Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/of/selftest.c

  1 /*
  2  * Self tests for device tree subsystem
  3  */
  4 
  5 #define pr_fmt(fmt) "### dt-test ### " fmt
  6 
  7 #include <linux/clk.h>
  8 #include <linux/err.h>
  9 #include <linux/errno.h>
 10 #include <linux/module.h>
 11 #include <linux/of.h>
 12 #include <linux/of_irq.h>
 13 #include <linux/of_platform.h>
 14 #include <linux/list.h>
 15 #include <linux/mutex.h>
 16 #include <linux/slab.h>
 17 #include <linux/device.h>
 18 
 19 static struct selftest_results {
 20         int passed;
 21         int failed;
 22 } selftest_results;
 23 
 24 #define selftest(result, fmt, ...) { \
 25         if (!(result)) { \
 26                 selftest_results.failed++; \
 27                 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
 28         } else { \
 29                 selftest_results.passed++; \
 30                 pr_debug("pass %s():%i\n", __func__, __LINE__); \
 31         } \
 32 }
 33 
 34 static void __init of_selftest_dynamic(void)
 35 {
 36         struct device_node *np;
 37         struct property *prop;
 38 
 39         np = of_find_node_by_path("/testcase-data");
 40         if (!np) {
 41                 pr_err("missing testcase data\n");
 42                 return;
 43         }
 44 
 45         /* Array of 4 properties for the purpose of testing */
 46         prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
 47         if (!prop) {
 48                 selftest(0, "kzalloc() failed\n");
 49                 return;
 50         }
 51 
 52         /* Add a new property - should pass*/
 53         prop->name = "new-property";
 54         prop->value = "new-property-data";
 55         prop->length = strlen(prop->value);
 56         selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
 57 
 58         /* Try to add an existing property - should fail */
 59         prop++;
 60         prop->name = "new-property";
 61         prop->value = "new-property-data-should-fail";
 62         prop->length = strlen(prop->value);
 63         selftest(of_add_property(np, prop) != 0,
 64                  "Adding an existing property should have failed\n");
 65 
 66         /* Try to modify an existing property - should pass */
 67         prop->value = "modify-property-data-should-pass";
 68         prop->length = strlen(prop->value);
 69         selftest(of_update_property(np, prop) == 0,
 70                  "Updating an existing property should have passed\n");
 71 
 72         /* Try to modify non-existent property - should pass*/
 73         prop++;
 74         prop->name = "modify-property";
 75         prop->value = "modify-missing-property-data-should-pass";
 76         prop->length = strlen(prop->value);
 77         selftest(of_update_property(np, prop) == 0,
 78                  "Updating a missing property should have passed\n");
 79 
 80         /* Remove property - should pass */
 81         selftest(of_remove_property(np, prop) == 0,
 82                  "Removing a property should have passed\n");
 83 
 84         /* Adding very large property - should pass */
 85         prop++;
 86         prop->name = "large-property-PAGE_SIZEx8";
 87         prop->length = PAGE_SIZE * 8;
 88         prop->value = kzalloc(prop->length, GFP_KERNEL);
 89         selftest(prop->value != NULL, "Unable to allocate large buffer\n");
 90         if (prop->value)
 91                 selftest(of_add_property(np, prop) == 0,
 92                          "Adding a large property should have passed\n");
 93 }
 94 
 95 static void __init of_selftest_parse_phandle_with_args(void)
 96 {
 97         struct device_node *np;
 98         struct of_phandle_args args;
 99         int i, rc;
100 
101         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
102         if (!np) {
103                 pr_err("missing testcase data\n");
104                 return;
105         }
106 
107         rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
108         selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
109 
110         for (i = 0; i < 8; i++) {
111                 bool passed = true;
112                 rc = of_parse_phandle_with_args(np, "phandle-list",
113                                                 "#phandle-cells", i, &args);
114 
115                 /* Test the values from tests-phandle.dtsi */
116                 switch (i) {
117                 case 0:
118                         passed &= !rc;
119                         passed &= (args.args_count == 1);
120                         passed &= (args.args[0] == (i + 1));
121                         break;
122                 case 1:
123                         passed &= !rc;
124                         passed &= (args.args_count == 2);
125                         passed &= (args.args[0] == (i + 1));
126                         passed &= (args.args[1] == 0);
127                         break;
128                 case 2:
129                         passed &= (rc == -ENOENT);
130                         break;
131                 case 3:
132                         passed &= !rc;
133                         passed &= (args.args_count == 3);
134                         passed &= (args.args[0] == (i + 1));
135                         passed &= (args.args[1] == 4);
136                         passed &= (args.args[2] == 3);
137                         break;
138                 case 4:
139                         passed &= !rc;
140                         passed &= (args.args_count == 2);
141                         passed &= (args.args[0] == (i + 1));
142                         passed &= (args.args[1] == 100);
143                         break;
144                 case 5:
145                         passed &= !rc;
146                         passed &= (args.args_count == 0);
147                         break;
148                 case 6:
149                         passed &= !rc;
150                         passed &= (args.args_count == 1);
151                         passed &= (args.args[0] == (i + 1));
152                         break;
153                 case 7:
154                         passed &= (rc == -ENOENT);
155                         break;
156                 default:
157                         passed = false;
158                 }
159 
160                 selftest(passed, "index %i - data error on node %s rc=%i\n",
161                          i, args.np->full_name, rc);
162         }
163 
164         /* Check for missing list property */
165         rc = of_parse_phandle_with_args(np, "phandle-list-missing",
166                                         "#phandle-cells", 0, &args);
167         selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
168         rc = of_count_phandle_with_args(np, "phandle-list-missing",
169                                         "#phandle-cells");
170         selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
171 
172         /* Check for missing cells property */
173         rc = of_parse_phandle_with_args(np, "phandle-list",
174                                         "#phandle-cells-missing", 0, &args);
175         selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
176         rc = of_count_phandle_with_args(np, "phandle-list",
177                                         "#phandle-cells-missing");
178         selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
179 
180         /* Check for bad phandle in list */
181         rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
182                                         "#phandle-cells", 0, &args);
183         selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
184         rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
185                                         "#phandle-cells");
186         selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
187 
188         /* Check for incorrectly formed argument list */
189         rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
190                                         "#phandle-cells", 1, &args);
191         selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
192         rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
193                                         "#phandle-cells");
194         selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
195 }
196 
197 static void __init of_selftest_property_match_string(void)
198 {
199         struct device_node *np;
200         int rc;
201 
202         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
203         if (!np) {
204                 pr_err("No testcase data in device tree\n");
205                 return;
206         }
207 
208         rc = of_property_match_string(np, "phandle-list-names", "first");
209         selftest(rc == 0, "first expected:0 got:%i\n", rc);
210         rc = of_property_match_string(np, "phandle-list-names", "second");
211         selftest(rc == 1, "second expected:0 got:%i\n", rc);
212         rc = of_property_match_string(np, "phandle-list-names", "third");
213         selftest(rc == 2, "third expected:0 got:%i\n", rc);
214         rc = of_property_match_string(np, "phandle-list-names", "fourth");
215         selftest(rc == -ENODATA, "unmatched string; rc=%i", rc);
216         rc = of_property_match_string(np, "missing-property", "blah");
217         selftest(rc == -EINVAL, "missing property; rc=%i", rc);
218         rc = of_property_match_string(np, "empty-property", "blah");
219         selftest(rc == -ENODATA, "empty property; rc=%i", rc);
220         rc = of_property_match_string(np, "unterminated-string", "blah");
221         selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc);
222 }
223 
224 static void __init of_selftest_parse_interrupts(void)
225 {
226         struct device_node *np;
227         struct of_phandle_args args;
228         int i, rc;
229 
230         np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
231         if (!np) {
232                 pr_err("missing testcase data\n");
233                 return;
234         }
235 
236         for (i = 0; i < 4; i++) {
237                 bool passed = true;
238                 args.args_count = 0;
239                 rc = of_irq_parse_one(np, i, &args);
240 
241                 passed &= !rc;
242                 passed &= (args.args_count == 1);
243                 passed &= (args.args[0] == (i + 1));
244 
245                 selftest(passed, "index %i - data error on node %s rc=%i\n",
246                          i, args.np->full_name, rc);
247         }
248         of_node_put(np);
249 
250         np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
251         if (!np) {
252                 pr_err("missing testcase data\n");
253                 return;
254         }
255 
256         for (i = 0; i < 4; i++) {
257                 bool passed = true;
258                 args.args_count = 0;
259                 rc = of_irq_parse_one(np, i, &args);
260 
261                 /* Test the values from tests-phandle.dtsi */
262                 switch (i) {
263                 case 0:
264                         passed &= !rc;
265                         passed &= (args.args_count == 1);
266                         passed &= (args.args[0] == 9);
267                         break;
268                 case 1:
269                         passed &= !rc;
270                         passed &= (args.args_count == 3);
271                         passed &= (args.args[0] == 10);
272                         passed &= (args.args[1] == 11);
273                         passed &= (args.args[2] == 12);
274                         break;
275                 case 2:
276                         passed &= !rc;
277                         passed &= (args.args_count == 2);
278                         passed &= (args.args[0] == 13);
279                         passed &= (args.args[1] == 14);
280                         break;
281                 case 3:
282                         passed &= !rc;
283                         passed &= (args.args_count == 2);
284                         passed &= (args.args[0] == 15);
285                         passed &= (args.args[1] == 16);
286                         break;
287                 default:
288                         passed = false;
289                 }
290                 selftest(passed, "index %i - data error on node %s rc=%i\n",
291                          i, args.np->full_name, rc);
292         }
293         of_node_put(np);
294 }
295 
296 static void __init of_selftest_parse_interrupts_extended(void)
297 {
298         struct device_node *np;
299         struct of_phandle_args args;
300         int i, rc;
301 
302         np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
303         if (!np) {
304                 pr_err("missing testcase data\n");
305                 return;
306         }
307 
308         for (i = 0; i < 7; i++) {
309                 bool passed = true;
310                 rc = of_irq_parse_one(np, i, &args);
311 
312                 /* Test the values from tests-phandle.dtsi */
313                 switch (i) {
314                 case 0:
315                         passed &= !rc;
316                         passed &= (args.args_count == 1);
317                         passed &= (args.args[0] == 1);
318                         break;
319                 case 1:
320                         passed &= !rc;
321                         passed &= (args.args_count == 3);
322                         passed &= (args.args[0] == 2);
323                         passed &= (args.args[1] == 3);
324                         passed &= (args.args[2] == 4);
325                         break;
326                 case 2:
327                         passed &= !rc;
328                         passed &= (args.args_count == 2);
329                         passed &= (args.args[0] == 5);
330                         passed &= (args.args[1] == 6);
331                         break;
332                 case 3:
333                         passed &= !rc;
334                         passed &= (args.args_count == 1);
335                         passed &= (args.args[0] == 9);
336                         break;
337                 case 4:
338                         passed &= !rc;
339                         passed &= (args.args_count == 3);
340                         passed &= (args.args[0] == 10);
341                         passed &= (args.args[1] == 11);
342                         passed &= (args.args[2] == 12);
343                         break;
344                 case 5:
345                         passed &= !rc;
346                         passed &= (args.args_count == 2);
347                         passed &= (args.args[0] == 13);
348                         passed &= (args.args[1] == 14);
349                         break;
350                 case 6:
351                         passed &= !rc;
352                         passed &= (args.args_count == 1);
353                         passed &= (args.args[0] == 15);
354                         break;
355                 default:
356                         passed = false;
357                 }
358 
359                 selftest(passed, "index %i - data error on node %s rc=%i\n",
360                          i, args.np->full_name, rc);
361         }
362         of_node_put(np);
363 }
364 
365 static struct of_device_id match_node_table[] = {
366         { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
367         { .data = "B", .type = "type1", }, /* followed by type alone */
368 
369         { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
370         { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
371         { .data = "Cc", .name = "name2", .type = "type2", },
372 
373         { .data = "E", .compatible = "compat3" },
374         { .data = "G", .compatible = "compat2", },
375         { .data = "H", .compatible = "compat2", .name = "name5", },
376         { .data = "I", .compatible = "compat2", .type = "type1", },
377         { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
378         { .data = "K", .compatible = "compat2", .name = "name9", },
379         {}
380 };
381 
382 static struct {
383         const char *path;
384         const char *data;
385 } match_node_tests[] = {
386         { .path = "/testcase-data/match-node/name0", .data = "A", },
387         { .path = "/testcase-data/match-node/name1", .data = "B", },
388         { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
389         { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
390         { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
391         { .path = "/testcase-data/match-node/name3", .data = "E", },
392         { .path = "/testcase-data/match-node/name4", .data = "G", },
393         { .path = "/testcase-data/match-node/name5", .data = "H", },
394         { .path = "/testcase-data/match-node/name6", .data = "G", },
395         { .path = "/testcase-data/match-node/name7", .data = "I", },
396         { .path = "/testcase-data/match-node/name8", .data = "J", },
397         { .path = "/testcase-data/match-node/name9", .data = "K", },
398 };
399 
400 static void __init of_selftest_match_node(void)
401 {
402         struct device_node *np;
403         const struct of_device_id *match;
404         int i;
405 
406         for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
407                 np = of_find_node_by_path(match_node_tests[i].path);
408                 if (!np) {
409                         selftest(0, "missing testcase node %s\n",
410                                 match_node_tests[i].path);
411                         continue;
412                 }
413 
414                 match = of_match_node(match_node_table, np);
415                 if (!match) {
416                         selftest(0, "%s didn't match anything\n",
417                                 match_node_tests[i].path);
418                         continue;
419                 }
420 
421                 if (strcmp(match->data, match_node_tests[i].data) != 0) {
422                         selftest(0, "%s got wrong match. expected %s, got %s\n",
423                                 match_node_tests[i].path, match_node_tests[i].data,
424                                 (const char *)match->data);
425                         continue;
426                 }
427                 selftest(1, "passed");
428         }
429 }
430 
431 static void __init of_selftest_platform_populate(void)
432 {
433         int irq;
434         struct device_node *np;
435         struct platform_device *pdev;
436 
437         np = of_find_node_by_path("/testcase-data");
438         of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
439 
440         /* Test that a missing irq domain returns -EPROBE_DEFER */
441         np = of_find_node_by_path("/testcase-data/testcase-device1");
442         pdev = of_find_device_by_node(np);
443         if (!pdev)
444                 selftest(0, "device 1 creation failed\n");
445         irq = platform_get_irq(pdev, 0);
446         if (irq != -EPROBE_DEFER)
447                 selftest(0, "device deferred probe failed - %d\n", irq);
448 
449         /* Test that a parsing failure does not return -EPROBE_DEFER */
450         np = of_find_node_by_path("/testcase-data/testcase-device2");
451         pdev = of_find_device_by_node(np);
452         if (!pdev)
453                 selftest(0, "device 2 creation failed\n");
454         irq = platform_get_irq(pdev, 0);
455         if (irq >= 0 || irq == -EPROBE_DEFER)
456                 selftest(0, "device parsing error failed - %d\n", irq);
457 
458         selftest(1, "passed");
459 }
460 
461 static int __init of_selftest(void)
462 {
463         struct device_node *np;
464 
465         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
466         if (!np) {
467                 pr_info("No testcase data in device tree; not running tests\n");
468                 return 0;
469         }
470         of_node_put(np);
471 
472         pr_info("start of selftest - you will see error messages\n");
473         of_selftest_dynamic();
474         of_selftest_parse_phandle_with_args();
475         of_selftest_property_match_string();
476         of_selftest_parse_interrupts();
477         of_selftest_parse_interrupts_extended();
478         of_selftest_match_node();
479         of_selftest_platform_populate();
480         pr_info("end of selftest - %i passed, %i failed\n",
481                 selftest_results.passed, selftest_results.failed);
482         return 0;
483 }
484 late_initcall(of_selftest);
485 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us