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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 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);
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/bootmem.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 /* Test if trailing '/' works */
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 /* Test if trailing '/' works on aliases */
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 /* Array of 4 properties for the purpose of testing */
159 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
160 if (!prop) {
161 unittest(0, "kzalloc() failed\n");
162 return;
163 }
164
165 /* Add a new property - should pass*/
166 prop->name = "new-property";
167 prop->value = "new-property-data";
168 prop->length = strlen(prop->value);
169 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
170
171 /* Try to add an existing property - should fail */
172 prop++;
173 prop->name = "new-property";
174 prop->value = "new-property-data-should-fail";
175 prop->length = strlen(prop->value);
176 unittest(of_add_property(np, prop) != 0,
177 "Adding an existing property should have failed\n");
178
179 /* Try to modify an existing property - should pass */
180 prop->value = "modify-property-data-should-pass";
181 prop->length = strlen(prop->value);
182 unittest(of_update_property(np, prop) == 0,
183 "Updating an existing property should have passed\n");
184
185 /* Try to modify non-existent property - should pass*/
186 prop++;
187 prop->name = "modify-property";
188 prop->value = "modify-missing-property-data-should-pass";
189 prop->length = strlen(prop->value);
190 unittest(of_update_property(np, prop) == 0,
191 "Updating a missing property should have passed\n");
192
193 /* Remove property - should pass */
194 unittest(of_remove_property(np, prop) == 0,
195 "Removing a property should have passed\n");
196
197 /* Adding very large property - should pass */
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 %s links to wrong parent %s\n",
216 child->name, np->name);
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 /* Baseline; check conversion with a large size limit */
265 memset(buf, 0xff, buf_size);
266 size = snprintf(buf, buf_size - 2, fmt, np);
267
268 /* use strcmp() instead of strncmp() here to be absolutely sure strings match */
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 /* Make sure length limits work */
274 size++;
275 for (i = 0; i < 2; i++, size--) {
276 /* Clear the buffer, and make sure it works correctly still */
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, "%pOFp", phandle_str);
303 of_unittest_printf_one(np, "%pOFP", "dev@100");
304 of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
305 of_unittest_printf_one(np, "%10pOFP", " dev@100");
306 of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
307 of_unittest_printf_one(of_root, "%pOFP", "/");
308 of_unittest_printf_one(np, "%pOFF", "----");
309 of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
310 of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
311 of_unittest_printf_one(np, "%pOFc", "test-sub-device");
312 of_unittest_printf_one(np, "%pOFC",
313 "\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
314}
315
316struct node_hash {
317 struct hlist_node node;
318 struct device_node *np;
319};
320
321static DEFINE_HASHTABLE(phandle_ht, 8);
322static void __init of_unittest_check_phandles(void)
323{
324 struct device_node *np;
325 struct node_hash *nh;
326 struct hlist_node *tmp;
327 int i, dup_count = 0, phandle_count = 0;
328
329 for_each_of_allnodes(np) {
330 if (!np->phandle)
331 continue;
332
333 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
334 if (nh->np->phandle == np->phandle) {
335 pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
336 np->phandle, nh->np, np);
337 dup_count++;
338 break;
339 }
340 }
341
342 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
343 if (WARN_ON(!nh))
344 return;
345
346 nh->np = np;
347 hash_add(phandle_ht, &nh->node, np->phandle);
348 phandle_count++;
349 }
350 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
351 dup_count, phandle_count);
352
353 /* Clean up */
354 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
355 hash_del(&nh->node);
356 kfree(nh);
357 }
358}
359
360static void __init of_unittest_parse_phandle_with_args(void)
361{
362 struct device_node *np;
363 struct of_phandle_args args;
364 int i, rc;
365
366 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
367 if (!np) {
368 pr_err("missing testcase data\n");
369 return;
370 }
371
372 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
373 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
374
375 for (i = 0; i < 8; i++) {
376 bool passed = true;
377
378 rc = of_parse_phandle_with_args(np, "phandle-list",
379 "#phandle-cells", i, &args);
380
381 /* Test the values from tests-phandle.dtsi */
382 switch (i) {
383 case 0:
384 passed &= !rc;
385 passed &= (args.args_count == 1);
386 passed &= (args.args[0] == (i + 1));
387 break;
388 case 1:
389 passed &= !rc;
390 passed &= (args.args_count == 2);
391 passed &= (args.args[0] == (i + 1));
392 passed &= (args.args[1] == 0);
393 break;
394 case 2:
395 passed &= (rc == -ENOENT);
396 break;
397 case 3:
398 passed &= !rc;
399 passed &= (args.args_count == 3);
400 passed &= (args.args[0] == (i + 1));
401 passed &= (args.args[1] == 4);
402 passed &= (args.args[2] == 3);
403 break;
404 case 4:
405 passed &= !rc;
406 passed &= (args.args_count == 2);
407 passed &= (args.args[0] == (i + 1));
408 passed &= (args.args[1] == 100);
409 break;
410 case 5:
411 passed &= !rc;
412 passed &= (args.args_count == 0);
413 break;
414 case 6:
415 passed &= !rc;
416 passed &= (args.args_count == 1);
417 passed &= (args.args[0] == (i + 1));
418 break;
419 case 7:
420 passed &= (rc == -ENOENT);
421 break;
422 default:
423 passed = false;
424 }
425
426 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
427 i, args.np, rc);
428 }
429
430 /* Check for missing list property */
431 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
432 "#phandle-cells", 0, &args);
433 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
434 rc = of_count_phandle_with_args(np, "phandle-list-missing",
435 "#phandle-cells");
436 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
437
438 /* Check for missing cells property */
439 rc = of_parse_phandle_with_args(np, "phandle-list",
440 "#phandle-cells-missing", 0, &args);
441 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
442 rc = of_count_phandle_with_args(np, "phandle-list",
443 "#phandle-cells-missing");
444 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
445
446 /* Check for bad phandle in list */
447 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
448 "#phandle-cells", 0, &args);
449 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
450 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
451 "#phandle-cells");
452 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
453
454 /* Check for incorrectly formed argument list */
455 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
456 "#phandle-cells", 1, &args);
457 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
458 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
459 "#phandle-cells");
460 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
461}
462
463static void __init of_unittest_parse_phandle_with_args_map(void)
464{
465 struct device_node *np, *p0, *p1, *p2, *p3;
466 struct of_phandle_args args;
467 int i, rc;
468
469 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
470 if (!np) {
471 pr_err("missing testcase data\n");
472 return;
473 }
474
475 p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
476 if (!p0) {
477 pr_err("missing testcase data\n");
478 return;
479 }
480
481 p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
482 if (!p1) {
483 pr_err("missing testcase data\n");
484 return;
485 }
486
487 p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
488 if (!p2) {
489 pr_err("missing testcase data\n");
490 return;
491 }
492
493 p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
494 if (!p3) {
495 pr_err("missing testcase data\n");
496 return;
497 }
498
499 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
500 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
501
502 for (i = 0; i < 8; i++) {
503 bool passed = true;
504
505 rc = of_parse_phandle_with_args_map(np, "phandle-list",
506 "phandle", i, &args);
507
508 /* Test the values from tests-phandle.dtsi */
509 switch (i) {
510 case 0:
511 passed &= !rc;
512 passed &= (args.np == p1);
513 passed &= (args.args_count == 1);
514 passed &= (args.args[0] == 1);
515 break;
516 case 1:
517 passed &= !rc;
518 passed &= (args.np == p3);
519 passed &= (args.args_count == 3);
520 passed &= (args.args[0] == 2);
521 passed &= (args.args[1] == 5);
522 passed &= (args.args[2] == 3);
523 break;
524 case 2:
525 passed &= (rc == -ENOENT);
526 break;
527 case 3:
528 passed &= !rc;
529 passed &= (args.np == p0);
530 passed &= (args.args_count == 0);
531 break;
532 case 4:
533 passed &= !rc;
534 passed &= (args.np == p1);
535 passed &= (args.args_count == 1);
536 passed &= (args.args[0] == 3);
537 break;
538 case 5:
539 passed &= !rc;
540 passed &= (args.np == p0);
541 passed &= (args.args_count == 0);
542 break;
543 case 6:
544 passed &= !rc;
545 passed &= (args.np == p2);
546 passed &= (args.args_count == 2);
547 passed &= (args.args[0] == 15);
548 passed &= (args.args[1] == 0x20);
549 break;
550 case 7:
551 passed &= (rc == -ENOENT);
552 break;
553 default:
554 passed = false;
555 }
556
557 unittest(passed, "index %i - data error on node %s rc=%i\n",
558 i, args.np->full_name, rc);
559 }
560
561 /* Check for missing list property */
562 rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
563 "phandle", 0, &args);
564 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
565
566 /* Check for missing cells,map,mask property */
567 rc = of_parse_phandle_with_args_map(np, "phandle-list",
568 "phandle-missing", 0, &args);
569 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
570
571 /* Check for bad phandle in list */
572 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
573 "phandle", 0, &args);
574 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
575
576 /* Check for incorrectly formed argument list */
577 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
578 "phandle", 1, &args);
579 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
580}
581
582static void __init of_unittest_property_string(void)
583{
584 const char *strings[4];
585 struct device_node *np;
586 int rc;
587
588 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
589 if (!np) {
590 pr_err("No testcase data in device tree\n");
591 return;
592 }
593
594 rc = of_property_match_string(np, "phandle-list-names", "first");
595 unittest(rc == 0, "first expected:0 got:%i\n", rc);
596 rc = of_property_match_string(np, "phandle-list-names", "second");
597 unittest(rc == 1, "second expected:1 got:%i\n", rc);
598 rc = of_property_match_string(np, "phandle-list-names", "third");
599 unittest(rc == 2, "third expected:2 got:%i\n", rc);
600 rc = of_property_match_string(np, "phandle-list-names", "fourth");
601 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
602 rc = of_property_match_string(np, "missing-property", "blah");
603 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
604 rc = of_property_match_string(np, "empty-property", "blah");
605 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
606 rc = of_property_match_string(np, "unterminated-string", "blah");
607 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
608
609 /* of_property_count_strings() tests */
610 rc = of_property_count_strings(np, "string-property");
611 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
612 rc = of_property_count_strings(np, "phandle-list-names");
613 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
614 rc = of_property_count_strings(np, "unterminated-string");
615 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
616 rc = of_property_count_strings(np, "unterminated-string-list");
617 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
618
619 /* of_property_read_string_index() tests */
620 rc = of_property_read_string_index(np, "string-property", 0, strings);
621 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
622 strings[0] = NULL;
623 rc = of_property_read_string_index(np, "string-property", 1, strings);
624 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
625 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
626 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
627 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
628 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
629 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
630 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
631 strings[0] = NULL;
632 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
633 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
634 strings[0] = NULL;
635 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
636 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
637 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
638 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
639 strings[0] = NULL;
640 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
641 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
642 strings[1] = NULL;
643
644 /* of_property_read_string_array() tests */
645 rc = of_property_read_string_array(np, "string-property", strings, 4);
646 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
647 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
648 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
649 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
650 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
651 /* -- An incorrectly formed string should cause a failure */
652 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
653 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
654 /* -- parsing the correctly formed strings should still work: */
655 strings[2] = NULL;
656 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
657 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
658 strings[1] = NULL;
659 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
660 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
661}
662
663#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
664 (p1)->value && (p2)->value && \
665 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
666 !strcmp((p1)->name, (p2)->name))
667static void __init of_unittest_property_copy(void)
668{
669#ifdef CONFIG_OF_DYNAMIC
670 struct property p1 = { .name = "p1", .length = 0, .value = "" };
671 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
672 struct property *new;
673
674 new = __of_prop_dup(&p1, GFP_KERNEL);
675 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
676 kfree(new->value);
677 kfree(new->name);
678 kfree(new);
679
680 new = __of_prop_dup(&p2, GFP_KERNEL);
681 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
682 kfree(new->value);
683 kfree(new->name);
684 kfree(new);
685#endif
686}
687
688static void __init of_unittest_changeset(void)
689{
690#ifdef CONFIG_OF_DYNAMIC
691 struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" };
692 struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" };
693 struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" };
694 struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" };
695 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
696 struct property *ppremove;
697 struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np;
698 struct of_changeset chgset;
699
700 n1 = __of_node_dup(NULL, "n1");
701 unittest(n1, "testcase setup failure\n");
702
703 n2 = __of_node_dup(NULL, "n2");
704 unittest(n2, "testcase setup failure\n");
705
706 n21 = __of_node_dup(NULL, "n21");
707 unittest(n21, "testcase setup failure %p\n", n21);
708
709 nchangeset = of_find_node_by_path("/testcase-data/changeset");
710 nremove = of_get_child_by_name(nchangeset, "node-remove");
711 unittest(nremove, "testcase setup failure\n");
712
713 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
714 unittest(ppadd, "testcase setup failure\n");
715
716 ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL);
717 unittest(ppname_n1, "testcase setup failure\n");
718
719 ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL);
720 unittest(ppname_n2, "testcase setup failure\n");
721
722 ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
723 unittest(ppname_n21, "testcase setup failure\n");
724
725 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
726 unittest(ppupdate, "testcase setup failure\n");
727
728 parent = nchangeset;
729 n1->parent = parent;
730 n2->parent = parent;
731 n21->parent = n2;
732
733 ppremove = of_find_property(parent, "prop-remove", NULL);
734 unittest(ppremove, "failed to find removal prop");
735
736 of_changeset_init(&chgset);
737
738 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
739 unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n");
740
741 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
742 unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n");
743
744 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
745 unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n");
746
747 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
748
749 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n");
750 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
751 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
752
753 unittest(!of_changeset_apply(&chgset), "apply failed\n");
754
755 of_node_put(nchangeset);
756
757 /* Make sure node names are constructed correctly */
758 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
759 "'%pOF' not added\n", n21);
760 of_node_put(np);
761
762 unittest(!of_changeset_revert(&chgset), "revert failed\n");
763
764 of_changeset_destroy(&chgset);
765#endif
766}
767
768static void __init of_unittest_parse_interrupts(void)
769{
770 struct device_node *np;
771 struct of_phandle_args args;
772 int i, rc;
773
774 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
775 if (!np) {
776 pr_err("missing testcase data\n");
777 return;
778 }
779
780 for (i = 0; i < 4; i++) {
781 bool passed = true;
782
783 args.args_count = 0;
784 rc = of_irq_parse_one(np, i, &args);
785
786 passed &= !rc;
787 passed &= (args.args_count == 1);
788 passed &= (args.args[0] == (i + 1));
789
790 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
791 i, args.np, rc);
792 }
793 of_node_put(np);
794
795 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
796 if (!np) {
797 pr_err("missing testcase data\n");
798 return;
799 }
800
801 for (i = 0; i < 4; i++) {
802 bool passed = true;
803
804 args.args_count = 0;
805 rc = of_irq_parse_one(np, i, &args);
806
807 /* Test the values from tests-phandle.dtsi */
808 switch (i) {
809 case 0:
810 passed &= !rc;
811 passed &= (args.args_count == 1);
812 passed &= (args.args[0] == 9);
813 break;
814 case 1:
815 passed &= !rc;
816 passed &= (args.args_count == 3);
817 passed &= (args.args[0] == 10);
818 passed &= (args.args[1] == 11);
819 passed &= (args.args[2] == 12);
820 break;
821 case 2:
822 passed &= !rc;
823 passed &= (args.args_count == 2);
824 passed &= (args.args[0] == 13);
825 passed &= (args.args[1] == 14);
826 break;
827 case 3:
828 passed &= !rc;
829 passed &= (args.args_count == 2);
830 passed &= (args.args[0] == 15);
831 passed &= (args.args[1] == 16);
832 break;
833 default:
834 passed = false;
835 }
836 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
837 i, args.np, rc);
838 }
839 of_node_put(np);
840}
841
842static void __init of_unittest_parse_interrupts_extended(void)
843{
844 struct device_node *np;
845 struct of_phandle_args args;
846 int i, rc;
847
848 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
849 if (!np) {
850 pr_err("missing testcase data\n");
851 return;
852 }
853
854 for (i = 0; i < 7; i++) {
855 bool passed = true;
856
857 rc = of_irq_parse_one(np, i, &args);
858
859 /* Test the values from tests-phandle.dtsi */
860 switch (i) {
861 case 0:
862 passed &= !rc;
863 passed &= (args.args_count == 1);
864 passed &= (args.args[0] == 1);
865 break;
866 case 1:
867 passed &= !rc;
868 passed &= (args.args_count == 3);
869 passed &= (args.args[0] == 2);
870 passed &= (args.args[1] == 3);
871 passed &= (args.args[2] == 4);
872 break;
873 case 2:
874 passed &= !rc;
875 passed &= (args.args_count == 2);
876 passed &= (args.args[0] == 5);
877 passed &= (args.args[1] == 6);
878 break;
879 case 3:
880 passed &= !rc;
881 passed &= (args.args_count == 1);
882 passed &= (args.args[0] == 9);
883 break;
884 case 4:
885 passed &= !rc;
886 passed &= (args.args_count == 3);
887 passed &= (args.args[0] == 10);
888 passed &= (args.args[1] == 11);
889 passed &= (args.args[2] == 12);
890 break;
891 case 5:
892 passed &= !rc;
893 passed &= (args.args_count == 2);
894 passed &= (args.args[0] == 13);
895 passed &= (args.args[1] == 14);
896 break;
897 case 6:
898 passed &= !rc;
899 passed &= (args.args_count == 1);
900 passed &= (args.args[0] == 15);
901 break;
902 default:
903 passed = false;
904 }
905
906 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
907 i, args.np, rc);
908 }
909 of_node_put(np);
910}
911
912static const struct of_device_id match_node_table[] = {
913 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
914 { .data = "B", .type = "type1", }, /* followed by type alone */
915
916 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
917 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
918 { .data = "Cc", .name = "name2", .type = "type2", },
919
920 { .data = "E", .compatible = "compat3" },
921 { .data = "G", .compatible = "compat2", },
922 { .data = "H", .compatible = "compat2", .name = "name5", },
923 { .data = "I", .compatible = "compat2", .type = "type1", },
924 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
925 { .data = "K", .compatible = "compat2", .name = "name9", },
926 {}
927};
928
929static struct {
930 const char *path;
931 const char *data;
932} match_node_tests[] = {
933 { .path = "/testcase-data/match-node/name0", .data = "A", },
934 { .path = "/testcase-data/match-node/name1", .data = "B", },
935 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
936 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
937 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
938 { .path = "/testcase-data/match-node/name3", .data = "E", },
939 { .path = "/testcase-data/match-node/name4", .data = "G", },
940 { .path = "/testcase-data/match-node/name5", .data = "H", },
941 { .path = "/testcase-data/match-node/name6", .data = "G", },
942 { .path = "/testcase-data/match-node/name7", .data = "I", },
943 { .path = "/testcase-data/match-node/name8", .data = "J", },
944 { .path = "/testcase-data/match-node/name9", .data = "K", },
945};
946
947static void __init of_unittest_match_node(void)
948{
949 struct device_node *np;
950 const struct of_device_id *match;
951 int i;
952
953 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
954 np = of_find_node_by_path(match_node_tests[i].path);
955 if (!np) {
956 unittest(0, "missing testcase node %s\n",
957 match_node_tests[i].path);
958 continue;
959 }
960
961 match = of_match_node(match_node_table, np);
962 if (!match) {
963 unittest(0, "%s didn't match anything\n",
964 match_node_tests[i].path);
965 continue;
966 }
967
968 if (strcmp(match->data, match_node_tests[i].data) != 0) {
969 unittest(0, "%s got wrong match. expected %s, got %s\n",
970 match_node_tests[i].path, match_node_tests[i].data,
971 (const char *)match->data);
972 continue;
973 }
974 unittest(1, "passed");
975 }
976}
977
978static struct resource test_bus_res = {
979 .start = 0xfffffff8,
980 .end = 0xfffffff9,
981 .flags = IORESOURCE_MEM,
982};
983static const struct platform_device_info test_bus_info = {
984 .name = "unittest-bus",
985};
986static void __init of_unittest_platform_populate(void)
987{
988 int irq, rc;
989 struct device_node *np, *child, *grandchild;
990 struct platform_device *pdev, *test_bus;
991 const struct of_device_id match[] = {
992 { .compatible = "test-device", },
993 {}
994 };
995
996 np = of_find_node_by_path("/testcase-data");
997 of_platform_default_populate(np, NULL, NULL);
998
999 /* Test that a missing irq domain returns -EPROBE_DEFER */
1000 np = of_find_node_by_path("/testcase-data/testcase-device1");
1001 pdev = of_find_device_by_node(np);
1002 unittest(pdev, "device 1 creation failed\n");
1003
1004 irq = platform_get_irq(pdev, 0);
1005 unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
1006
1007 /* Test that a parsing failure does not return -EPROBE_DEFER */
1008 np = of_find_node_by_path("/testcase-data/testcase-device2");
1009 pdev = of_find_device_by_node(np);
1010 unittest(pdev, "device 2 creation failed\n");
1011 irq = platform_get_irq(pdev, 0);
1012 unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
1013
1014 np = of_find_node_by_path("/testcase-data/platform-tests");
1015 unittest(np, "No testcase data in device tree\n");
1016 if (!np)
1017 return;
1018
1019 test_bus = platform_device_register_full(&test_bus_info);
1020 rc = PTR_ERR_OR_ZERO(test_bus);
1021 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
1022 if (rc)
1023 return;
1024 test_bus->dev.of_node = np;
1025
1026 /*
1027 * Add a dummy resource to the test bus node after it is
1028 * registered to catch problems with un-inserted resources. The
1029 * DT code doesn't insert the resources, and it has caused the
1030 * kernel to oops in the past. This makes sure the same bug
1031 * doesn't crop up again.
1032 */
1033 platform_device_add_resources(test_bus, &test_bus_res, 1);
1034
1035 of_platform_populate(np, match, NULL, &test_bus->dev);
1036 for_each_child_of_node(np, child) {
1037 for_each_child_of_node(child, grandchild)
1038 unittest(of_find_device_by_node(grandchild),
1039 "Could not create device for node '%s'\n",
1040 grandchild->name);
1041 }
1042
1043 of_platform_depopulate(&test_bus->dev);
1044 for_each_child_of_node(np, child) {
1045 for_each_child_of_node(child, grandchild)
1046 unittest(!of_find_device_by_node(grandchild),
1047 "device didn't get destroyed '%s'\n",
1048 grandchild->name);
1049 }
1050
1051 platform_device_unregister(test_bus);
1052 of_node_put(np);
1053}
1054
1055/**
1056 * update_node_properties - adds the properties
1057 * of np into dup node (present in live tree) and
1058 * updates parent of children of np to dup.
1059 *
1060 * @np: node already present in live tree
1061 * @dup: node present in live tree to be updated
1062 */
1063static void update_node_properties(struct device_node *np,
1064 struct device_node *dup)
1065{
1066 struct property *prop;
1067 struct device_node *child;
1068
1069 for_each_property_of_node(np, prop)
1070 of_add_property(dup, prop);
1071
1072 for_each_child_of_node(np, child)
1073 child->parent = dup;
1074}
1075
1076/**
1077 * attach_node_and_children - attaches nodes
1078 * and its children to live tree
1079 *
1080 * @np: Node to attach to live tree
1081 */
1082static int attach_node_and_children(struct device_node *np)
1083{
1084 struct device_node *next, *dup, *child;
1085 unsigned long flags;
1086 const char *full_name;
1087
1088 full_name = kasprintf(GFP_KERNEL, "%pOF", np);
1089 dup = of_find_node_by_path(full_name);
1090 kfree(full_name);
1091 if (dup) {
1092 update_node_properties(np, dup);
1093 return 0;
1094 }
1095
1096 child = np->child;
1097 np->child = NULL;
1098
1099 mutex_lock(&of_mutex);
1100 raw_spin_lock_irqsave(&devtree_lock, flags);
1101 np->sibling = np->parent->child;
1102 np->parent->child = np;
1103 of_node_clear_flag(np, OF_DETACHED);
1104 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1105
1106 __of_attach_node_sysfs(np);
1107 mutex_unlock(&of_mutex);
1108
1109 while (child) {
1110 next = child->sibling;
1111 attach_node_and_children(child);
1112 child = next;
1113 }
1114
1115 return 0;
1116}
1117
1118/**
1119 * unittest_data_add - Reads, copies data from
1120 * linked tree and attaches it to the live tree
1121 */
1122static int __init unittest_data_add(void)
1123{
1124 void *unittest_data;
1125 struct device_node *unittest_data_node, *np;
1126 /*
1127 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
1128 * created by cmd_dt_S_dtb in scripts/Makefile.lib
1129 */
1130 extern uint8_t __dtb_testcases_begin[];
1131 extern uint8_t __dtb_testcases_end[];
1132 const int size = __dtb_testcases_end - __dtb_testcases_begin;
1133 int rc;
1134
1135 if (!size) {
1136 pr_warn("%s: No testcase data to attach; not running tests\n",
1137 __func__);
1138 return -ENODATA;
1139 }
1140
1141 /* creating copy */
1142 unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
1143
1144 if (!unittest_data) {
1145 pr_warn("%s: Failed to allocate memory for unittest_data; "
1146 "not running tests\n", __func__);
1147 return -ENOMEM;
1148 }
1149 of_fdt_unflatten_tree(unittest_data, NULL, &unittest_data_node);
1150 if (!unittest_data_node) {
1151 pr_warn("%s: No tree to attach; not running tests\n", __func__);
1152 return -ENODATA;
1153 }
1154
1155 /*
1156 * This lock normally encloses of_resolve_phandles()
1157 */
1158 of_overlay_mutex_lock();
1159
1160 rc = of_resolve_phandles(unittest_data_node);
1161 if (rc) {
1162 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
1163 of_overlay_mutex_unlock();
1164 return -EINVAL;
1165 }
1166
1167 if (!of_root) {
1168 of_root = unittest_data_node;
1169 for_each_of_allnodes(np)
1170 __of_attach_node_sysfs(np);
1171 of_aliases = of_find_node_by_path("/aliases");
1172 of_chosen = of_find_node_by_path("/chosen");
1173 of_overlay_mutex_unlock();
1174 return 0;
1175 }
1176
1177 /* attach the sub-tree to live tree */
1178 np = unittest_data_node->child;
1179 while (np) {
1180 struct device_node *next = np->sibling;
1181
1182 np->parent = of_root;
1183 attach_node_and_children(np);
1184 np = next;
1185 }
1186
1187 of_overlay_mutex_unlock();
1188
1189 return 0;
1190}
1191
1192#ifdef CONFIG_OF_OVERLAY
1193static int __init overlay_data_apply(const char *overlay_name, int *overlay_id);
1194
1195static int unittest_probe(struct platform_device *pdev)
1196{
1197 struct device *dev = &pdev->dev;
1198 struct device_node *np = dev->of_node;
1199
1200 if (np == NULL) {
1201 dev_err(dev, "No OF data for device\n");
1202 return -EINVAL;
1203
1204 }
1205
1206 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1207
1208 of_platform_populate(np, NULL, NULL, &pdev->dev);
1209
1210 return 0;
1211}
1212
1213static int unittest_remove(struct platform_device *pdev)
1214{
1215 struct device *dev = &pdev->dev;
1216 struct device_node *np = dev->of_node;
1217
1218 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1219 return 0;
1220}
1221
1222static const struct of_device_id unittest_match[] = {
1223 { .compatible = "unittest", },
1224 {},
1225};
1226
1227static struct platform_driver unittest_driver = {
1228 .probe = unittest_probe,
1229 .remove = unittest_remove,
1230 .driver = {
1231 .name = "unittest",
1232 .of_match_table = of_match_ptr(unittest_match),
1233 },
1234};
1235
1236/* get the platform device instantiated at the path */
1237static struct platform_device *of_path_to_platform_device(const char *path)
1238{
1239 struct device_node *np;
1240 struct platform_device *pdev;
1241
1242 np = of_find_node_by_path(path);
1243 if (np == NULL)
1244 return NULL;
1245
1246 pdev = of_find_device_by_node(np);
1247 of_node_put(np);
1248
1249 return pdev;
1250}
1251
1252/* find out if a platform device exists at that path */
1253static int of_path_platform_device_exists(const char *path)
1254{
1255 struct platform_device *pdev;
1256
1257 pdev = of_path_to_platform_device(path);
1258 platform_device_put(pdev);
1259 return pdev != NULL;
1260}
1261
1262#if IS_BUILTIN(CONFIG_I2C)
1263
1264/* get the i2c client device instantiated at the path */
1265static struct i2c_client *of_path_to_i2c_client(const char *path)
1266{
1267 struct device_node *np;
1268 struct i2c_client *client;
1269
1270 np = of_find_node_by_path(path);
1271 if (np == NULL)
1272 return NULL;
1273
1274 client = of_find_i2c_device_by_node(np);
1275 of_node_put(np);
1276
1277 return client;
1278}
1279
1280/* find out if a i2c client device exists at that path */
1281static int of_path_i2c_client_exists(const char *path)
1282{
1283 struct i2c_client *client;
1284
1285 client = of_path_to_i2c_client(path);
1286 if (client)
1287 put_device(&client->dev);
1288 return client != NULL;
1289}
1290#else
1291static int of_path_i2c_client_exists(const char *path)
1292{
1293 return 0;
1294}
1295#endif
1296
1297enum overlay_type {
1298 PDEV_OVERLAY,
1299 I2C_OVERLAY
1300};
1301
1302static int of_path_device_type_exists(const char *path,
1303 enum overlay_type ovtype)
1304{
1305 switch (ovtype) {
1306 case PDEV_OVERLAY:
1307 return of_path_platform_device_exists(path);
1308 case I2C_OVERLAY:
1309 return of_path_i2c_client_exists(path);
1310 }
1311 return 0;
1312}
1313
1314static const char *unittest_path(int nr, enum overlay_type ovtype)
1315{
1316 const char *base;
1317 static char buf[256];
1318
1319 switch (ovtype) {
1320 case PDEV_OVERLAY:
1321 base = "/testcase-data/overlay-node/test-bus";
1322 break;
1323 case I2C_OVERLAY:
1324 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1325 break;
1326 default:
1327 buf[0] = '\0';
1328 return buf;
1329 }
1330 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1331 buf[sizeof(buf) - 1] = '\0';
1332 return buf;
1333}
1334
1335static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1336{
1337 const char *path;
1338
1339 path = unittest_path(unittest_nr, ovtype);
1340
1341 switch (ovtype) {
1342 case PDEV_OVERLAY:
1343 return of_path_platform_device_exists(path);
1344 case I2C_OVERLAY:
1345 return of_path_i2c_client_exists(path);
1346 }
1347 return 0;
1348}
1349
1350static const char *overlay_name_from_nr(int nr)
1351{
1352 static char buf[256];
1353
1354 snprintf(buf, sizeof(buf) - 1,
1355 "overlay_%d", nr);
1356 buf[sizeof(buf) - 1] = '\0';
1357
1358 return buf;
1359}
1360
1361static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1362
1363/* it is guaranteed that overlay ids are assigned in sequence */
1364#define MAX_UNITTEST_OVERLAYS 256
1365static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1366static int overlay_first_id = -1;
1367
1368static void of_unittest_track_overlay(int id)
1369{
1370 if (overlay_first_id < 0)
1371 overlay_first_id = id;
1372 id -= overlay_first_id;
1373
1374 /* we shouldn't need that many */
1375 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1376 overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1377}
1378
1379static void of_unittest_untrack_overlay(int id)
1380{
1381 if (overlay_first_id < 0)
1382 return;
1383 id -= overlay_first_id;
1384 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1385 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1386}
1387
1388static void of_unittest_destroy_tracked_overlays(void)
1389{
1390 int id, ret, defers, ovcs_id;
1391
1392 if (overlay_first_id < 0)
1393 return;
1394
1395 /* try until no defers */
1396 do {
1397 defers = 0;
1398 /* remove in reverse order */
1399 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1400 if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1401 continue;
1402
1403 ovcs_id = id + overlay_first_id;
1404 ret = of_overlay_remove(&ovcs_id);
1405 if (ret == -ENODEV) {
1406 pr_warn("%s: no overlay to destroy for #%d\n",
1407 __func__, id + overlay_first_id);
1408 continue;
1409 }
1410 if (ret != 0) {
1411 defers++;
1412 pr_warn("%s: overlay destroy failed for #%d\n",
1413 __func__, id + overlay_first_id);
1414 continue;
1415 }
1416
1417 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1418 }
1419 } while (defers > 0);
1420}
1421
1422static int __init of_unittest_apply_overlay(int overlay_nr, int unittest_nr,
1423 int *overlay_id)
1424{
1425 const char *overlay_name;
1426
1427 overlay_name = overlay_name_from_nr(overlay_nr);
1428
1429 if (!overlay_data_apply(overlay_name, overlay_id)) {
1430 unittest(0, "could not apply overlay \"%s\"\n",
1431 overlay_name);
1432 return -EFAULT;
1433 }
1434 of_unittest_track_overlay(*overlay_id);
1435
1436 return 0;
1437}
1438
1439/* apply an overlay while checking before and after states */
1440static int __init of_unittest_apply_overlay_check(int overlay_nr,
1441 int unittest_nr, int before, int after,
1442 enum overlay_type ovtype)
1443{
1444 int ret, ovcs_id;
1445
1446 /* unittest device must not be in before state */
1447 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1448 unittest(0, "%s with device @\"%s\" %s\n",
1449 overlay_name_from_nr(overlay_nr),
1450 unittest_path(unittest_nr, ovtype),
1451 !before ? "enabled" : "disabled");
1452 return -EINVAL;
1453 }
1454
1455 ovcs_id = 0;
1456 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ovcs_id);
1457 if (ret != 0) {
1458 /* of_unittest_apply_overlay already called unittest() */
1459 return ret;
1460 }
1461
1462 /* unittest device must be to set to after state */
1463 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1464 unittest(0, "%s failed to create @\"%s\" %s\n",
1465 overlay_name_from_nr(overlay_nr),
1466 unittest_path(unittest_nr, ovtype),
1467 !after ? "enabled" : "disabled");
1468 return -EINVAL;
1469 }
1470
1471 return 0;
1472}
1473
1474/* apply an overlay and then revert it while checking before, after states */
1475static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
1476 int unittest_nr, int before, int after,
1477 enum overlay_type ovtype)
1478{
1479 int ret, ovcs_id;
1480
1481 /* unittest device must be in before state */
1482 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1483 unittest(0, "%s with device @\"%s\" %s\n",
1484 overlay_name_from_nr(overlay_nr),
1485 unittest_path(unittest_nr, ovtype),
1486 !before ? "enabled" : "disabled");
1487 return -EINVAL;
1488 }
1489
1490 /* apply the overlay */
1491 ovcs_id = 0;
1492 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ovcs_id);
1493 if (ret != 0) {
1494 /* of_unittest_apply_overlay already called unittest() */
1495 return ret;
1496 }
1497
1498 /* unittest device must be in after state */
1499 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1500 unittest(0, "%s failed to create @\"%s\" %s\n",
1501 overlay_name_from_nr(overlay_nr),
1502 unittest_path(unittest_nr, ovtype),
1503 !after ? "enabled" : "disabled");
1504 return -EINVAL;
1505 }
1506
1507 ret = of_overlay_remove(&ovcs_id);
1508 if (ret != 0) {
1509 unittest(0, "%s failed to be destroyed @\"%s\"\n",
1510 overlay_name_from_nr(overlay_nr),
1511 unittest_path(unittest_nr, ovtype));
1512 return ret;
1513 }
1514
1515 /* unittest device must be again in before state */
1516 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1517 unittest(0, "%s with device @\"%s\" %s\n",
1518 overlay_name_from_nr(overlay_nr),
1519 unittest_path(unittest_nr, ovtype),
1520 !before ? "enabled" : "disabled");
1521 return -EINVAL;
1522 }
1523
1524 return 0;
1525}
1526
1527/* test activation of device */
1528static void __init of_unittest_overlay_0(void)
1529{
1530 /* device should enable */
1531 if (of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY))
1532 return;
1533
1534 unittest(1, "overlay test %d passed\n", 0);
1535}
1536
1537/* test deactivation of device */
1538static void __init of_unittest_overlay_1(void)
1539{
1540 /* device should disable */
1541 if (of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY))
1542 return;
1543
1544 unittest(1, "overlay test %d passed\n", 1);
1545}
1546
1547/* test activation of device */
1548static void __init of_unittest_overlay_2(void)
1549{
1550 /* device should enable */
1551 if (of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY))
1552 return;
1553
1554 unittest(1, "overlay test %d passed\n", 2);
1555}
1556
1557/* test deactivation of device */
1558static void __init of_unittest_overlay_3(void)
1559{
1560 /* device should disable */
1561 if (of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY))
1562 return;
1563
1564 unittest(1, "overlay test %d passed\n", 3);
1565}
1566
1567/* test activation of a full device node */
1568static void __init of_unittest_overlay_4(void)
1569{
1570 /* device should disable */
1571 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
1572 return;
1573
1574 unittest(1, "overlay test %d passed\n", 4);
1575}
1576
1577/* test overlay apply/revert sequence */
1578static void __init of_unittest_overlay_5(void)
1579{
1580 /* device should disable */
1581 if (of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY))
1582 return;
1583
1584 unittest(1, "overlay test %d passed\n", 5);
1585}
1586
1587/* test overlay application in sequence */
1588static void __init of_unittest_overlay_6(void)
1589{
1590 int i, ov_id[2], ovcs_id;
1591 int overlay_nr = 6, unittest_nr = 6;
1592 int before = 0, after = 1;
1593 const char *overlay_name;
1594
1595 /* unittest device must be in before state */
1596 for (i = 0; i < 2; i++) {
1597 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1598 != before) {
1599 unittest(0, "%s with device @\"%s\" %s\n",
1600 overlay_name_from_nr(overlay_nr + i),
1601 unittest_path(unittest_nr + i,
1602 PDEV_OVERLAY),
1603 !before ? "enabled" : "disabled");
1604 return;
1605 }
1606 }
1607
1608 /* apply the overlays */
1609 for (i = 0; i < 2; i++) {
1610
1611 overlay_name = overlay_name_from_nr(overlay_nr + i);
1612
1613 if (!overlay_data_apply(overlay_name, &ovcs_id)) {
1614 unittest(0, "could not apply overlay \"%s\"\n",
1615 overlay_name);
1616 return;
1617 }
1618 ov_id[i] = ovcs_id;
1619 of_unittest_track_overlay(ov_id[i]);
1620 }
1621
1622 for (i = 0; i < 2; i++) {
1623 /* unittest device must be in after state */
1624 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1625 != after) {
1626 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1627 overlay_name_from_nr(overlay_nr + i),
1628 unittest_path(unittest_nr + i,
1629 PDEV_OVERLAY),
1630 !after ? "enabled" : "disabled");
1631 return;
1632 }
1633 }
1634
1635 for (i = 1; i >= 0; i--) {
1636 ovcs_id = ov_id[i];
1637 if (of_overlay_remove(&ovcs_id)) {
1638 unittest(0, "%s failed destroy @\"%s\"\n",
1639 overlay_name_from_nr(overlay_nr + i),
1640 unittest_path(unittest_nr + i,
1641 PDEV_OVERLAY));
1642 return;
1643 }
1644 of_unittest_untrack_overlay(ov_id[i]);
1645 }
1646
1647 for (i = 0; i < 2; i++) {
1648 /* unittest device must be again in before state */
1649 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1650 != before) {
1651 unittest(0, "%s with device @\"%s\" %s\n",
1652 overlay_name_from_nr(overlay_nr + i),
1653 unittest_path(unittest_nr + i,
1654 PDEV_OVERLAY),
1655 !before ? "enabled" : "disabled");
1656 return;
1657 }
1658 }
1659
1660 unittest(1, "overlay test %d passed\n", 6);
1661}
1662
1663/* test overlay application in sequence */
1664static void __init of_unittest_overlay_8(void)
1665{
1666 int i, ov_id[2], ovcs_id;
1667 int overlay_nr = 8, unittest_nr = 8;
1668 const char *overlay_name;
1669
1670 /* we don't care about device state in this test */
1671
1672 /* apply the overlays */
1673 for (i = 0; i < 2; i++) {
1674
1675 overlay_name = overlay_name_from_nr(overlay_nr + i);
1676
1677 if (!overlay_data_apply(overlay_name, &ovcs_id)) {
1678 unittest(0, "could not apply overlay \"%s\"\n",
1679 overlay_name);
1680 return;
1681 }
1682 ov_id[i] = ovcs_id;
1683 of_unittest_track_overlay(ov_id[i]);
1684 }
1685
1686 /* now try to remove first overlay (it should fail) */
1687 ovcs_id = ov_id[0];
1688 if (!of_overlay_remove(&ovcs_id)) {
1689 unittest(0, "%s was destroyed @\"%s\"\n",
1690 overlay_name_from_nr(overlay_nr + 0),
1691 unittest_path(unittest_nr,
1692 PDEV_OVERLAY));
1693 return;
1694 }
1695
1696 /* removing them in order should work */
1697 for (i = 1; i >= 0; i--) {
1698 ovcs_id = ov_id[i];
1699 if (of_overlay_remove(&ovcs_id)) {
1700 unittest(0, "%s not destroyed @\"%s\"\n",
1701 overlay_name_from_nr(overlay_nr + i),
1702 unittest_path(unittest_nr,
1703 PDEV_OVERLAY));
1704 return;
1705 }
1706 of_unittest_untrack_overlay(ov_id[i]);
1707 }
1708
1709 unittest(1, "overlay test %d passed\n", 8);
1710}
1711
1712/* test insertion of a bus with parent devices */
1713static void __init of_unittest_overlay_10(void)
1714{
1715 int ret;
1716 char *child_path;
1717
1718 /* device should disable */
1719 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1720 if (unittest(ret == 0,
1721 "overlay test %d failed; overlay application\n", 10))
1722 return;
1723
1724 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1725 unittest_path(10, PDEV_OVERLAY));
1726 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1727 return;
1728
1729 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1730 kfree(child_path);
1731
1732 unittest(ret, "overlay test %d failed; no child device\n", 10);
1733}
1734
1735/* test insertion of a bus with parent devices (and revert) */
1736static void __init of_unittest_overlay_11(void)
1737{
1738 int ret;
1739
1740 /* device should disable */
1741 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1742 PDEV_OVERLAY);
1743 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
1744}
1745
1746#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1747
1748struct unittest_i2c_bus_data {
1749 struct platform_device *pdev;
1750 struct i2c_adapter adap;
1751};
1752
1753static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1754 struct i2c_msg *msgs, int num)
1755{
1756 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1757
1758 (void)std;
1759
1760 return num;
1761}
1762
1763static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1764{
1765 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1766}
1767
1768static const struct i2c_algorithm unittest_i2c_algo = {
1769 .master_xfer = unittest_i2c_master_xfer,
1770 .functionality = unittest_i2c_functionality,
1771};
1772
1773static int unittest_i2c_bus_probe(struct platform_device *pdev)
1774{
1775 struct device *dev = &pdev->dev;
1776 struct device_node *np = dev->of_node;
1777 struct unittest_i2c_bus_data *std;
1778 struct i2c_adapter *adap;
1779 int ret;
1780
1781 if (np == NULL) {
1782 dev_err(dev, "No OF data for device\n");
1783 return -EINVAL;
1784
1785 }
1786
1787 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1788
1789 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1790 if (!std) {
1791 dev_err(dev, "Failed to allocate unittest i2c data\n");
1792 return -ENOMEM;
1793 }
1794
1795 /* link them together */
1796 std->pdev = pdev;
1797 platform_set_drvdata(pdev, std);
1798
1799 adap = &std->adap;
1800 i2c_set_adapdata(adap, std);
1801 adap->nr = -1;
1802 strlcpy(adap->name, pdev->name, sizeof(adap->name));
1803 adap->class = I2C_CLASS_DEPRECATED;
1804 adap->algo = &unittest_i2c_algo;
1805 adap->dev.parent = dev;
1806 adap->dev.of_node = dev->of_node;
1807 adap->timeout = 5 * HZ;
1808 adap->retries = 3;
1809
1810 ret = i2c_add_numbered_adapter(adap);
1811 if (ret != 0) {
1812 dev_err(dev, "Failed to add I2C adapter\n");
1813 return ret;
1814 }
1815
1816 return 0;
1817}
1818
1819static int unittest_i2c_bus_remove(struct platform_device *pdev)
1820{
1821 struct device *dev = &pdev->dev;
1822 struct device_node *np = dev->of_node;
1823 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1824
1825 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1826 i2c_del_adapter(&std->adap);
1827
1828 return 0;
1829}
1830
1831static const struct of_device_id unittest_i2c_bus_match[] = {
1832 { .compatible = "unittest-i2c-bus", },
1833 {},
1834};
1835
1836static struct platform_driver unittest_i2c_bus_driver = {
1837 .probe = unittest_i2c_bus_probe,
1838 .remove = unittest_i2c_bus_remove,
1839 .driver = {
1840 .name = "unittest-i2c-bus",
1841 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
1842 },
1843};
1844
1845static int unittest_i2c_dev_probe(struct i2c_client *client,
1846 const struct i2c_device_id *id)
1847{
1848 struct device *dev = &client->dev;
1849 struct device_node *np = client->dev.of_node;
1850
1851 if (!np) {
1852 dev_err(dev, "No OF node\n");
1853 return -EINVAL;
1854 }
1855
1856 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1857
1858 return 0;
1859};
1860
1861static int unittest_i2c_dev_remove(struct i2c_client *client)
1862{
1863 struct device *dev = &client->dev;
1864 struct device_node *np = client->dev.of_node;
1865
1866 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1867 return 0;
1868}
1869
1870static const struct i2c_device_id unittest_i2c_dev_id[] = {
1871 { .name = "unittest-i2c-dev" },
1872 { }
1873};
1874
1875static struct i2c_driver unittest_i2c_dev_driver = {
1876 .driver = {
1877 .name = "unittest-i2c-dev",
1878 },
1879 .probe = unittest_i2c_dev_probe,
1880 .remove = unittest_i2c_dev_remove,
1881 .id_table = unittest_i2c_dev_id,
1882};
1883
1884#if IS_BUILTIN(CONFIG_I2C_MUX)
1885
1886static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
1887{
1888 return 0;
1889}
1890
1891static int unittest_i2c_mux_probe(struct i2c_client *client,
1892 const struct i2c_device_id *id)
1893{
1894 int i, nchans;
1895 struct device *dev = &client->dev;
1896 struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1897 struct device_node *np = client->dev.of_node, *child;
1898 struct i2c_mux_core *muxc;
1899 u32 reg, max_reg;
1900
1901 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1902
1903 if (!np) {
1904 dev_err(dev, "No OF node\n");
1905 return -EINVAL;
1906 }
1907
1908 max_reg = (u32)-1;
1909 for_each_child_of_node(np, child) {
1910 if (of_property_read_u32(child, "reg", ®))
1911 continue;
1912 if (max_reg == (u32)-1 || reg > max_reg)
1913 max_reg = reg;
1914 }
1915 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1916 if (nchans == 0) {
1917 dev_err(dev, "No channels\n");
1918 return -EINVAL;
1919 }
1920
1921 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
1922 unittest_i2c_mux_select_chan, NULL);
1923 if (!muxc)
1924 return -ENOMEM;
1925 for (i = 0; i < nchans; i++) {
1926 if (i2c_mux_add_adapter(muxc, 0, i, 0)) {
1927 dev_err(dev, "Failed to register mux #%d\n", i);
1928 i2c_mux_del_adapters(muxc);
1929 return -ENODEV;
1930 }
1931 }
1932
1933 i2c_set_clientdata(client, muxc);
1934
1935 return 0;
1936};
1937
1938static int unittest_i2c_mux_remove(struct i2c_client *client)
1939{
1940 struct device *dev = &client->dev;
1941 struct device_node *np = client->dev.of_node;
1942 struct i2c_mux_core *muxc = i2c_get_clientdata(client);
1943
1944 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1945 i2c_mux_del_adapters(muxc);
1946 return 0;
1947}
1948
1949static const struct i2c_device_id unittest_i2c_mux_id[] = {
1950 { .name = "unittest-i2c-mux" },
1951 { }
1952};
1953
1954static struct i2c_driver unittest_i2c_mux_driver = {
1955 .driver = {
1956 .name = "unittest-i2c-mux",
1957 },
1958 .probe = unittest_i2c_mux_probe,
1959 .remove = unittest_i2c_mux_remove,
1960 .id_table = unittest_i2c_mux_id,
1961};
1962
1963#endif
1964
1965static int of_unittest_overlay_i2c_init(void)
1966{
1967 int ret;
1968
1969 ret = i2c_add_driver(&unittest_i2c_dev_driver);
1970 if (unittest(ret == 0,
1971 "could not register unittest i2c device driver\n"))
1972 return ret;
1973
1974 ret = platform_driver_register(&unittest_i2c_bus_driver);
1975 if (unittest(ret == 0,
1976 "could not register unittest i2c bus driver\n"))
1977 return ret;
1978
1979#if IS_BUILTIN(CONFIG_I2C_MUX)
1980 ret = i2c_add_driver(&unittest_i2c_mux_driver);
1981 if (unittest(ret == 0,
1982 "could not register unittest i2c mux driver\n"))
1983 return ret;
1984#endif
1985
1986 return 0;
1987}
1988
1989static void of_unittest_overlay_i2c_cleanup(void)
1990{
1991#if IS_BUILTIN(CONFIG_I2C_MUX)
1992 i2c_del_driver(&unittest_i2c_mux_driver);
1993#endif
1994 platform_driver_unregister(&unittest_i2c_bus_driver);
1995 i2c_del_driver(&unittest_i2c_dev_driver);
1996}
1997
1998static void __init of_unittest_overlay_i2c_12(void)
1999{
2000 /* device should enable */
2001 if (of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY))
2002 return;
2003
2004 unittest(1, "overlay test %d passed\n", 12);
2005}
2006
2007/* test deactivation of device */
2008static void __init of_unittest_overlay_i2c_13(void)
2009{
2010 /* device should disable */
2011 if (of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY))
2012 return;
2013
2014 unittest(1, "overlay test %d passed\n", 13);
2015}
2016
2017/* just check for i2c mux existence */
2018static void of_unittest_overlay_i2c_14(void)
2019{
2020}
2021
2022static void __init of_unittest_overlay_i2c_15(void)
2023{
2024 /* device should enable */
2025 if (of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY))
2026 return;
2027
2028 unittest(1, "overlay test %d passed\n", 15);
2029}
2030
2031#else
2032
2033static inline void of_unittest_overlay_i2c_14(void) { }
2034static inline void of_unittest_overlay_i2c_15(void) { }
2035
2036#endif
2037
2038static void __init of_unittest_overlay(void)
2039{
2040 struct device_node *bus_np = NULL;
2041
2042 if (platform_driver_register(&unittest_driver)) {
2043 unittest(0, "could not register unittest driver\n");
2044 goto out;
2045 }
2046
2047 bus_np = of_find_node_by_path(bus_path);
2048 if (bus_np == NULL) {
2049 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
2050 goto out;
2051 }
2052
2053 if (of_platform_default_populate(bus_np, NULL, NULL)) {
2054 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
2055 goto out;
2056 }
2057
2058 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
2059 unittest(0, "could not find unittest0 @ \"%s\"\n",
2060 unittest_path(100, PDEV_OVERLAY));
2061 goto out;
2062 }
2063
2064 if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
2065 unittest(0, "unittest1 @ \"%s\" should not exist\n",
2066 unittest_path(101, PDEV_OVERLAY));
2067 goto out;
2068 }
2069
2070 unittest(1, "basic infrastructure of overlays passed");
2071
2072 /* tests in sequence */
2073 of_unittest_overlay_0();
2074 of_unittest_overlay_1();
2075 of_unittest_overlay_2();
2076 of_unittest_overlay_3();
2077 of_unittest_overlay_4();
2078 of_unittest_overlay_5();
2079 of_unittest_overlay_6();
2080 of_unittest_overlay_8();
2081
2082 of_unittest_overlay_10();
2083 of_unittest_overlay_11();
2084
2085#if IS_BUILTIN(CONFIG_I2C)
2086 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
2087 goto out;
2088
2089 of_unittest_overlay_i2c_12();
2090 of_unittest_overlay_i2c_13();
2091 of_unittest_overlay_i2c_14();
2092 of_unittest_overlay_i2c_15();
2093
2094 of_unittest_overlay_i2c_cleanup();
2095#endif
2096
2097 of_unittest_destroy_tracked_overlays();
2098
2099out:
2100 of_node_put(bus_np);
2101}
2102
2103#else
2104static inline void __init of_unittest_overlay(void) { }
2105#endif
2106
2107#ifdef CONFIG_OF_OVERLAY
2108
2109/*
2110 * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb
2111 * in scripts/Makefile.lib
2112 */
2113
2114#define OVERLAY_INFO_EXTERN(name) \
2115 extern uint8_t __dtb_##name##_begin[]; \
2116 extern uint8_t __dtb_##name##_end[]
2117
2118#define OVERLAY_INFO(overlay_name, expected) \
2119{ .dtb_begin = __dtb_##overlay_name##_begin, \
2120 .dtb_end = __dtb_##overlay_name##_end, \
2121 .expected_result = expected, \
2122 .name = #overlay_name, \
2123}
2124
2125struct overlay_info {
2126 uint8_t *dtb_begin;
2127 uint8_t *dtb_end;
2128 int expected_result;
2129 int overlay_id;
2130 char *name;
2131};
2132
2133OVERLAY_INFO_EXTERN(overlay_base);
2134OVERLAY_INFO_EXTERN(overlay);
2135OVERLAY_INFO_EXTERN(overlay_0);
2136OVERLAY_INFO_EXTERN(overlay_1);
2137OVERLAY_INFO_EXTERN(overlay_2);
2138OVERLAY_INFO_EXTERN(overlay_3);
2139OVERLAY_INFO_EXTERN(overlay_4);
2140OVERLAY_INFO_EXTERN(overlay_5);
2141OVERLAY_INFO_EXTERN(overlay_6);
2142OVERLAY_INFO_EXTERN(overlay_7);
2143OVERLAY_INFO_EXTERN(overlay_8);
2144OVERLAY_INFO_EXTERN(overlay_9);
2145OVERLAY_INFO_EXTERN(overlay_10);
2146OVERLAY_INFO_EXTERN(overlay_11);
2147OVERLAY_INFO_EXTERN(overlay_12);
2148OVERLAY_INFO_EXTERN(overlay_13);
2149OVERLAY_INFO_EXTERN(overlay_15);
2150OVERLAY_INFO_EXTERN(overlay_bad_phandle);
2151OVERLAY_INFO_EXTERN(overlay_bad_symbol);
2152
2153/* order of entries is hard-coded into users of overlays[] */
2154static struct overlay_info overlays[] = {
2155 OVERLAY_INFO(overlay_base, -9999),
2156 OVERLAY_INFO(overlay, 0),
2157 OVERLAY_INFO(overlay_0, 0),
2158 OVERLAY_INFO(overlay_1, 0),
2159 OVERLAY_INFO(overlay_2, 0),
2160 OVERLAY_INFO(overlay_3, 0),
2161 OVERLAY_INFO(overlay_4, 0),
2162 OVERLAY_INFO(overlay_5, 0),
2163 OVERLAY_INFO(overlay_6, 0),
2164 OVERLAY_INFO(overlay_7, 0),
2165 OVERLAY_INFO(overlay_8, 0),
2166 OVERLAY_INFO(overlay_9, 0),
2167 OVERLAY_INFO(overlay_10, 0),
2168 OVERLAY_INFO(overlay_11, 0),
2169 OVERLAY_INFO(overlay_12, 0),
2170 OVERLAY_INFO(overlay_13, 0),
2171 OVERLAY_INFO(overlay_15, 0),
2172 OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
2173 OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
2174 {}
2175};
2176
2177static struct device_node *overlay_base_root;
2178
2179static void * __init dt_alloc_memory(u64 size, u64 align)
2180{
2181 return memblock_virt_alloc(size, align);
2182}
2183
2184/*
2185 * Create base device tree for the overlay unittest.
2186 *
2187 * This is called from very early boot code.
2188 *
2189 * Do as much as possible the same way as done in __unflatten_device_tree
2190 * and other early boot steps for the normal FDT so that the overlay base
2191 * unflattened tree will have the same characteristics as the real tree
2192 * (such as having memory allocated by the early allocator). The goal
2193 * is to test "the real thing" as much as possible, and test "test setup
2194 * code" as little as possible.
2195 *
2196 * Have to stop before resolving phandles, because that uses kmalloc.
2197 */
2198void __init unittest_unflatten_overlay_base(void)
2199{
2200 struct overlay_info *info;
2201 u32 data_size;
2202 void *new_fdt;
2203 u32 size;
2204
2205 info = &overlays[0];
2206
2207 if (info->expected_result != -9999) {
2208 pr_err("No dtb 'overlay_base' to attach\n");
2209 return;
2210 }
2211
2212 data_size = info->dtb_end - info->dtb_begin;
2213 if (!data_size) {
2214 pr_err("No dtb 'overlay_base' to attach\n");
2215 return;
2216 }
2217
2218 size = fdt_totalsize(info->dtb_begin);
2219 if (size != data_size) {
2220 pr_err("dtb 'overlay_base' header totalsize != actual size");
2221 return;
2222 }
2223
2224 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
2225 if (!new_fdt) {
2226 pr_err("alloc for dtb 'overlay_base' failed");
2227 return;
2228 }
2229
2230 memcpy(new_fdt, info->dtb_begin, size);
2231
2232 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
2233 dt_alloc_memory, true);
2234}
2235
2236/*
2237 * The purpose of of_unittest_overlay_data_add is to add an
2238 * overlay in the normal fashion. This is a test of the whole
2239 * picture, instead of testing individual elements.
2240 *
2241 * A secondary purpose is to be able to verify that the contents of
2242 * /proc/device-tree/ contains the updated structure and values from
2243 * the overlay. That must be verified separately in user space.
2244 *
2245 * Return 0 on unexpected error.
2246 */
2247static int __init overlay_data_apply(const char *overlay_name, int *overlay_id)
2248{
2249 struct overlay_info *info;
2250 int found = 0;
2251 int k;
2252 int ret;
2253 u32 size;
2254
2255 for (k = 0, info = overlays; info && info->name; info++, k++) {
2256 if (!strcmp(overlay_name, info->name)) {
2257 found = 1;
2258 break;
2259 }
2260 }
2261 if (!found) {
2262 pr_err("no overlay data for %s\n", overlay_name);
2263 return 0;
2264 }
2265
2266 size = info->dtb_end - info->dtb_begin;
2267 if (!size)
2268 pr_err("no overlay data for %s\n", overlay_name);
2269
2270 ret = of_overlay_fdt_apply(info->dtb_begin, size, &info->overlay_id);
2271 if (overlay_id)
2272 *overlay_id = info->overlay_id;
2273 if (ret < 0)
2274 goto out;
2275
2276 pr_debug("%s applied\n", overlay_name);
2277
2278out:
2279 if (ret != info->expected_result)
2280 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
2281 info->expected_result, ret, overlay_name);
2282
2283 return (ret == info->expected_result);
2284}
2285
2286/*
2287 * The purpose of of_unittest_overlay_high_level is to add an overlay
2288 * in the normal fashion. This is a test of the whole picture,
2289 * instead of individual elements.
2290 *
2291 * The first part of the function is _not_ normal overlay usage; it is
2292 * finishing splicing the base overlay device tree into the live tree.
2293 */
2294static __init void of_unittest_overlay_high_level(void)
2295{
2296 struct device_node *last_sibling;
2297 struct device_node *np;
2298 struct device_node *of_symbols;
2299 struct device_node *overlay_base_symbols;
2300 struct device_node **pprev;
2301 struct property *prop;
2302
2303 if (!overlay_base_root) {
2304 unittest(0, "overlay_base_root not initialized\n");
2305 return;
2306 }
2307
2308 /*
2309 * Could not fixup phandles in unittest_unflatten_overlay_base()
2310 * because kmalloc() was not yet available.
2311 */
2312 of_overlay_mutex_lock();
2313 of_resolve_phandles(overlay_base_root);
2314 of_overlay_mutex_unlock();
2315
2316
2317 /*
2318 * do not allow overlay_base to duplicate any node already in
2319 * tree, this greatly simplifies the code
2320 */
2321
2322 /*
2323 * remove overlay_base_root node "__local_fixups", after
2324 * being used by of_resolve_phandles()
2325 */
2326 pprev = &overlay_base_root->child;
2327 for (np = overlay_base_root->child; np; np = np->sibling) {
2328 if (!of_node_cmp(np->name, "__local_fixups__")) {
2329 *pprev = np->sibling;
2330 break;
2331 }
2332 pprev = &np->sibling;
2333 }
2334
2335 /* remove overlay_base_root node "__symbols__" if in live tree */
2336 of_symbols = of_get_child_by_name(of_root, "__symbols__");
2337 if (of_symbols) {
2338 /* will have to graft properties from node into live tree */
2339 pprev = &overlay_base_root->child;
2340 for (np = overlay_base_root->child; np; np = np->sibling) {
2341 if (!of_node_cmp(np->name, "__symbols__")) {
2342 overlay_base_symbols = np;
2343 *pprev = np->sibling;
2344 break;
2345 }
2346 pprev = &np->sibling;
2347 }
2348 }
2349
2350 for (np = overlay_base_root->child; np; np = np->sibling) {
2351 if (of_get_child_by_name(of_root, np->name)) {
2352 unittest(0, "illegal node name in overlay_base %s",
2353 np->name);
2354 return;
2355 }
2356 }
2357
2358 /*
2359 * overlay 'overlay_base' is not allowed to have root
2360 * properties, so only need to splice nodes into main device tree.
2361 *
2362 * root node of *overlay_base_root will not be freed, it is lost
2363 * memory.
2364 */
2365
2366 for (np = overlay_base_root->child; np; np = np->sibling)
2367 np->parent = of_root;
2368
2369 mutex_lock(&of_mutex);
2370
2371 for (last_sibling = np = of_root->child; np; np = np->sibling)
2372 last_sibling = np;
2373
2374 if (last_sibling)
2375 last_sibling->sibling = overlay_base_root->child;
2376 else
2377 of_root->child = overlay_base_root->child;
2378
2379 for_each_of_allnodes_from(overlay_base_root, np)
2380 __of_attach_node_sysfs(np);
2381
2382 if (of_symbols) {
2383 struct property *new_prop;
2384 for_each_property_of_node(overlay_base_symbols, prop) {
2385
2386 new_prop = __of_prop_dup(prop, GFP_KERNEL);
2387 if (!new_prop) {
2388 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
2389 prop->name);
2390 goto err_unlock;
2391 }
2392 if (__of_add_property(of_symbols, new_prop)) {
2393 /* "name" auto-generated by unflatten */
2394 if (!strcmp(new_prop->name, "name"))
2395 continue;
2396 unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
2397 prop->name);
2398 goto err_unlock;
2399 }
2400 if (__of_add_property_sysfs(of_symbols, new_prop)) {
2401 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
2402 prop->name);
2403 goto err_unlock;
2404 }
2405 }
2406 }
2407
2408 mutex_unlock(&of_mutex);
2409
2410
2411 /* now do the normal overlay usage test */
2412
2413 unittest(overlay_data_apply("overlay", NULL),
2414 "Adding overlay 'overlay' failed\n");
2415
2416 unittest(overlay_data_apply("overlay_bad_phandle", NULL),
2417 "Adding overlay 'overlay_bad_phandle' failed\n");
2418
2419 unittest(overlay_data_apply("overlay_bad_symbol", NULL),
2420 "Adding overlay 'overlay_bad_symbol' failed\n");
2421
2422 return;
2423
2424err_unlock:
2425 mutex_unlock(&of_mutex);
2426}
2427
2428#else
2429
2430static inline __init void of_unittest_overlay_high_level(void) {}
2431
2432#endif
2433
2434static int __init of_unittest(void)
2435{
2436 struct device_node *np;
2437 int res;
2438
2439 /* adding data for unittest */
2440 res = unittest_data_add();
2441 if (res)
2442 return res;
2443 if (!of_aliases)
2444 of_aliases = of_find_node_by_path("/aliases");
2445
2446 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
2447 if (!np) {
2448 pr_info("No testcase data in device tree; not running tests\n");
2449 return 0;
2450 }
2451 of_node_put(np);
2452
2453 pr_info("start of unittest - you will see error messages\n");
2454 of_unittest_check_tree_linkage();
2455 of_unittest_check_phandles();
2456 of_unittest_find_node_by_name();
2457 of_unittest_dynamic();
2458 of_unittest_parse_phandle_with_args();
2459 of_unittest_parse_phandle_with_args_map();
2460 of_unittest_printf();
2461 of_unittest_property_string();
2462 of_unittest_property_copy();
2463 of_unittest_changeset();
2464 of_unittest_parse_interrupts();
2465 of_unittest_parse_interrupts_extended();
2466 of_unittest_match_node();
2467 of_unittest_platform_populate();
2468 of_unittest_overlay();
2469
2470 /* Double check linkage after removing testcase data */
2471 of_unittest_check_tree_linkage();
2472
2473 of_unittest_overlay_high_level();
2474
2475 pr_info("end of unittest - %i passed, %i failed\n",
2476 unittest_results.passed, unittest_results.failed);
2477
2478 return 0;
2479}
2480late_initcall(of_unittest);