2466 if (!new_prop) {
2467 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
2468 prop->name);
2469 goto err_unlock;
2470 }
2471 if (__of_add_property(of_symbols, new_prop)) {
2472
2473 if (!strcmp(new_prop->name, "name"))
2474 continue;
2475 unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
2476 prop->name);
2477 goto err_unlock;
2478 }
2479 if (__of_add_property_sysfs(of_symbols, new_prop)) {
2480 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
2481 prop->name);
2482 goto err_unlock;
2483 }
2484 }
2485 }
2486
2487 mutex_unlock(&of_mutex);
2488
2489
2490
2491
2492 unittest(overlay_data_apply("overlay", NULL),
2493 "Adding overlay 'overlay' failed\n");
2494
2495 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL),
2496 "Adding overlay 'overlay_bad_add_dup_node' failed\n");
2497
2498 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL),
2499 "Adding overlay 'overlay_bad_add_dup_prop' failed\n");
2500
2501 unittest(overlay_data_apply("overlay_bad_phandle", NULL),
2502 "Adding overlay 'overlay_bad_phandle' failed\n");
2503
2504 unittest(overlay_data_apply("overlay_bad_symbol", NULL),
2505 "Adding overlay 'overlay_bad_symbol' failed\n");
2506
2507 return;
2508
2509err_unlock:
2510 mutex_unlock(&of_mutex);
2511}
2512
2513#else
2514
2515static inline __init void of_unittest_overlay_high_level(void) {}
2516
2517#endif
2518
2519static int __init of_unittest(void)
2520{
2521 struct device_node *np;
2522 int res;
2523
2524
2525
2526 if (IS_ENABLED(CONFIG_UML))
2527 unittest_unflatten_overlay_base();
2528
2529 res = unittest_data_add();
2530 if (res)
2531 return res;
2532 if (!of_aliases)
2533 of_aliases = of_find_node_by_path("/aliases");
2534
2535 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
2536 if (!np) {
2537 pr_info("No testcase data in device tree; not running tests\n");
2538 return 0;
2539 }
2540 of_node_put(np);
2541
2542 pr_info("start of unittest - you will see error messages\n");
2543 of_unittest_check_tree_linkage();
2544 of_unittest_check_phandles();
2545 of_unittest_find_node_by_name();
2546 of_unittest_dynamic();
2547 of_unittest_parse_phandle_with_args();
2548 of_unittest_parse_phandle_with_args_map();
2549 of_unittest_printf();
2550 of_unittest_property_string();
2551 of_unittest_property_copy();
2552 of_unittest_changeset();
2553 of_unittest_parse_interrupts();
2554 of_unittest_parse_interrupts_extended();
2555 of_unittest_match_node();
2556 of_unittest_platform_populate();
2557 of_unittest_overlay();
2558
2559
2560 of_unittest_check_tree_linkage();
2561
2562 of_unittest_overlay_high_level();
2563
2564 pr_info("end of unittest - %i passed, %i failed\n",
2565 unittest_results.passed, unittest_results.failed);
2566
2567 return 0;
2568}
2569late_initcall(of_unittest);
2570
