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1/*
2 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2007.
3 *
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of the
8 * License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20
21#include "dtc.h"
22
23#ifdef TRACE_CHECKS
24#define TRACE(c, ...) \
25 do { \
26 fprintf(stderr, "=== %s: ", (c)->name); \
27 fprintf(stderr, __VA_ARGS__); \
28 fprintf(stderr, "\n"); \
29 } while (0)
30#else
31#define TRACE(c, fmt, ...) do { } while (0)
32#endif
33
34enum checkstatus {
35 UNCHECKED = 0,
36 PREREQ,
37 PASSED,
38 FAILED,
39};
40
41struct check;
42
43typedef void (*check_fn)(struct check *c, struct dt_info *dti, struct node *node);
44
45struct check {
46 const char *name;
47 check_fn fn;
48 void *data;
49 bool warn, error;
50 enum checkstatus status;
51 bool inprogress;
52 int num_prereqs;
53 struct check **prereq;
54};
55
56#define CHECK_ENTRY(nm_, fn_, d_, w_, e_, ...) \
57 static struct check *nm_##_prereqs[] = { __VA_ARGS__ }; \
58 static struct check nm_ = { \
59 .name = #nm_, \
60 .fn = (fn_), \
61 .data = (d_), \
62 .warn = (w_), \
63 .error = (e_), \
64 .status = UNCHECKED, \
65 .num_prereqs = ARRAY_SIZE(nm_##_prereqs), \
66 .prereq = nm_##_prereqs, \
67 };
68#define WARNING(nm_, fn_, d_, ...) \
69 CHECK_ENTRY(nm_, fn_, d_, true, false, __VA_ARGS__)
70#define ERROR(nm_, fn_, d_, ...) \
71 CHECK_ENTRY(nm_, fn_, d_, false, true, __VA_ARGS__)
72#define CHECK(nm_, fn_, d_, ...) \
73 CHECK_ENTRY(nm_, fn_, d_, false, false, __VA_ARGS__)
74
75static inline void PRINTF(5, 6) check_msg(struct check *c, struct dt_info *dti,
76 struct node *node,
77 struct property *prop,
78 const char *fmt, ...)
79{
80 va_list ap;
81 va_start(ap, fmt);
82
83 if ((c->warn && (quiet < 1))
84 || (c->error && (quiet < 2))) {
85 fprintf(stderr, "%s: %s (%s): ",
86 strcmp(dti->outname, "-") ? dti->outname : "<stdout>",
87 (c->error) ? "ERROR" : "Warning", c->name);
88 if (node) {
89 fprintf(stderr, "%s", node->fullpath);
90 if (prop)
91 fprintf(stderr, ":%s", prop->name);
92 fputs(": ", stderr);
93 }
94 vfprintf(stderr, fmt, ap);
95 fprintf(stderr, "\n");
96 }
97 va_end(ap);
98}
99
100#define FAIL(c, dti, node, ...) \
101 do { \
102 TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
103 (c)->status = FAILED; \
104 check_msg((c), dti, node, NULL, __VA_ARGS__); \
105 } while (0)
106
107#define FAIL_PROP(c, dti, node, prop, ...) \
108 do { \
109 TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
110 (c)->status = FAILED; \
111 check_msg((c), dti, node, prop, __VA_ARGS__); \
112 } while (0)
113
114
115static void check_nodes_props(struct check *c, struct dt_info *dti, struct node *node)
116{
117 struct node *child;
118
119 TRACE(c, "%s", node->fullpath);
120 if (c->fn)
121 c->fn(c, dti, node);
122
123 for_each_child(node, child)
124 check_nodes_props(c, dti, child);
125}
126
127static bool run_check(struct check *c, struct dt_info *dti)
128{
129 struct node *dt = dti->dt;
130 bool error = false;
131 int i;
132
133 assert(!c->inprogress);
134
135 if (c->status != UNCHECKED)
136 goto out;
137
138 c->inprogress = true;
139
140 for (i = 0; i < c->num_prereqs; i++) {
141 struct check *prq = c->prereq[i];
142 error = error || run_check(prq, dti);
143 if (prq->status != PASSED) {
144 c->status = PREREQ;
145 check_msg(c, dti, NULL, NULL, "Failed prerequisite '%s'",
146 c->prereq[i]->name);
147 }
148 }
149
150 if (c->status != UNCHECKED)
151 goto out;
152
153 check_nodes_props(c, dti, dt);
154
155 if (c->status == UNCHECKED)
156 c->status = PASSED;
157
158 TRACE(c, "\tCompleted, status %d", c->status);
159
160out:
161 c->inprogress = false;
162 if ((c->status != PASSED) && (c->error))
163 error = true;
164 return error;
165}
166
167/*
168 * Utility check functions
169 */
170
171/* A check which always fails, for testing purposes only */
172static inline void check_always_fail(struct check *c, struct dt_info *dti,
173 struct node *node)
174{
175 FAIL(c, dti, node, "always_fail check");
176}
177CHECK(always_fail, check_always_fail, NULL);
178
179static void check_is_string(struct check *c, struct dt_info *dti,
180 struct node *node)
181{
182 struct property *prop;
183 char *propname = c->data;
184
185 prop = get_property(node, propname);
186 if (!prop)
187 return; /* Not present, assumed ok */
188
189 if (!data_is_one_string(prop->val))
190 FAIL_PROP(c, dti, node, prop, "property is not a string");
191}
192#define WARNING_IF_NOT_STRING(nm, propname) \
193 WARNING(nm, check_is_string, (propname))
194#define ERROR_IF_NOT_STRING(nm, propname) \
195 ERROR(nm, check_is_string, (propname))
196
197static void check_is_string_list(struct check *c, struct dt_info *dti,
198 struct node *node)
199{
200 int rem, l;
201 struct property *prop;
202 char *propname = c->data;
203 char *str;
204
205 prop = get_property(node, propname);
206 if (!prop)
207 return; /* Not present, assumed ok */
208
209 str = prop->val.val;
210 rem = prop->val.len;
211 while (rem > 0) {
212 l = strnlen(str, rem);
213 if (l == rem) {
214 FAIL_PROP(c, dti, node, prop, "property is not a string list");
215 break;
216 }
217 rem -= l + 1;
218 str += l + 1;
219 }
220}
221#define WARNING_IF_NOT_STRING_LIST(nm, propname) \
222 WARNING(nm, check_is_string_list, (propname))
223#define ERROR_IF_NOT_STRING_LIST(nm, propname) \
224 ERROR(nm, check_is_string_list, (propname))
225
226static void check_is_cell(struct check *c, struct dt_info *dti,
227 struct node *node)
228{
229 struct property *prop;
230 char *propname = c->data;
231
232 prop = get_property(node, propname);
233 if (!prop)
234 return; /* Not present, assumed ok */
235
236 if (prop->val.len != sizeof(cell_t))
237 FAIL_PROP(c, dti, node, prop, "property is not a single cell");
238}
239#define WARNING_IF_NOT_CELL(nm, propname) \
240 WARNING(nm, check_is_cell, (propname))
241#define ERROR_IF_NOT_CELL(nm, propname) \
242 ERROR(nm, check_is_cell, (propname))
243
244/*
245 * Structural check functions
246 */
247
248static void check_duplicate_node_names(struct check *c, struct dt_info *dti,
249 struct node *node)
250{
251 struct node *child, *child2;
252
253 for_each_child(node, child)
254 for (child2 = child->next_sibling;
255 child2;
256 child2 = child2->next_sibling)
257 if (streq(child->name, child2->name))
258 FAIL(c, dti, node, "Duplicate node name");
259}
260ERROR(duplicate_node_names, check_duplicate_node_names, NULL);
261
262static void check_duplicate_property_names(struct check *c, struct dt_info *dti,
263 struct node *node)
264{
265 struct property *prop, *prop2;
266
267 for_each_property(node, prop) {
268 for (prop2 = prop->next; prop2; prop2 = prop2->next) {
269 if (prop2->deleted)
270 continue;
271 if (streq(prop->name, prop2->name))
272 FAIL_PROP(c, dti, node, prop, "Duplicate property name");
273 }
274 }
275}
276ERROR(duplicate_property_names, check_duplicate_property_names, NULL);
277
278#define LOWERCASE "abcdefghijklmnopqrstuvwxyz"
279#define UPPERCASE "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
280#define DIGITS "0123456789"
281#define PROPNODECHARS LOWERCASE UPPERCASE DIGITS ",._+*#?-"
282#define PROPNODECHARSSTRICT LOWERCASE UPPERCASE DIGITS ",-"
283
284static void check_node_name_chars(struct check *c, struct dt_info *dti,
285 struct node *node)
286{
287 int n = strspn(node->name, c->data);
288
289 if (n < strlen(node->name))
290 FAIL(c, dti, node, "Bad character '%c' in node name",
291 node->name[n]);
292}
293ERROR(node_name_chars, check_node_name_chars, PROPNODECHARS "@");
294
295static void check_node_name_chars_strict(struct check *c, struct dt_info *dti,
296 struct node *node)
297{
298 int n = strspn(node->name, c->data);
299
300 if (n < node->basenamelen)
301 FAIL(c, dti, node, "Character '%c' not recommended in node name",
302 node->name[n]);
303}
304CHECK(node_name_chars_strict, check_node_name_chars_strict, PROPNODECHARSSTRICT);
305
306static void check_node_name_format(struct check *c, struct dt_info *dti,
307 struct node *node)
308{
309 if (strchr(get_unitname(node), '@'))
310 FAIL(c, dti, node, "multiple '@' characters in node name");
311}
312ERROR(node_name_format, check_node_name_format, NULL, &node_name_chars);
313
314static void check_unit_address_vs_reg(struct check *c, struct dt_info *dti,
315 struct node *node)
316{
317 const char *unitname = get_unitname(node);
318 struct property *prop = get_property(node, "reg");
319
320 if (!prop) {
321 prop = get_property(node, "ranges");
322 if (prop && !prop->val.len)
323 prop = NULL;
324 }
325
326 if (prop) {
327 if (!unitname[0])
328 FAIL(c, dti, node, "node has a reg or ranges property, but no unit name");
329 } else {
330 if (unitname[0])
331 FAIL(c, dti, node, "node has a unit name, but no reg property");
332 }
333}
334WARNING(unit_address_vs_reg, check_unit_address_vs_reg, NULL);
335
336static void check_property_name_chars(struct check *c, struct dt_info *dti,
337 struct node *node)
338{
339 struct property *prop;
340
341 for_each_property(node, prop) {
342 int n = strspn(prop->name, c->data);
343
344 if (n < strlen(prop->name))
345 FAIL_PROP(c, dti, node, prop, "Bad character '%c' in property name",
346 prop->name[n]);
347 }
348}
349ERROR(property_name_chars, check_property_name_chars, PROPNODECHARS);
350
351static void check_property_name_chars_strict(struct check *c,
352 struct dt_info *dti,
353 struct node *node)
354{
355 struct property *prop;
356
357 for_each_property(node, prop) {
358 const char *name = prop->name;
359 int n = strspn(name, c->data);
360
361 if (n == strlen(prop->name))
362 continue;
363
364 /* Certain names are whitelisted */
365 if (streq(name, "device_type"))
366 continue;
367
368 /*
369 * # is only allowed at the beginning of property names not counting
370 * the vendor prefix.
371 */
372 if (name[n] == '#' && ((n == 0) || (name[n-1] == ','))) {
373 name += n + 1;
374 n = strspn(name, c->data);
375 }
376 if (n < strlen(name))
377 FAIL_PROP(c, dti, node, prop, "Character '%c' not recommended in property name",
378 name[n]);
379 }
380}
381CHECK(property_name_chars_strict, check_property_name_chars_strict, PROPNODECHARSSTRICT);
382
383#define DESCLABEL_FMT "%s%s%s%s%s"
384#define DESCLABEL_ARGS(node,prop,mark) \
385 ((mark) ? "value of " : ""), \
386 ((prop) ? "'" : ""), \
387 ((prop) ? (prop)->name : ""), \
388 ((prop) ? "' in " : ""), (node)->fullpath
389
390static void check_duplicate_label(struct check *c, struct dt_info *dti,
391 const char *label, struct node *node,
392 struct property *prop, struct marker *mark)
393{
394 struct node *dt = dti->dt;
395 struct node *othernode = NULL;
396 struct property *otherprop = NULL;
397 struct marker *othermark = NULL;
398
399 othernode = get_node_by_label(dt, label);
400
401 if (!othernode)
402 otherprop = get_property_by_label(dt, label, &othernode);
403 if (!othernode)
404 othermark = get_marker_label(dt, label, &othernode,
405 &otherprop);
406
407 if (!othernode)
408 return;
409
410 if ((othernode != node) || (otherprop != prop) || (othermark != mark))
411 FAIL(c, dti, node, "Duplicate label '%s' on " DESCLABEL_FMT
412 " and " DESCLABEL_FMT,
413 label, DESCLABEL_ARGS(node, prop, mark),
414 DESCLABEL_ARGS(othernode, otherprop, othermark));
415}
416
417static void check_duplicate_label_node(struct check *c, struct dt_info *dti,
418 struct node *node)
419{
420 struct label *l;
421 struct property *prop;
422
423 for_each_label(node->labels, l)
424 check_duplicate_label(c, dti, l->label, node, NULL, NULL);
425
426 for_each_property(node, prop) {
427 struct marker *m = prop->val.markers;
428
429 for_each_label(prop->labels, l)
430 check_duplicate_label(c, dti, l->label, node, prop, NULL);
431
432 for_each_marker_of_type(m, LABEL)
433 check_duplicate_label(c, dti, m->ref, node, prop, m);
434 }
435}
436ERROR(duplicate_label, check_duplicate_label_node, NULL);
437
438static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
439 struct node *node, const char *propname)
440{
441 struct node *root = dti->dt;
442 struct property *prop;
443 struct marker *m;
444 cell_t phandle;
445
446 prop = get_property(node, propname);
447 if (!prop)
448 return 0;
449
450 if (prop->val.len != sizeof(cell_t)) {
451 FAIL_PROP(c, dti, node, prop, "bad length (%d) %s property",
452 prop->val.len, prop->name);
453 return 0;
454 }
455
456 m = prop->val.markers;
457 for_each_marker_of_type(m, REF_PHANDLE) {
458 assert(m->offset == 0);
459 if (node != get_node_by_ref(root, m->ref))
460 /* "Set this node's phandle equal to some
461 * other node's phandle". That's nonsensical
462 * by construction. */ {
463 FAIL(c, dti, node, "%s is a reference to another node",
464 prop->name);
465 }
466 /* But setting this node's phandle equal to its own
467 * phandle is allowed - that means allocate a unique
468 * phandle for this node, even if it's not otherwise
469 * referenced. The value will be filled in later, so
470 * we treat it as having no phandle data for now. */
471 return 0;
472 }
473
474 phandle = propval_cell(prop);
475
476 if ((phandle == 0) || (phandle == -1)) {
477 FAIL_PROP(c, dti, node, prop, "bad value (0x%x) in %s property",
478 phandle, prop->name);
479 return 0;
480 }
481
482 return phandle;
483}
484
485static void check_explicit_phandles(struct check *c, struct dt_info *dti,
486 struct node *node)
487{
488 struct node *root = dti->dt;
489 struct node *other;
490 cell_t phandle, linux_phandle;
491
492 /* Nothing should have assigned phandles yet */
493 assert(!node->phandle);
494
495 phandle = check_phandle_prop(c, dti, node, "phandle");
496
497 linux_phandle = check_phandle_prop(c, dti, node, "linux,phandle");
498
499 if (!phandle && !linux_phandle)
500 /* No valid phandles; nothing further to check */
501 return;
502
503 if (linux_phandle && phandle && (phandle != linux_phandle))
504 FAIL(c, dti, node, "mismatching 'phandle' and 'linux,phandle'"
505 " properties");
506
507 if (linux_phandle && !phandle)
508 phandle = linux_phandle;
509
510 other = get_node_by_phandle(root, phandle);
511 if (other && (other != node)) {
512 FAIL(c, dti, node, "duplicated phandle 0x%x (seen before at %s)",
513 phandle, other->fullpath);
514 return;
515 }
516
517 node->phandle = phandle;
518}
519ERROR(explicit_phandles, check_explicit_phandles, NULL);
520
521static void check_name_properties(struct check *c, struct dt_info *dti,
522 struct node *node)
523{
524 struct property **pp, *prop = NULL;
525
526 for (pp = &node->proplist; *pp; pp = &((*pp)->next))
527 if (streq((*pp)->name, "name")) {
528 prop = *pp;
529 break;
530 }
531
532 if (!prop)
533 return; /* No name property, that's fine */
534
535 if ((prop->val.len != node->basenamelen+1)
536 || (memcmp(prop->val.val, node->name, node->basenamelen) != 0)) {
537 FAIL(c, dti, node, "\"name\" property is incorrect (\"%s\" instead"
538 " of base node name)", prop->val.val);
539 } else {
540 /* The name property is correct, and therefore redundant.
541 * Delete it */
542 *pp = prop->next;
543 free(prop->name);
544 data_free(prop->val);
545 free(prop);
546 }
547}
548ERROR_IF_NOT_STRING(name_is_string, "name");
549ERROR(name_properties, check_name_properties, NULL, &name_is_string);
550
551/*
552 * Reference fixup functions
553 */
554
555static void fixup_phandle_references(struct check *c, struct dt_info *dti,
556 struct node *node)
557{
558 struct node *dt = dti->dt;
559 struct property *prop;
560
561 for_each_property(node, prop) {
562 struct marker *m = prop->val.markers;
563 struct node *refnode;
564 cell_t phandle;
565
566 for_each_marker_of_type(m, REF_PHANDLE) {
567 assert(m->offset + sizeof(cell_t) <= prop->val.len);
568
569 refnode = get_node_by_ref(dt, m->ref);
570 if (! refnode) {
571 if (!(dti->dtsflags & DTSF_PLUGIN))
572 FAIL(c, dti, node, "Reference to non-existent node or "
573 "label \"%s\"\n", m->ref);
574 else /* mark the entry as unresolved */
575 *((fdt32_t *)(prop->val.val + m->offset)) =
576 cpu_to_fdt32(0xffffffff);
577 continue;
578 }
579
580 phandle = get_node_phandle(dt, refnode);
581 *((fdt32_t *)(prop->val.val + m->offset)) = cpu_to_fdt32(phandle);
582 }
583 }
584}
585ERROR(phandle_references, fixup_phandle_references, NULL,
586 &duplicate_node_names, &explicit_phandles);
587
588static void fixup_path_references(struct check *c, struct dt_info *dti,
589 struct node *node)
590{
591 struct node *dt = dti->dt;
592 struct property *prop;
593
594 for_each_property(node, prop) {
595 struct marker *m = prop->val.markers;
596 struct node *refnode;
597 char *path;
598
599 for_each_marker_of_type(m, REF_PATH) {
600 assert(m->offset <= prop->val.len);
601
602 refnode = get_node_by_ref(dt, m->ref);
603 if (!refnode) {
604 FAIL(c, dti, node, "Reference to non-existent node or label \"%s\"\n",
605 m->ref);
606 continue;
607 }
608
609 path = refnode->fullpath;
610 prop->val = data_insert_at_marker(prop->val, m, path,
611 strlen(path) + 1);
612 }
613 }
614}
615ERROR(path_references, fixup_path_references, NULL, &duplicate_node_names);
616
617/*
618 * Semantic checks
619 */
620WARNING_IF_NOT_CELL(address_cells_is_cell, "#address-cells");
621WARNING_IF_NOT_CELL(size_cells_is_cell, "#size-cells");
622WARNING_IF_NOT_CELL(interrupt_cells_is_cell, "#interrupt-cells");
623
624WARNING_IF_NOT_STRING(device_type_is_string, "device_type");
625WARNING_IF_NOT_STRING(model_is_string, "model");
626WARNING_IF_NOT_STRING(status_is_string, "status");
627WARNING_IF_NOT_STRING(label_is_string, "label");
628
629WARNING_IF_NOT_STRING_LIST(compatible_is_string_list, "compatible");
630
631static void check_names_is_string_list(struct check *c, struct dt_info *dti,
632 struct node *node)
633{
634 struct property *prop;
635
636 for_each_property(node, prop) {
637 const char *s = strrchr(prop->name, '-');
638 if (!s || !streq(s, "-names"))
639 continue;
640
641 c->data = prop->name;
642 check_is_string_list(c, dti, node);
643 }
644}
645WARNING(names_is_string_list, check_names_is_string_list, NULL);
646
647static void check_alias_paths(struct check *c, struct dt_info *dti,
648 struct node *node)
649{
650 struct property *prop;
651
652 if (!streq(node->name, "aliases"))
653 return;
654
655 for_each_property(node, prop) {
656 if (!prop->val.val || !get_node_by_path(dti->dt, prop->val.val)) {
657 FAIL_PROP(c, dti, node, prop, "aliases property is not a valid node (%s)",
658 prop->val.val);
659 continue;
660 }
661 if (strspn(prop->name, LOWERCASE DIGITS "-") != strlen(prop->name))
662 FAIL(c, dti, node, "aliases property name must include only lowercase and '-'");
663 }
664}
665WARNING(alias_paths, check_alias_paths, NULL);
666
667static void fixup_addr_size_cells(struct check *c, struct dt_info *dti,
668 struct node *node)
669{
670 struct property *prop;
671
672 node->addr_cells = -1;
673 node->size_cells = -1;
674
675 prop = get_property(node, "#address-cells");
676 if (prop)
677 node->addr_cells = propval_cell(prop);
678
679 prop = get_property(node, "#size-cells");
680 if (prop)
681 node->size_cells = propval_cell(prop);
682}
683WARNING(addr_size_cells, fixup_addr_size_cells, NULL,
684 &address_cells_is_cell, &size_cells_is_cell);
685
686#define node_addr_cells(n) \
687 (((n)->addr_cells == -1) ? 2 : (n)->addr_cells)
688#define node_size_cells(n) \
689 (((n)->size_cells == -1) ? 1 : (n)->size_cells)
690
691static void check_reg_format(struct check *c, struct dt_info *dti,
692 struct node *node)
693{
694 struct property *prop;
695 int addr_cells, size_cells, entrylen;
696
697 prop = get_property(node, "reg");
698 if (!prop)
699 return; /* No "reg", that's fine */
700
701 if (!node->parent) {
702 FAIL(c, dti, node, "Root node has a \"reg\" property");
703 return;
704 }
705
706 if (prop->val.len == 0)
707 FAIL_PROP(c, dti, node, prop, "property is empty");
708
709 addr_cells = node_addr_cells(node->parent);
710 size_cells = node_size_cells(node->parent);
711 entrylen = (addr_cells + size_cells) * sizeof(cell_t);
712
713 if (!entrylen || (prop->val.len % entrylen) != 0)
714 FAIL_PROP(c, dti, node, prop, "property has invalid length (%d bytes) "
715 "(#address-cells == %d, #size-cells == %d)",
716 prop->val.len, addr_cells, size_cells);
717}
718WARNING(reg_format, check_reg_format, NULL, &addr_size_cells);
719
720static void check_ranges_format(struct check *c, struct dt_info *dti,
721 struct node *node)
722{
723 struct property *prop;
724 int c_addr_cells, p_addr_cells, c_size_cells, p_size_cells, entrylen;
725
726 prop = get_property(node, "ranges");
727 if (!prop)
728 return;
729
730 if (!node->parent) {
731 FAIL_PROP(c, dti, node, prop, "Root node has a \"ranges\" property");
732 return;
733 }
734
735 p_addr_cells = node_addr_cells(node->parent);
736 p_size_cells = node_size_cells(node->parent);
737 c_addr_cells = node_addr_cells(node);
738 c_size_cells = node_size_cells(node);
739 entrylen = (p_addr_cells + c_addr_cells + c_size_cells) * sizeof(cell_t);
740
741 if (prop->val.len == 0) {
742 if (p_addr_cells != c_addr_cells)
743 FAIL_PROP(c, dti, node, prop, "empty \"ranges\" property but its "
744 "#address-cells (%d) differs from %s (%d)",
745 c_addr_cells, node->parent->fullpath,
746 p_addr_cells);
747 if (p_size_cells != c_size_cells)
748 FAIL_PROP(c, dti, node, prop, "empty \"ranges\" property but its "
749 "#size-cells (%d) differs from %s (%d)",
750 c_size_cells, node->parent->fullpath,
751 p_size_cells);
752 } else if ((prop->val.len % entrylen) != 0) {
753 FAIL_PROP(c, dti, node, prop, "\"ranges\" property has invalid length (%d bytes) "
754 "(parent #address-cells == %d, child #address-cells == %d, "
755 "#size-cells == %d)", prop->val.len,
756 p_addr_cells, c_addr_cells, c_size_cells);
757 }
758}
759WARNING(ranges_format, check_ranges_format, NULL, &addr_size_cells);
760
761static const struct bus_type pci_bus = {
762 .name = "PCI",
763};
764
765static void check_pci_bridge(struct check *c, struct dt_info *dti, struct node *node)
766{
767 struct property *prop;
768 cell_t *cells;
769
770 prop = get_property(node, "device_type");
771 if (!prop || !streq(prop->val.val, "pci"))
772 return;
773
774 node->bus = &pci_bus;
775
776 if (!strprefixeq(node->name, node->basenamelen, "pci") &&
777 !strprefixeq(node->name, node->basenamelen, "pcie"))
778 FAIL(c, dti, node, "node name is not \"pci\" or \"pcie\"");
779
780 prop = get_property(node, "ranges");
781 if (!prop)
782 FAIL(c, dti, node, "missing ranges for PCI bridge (or not a bridge)");
783
784 if (node_addr_cells(node) != 3)
785 FAIL(c, dti, node, "incorrect #address-cells for PCI bridge");
786 if (node_size_cells(node) != 2)
787 FAIL(c, dti, node, "incorrect #size-cells for PCI bridge");
788
789 prop = get_property(node, "bus-range");
790 if (!prop)
791 return;
792
793 if (prop->val.len != (sizeof(cell_t) * 2)) {
794 FAIL_PROP(c, dti, node, prop, "value must be 2 cells");
795 return;
796 }
797 cells = (cell_t *)prop->val.val;
798 if (fdt32_to_cpu(cells[0]) > fdt32_to_cpu(cells[1]))
799 FAIL_PROP(c, dti, node, prop, "1st cell must be less than or equal to 2nd cell");
800 if (fdt32_to_cpu(cells[1]) > 0xff)
801 FAIL_PROP(c, dti, node, prop, "maximum bus number must be less than 256");
802}
803WARNING(pci_bridge, check_pci_bridge, NULL,
804 &device_type_is_string, &addr_size_cells);
805
806static void check_pci_device_bus_num(struct check *c, struct dt_info *dti, struct node *node)
807{
808 struct property *prop;
809 unsigned int bus_num, min_bus, max_bus;
810 cell_t *cells;
811
812 if (!node->parent || (node->parent->bus != &pci_bus))
813 return;
814
815 prop = get_property(node, "reg");
816 if (!prop)
817 return;
818
819 cells = (cell_t *)prop->val.val;
820 bus_num = (fdt32_to_cpu(cells[0]) & 0x00ff0000) >> 16;
821
822 prop = get_property(node->parent, "bus-range");
823 if (!prop) {
824 min_bus = max_bus = 0;
825 } else {
826 cells = (cell_t *)prop->val.val;
827 min_bus = fdt32_to_cpu(cells[0]);
828 max_bus = fdt32_to_cpu(cells[0]);
829 }
830 if ((bus_num < min_bus) || (bus_num > max_bus))
831 FAIL_PROP(c, dti, node, prop, "PCI bus number %d out of range, expected (%d - %d)",
832 bus_num, min_bus, max_bus);
833}
834WARNING(pci_device_bus_num, check_pci_device_bus_num, NULL, ®_format, &pci_bridge);
835
836static void check_pci_device_reg(struct check *c, struct dt_info *dti, struct node *node)
837{
838 struct property *prop;
839 const char *unitname = get_unitname(node);
840 char unit_addr[5];
841 unsigned int dev, func, reg;
842 cell_t *cells;
843
844 if (!node->parent || (node->parent->bus != &pci_bus))
845 return;
846
847 prop = get_property(node, "reg");
848 if (!prop) {
849 FAIL(c, dti, node, "missing PCI reg property");
850 return;
851 }
852
853 cells = (cell_t *)prop->val.val;
854 if (cells[1] || cells[2])
855 FAIL_PROP(c, dti, node, prop, "PCI reg config space address cells 2 and 3 must be 0");
856
857 reg = fdt32_to_cpu(cells[0]);
858 dev = (reg & 0xf800) >> 11;
859 func = (reg & 0x700) >> 8;
860
861 if (reg & 0xff000000)
862 FAIL_PROP(c, dti, node, prop, "PCI reg address is not configuration space");
863 if (reg & 0x000000ff)
864 FAIL_PROP(c, dti, node, prop, "PCI reg config space address register number must be 0");
865
866 if (func == 0) {
867 snprintf(unit_addr, sizeof(unit_addr), "%x", dev);
868 if (streq(unitname, unit_addr))
869 return;
870 }
871
872 snprintf(unit_addr, sizeof(unit_addr), "%x,%x", dev, func);
873 if (streq(unitname, unit_addr))
874 return;
875
876 FAIL(c, dti, node, "PCI unit address format error, expected \"%s\"",
877 unit_addr);
878}
879WARNING(pci_device_reg, check_pci_device_reg, NULL, ®_format, &pci_bridge);
880
881static const struct bus_type simple_bus = {
882 .name = "simple-bus",
883};
884
885static bool node_is_compatible(struct node *node, const char *compat)
886{
887 struct property *prop;
888 const char *str, *end;
889
890 prop = get_property(node, "compatible");
891 if (!prop)
892 return false;
893
894 for (str = prop->val.val, end = str + prop->val.len; str < end;
895 str += strnlen(str, end - str) + 1) {
896 if (strprefixeq(str, end - str, compat))
897 return true;
898 }
899 return false;
900}
901
902static void check_simple_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
903{
904 if (node_is_compatible(node, "simple-bus"))
905 node->bus = &simple_bus;
906}
907WARNING(simple_bus_bridge, check_simple_bus_bridge, NULL, &addr_size_cells);
908
909static void check_simple_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
910{
911 struct property *prop;
912 const char *unitname = get_unitname(node);
913 char unit_addr[17];
914 unsigned int size;
915 uint64_t reg = 0;
916 cell_t *cells = NULL;
917
918 if (!node->parent || (node->parent->bus != &simple_bus))
919 return;
920
921 prop = get_property(node, "reg");
922 if (prop)
923 cells = (cell_t *)prop->val.val;
924 else {
925 prop = get_property(node, "ranges");
926 if (prop && prop->val.len)
927 /* skip of child address */
928 cells = ((cell_t *)prop->val.val) + node_addr_cells(node);
929 }
930
931 if (!cells) {
932 if (node->parent->parent && !(node->bus == &simple_bus))
933 FAIL(c, dti, node, "missing or empty reg/ranges property");
934 return;
935 }
936
937 size = node_addr_cells(node->parent);
938 while (size--)
939 reg = (reg << 32) | fdt32_to_cpu(*(cells++));
940
941 snprintf(unit_addr, sizeof(unit_addr), "%"PRIx64, reg);
942 if (!streq(unitname, unit_addr))
943 FAIL(c, dti, node, "simple-bus unit address format error, expected \"%s\"",
944 unit_addr);
945}
946WARNING(simple_bus_reg, check_simple_bus_reg, NULL, ®_format, &simple_bus_bridge);
947
948static void check_unit_address_format(struct check *c, struct dt_info *dti,
949 struct node *node)
950{
951 const char *unitname = get_unitname(node);
952
953 if (node->parent && node->parent->bus)
954 return;
955
956 if (!unitname[0])
957 return;
958
959 if (!strncmp(unitname, "0x", 2)) {
960 FAIL(c, dti, node, "unit name should not have leading \"0x\"");
961 /* skip over 0x for next test */
962 unitname += 2;
963 }
964 if (unitname[0] == '0' && isxdigit(unitname[1]))
965 FAIL(c, dti, node, "unit name should not have leading 0s");
966}
967WARNING(unit_address_format, check_unit_address_format, NULL,
968 &node_name_format, &pci_bridge, &simple_bus_bridge);
969
970/*
971 * Style checks
972 */
973static void check_avoid_default_addr_size(struct check *c, struct dt_info *dti,
974 struct node *node)
975{
976 struct property *reg, *ranges;
977
978 if (!node->parent)
979 return; /* Ignore root node */
980
981 reg = get_property(node, "reg");
982 ranges = get_property(node, "ranges");
983
984 if (!reg && !ranges)
985 return;
986
987 if (node->parent->addr_cells == -1)
988 FAIL(c, dti, node, "Relying on default #address-cells value");
989
990 if (node->parent->size_cells == -1)
991 FAIL(c, dti, node, "Relying on default #size-cells value");
992}
993WARNING(avoid_default_addr_size, check_avoid_default_addr_size, NULL,
994 &addr_size_cells);
995
996static void check_avoid_unnecessary_addr_size(struct check *c, struct dt_info *dti,
997 struct node *node)
998{
999 struct property *prop;
1000 struct node *child;
1001 bool has_reg = false;
1002
1003 if (!node->parent || node->addr_cells < 0 || node->size_cells < 0)
1004 return;
1005
1006 if (get_property(node, "ranges") || !node->children)
1007 return;
1008
1009 for_each_child(node, child) {
1010 prop = get_property(child, "reg");
1011 if (prop)
1012 has_reg = true;
1013 }
1014
1015 if (!has_reg)
1016 FAIL(c, dti, node, "unnecessary #address-cells/#size-cells without \"ranges\" or child \"reg\" property");
1017}
1018WARNING(avoid_unnecessary_addr_size, check_avoid_unnecessary_addr_size, NULL, &avoid_default_addr_size);
1019
1020static void check_obsolete_chosen_interrupt_controller(struct check *c,
1021 struct dt_info *dti,
1022 struct node *node)
1023{
1024 struct node *dt = dti->dt;
1025 struct node *chosen;
1026 struct property *prop;
1027
1028 if (node != dt)
1029 return;
1030
1031
1032 chosen = get_node_by_path(dt, "/chosen");
1033 if (!chosen)
1034 return;
1035
1036 prop = get_property(chosen, "interrupt-controller");
1037 if (prop)
1038 FAIL_PROP(c, dti, node, prop,
1039 "/chosen has obsolete \"interrupt-controller\" property");
1040}
1041WARNING(obsolete_chosen_interrupt_controller,
1042 check_obsolete_chosen_interrupt_controller, NULL);
1043
1044static void check_chosen_node_is_root(struct check *c, struct dt_info *dti,
1045 struct node *node)
1046{
1047 if (!streq(node->name, "chosen"))
1048 return;
1049
1050 if (node->parent != dti->dt)
1051 FAIL(c, dti, node, "chosen node must be at root node");
1052}
1053WARNING(chosen_node_is_root, check_chosen_node_is_root, NULL);
1054
1055static void check_chosen_node_bootargs(struct check *c, struct dt_info *dti,
1056 struct node *node)
1057{
1058 struct property *prop;
1059
1060 if (!streq(node->name, "chosen"))
1061 return;
1062
1063 prop = get_property(node, "bootargs");
1064 if (!prop)
1065 return;
1066
1067 c->data = prop->name;
1068 check_is_string(c, dti, node);
1069}
1070WARNING(chosen_node_bootargs, check_chosen_node_bootargs, NULL);
1071
1072static void check_chosen_node_stdout_path(struct check *c, struct dt_info *dti,
1073 struct node *node)
1074{
1075 struct property *prop;
1076
1077 if (!streq(node->name, "chosen"))
1078 return;
1079
1080 prop = get_property(node, "stdout-path");
1081 if (!prop) {
1082 prop = get_property(node, "linux,stdout-path");
1083 if (!prop)
1084 return;
1085 FAIL_PROP(c, dti, node, prop, "Use 'stdout-path' instead");
1086 }
1087
1088 c->data = prop->name;
1089 check_is_string(c, dti, node);
1090}
1091WARNING(chosen_node_stdout_path, check_chosen_node_stdout_path, NULL);
1092
1093struct provider {
1094 const char *prop_name;
1095 const char *cell_name;
1096 bool optional;
1097};
1098
1099static void check_property_phandle_args(struct check *c,
1100 struct dt_info *dti,
1101 struct node *node,
1102 struct property *prop,
1103 const struct provider *provider)
1104{
1105 struct node *root = dti->dt;
1106 int cell, cellsize = 0;
1107
1108 if (prop->val.len % sizeof(cell_t)) {
1109 FAIL_PROP(c, dti, node, prop,
1110 "property size (%d) is invalid, expected multiple of %zu",
1111 prop->val.len, sizeof(cell_t));
1112 return;
1113 }
1114
1115 for (cell = 0; cell < prop->val.len / sizeof(cell_t); cell += cellsize + 1) {
1116 struct node *provider_node;
1117 struct property *cellprop;
1118 int phandle;
1119
1120 phandle = propval_cell_n(prop, cell);
1121 /*
1122 * Some bindings use a cell value 0 or -1 to skip over optional
1123 * entries when each index position has a specific definition.
1124 */
1125 if (phandle == 0 || phandle == -1) {
1126 /* Give up if this is an overlay with external references */
1127 if (dti->dtsflags & DTSF_PLUGIN)
1128 break;
1129
1130 cellsize = 0;
1131 continue;
1132 }
1133
1134 /* If we have markers, verify the current cell is a phandle */
1135 if (prop->val.markers) {
1136 struct marker *m = prop->val.markers;
1137 for_each_marker_of_type(m, REF_PHANDLE) {
1138 if (m->offset == (cell * sizeof(cell_t)))
1139 break;
1140 }
1141 if (!m)
1142 FAIL_PROP(c, dti, node, prop,
1143 "cell %d is not a phandle reference",
1144 cell);
1145 }
1146
1147 provider_node = get_node_by_phandle(root, phandle);
1148 if (!provider_node) {
1149 FAIL_PROP(c, dti, node, prop,
1150 "Could not get phandle node for (cell %d)",
1151 cell);
1152 break;
1153 }
1154
1155 cellprop = get_property(provider_node, provider->cell_name);
1156 if (cellprop) {
1157 cellsize = propval_cell(cellprop);
1158 } else if (provider->optional) {
1159 cellsize = 0;
1160 } else {
1161 FAIL(c, dti, node, "Missing property '%s' in node %s or bad phandle (referred from %s[%d])",
1162 provider->cell_name,
1163 provider_node->fullpath,
1164 prop->name, cell);
1165 break;
1166 }
1167
1168 if (prop->val.len < ((cell + cellsize + 1) * sizeof(cell_t))) {
1169 FAIL_PROP(c, dti, node, prop,
1170 "property size (%d) too small for cell size %d",
1171 prop->val.len, cellsize);
1172 }
1173 }
1174}
1175
1176static void check_provider_cells_property(struct check *c,
1177 struct dt_info *dti,
1178 struct node *node)
1179{
1180 struct provider *provider = c->data;
1181 struct property *prop;
1182
1183 prop = get_property(node, provider->prop_name);
1184 if (!prop)
1185 return;
1186
1187 check_property_phandle_args(c, dti, node, prop, provider);
1188}
1189#define WARNING_PROPERTY_PHANDLE_CELLS(nm, propname, cells_name, ...) \
1190 static struct provider nm##_provider = { (propname), (cells_name), __VA_ARGS__ }; \
1191 WARNING(nm##_property, check_provider_cells_property, &nm##_provider, &phandle_references);
1192
1193WARNING_PROPERTY_PHANDLE_CELLS(clocks, "clocks", "#clock-cells");
1194WARNING_PROPERTY_PHANDLE_CELLS(cooling_device, "cooling-device", "#cooling-cells");
1195WARNING_PROPERTY_PHANDLE_CELLS(dmas, "dmas", "#dma-cells");
1196WARNING_PROPERTY_PHANDLE_CELLS(hwlocks, "hwlocks", "#hwlock-cells");
1197WARNING_PROPERTY_PHANDLE_CELLS(interrupts_extended, "interrupts-extended", "#interrupt-cells");
1198WARNING_PROPERTY_PHANDLE_CELLS(io_channels, "io-channels", "#io-channel-cells");
1199WARNING_PROPERTY_PHANDLE_CELLS(iommus, "iommus", "#iommu-cells");
1200WARNING_PROPERTY_PHANDLE_CELLS(mboxes, "mboxes", "#mbox-cells");
1201WARNING_PROPERTY_PHANDLE_CELLS(msi_parent, "msi-parent", "#msi-cells", true);
1202WARNING_PROPERTY_PHANDLE_CELLS(mux_controls, "mux-controls", "#mux-control-cells");
1203WARNING_PROPERTY_PHANDLE_CELLS(phys, "phys", "#phy-cells");
1204WARNING_PROPERTY_PHANDLE_CELLS(power_domains, "power-domains", "#power-domain-cells");
1205WARNING_PROPERTY_PHANDLE_CELLS(pwms, "pwms", "#pwm-cells");
1206WARNING_PROPERTY_PHANDLE_CELLS(resets, "resets", "#reset-cells");
1207WARNING_PROPERTY_PHANDLE_CELLS(sound_dai, "sound-dai", "#sound-dai-cells");
1208WARNING_PROPERTY_PHANDLE_CELLS(thermal_sensors, "thermal-sensors", "#thermal-sensor-cells");
1209
1210static bool prop_is_gpio(struct property *prop)
1211{
1212 char *str;
1213
1214 /*
1215 * *-gpios and *-gpio can appear in property names,
1216 * so skip over any false matches (only one known ATM)
1217 */
1218 if (strstr(prop->name, "nr-gpio"))
1219 return false;
1220
1221 str = strrchr(prop->name, '-');
1222 if (str)
1223 str++;
1224 else
1225 str = prop->name;
1226 if (!(streq(str, "gpios") || streq(str, "gpio")))
1227 return false;
1228
1229 return true;
1230}
1231
1232static void check_gpios_property(struct check *c,
1233 struct dt_info *dti,
1234 struct node *node)
1235{
1236 struct property *prop;
1237
1238 /* Skip GPIO hog nodes which have 'gpios' property */
1239 if (get_property(node, "gpio-hog"))
1240 return;
1241
1242 for_each_property(node, prop) {
1243 struct provider provider;
1244
1245 if (!prop_is_gpio(prop))
1246 continue;
1247
1248 provider.prop_name = prop->name;
1249 provider.cell_name = "#gpio-cells";
1250 provider.optional = false;
1251 check_property_phandle_args(c, dti, node, prop, &provider);
1252 }
1253
1254}
1255WARNING(gpios_property, check_gpios_property, NULL, &phandle_references);
1256
1257static void check_deprecated_gpio_property(struct check *c,
1258 struct dt_info *dti,
1259 struct node *node)
1260{
1261 struct property *prop;
1262
1263 for_each_property(node, prop) {
1264 char *str;
1265
1266 if (!prop_is_gpio(prop))
1267 continue;
1268
1269 str = strstr(prop->name, "gpio");
1270 if (!streq(str, "gpio"))
1271 continue;
1272
1273 FAIL_PROP(c, dti, node, prop,
1274 "'[*-]gpio' is deprecated, use '[*-]gpios' instead");
1275 }
1276
1277}
1278CHECK(deprecated_gpio_property, check_deprecated_gpio_property, NULL);
1279
1280static bool node_is_interrupt_provider(struct node *node)
1281{
1282 struct property *prop;
1283
1284 prop = get_property(node, "interrupt-controller");
1285 if (prop)
1286 return true;
1287
1288 prop = get_property(node, "interrupt-map");
1289 if (prop)
1290 return true;
1291
1292 return false;
1293}
1294static void check_interrupts_property(struct check *c,
1295 struct dt_info *dti,
1296 struct node *node)
1297{
1298 struct node *root = dti->dt;
1299 struct node *irq_node = NULL, *parent = node;
1300 struct property *irq_prop, *prop = NULL;
1301 int irq_cells, phandle;
1302
1303 irq_prop = get_property(node, "interrupts");
1304 if (!irq_prop)
1305 return;
1306
1307 if (irq_prop->val.len % sizeof(cell_t))
1308 FAIL_PROP(c, dti, node, irq_prop, "size (%d) is invalid, expected multiple of %zu",
1309 irq_prop->val.len, sizeof(cell_t));
1310
1311 while (parent && !prop) {
1312 if (parent != node && node_is_interrupt_provider(parent)) {
1313 irq_node = parent;
1314 break;
1315 }
1316
1317 prop = get_property(parent, "interrupt-parent");
1318 if (prop) {
1319 phandle = propval_cell(prop);
1320 /* Give up if this is an overlay with external references */
1321 if ((phandle == 0 || phandle == -1) &&
1322 (dti->dtsflags & DTSF_PLUGIN))
1323 return;
1324
1325 irq_node = get_node_by_phandle(root, phandle);
1326 if (!irq_node) {
1327 FAIL_PROP(c, dti, parent, prop, "Bad phandle");
1328 return;
1329 }
1330 if (!node_is_interrupt_provider(irq_node))
1331 FAIL(c, dti, irq_node,
1332 "Missing interrupt-controller or interrupt-map property");
1333
1334 break;
1335 }
1336
1337 parent = parent->parent;
1338 }
1339
1340 if (!irq_node) {
1341 FAIL(c, dti, node, "Missing interrupt-parent");
1342 return;
1343 }
1344
1345 prop = get_property(irq_node, "#interrupt-cells");
1346 if (!prop) {
1347 FAIL(c, dti, irq_node, "Missing #interrupt-cells in interrupt-parent");
1348 return;
1349 }
1350
1351 irq_cells = propval_cell(prop);
1352 if (irq_prop->val.len % (irq_cells * sizeof(cell_t))) {
1353 FAIL_PROP(c, dti, node, prop,
1354 "size is (%d), expected multiple of %d",
1355 irq_prop->val.len, (int)(irq_cells * sizeof(cell_t)));
1356 }
1357}
1358WARNING(interrupts_property, check_interrupts_property, &phandle_references);
1359
1360static struct check *check_table[] = {
1361 &duplicate_node_names, &duplicate_property_names,
1362 &node_name_chars, &node_name_format, &property_name_chars,
1363 &name_is_string, &name_properties,
1364
1365 &duplicate_label,
1366
1367 &explicit_phandles,
1368 &phandle_references, &path_references,
1369
1370 &address_cells_is_cell, &size_cells_is_cell, &interrupt_cells_is_cell,
1371 &device_type_is_string, &model_is_string, &status_is_string,
1372 &label_is_string,
1373
1374 &compatible_is_string_list, &names_is_string_list,
1375
1376 &property_name_chars_strict,
1377 &node_name_chars_strict,
1378
1379 &addr_size_cells, ®_format, &ranges_format,
1380
1381 &unit_address_vs_reg,
1382 &unit_address_format,
1383
1384 &pci_bridge,
1385 &pci_device_reg,
1386 &pci_device_bus_num,
1387
1388 &simple_bus_bridge,
1389 &simple_bus_reg,
1390
1391 &avoid_default_addr_size,
1392 &avoid_unnecessary_addr_size,
1393 &obsolete_chosen_interrupt_controller,
1394 &chosen_node_is_root, &chosen_node_bootargs, &chosen_node_stdout_path,
1395
1396 &clocks_property,
1397 &cooling_device_property,
1398 &dmas_property,
1399 &hwlocks_property,
1400 &interrupts_extended_property,
1401 &io_channels_property,
1402 &iommus_property,
1403 &mboxes_property,
1404 &msi_parent_property,
1405 &mux_controls_property,
1406 &phys_property,
1407 &power_domains_property,
1408 &pwms_property,
1409 &resets_property,
1410 &sound_dai_property,
1411 &thermal_sensors_property,
1412
1413 &deprecated_gpio_property,
1414 &gpios_property,
1415 &interrupts_property,
1416
1417 &alias_paths,
1418
1419 &always_fail,
1420};
1421
1422static void enable_warning_error(struct check *c, bool warn, bool error)
1423{
1424 int i;
1425
1426 /* Raising level, also raise it for prereqs */
1427 if ((warn && !c->warn) || (error && !c->error))
1428 for (i = 0; i < c->num_prereqs; i++)
1429 enable_warning_error(c->prereq[i], warn, error);
1430
1431 c->warn = c->warn || warn;
1432 c->error = c->error || error;
1433}
1434
1435static void disable_warning_error(struct check *c, bool warn, bool error)
1436{
1437 int i;
1438
1439 /* Lowering level, also lower it for things this is the prereq
1440 * for */
1441 if ((warn && c->warn) || (error && c->error)) {
1442 for (i = 0; i < ARRAY_SIZE(check_table); i++) {
1443 struct check *cc = check_table[i];
1444 int j;
1445
1446 for (j = 0; j < cc->num_prereqs; j++)
1447 if (cc->prereq[j] == c)
1448 disable_warning_error(cc, warn, error);
1449 }
1450 }
1451
1452 c->warn = c->warn && !warn;
1453 c->error = c->error && !error;
1454}
1455
1456void parse_checks_option(bool warn, bool error, const char *arg)
1457{
1458 int i;
1459 const char *name = arg;
1460 bool enable = true;
1461
1462 if ((strncmp(arg, "no-", 3) == 0)
1463 || (strncmp(arg, "no_", 3) == 0)) {
1464 name = arg + 3;
1465 enable = false;
1466 }
1467
1468 for (i = 0; i < ARRAY_SIZE(check_table); i++) {
1469 struct check *c = check_table[i];
1470
1471 if (streq(c->name, name)) {
1472 if (enable)
1473 enable_warning_error(c, warn, error);
1474 else
1475 disable_warning_error(c, warn, error);
1476 return;
1477 }
1478 }
1479
1480 die("Unrecognized check name \"%s\"\n", name);
1481}
1482
1483void process_checks(bool force, struct dt_info *dti)
1484{
1485 int i;
1486 int error = 0;
1487
1488 for (i = 0; i < ARRAY_SIZE(check_table); i++) {
1489 struct check *c = check_table[i];
1490
1491 if (c->warn || c->error)
1492 error = error || run_check(c, dti);
1493 }
1494
1495 if (error) {
1496 if (!force) {
1497 fprintf(stderr, "ERROR: Input tree has errors, aborting "
1498 "(use -f to force output)\n");
1499 exit(2);
1500 } else if (quiet < 3) {
1501 fprintf(stderr, "Warning: Input tree has errors, "
1502 "output forced\n");
1503 }
1504 }
1505}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2007.
4 */
5
6#include "dtc.h"
7#include "srcpos.h"
8
9#ifdef TRACE_CHECKS
10#define TRACE(c, ...) \
11 do { \
12 fprintf(stderr, "=== %s: ", (c)->name); \
13 fprintf(stderr, __VA_ARGS__); \
14 fprintf(stderr, "\n"); \
15 } while (0)
16#else
17#define TRACE(c, fmt, ...) do { } while (0)
18#endif
19
20enum checkstatus {
21 UNCHECKED = 0,
22 PREREQ,
23 PASSED,
24 FAILED,
25};
26
27struct check;
28
29typedef void (*check_fn)(struct check *c, struct dt_info *dti, struct node *node);
30
31struct check {
32 const char *name;
33 check_fn fn;
34 void *data;
35 bool warn, error;
36 enum checkstatus status;
37 bool inprogress;
38 int num_prereqs;
39 struct check **prereq;
40};
41
42#define CHECK_ENTRY(nm_, fn_, d_, w_, e_, ...) \
43 static struct check *nm_##_prereqs[] = { __VA_ARGS__ }; \
44 static struct check nm_ = { \
45 .name = #nm_, \
46 .fn = (fn_), \
47 .data = (d_), \
48 .warn = (w_), \
49 .error = (e_), \
50 .status = UNCHECKED, \
51 .num_prereqs = ARRAY_SIZE(nm_##_prereqs), \
52 .prereq = nm_##_prereqs, \
53 };
54#define WARNING(nm_, fn_, d_, ...) \
55 CHECK_ENTRY(nm_, fn_, d_, true, false, __VA_ARGS__)
56#define ERROR(nm_, fn_, d_, ...) \
57 CHECK_ENTRY(nm_, fn_, d_, false, true, __VA_ARGS__)
58#define CHECK(nm_, fn_, d_, ...) \
59 CHECK_ENTRY(nm_, fn_, d_, false, false, __VA_ARGS__)
60
61static inline void PRINTF(5, 6) check_msg(struct check *c, struct dt_info *dti,
62 struct node *node,
63 struct property *prop,
64 const char *fmt, ...)
65{
66 va_list ap;
67 char *str = NULL;
68 struct srcpos *pos = NULL;
69 char *file_str;
70
71 if (!(c->warn && (quiet < 1)) && !(c->error && (quiet < 2)))
72 return;
73
74 if (prop && prop->srcpos)
75 pos = prop->srcpos;
76 else if (node && node->srcpos)
77 pos = node->srcpos;
78
79 if (pos) {
80 file_str = srcpos_string(pos);
81 xasprintf(&str, "%s", file_str);
82 free(file_str);
83 } else if (streq(dti->outname, "-")) {
84 xasprintf(&str, "<stdout>");
85 } else {
86 xasprintf(&str, "%s", dti->outname);
87 }
88
89 xasprintf_append(&str, ": %s (%s): ",
90 (c->error) ? "ERROR" : "Warning", c->name);
91
92 if (node) {
93 if (prop)
94 xasprintf_append(&str, "%s:%s: ", node->fullpath, prop->name);
95 else
96 xasprintf_append(&str, "%s: ", node->fullpath);
97 }
98
99 va_start(ap, fmt);
100 xavsprintf_append(&str, fmt, ap);
101 va_end(ap);
102
103 xasprintf_append(&str, "\n");
104
105 if (!prop && pos) {
106 pos = node->srcpos;
107 while (pos->next) {
108 pos = pos->next;
109
110 file_str = srcpos_string(pos);
111 xasprintf_append(&str, " also defined at %s\n", file_str);
112 free(file_str);
113 }
114 }
115
116 fputs(str, stderr);
117}
118
119#define FAIL(c, dti, node, ...) \
120 do { \
121 TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
122 (c)->status = FAILED; \
123 check_msg((c), dti, node, NULL, __VA_ARGS__); \
124 } while (0)
125
126#define FAIL_PROP(c, dti, node, prop, ...) \
127 do { \
128 TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
129 (c)->status = FAILED; \
130 check_msg((c), dti, node, prop, __VA_ARGS__); \
131 } while (0)
132
133
134static void check_nodes_props(struct check *c, struct dt_info *dti, struct node *node)
135{
136 struct node *child;
137
138 TRACE(c, "%s", node->fullpath);
139 if (c->fn)
140 c->fn(c, dti, node);
141
142 for_each_child(node, child)
143 check_nodes_props(c, dti, child);
144}
145
146static bool run_check(struct check *c, struct dt_info *dti)
147{
148 struct node *dt = dti->dt;
149 bool error = false;
150 int i;
151
152 assert(!c->inprogress);
153
154 if (c->status != UNCHECKED)
155 goto out;
156
157 c->inprogress = true;
158
159 for (i = 0; i < c->num_prereqs; i++) {
160 struct check *prq = c->prereq[i];
161 error = error || run_check(prq, dti);
162 if (prq->status != PASSED) {
163 c->status = PREREQ;
164 check_msg(c, dti, NULL, NULL, "Failed prerequisite '%s'",
165 c->prereq[i]->name);
166 }
167 }
168
169 if (c->status != UNCHECKED)
170 goto out;
171
172 check_nodes_props(c, dti, dt);
173
174 if (c->status == UNCHECKED)
175 c->status = PASSED;
176
177 TRACE(c, "\tCompleted, status %d", c->status);
178
179out:
180 c->inprogress = false;
181 if ((c->status != PASSED) && (c->error))
182 error = true;
183 return error;
184}
185
186/*
187 * Utility check functions
188 */
189
190/* A check which always fails, for testing purposes only */
191static inline void check_always_fail(struct check *c, struct dt_info *dti,
192 struct node *node)
193{
194 FAIL(c, dti, node, "always_fail check");
195}
196CHECK(always_fail, check_always_fail, NULL);
197
198static void check_is_string(struct check *c, struct dt_info *dti,
199 struct node *node)
200{
201 struct property *prop;
202 char *propname = c->data;
203
204 prop = get_property(node, propname);
205 if (!prop)
206 return; /* Not present, assumed ok */
207
208 if (!data_is_one_string(prop->val))
209 FAIL_PROP(c, dti, node, prop, "property is not a string");
210}
211#define WARNING_IF_NOT_STRING(nm, propname) \
212 WARNING(nm, check_is_string, (propname))
213#define ERROR_IF_NOT_STRING(nm, propname) \
214 ERROR(nm, check_is_string, (propname))
215
216static void check_is_string_list(struct check *c, struct dt_info *dti,
217 struct node *node)
218{
219 int rem, l;
220 struct property *prop;
221 char *propname = c->data;
222 char *str;
223
224 prop = get_property(node, propname);
225 if (!prop)
226 return; /* Not present, assumed ok */
227
228 str = prop->val.val;
229 rem = prop->val.len;
230 while (rem > 0) {
231 l = strnlen(str, rem);
232 if (l == rem) {
233 FAIL_PROP(c, dti, node, prop, "property is not a string list");
234 break;
235 }
236 rem -= l + 1;
237 str += l + 1;
238 }
239}
240#define WARNING_IF_NOT_STRING_LIST(nm, propname) \
241 WARNING(nm, check_is_string_list, (propname))
242#define ERROR_IF_NOT_STRING_LIST(nm, propname) \
243 ERROR(nm, check_is_string_list, (propname))
244
245static void check_is_cell(struct check *c, struct dt_info *dti,
246 struct node *node)
247{
248 struct property *prop;
249 char *propname = c->data;
250
251 prop = get_property(node, propname);
252 if (!prop)
253 return; /* Not present, assumed ok */
254
255 if (prop->val.len != sizeof(cell_t))
256 FAIL_PROP(c, dti, node, prop, "property is not a single cell");
257}
258#define WARNING_IF_NOT_CELL(nm, propname) \
259 WARNING(nm, check_is_cell, (propname))
260#define ERROR_IF_NOT_CELL(nm, propname) \
261 ERROR(nm, check_is_cell, (propname))
262
263/*
264 * Structural check functions
265 */
266
267static void check_duplicate_node_names(struct check *c, struct dt_info *dti,
268 struct node *node)
269{
270 struct node *child, *child2;
271
272 for_each_child(node, child)
273 for (child2 = child->next_sibling;
274 child2;
275 child2 = child2->next_sibling)
276 if (streq(child->name, child2->name))
277 FAIL(c, dti, child2, "Duplicate node name");
278}
279ERROR(duplicate_node_names, check_duplicate_node_names, NULL);
280
281static void check_duplicate_property_names(struct check *c, struct dt_info *dti,
282 struct node *node)
283{
284 struct property *prop, *prop2;
285
286 for_each_property(node, prop) {
287 for (prop2 = prop->next; prop2; prop2 = prop2->next) {
288 if (prop2->deleted)
289 continue;
290 if (streq(prop->name, prop2->name))
291 FAIL_PROP(c, dti, node, prop, "Duplicate property name");
292 }
293 }
294}
295ERROR(duplicate_property_names, check_duplicate_property_names, NULL);
296
297#define LOWERCASE "abcdefghijklmnopqrstuvwxyz"
298#define UPPERCASE "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
299#define DIGITS "0123456789"
300#define PROPNODECHARS LOWERCASE UPPERCASE DIGITS ",._+*#?-"
301#define PROPNODECHARSSTRICT LOWERCASE UPPERCASE DIGITS ",-"
302
303static void check_node_name_chars(struct check *c, struct dt_info *dti,
304 struct node *node)
305{
306 int n = strspn(node->name, c->data);
307
308 if (n < strlen(node->name))
309 FAIL(c, dti, node, "Bad character '%c' in node name",
310 node->name[n]);
311}
312ERROR(node_name_chars, check_node_name_chars, PROPNODECHARS "@");
313
314static void check_node_name_chars_strict(struct check *c, struct dt_info *dti,
315 struct node *node)
316{
317 int n = strspn(node->name, c->data);
318
319 if (n < node->basenamelen)
320 FAIL(c, dti, node, "Character '%c' not recommended in node name",
321 node->name[n]);
322}
323CHECK(node_name_chars_strict, check_node_name_chars_strict, PROPNODECHARSSTRICT);
324
325static void check_node_name_format(struct check *c, struct dt_info *dti,
326 struct node *node)
327{
328 if (strchr(get_unitname(node), '@'))
329 FAIL(c, dti, node, "multiple '@' characters in node name");
330}
331ERROR(node_name_format, check_node_name_format, NULL, &node_name_chars);
332
333static void check_unit_address_vs_reg(struct check *c, struct dt_info *dti,
334 struct node *node)
335{
336 const char *unitname = get_unitname(node);
337 struct property *prop = get_property(node, "reg");
338
339 if (get_subnode(node, "__overlay__")) {
340 /* HACK: Overlay fragments are a special case */
341 return;
342 }
343
344 if (!prop) {
345 prop = get_property(node, "ranges");
346 if (prop && !prop->val.len)
347 prop = NULL;
348 }
349
350 if (prop) {
351 if (!unitname[0])
352 FAIL(c, dti, node, "node has a reg or ranges property, but no unit name");
353 } else {
354 if (unitname[0])
355 FAIL(c, dti, node, "node has a unit name, but no reg or ranges property");
356 }
357}
358WARNING(unit_address_vs_reg, check_unit_address_vs_reg, NULL);
359
360static void check_property_name_chars(struct check *c, struct dt_info *dti,
361 struct node *node)
362{
363 struct property *prop;
364
365 for_each_property(node, prop) {
366 int n = strspn(prop->name, c->data);
367
368 if (n < strlen(prop->name))
369 FAIL_PROP(c, dti, node, prop, "Bad character '%c' in property name",
370 prop->name[n]);
371 }
372}
373ERROR(property_name_chars, check_property_name_chars, PROPNODECHARS);
374
375static void check_property_name_chars_strict(struct check *c,
376 struct dt_info *dti,
377 struct node *node)
378{
379 struct property *prop;
380
381 for_each_property(node, prop) {
382 const char *name = prop->name;
383 int n = strspn(name, c->data);
384
385 if (n == strlen(prop->name))
386 continue;
387
388 /* Certain names are whitelisted */
389 if (streq(name, "device_type"))
390 continue;
391
392 /*
393 * # is only allowed at the beginning of property names not counting
394 * the vendor prefix.
395 */
396 if (name[n] == '#' && ((n == 0) || (name[n-1] == ','))) {
397 name += n + 1;
398 n = strspn(name, c->data);
399 }
400 if (n < strlen(name))
401 FAIL_PROP(c, dti, node, prop, "Character '%c' not recommended in property name",
402 name[n]);
403 }
404}
405CHECK(property_name_chars_strict, check_property_name_chars_strict, PROPNODECHARSSTRICT);
406
407#define DESCLABEL_FMT "%s%s%s%s%s"
408#define DESCLABEL_ARGS(node,prop,mark) \
409 ((mark) ? "value of " : ""), \
410 ((prop) ? "'" : ""), \
411 ((prop) ? (prop)->name : ""), \
412 ((prop) ? "' in " : ""), (node)->fullpath
413
414static void check_duplicate_label(struct check *c, struct dt_info *dti,
415 const char *label, struct node *node,
416 struct property *prop, struct marker *mark)
417{
418 struct node *dt = dti->dt;
419 struct node *othernode = NULL;
420 struct property *otherprop = NULL;
421 struct marker *othermark = NULL;
422
423 othernode = get_node_by_label(dt, label);
424
425 if (!othernode)
426 otherprop = get_property_by_label(dt, label, &othernode);
427 if (!othernode)
428 othermark = get_marker_label(dt, label, &othernode,
429 &otherprop);
430
431 if (!othernode)
432 return;
433
434 if ((othernode != node) || (otherprop != prop) || (othermark != mark))
435 FAIL(c, dti, node, "Duplicate label '%s' on " DESCLABEL_FMT
436 " and " DESCLABEL_FMT,
437 label, DESCLABEL_ARGS(node, prop, mark),
438 DESCLABEL_ARGS(othernode, otherprop, othermark));
439}
440
441static void check_duplicate_label_node(struct check *c, struct dt_info *dti,
442 struct node *node)
443{
444 struct label *l;
445 struct property *prop;
446
447 for_each_label(node->labels, l)
448 check_duplicate_label(c, dti, l->label, node, NULL, NULL);
449
450 for_each_property(node, prop) {
451 struct marker *m = prop->val.markers;
452
453 for_each_label(prop->labels, l)
454 check_duplicate_label(c, dti, l->label, node, prop, NULL);
455
456 for_each_marker_of_type(m, LABEL)
457 check_duplicate_label(c, dti, m->ref, node, prop, m);
458 }
459}
460ERROR(duplicate_label, check_duplicate_label_node, NULL);
461
462static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
463 struct node *node, const char *propname)
464{
465 struct node *root = dti->dt;
466 struct property *prop;
467 struct marker *m;
468 cell_t phandle;
469
470 prop = get_property(node, propname);
471 if (!prop)
472 return 0;
473
474 if (prop->val.len != sizeof(cell_t)) {
475 FAIL_PROP(c, dti, node, prop, "bad length (%d) %s property",
476 prop->val.len, prop->name);
477 return 0;
478 }
479
480 m = prop->val.markers;
481 for_each_marker_of_type(m, REF_PHANDLE) {
482 assert(m->offset == 0);
483 if (node != get_node_by_ref(root, m->ref))
484 /* "Set this node's phandle equal to some
485 * other node's phandle". That's nonsensical
486 * by construction. */ {
487 FAIL(c, dti, node, "%s is a reference to another node",
488 prop->name);
489 }
490 /* But setting this node's phandle equal to its own
491 * phandle is allowed - that means allocate a unique
492 * phandle for this node, even if it's not otherwise
493 * referenced. The value will be filled in later, so
494 * we treat it as having no phandle data for now. */
495 return 0;
496 }
497
498 phandle = propval_cell(prop);
499
500 if ((phandle == 0) || (phandle == -1)) {
501 FAIL_PROP(c, dti, node, prop, "bad value (0x%x) in %s property",
502 phandle, prop->name);
503 return 0;
504 }
505
506 return phandle;
507}
508
509static void check_explicit_phandles(struct check *c, struct dt_info *dti,
510 struct node *node)
511{
512 struct node *root = dti->dt;
513 struct node *other;
514 cell_t phandle, linux_phandle;
515
516 /* Nothing should have assigned phandles yet */
517 assert(!node->phandle);
518
519 phandle = check_phandle_prop(c, dti, node, "phandle");
520
521 linux_phandle = check_phandle_prop(c, dti, node, "linux,phandle");
522
523 if (!phandle && !linux_phandle)
524 /* No valid phandles; nothing further to check */
525 return;
526
527 if (linux_phandle && phandle && (phandle != linux_phandle))
528 FAIL(c, dti, node, "mismatching 'phandle' and 'linux,phandle'"
529 " properties");
530
531 if (linux_phandle && !phandle)
532 phandle = linux_phandle;
533
534 other = get_node_by_phandle(root, phandle);
535 if (other && (other != node)) {
536 FAIL(c, dti, node, "duplicated phandle 0x%x (seen before at %s)",
537 phandle, other->fullpath);
538 return;
539 }
540
541 node->phandle = phandle;
542}
543ERROR(explicit_phandles, check_explicit_phandles, NULL);
544
545static void check_name_properties(struct check *c, struct dt_info *dti,
546 struct node *node)
547{
548 struct property **pp, *prop = NULL;
549
550 for (pp = &node->proplist; *pp; pp = &((*pp)->next))
551 if (streq((*pp)->name, "name")) {
552 prop = *pp;
553 break;
554 }
555
556 if (!prop)
557 return; /* No name property, that's fine */
558
559 if ((prop->val.len != node->basenamelen+1)
560 || (memcmp(prop->val.val, node->name, node->basenamelen) != 0)) {
561 FAIL(c, dti, node, "\"name\" property is incorrect (\"%s\" instead"
562 " of base node name)", prop->val.val);
563 } else {
564 /* The name property is correct, and therefore redundant.
565 * Delete it */
566 *pp = prop->next;
567 free(prop->name);
568 data_free(prop->val);
569 free(prop);
570 }
571}
572ERROR_IF_NOT_STRING(name_is_string, "name");
573ERROR(name_properties, check_name_properties, NULL, &name_is_string);
574
575/*
576 * Reference fixup functions
577 */
578
579static void fixup_phandle_references(struct check *c, struct dt_info *dti,
580 struct node *node)
581{
582 struct node *dt = dti->dt;
583 struct property *prop;
584
585 for_each_property(node, prop) {
586 struct marker *m = prop->val.markers;
587 struct node *refnode;
588 cell_t phandle;
589
590 for_each_marker_of_type(m, REF_PHANDLE) {
591 assert(m->offset + sizeof(cell_t) <= prop->val.len);
592
593 refnode = get_node_by_ref(dt, m->ref);
594 if (! refnode) {
595 if (!(dti->dtsflags & DTSF_PLUGIN))
596 FAIL(c, dti, node, "Reference to non-existent node or "
597 "label \"%s\"\n", m->ref);
598 else /* mark the entry as unresolved */
599 *((fdt32_t *)(prop->val.val + m->offset)) =
600 cpu_to_fdt32(0xffffffff);
601 continue;
602 }
603
604 phandle = get_node_phandle(dt, refnode);
605 *((fdt32_t *)(prop->val.val + m->offset)) = cpu_to_fdt32(phandle);
606
607 reference_node(refnode);
608 }
609 }
610}
611ERROR(phandle_references, fixup_phandle_references, NULL,
612 &duplicate_node_names, &explicit_phandles);
613
614static void fixup_path_references(struct check *c, struct dt_info *dti,
615 struct node *node)
616{
617 struct node *dt = dti->dt;
618 struct property *prop;
619
620 for_each_property(node, prop) {
621 struct marker *m = prop->val.markers;
622 struct node *refnode;
623 char *path;
624
625 for_each_marker_of_type(m, REF_PATH) {
626 assert(m->offset <= prop->val.len);
627
628 refnode = get_node_by_ref(dt, m->ref);
629 if (!refnode) {
630 FAIL(c, dti, node, "Reference to non-existent node or label \"%s\"\n",
631 m->ref);
632 continue;
633 }
634
635 path = refnode->fullpath;
636 prop->val = data_insert_at_marker(prop->val, m, path,
637 strlen(path) + 1);
638
639 reference_node(refnode);
640 }
641 }
642}
643ERROR(path_references, fixup_path_references, NULL, &duplicate_node_names);
644
645static void fixup_omit_unused_nodes(struct check *c, struct dt_info *dti,
646 struct node *node)
647{
648 if (generate_symbols && node->labels)
649 return;
650 if (node->omit_if_unused && !node->is_referenced)
651 delete_node(node);
652}
653ERROR(omit_unused_nodes, fixup_omit_unused_nodes, NULL, &phandle_references, &path_references);
654
655/*
656 * Semantic checks
657 */
658WARNING_IF_NOT_CELL(address_cells_is_cell, "#address-cells");
659WARNING_IF_NOT_CELL(size_cells_is_cell, "#size-cells");
660WARNING_IF_NOT_CELL(interrupt_cells_is_cell, "#interrupt-cells");
661
662WARNING_IF_NOT_STRING(device_type_is_string, "device_type");
663WARNING_IF_NOT_STRING(model_is_string, "model");
664WARNING_IF_NOT_STRING(status_is_string, "status");
665WARNING_IF_NOT_STRING(label_is_string, "label");
666
667WARNING_IF_NOT_STRING_LIST(compatible_is_string_list, "compatible");
668
669static void check_names_is_string_list(struct check *c, struct dt_info *dti,
670 struct node *node)
671{
672 struct property *prop;
673
674 for_each_property(node, prop) {
675 const char *s = strrchr(prop->name, '-');
676 if (!s || !streq(s, "-names"))
677 continue;
678
679 c->data = prop->name;
680 check_is_string_list(c, dti, node);
681 }
682}
683WARNING(names_is_string_list, check_names_is_string_list, NULL);
684
685static void check_alias_paths(struct check *c, struct dt_info *dti,
686 struct node *node)
687{
688 struct property *prop;
689
690 if (!streq(node->name, "aliases"))
691 return;
692
693 for_each_property(node, prop) {
694 if (streq(prop->name, "phandle")
695 || streq(prop->name, "linux,phandle")) {
696 continue;
697 }
698
699 if (!prop->val.val || !get_node_by_path(dti->dt, prop->val.val)) {
700 FAIL_PROP(c, dti, node, prop, "aliases property is not a valid node (%s)",
701 prop->val.val);
702 continue;
703 }
704 if (strspn(prop->name, LOWERCASE DIGITS "-") != strlen(prop->name))
705 FAIL(c, dti, node, "aliases property name must include only lowercase and '-'");
706 }
707}
708WARNING(alias_paths, check_alias_paths, NULL);
709
710static void fixup_addr_size_cells(struct check *c, struct dt_info *dti,
711 struct node *node)
712{
713 struct property *prop;
714
715 node->addr_cells = -1;
716 node->size_cells = -1;
717
718 prop = get_property(node, "#address-cells");
719 if (prop)
720 node->addr_cells = propval_cell(prop);
721
722 prop = get_property(node, "#size-cells");
723 if (prop)
724 node->size_cells = propval_cell(prop);
725}
726WARNING(addr_size_cells, fixup_addr_size_cells, NULL,
727 &address_cells_is_cell, &size_cells_is_cell);
728
729#define node_addr_cells(n) \
730 (((n)->addr_cells == -1) ? 2 : (n)->addr_cells)
731#define node_size_cells(n) \
732 (((n)->size_cells == -1) ? 1 : (n)->size_cells)
733
734static void check_reg_format(struct check *c, struct dt_info *dti,
735 struct node *node)
736{
737 struct property *prop;
738 int addr_cells, size_cells, entrylen;
739
740 prop = get_property(node, "reg");
741 if (!prop)
742 return; /* No "reg", that's fine */
743
744 if (!node->parent) {
745 FAIL(c, dti, node, "Root node has a \"reg\" property");
746 return;
747 }
748
749 if (prop->val.len == 0)
750 FAIL_PROP(c, dti, node, prop, "property is empty");
751
752 addr_cells = node_addr_cells(node->parent);
753 size_cells = node_size_cells(node->parent);
754 entrylen = (addr_cells + size_cells) * sizeof(cell_t);
755
756 if (!entrylen || (prop->val.len % entrylen) != 0)
757 FAIL_PROP(c, dti, node, prop, "property has invalid length (%d bytes) "
758 "(#address-cells == %d, #size-cells == %d)",
759 prop->val.len, addr_cells, size_cells);
760}
761WARNING(reg_format, check_reg_format, NULL, &addr_size_cells);
762
763static void check_ranges_format(struct check *c, struct dt_info *dti,
764 struct node *node)
765{
766 struct property *prop;
767 int c_addr_cells, p_addr_cells, c_size_cells, p_size_cells, entrylen;
768 const char *ranges = c->data;
769
770 prop = get_property(node, ranges);
771 if (!prop)
772 return;
773
774 if (!node->parent) {
775 FAIL_PROP(c, dti, node, prop, "Root node has a \"%s\" property",
776 ranges);
777 return;
778 }
779
780 p_addr_cells = node_addr_cells(node->parent);
781 p_size_cells = node_size_cells(node->parent);
782 c_addr_cells = node_addr_cells(node);
783 c_size_cells = node_size_cells(node);
784 entrylen = (p_addr_cells + c_addr_cells + c_size_cells) * sizeof(cell_t);
785
786 if (prop->val.len == 0) {
787 if (p_addr_cells != c_addr_cells)
788 FAIL_PROP(c, dti, node, prop, "empty \"%s\" property but its "
789 "#address-cells (%d) differs from %s (%d)",
790 ranges, c_addr_cells, node->parent->fullpath,
791 p_addr_cells);
792 if (p_size_cells != c_size_cells)
793 FAIL_PROP(c, dti, node, prop, "empty \"%s\" property but its "
794 "#size-cells (%d) differs from %s (%d)",
795 ranges, c_size_cells, node->parent->fullpath,
796 p_size_cells);
797 } else if ((prop->val.len % entrylen) != 0) {
798 FAIL_PROP(c, dti, node, prop, "\"%s\" property has invalid length (%d bytes) "
799 "(parent #address-cells == %d, child #address-cells == %d, "
800 "#size-cells == %d)", ranges, prop->val.len,
801 p_addr_cells, c_addr_cells, c_size_cells);
802 }
803}
804WARNING(ranges_format, check_ranges_format, "ranges", &addr_size_cells);
805WARNING(dma_ranges_format, check_ranges_format, "dma-ranges", &addr_size_cells);
806
807static const struct bus_type pci_bus = {
808 .name = "PCI",
809};
810
811static void check_pci_bridge(struct check *c, struct dt_info *dti, struct node *node)
812{
813 struct property *prop;
814 cell_t *cells;
815
816 prop = get_property(node, "device_type");
817 if (!prop || !streq(prop->val.val, "pci"))
818 return;
819
820 node->bus = &pci_bus;
821
822 if (!strprefixeq(node->name, node->basenamelen, "pci") &&
823 !strprefixeq(node->name, node->basenamelen, "pcie"))
824 FAIL(c, dti, node, "node name is not \"pci\" or \"pcie\"");
825
826 prop = get_property(node, "ranges");
827 if (!prop)
828 FAIL(c, dti, node, "missing ranges for PCI bridge (or not a bridge)");
829
830 if (node_addr_cells(node) != 3)
831 FAIL(c, dti, node, "incorrect #address-cells for PCI bridge");
832 if (node_size_cells(node) != 2)
833 FAIL(c, dti, node, "incorrect #size-cells for PCI bridge");
834
835 prop = get_property(node, "bus-range");
836 if (!prop)
837 return;
838
839 if (prop->val.len != (sizeof(cell_t) * 2)) {
840 FAIL_PROP(c, dti, node, prop, "value must be 2 cells");
841 return;
842 }
843 cells = (cell_t *)prop->val.val;
844 if (fdt32_to_cpu(cells[0]) > fdt32_to_cpu(cells[1]))
845 FAIL_PROP(c, dti, node, prop, "1st cell must be less than or equal to 2nd cell");
846 if (fdt32_to_cpu(cells[1]) > 0xff)
847 FAIL_PROP(c, dti, node, prop, "maximum bus number must be less than 256");
848}
849WARNING(pci_bridge, check_pci_bridge, NULL,
850 &device_type_is_string, &addr_size_cells);
851
852static void check_pci_device_bus_num(struct check *c, struct dt_info *dti, struct node *node)
853{
854 struct property *prop;
855 unsigned int bus_num, min_bus, max_bus;
856 cell_t *cells;
857
858 if (!node->parent || (node->parent->bus != &pci_bus))
859 return;
860
861 prop = get_property(node, "reg");
862 if (!prop)
863 return;
864
865 cells = (cell_t *)prop->val.val;
866 bus_num = (fdt32_to_cpu(cells[0]) & 0x00ff0000) >> 16;
867
868 prop = get_property(node->parent, "bus-range");
869 if (!prop) {
870 min_bus = max_bus = 0;
871 } else {
872 cells = (cell_t *)prop->val.val;
873 min_bus = fdt32_to_cpu(cells[0]);
874 max_bus = fdt32_to_cpu(cells[0]);
875 }
876 if ((bus_num < min_bus) || (bus_num > max_bus))
877 FAIL_PROP(c, dti, node, prop, "PCI bus number %d out of range, expected (%d - %d)",
878 bus_num, min_bus, max_bus);
879}
880WARNING(pci_device_bus_num, check_pci_device_bus_num, NULL, ®_format, &pci_bridge);
881
882static void check_pci_device_reg(struct check *c, struct dt_info *dti, struct node *node)
883{
884 struct property *prop;
885 const char *unitname = get_unitname(node);
886 char unit_addr[5];
887 unsigned int dev, func, reg;
888 cell_t *cells;
889
890 if (!node->parent || (node->parent->bus != &pci_bus))
891 return;
892
893 prop = get_property(node, "reg");
894 if (!prop) {
895 FAIL(c, dti, node, "missing PCI reg property");
896 return;
897 }
898
899 cells = (cell_t *)prop->val.val;
900 if (cells[1] || cells[2])
901 FAIL_PROP(c, dti, node, prop, "PCI reg config space address cells 2 and 3 must be 0");
902
903 reg = fdt32_to_cpu(cells[0]);
904 dev = (reg & 0xf800) >> 11;
905 func = (reg & 0x700) >> 8;
906
907 if (reg & 0xff000000)
908 FAIL_PROP(c, dti, node, prop, "PCI reg address is not configuration space");
909 if (reg & 0x000000ff)
910 FAIL_PROP(c, dti, node, prop, "PCI reg config space address register number must be 0");
911
912 if (func == 0) {
913 snprintf(unit_addr, sizeof(unit_addr), "%x", dev);
914 if (streq(unitname, unit_addr))
915 return;
916 }
917
918 snprintf(unit_addr, sizeof(unit_addr), "%x,%x", dev, func);
919 if (streq(unitname, unit_addr))
920 return;
921
922 FAIL(c, dti, node, "PCI unit address format error, expected \"%s\"",
923 unit_addr);
924}
925WARNING(pci_device_reg, check_pci_device_reg, NULL, ®_format, &pci_bridge);
926
927static const struct bus_type simple_bus = {
928 .name = "simple-bus",
929};
930
931static bool node_is_compatible(struct node *node, const char *compat)
932{
933 struct property *prop;
934 const char *str, *end;
935
936 prop = get_property(node, "compatible");
937 if (!prop)
938 return false;
939
940 for (str = prop->val.val, end = str + prop->val.len; str < end;
941 str += strnlen(str, end - str) + 1) {
942 if (streq(str, compat))
943 return true;
944 }
945 return false;
946}
947
948static void check_simple_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
949{
950 if (node_is_compatible(node, "simple-bus"))
951 node->bus = &simple_bus;
952}
953WARNING(simple_bus_bridge, check_simple_bus_bridge, NULL,
954 &addr_size_cells, &compatible_is_string_list);
955
956static void check_simple_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
957{
958 struct property *prop;
959 const char *unitname = get_unitname(node);
960 char unit_addr[17];
961 unsigned int size;
962 uint64_t reg = 0;
963 cell_t *cells = NULL;
964
965 if (!node->parent || (node->parent->bus != &simple_bus))
966 return;
967
968 prop = get_property(node, "reg");
969 if (prop)
970 cells = (cell_t *)prop->val.val;
971 else {
972 prop = get_property(node, "ranges");
973 if (prop && prop->val.len)
974 /* skip of child address */
975 cells = ((cell_t *)prop->val.val) + node_addr_cells(node);
976 }
977
978 if (!cells) {
979 if (node->parent->parent && !(node->bus == &simple_bus))
980 FAIL(c, dti, node, "missing or empty reg/ranges property");
981 return;
982 }
983
984 size = node_addr_cells(node->parent);
985 while (size--)
986 reg = (reg << 32) | fdt32_to_cpu(*(cells++));
987
988 snprintf(unit_addr, sizeof(unit_addr), "%"PRIx64, reg);
989 if (!streq(unitname, unit_addr))
990 FAIL(c, dti, node, "simple-bus unit address format error, expected \"%s\"",
991 unit_addr);
992}
993WARNING(simple_bus_reg, check_simple_bus_reg, NULL, ®_format, &simple_bus_bridge);
994
995static const struct bus_type i2c_bus = {
996 .name = "i2c-bus",
997};
998
999static void check_i2c_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
1000{
1001 if (strprefixeq(node->name, node->basenamelen, "i2c-bus") ||
1002 strprefixeq(node->name, node->basenamelen, "i2c-arb")) {
1003 node->bus = &i2c_bus;
1004 } else if (strprefixeq(node->name, node->basenamelen, "i2c")) {
1005 struct node *child;
1006 for_each_child(node, child) {
1007 if (strprefixeq(child->name, node->basenamelen, "i2c-bus"))
1008 return;
1009 }
1010 node->bus = &i2c_bus;
1011 } else
1012 return;
1013
1014 if (!node->children)
1015 return;
1016
1017 if (node_addr_cells(node) != 1)
1018 FAIL(c, dti, node, "incorrect #address-cells for I2C bus");
1019 if (node_size_cells(node) != 0)
1020 FAIL(c, dti, node, "incorrect #size-cells for I2C bus");
1021
1022}
1023WARNING(i2c_bus_bridge, check_i2c_bus_bridge, NULL, &addr_size_cells);
1024
1025#define I2C_OWN_SLAVE_ADDRESS (1U << 30)
1026#define I2C_TEN_BIT_ADDRESS (1U << 31)
1027
1028static void check_i2c_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
1029{
1030 struct property *prop;
1031 const char *unitname = get_unitname(node);
1032 char unit_addr[17];
1033 uint32_t reg = 0;
1034 int len;
1035 cell_t *cells = NULL;
1036
1037 if (!node->parent || (node->parent->bus != &i2c_bus))
1038 return;
1039
1040 prop = get_property(node, "reg");
1041 if (prop)
1042 cells = (cell_t *)prop->val.val;
1043
1044 if (!cells) {
1045 FAIL(c, dti, node, "missing or empty reg property");
1046 return;
1047 }
1048
1049 reg = fdt32_to_cpu(*cells);
1050 /* Ignore I2C_OWN_SLAVE_ADDRESS */
1051 reg &= ~I2C_OWN_SLAVE_ADDRESS;
1052 snprintf(unit_addr, sizeof(unit_addr), "%x", reg);
1053 if (!streq(unitname, unit_addr))
1054 FAIL(c, dti, node, "I2C bus unit address format error, expected \"%s\"",
1055 unit_addr);
1056
1057 for (len = prop->val.len; len > 0; len -= 4) {
1058 reg = fdt32_to_cpu(*(cells++));
1059 /* Ignore I2C_OWN_SLAVE_ADDRESS */
1060 reg &= ~I2C_OWN_SLAVE_ADDRESS;
1061
1062 if ((reg & I2C_TEN_BIT_ADDRESS) && ((reg & ~I2C_TEN_BIT_ADDRESS) > 0x3ff))
1063 FAIL_PROP(c, dti, node, prop, "I2C address must be less than 10-bits, got \"0x%x\"",
1064 reg);
1065 else if (reg > 0x7f)
1066 FAIL_PROP(c, dti, node, prop, "I2C address must be less than 7-bits, got \"0x%x\". Set I2C_TEN_BIT_ADDRESS for 10 bit addresses or fix the property",
1067 reg);
1068 }
1069}
1070WARNING(i2c_bus_reg, check_i2c_bus_reg, NULL, ®_format, &i2c_bus_bridge);
1071
1072static const struct bus_type spi_bus = {
1073 .name = "spi-bus",
1074};
1075
1076static void check_spi_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
1077{
1078 int spi_addr_cells = 1;
1079
1080 if (strprefixeq(node->name, node->basenamelen, "spi")) {
1081 node->bus = &spi_bus;
1082 } else {
1083 /* Try to detect SPI buses which don't have proper node name */
1084 struct node *child;
1085
1086 if (node_addr_cells(node) != 1 || node_size_cells(node) != 0)
1087 return;
1088
1089 for_each_child(node, child) {
1090 struct property *prop;
1091 for_each_property(child, prop) {
1092 if (strprefixeq(prop->name, 4, "spi-")) {
1093 node->bus = &spi_bus;
1094 break;
1095 }
1096 }
1097 if (node->bus == &spi_bus)
1098 break;
1099 }
1100
1101 if (node->bus == &spi_bus && get_property(node, "reg"))
1102 FAIL(c, dti, node, "node name for SPI buses should be 'spi'");
1103 }
1104 if (node->bus != &spi_bus || !node->children)
1105 return;
1106
1107 if (get_property(node, "spi-slave"))
1108 spi_addr_cells = 0;
1109 if (node_addr_cells(node) != spi_addr_cells)
1110 FAIL(c, dti, node, "incorrect #address-cells for SPI bus");
1111 if (node_size_cells(node) != 0)
1112 FAIL(c, dti, node, "incorrect #size-cells for SPI bus");
1113
1114}
1115WARNING(spi_bus_bridge, check_spi_bus_bridge, NULL, &addr_size_cells);
1116
1117static void check_spi_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
1118{
1119 struct property *prop;
1120 const char *unitname = get_unitname(node);
1121 char unit_addr[9];
1122 uint32_t reg = 0;
1123 cell_t *cells = NULL;
1124
1125 if (!node->parent || (node->parent->bus != &spi_bus))
1126 return;
1127
1128 if (get_property(node->parent, "spi-slave"))
1129 return;
1130
1131 prop = get_property(node, "reg");
1132 if (prop)
1133 cells = (cell_t *)prop->val.val;
1134
1135 if (!cells) {
1136 FAIL(c, dti, node, "missing or empty reg property");
1137 return;
1138 }
1139
1140 reg = fdt32_to_cpu(*cells);
1141 snprintf(unit_addr, sizeof(unit_addr), "%x", reg);
1142 if (!streq(unitname, unit_addr))
1143 FAIL(c, dti, node, "SPI bus unit address format error, expected \"%s\"",
1144 unit_addr);
1145}
1146WARNING(spi_bus_reg, check_spi_bus_reg, NULL, ®_format, &spi_bus_bridge);
1147
1148static void check_unit_address_format(struct check *c, struct dt_info *dti,
1149 struct node *node)
1150{
1151 const char *unitname = get_unitname(node);
1152
1153 if (node->parent && node->parent->bus)
1154 return;
1155
1156 if (!unitname[0])
1157 return;
1158
1159 if (!strncmp(unitname, "0x", 2)) {
1160 FAIL(c, dti, node, "unit name should not have leading \"0x\"");
1161 /* skip over 0x for next test */
1162 unitname += 2;
1163 }
1164 if (unitname[0] == '0' && isxdigit(unitname[1]))
1165 FAIL(c, dti, node, "unit name should not have leading 0s");
1166}
1167WARNING(unit_address_format, check_unit_address_format, NULL,
1168 &node_name_format, &pci_bridge, &simple_bus_bridge);
1169
1170/*
1171 * Style checks
1172 */
1173static void check_avoid_default_addr_size(struct check *c, struct dt_info *dti,
1174 struct node *node)
1175{
1176 struct property *reg, *ranges;
1177
1178 if (!node->parent)
1179 return; /* Ignore root node */
1180
1181 reg = get_property(node, "reg");
1182 ranges = get_property(node, "ranges");
1183
1184 if (!reg && !ranges)
1185 return;
1186
1187 if (node->parent->addr_cells == -1)
1188 FAIL(c, dti, node, "Relying on default #address-cells value");
1189
1190 if (node->parent->size_cells == -1)
1191 FAIL(c, dti, node, "Relying on default #size-cells value");
1192}
1193WARNING(avoid_default_addr_size, check_avoid_default_addr_size, NULL,
1194 &addr_size_cells);
1195
1196static void check_avoid_unnecessary_addr_size(struct check *c, struct dt_info *dti,
1197 struct node *node)
1198{
1199 struct property *prop;
1200 struct node *child;
1201 bool has_reg = false;
1202
1203 if (!node->parent || node->addr_cells < 0 || node->size_cells < 0)
1204 return;
1205
1206 if (get_property(node, "ranges") || !node->children)
1207 return;
1208
1209 for_each_child(node, child) {
1210 prop = get_property(child, "reg");
1211 if (prop)
1212 has_reg = true;
1213 }
1214
1215 if (!has_reg)
1216 FAIL(c, dti, node, "unnecessary #address-cells/#size-cells without \"ranges\" or child \"reg\" property");
1217}
1218WARNING(avoid_unnecessary_addr_size, check_avoid_unnecessary_addr_size, NULL, &avoid_default_addr_size);
1219
1220static bool node_is_disabled(struct node *node)
1221{
1222 struct property *prop;
1223
1224 prop = get_property(node, "status");
1225 if (prop) {
1226 char *str = prop->val.val;
1227 if (streq("disabled", str))
1228 return true;
1229 }
1230
1231 return false;
1232}
1233
1234static void check_unique_unit_address_common(struct check *c,
1235 struct dt_info *dti,
1236 struct node *node,
1237 bool disable_check)
1238{
1239 struct node *childa;
1240
1241 if (node->addr_cells < 0 || node->size_cells < 0)
1242 return;
1243
1244 if (!node->children)
1245 return;
1246
1247 for_each_child(node, childa) {
1248 struct node *childb;
1249 const char *addr_a = get_unitname(childa);
1250
1251 if (!strlen(addr_a))
1252 continue;
1253
1254 if (disable_check && node_is_disabled(childa))
1255 continue;
1256
1257 for_each_child(node, childb) {
1258 const char *addr_b = get_unitname(childb);
1259 if (childa == childb)
1260 break;
1261
1262 if (disable_check && node_is_disabled(childb))
1263 continue;
1264
1265 if (streq(addr_a, addr_b))
1266 FAIL(c, dti, childb, "duplicate unit-address (also used in node %s)", childa->fullpath);
1267 }
1268 }
1269}
1270
1271static void check_unique_unit_address(struct check *c, struct dt_info *dti,
1272 struct node *node)
1273{
1274 check_unique_unit_address_common(c, dti, node, false);
1275}
1276WARNING(unique_unit_address, check_unique_unit_address, NULL, &avoid_default_addr_size);
1277
1278static void check_unique_unit_address_if_enabled(struct check *c, struct dt_info *dti,
1279 struct node *node)
1280{
1281 check_unique_unit_address_common(c, dti, node, true);
1282}
1283CHECK_ENTRY(unique_unit_address_if_enabled, check_unique_unit_address_if_enabled,
1284 NULL, false, false, &avoid_default_addr_size);
1285
1286static void check_obsolete_chosen_interrupt_controller(struct check *c,
1287 struct dt_info *dti,
1288 struct node *node)
1289{
1290 struct node *dt = dti->dt;
1291 struct node *chosen;
1292 struct property *prop;
1293
1294 if (node != dt)
1295 return;
1296
1297
1298 chosen = get_node_by_path(dt, "/chosen");
1299 if (!chosen)
1300 return;
1301
1302 prop = get_property(chosen, "interrupt-controller");
1303 if (prop)
1304 FAIL_PROP(c, dti, node, prop,
1305 "/chosen has obsolete \"interrupt-controller\" property");
1306}
1307WARNING(obsolete_chosen_interrupt_controller,
1308 check_obsolete_chosen_interrupt_controller, NULL);
1309
1310static void check_chosen_node_is_root(struct check *c, struct dt_info *dti,
1311 struct node *node)
1312{
1313 if (!streq(node->name, "chosen"))
1314 return;
1315
1316 if (node->parent != dti->dt)
1317 FAIL(c, dti, node, "chosen node must be at root node");
1318}
1319WARNING(chosen_node_is_root, check_chosen_node_is_root, NULL);
1320
1321static void check_chosen_node_bootargs(struct check *c, struct dt_info *dti,
1322 struct node *node)
1323{
1324 struct property *prop;
1325
1326 if (!streq(node->name, "chosen"))
1327 return;
1328
1329 prop = get_property(node, "bootargs");
1330 if (!prop)
1331 return;
1332
1333 c->data = prop->name;
1334 check_is_string(c, dti, node);
1335}
1336WARNING(chosen_node_bootargs, check_chosen_node_bootargs, NULL);
1337
1338static void check_chosen_node_stdout_path(struct check *c, struct dt_info *dti,
1339 struct node *node)
1340{
1341 struct property *prop;
1342
1343 if (!streq(node->name, "chosen"))
1344 return;
1345
1346 prop = get_property(node, "stdout-path");
1347 if (!prop) {
1348 prop = get_property(node, "linux,stdout-path");
1349 if (!prop)
1350 return;
1351 FAIL_PROP(c, dti, node, prop, "Use 'stdout-path' instead");
1352 }
1353
1354 c->data = prop->name;
1355 check_is_string(c, dti, node);
1356}
1357WARNING(chosen_node_stdout_path, check_chosen_node_stdout_path, NULL);
1358
1359struct provider {
1360 const char *prop_name;
1361 const char *cell_name;
1362 bool optional;
1363};
1364
1365static void check_property_phandle_args(struct check *c,
1366 struct dt_info *dti,
1367 struct node *node,
1368 struct property *prop,
1369 const struct provider *provider)
1370{
1371 struct node *root = dti->dt;
1372 int cell, cellsize = 0;
1373
1374 if (prop->val.len % sizeof(cell_t)) {
1375 FAIL_PROP(c, dti, node, prop,
1376 "property size (%d) is invalid, expected multiple of %zu",
1377 prop->val.len, sizeof(cell_t));
1378 return;
1379 }
1380
1381 for (cell = 0; cell < prop->val.len / sizeof(cell_t); cell += cellsize + 1) {
1382 struct node *provider_node;
1383 struct property *cellprop;
1384 int phandle;
1385
1386 phandle = propval_cell_n(prop, cell);
1387 /*
1388 * Some bindings use a cell value 0 or -1 to skip over optional
1389 * entries when each index position has a specific definition.
1390 */
1391 if (phandle == 0 || phandle == -1) {
1392 /* Give up if this is an overlay with external references */
1393 if (dti->dtsflags & DTSF_PLUGIN)
1394 break;
1395
1396 cellsize = 0;
1397 continue;
1398 }
1399
1400 /* If we have markers, verify the current cell is a phandle */
1401 if (prop->val.markers) {
1402 struct marker *m = prop->val.markers;
1403 for_each_marker_of_type(m, REF_PHANDLE) {
1404 if (m->offset == (cell * sizeof(cell_t)))
1405 break;
1406 }
1407 if (!m)
1408 FAIL_PROP(c, dti, node, prop,
1409 "cell %d is not a phandle reference",
1410 cell);
1411 }
1412
1413 provider_node = get_node_by_phandle(root, phandle);
1414 if (!provider_node) {
1415 FAIL_PROP(c, dti, node, prop,
1416 "Could not get phandle node for (cell %d)",
1417 cell);
1418 break;
1419 }
1420
1421 cellprop = get_property(provider_node, provider->cell_name);
1422 if (cellprop) {
1423 cellsize = propval_cell(cellprop);
1424 } else if (provider->optional) {
1425 cellsize = 0;
1426 } else {
1427 FAIL(c, dti, node, "Missing property '%s' in node %s or bad phandle (referred from %s[%d])",
1428 provider->cell_name,
1429 provider_node->fullpath,
1430 prop->name, cell);
1431 break;
1432 }
1433
1434 if (prop->val.len < ((cell + cellsize + 1) * sizeof(cell_t))) {
1435 FAIL_PROP(c, dti, node, prop,
1436 "property size (%d) too small for cell size %d",
1437 prop->val.len, cellsize);
1438 }
1439 }
1440}
1441
1442static void check_provider_cells_property(struct check *c,
1443 struct dt_info *dti,
1444 struct node *node)
1445{
1446 struct provider *provider = c->data;
1447 struct property *prop;
1448
1449 prop = get_property(node, provider->prop_name);
1450 if (!prop)
1451 return;
1452
1453 check_property_phandle_args(c, dti, node, prop, provider);
1454}
1455#define WARNING_PROPERTY_PHANDLE_CELLS(nm, propname, cells_name, ...) \
1456 static struct provider nm##_provider = { (propname), (cells_name), __VA_ARGS__ }; \
1457 WARNING(nm##_property, check_provider_cells_property, &nm##_provider, &phandle_references);
1458
1459WARNING_PROPERTY_PHANDLE_CELLS(clocks, "clocks", "#clock-cells");
1460WARNING_PROPERTY_PHANDLE_CELLS(cooling_device, "cooling-device", "#cooling-cells");
1461WARNING_PROPERTY_PHANDLE_CELLS(dmas, "dmas", "#dma-cells");
1462WARNING_PROPERTY_PHANDLE_CELLS(hwlocks, "hwlocks", "#hwlock-cells");
1463WARNING_PROPERTY_PHANDLE_CELLS(interrupts_extended, "interrupts-extended", "#interrupt-cells");
1464WARNING_PROPERTY_PHANDLE_CELLS(io_channels, "io-channels", "#io-channel-cells");
1465WARNING_PROPERTY_PHANDLE_CELLS(iommus, "iommus", "#iommu-cells");
1466WARNING_PROPERTY_PHANDLE_CELLS(mboxes, "mboxes", "#mbox-cells");
1467WARNING_PROPERTY_PHANDLE_CELLS(msi_parent, "msi-parent", "#msi-cells", true);
1468WARNING_PROPERTY_PHANDLE_CELLS(mux_controls, "mux-controls", "#mux-control-cells");
1469WARNING_PROPERTY_PHANDLE_CELLS(phys, "phys", "#phy-cells");
1470WARNING_PROPERTY_PHANDLE_CELLS(power_domains, "power-domains", "#power-domain-cells");
1471WARNING_PROPERTY_PHANDLE_CELLS(pwms, "pwms", "#pwm-cells");
1472WARNING_PROPERTY_PHANDLE_CELLS(resets, "resets", "#reset-cells");
1473WARNING_PROPERTY_PHANDLE_CELLS(sound_dai, "sound-dai", "#sound-dai-cells");
1474WARNING_PROPERTY_PHANDLE_CELLS(thermal_sensors, "thermal-sensors", "#thermal-sensor-cells");
1475
1476static bool prop_is_gpio(struct property *prop)
1477{
1478 char *str;
1479
1480 /*
1481 * *-gpios and *-gpio can appear in property names,
1482 * so skip over any false matches (only one known ATM)
1483 */
1484 if (strstr(prop->name, "nr-gpio"))
1485 return false;
1486
1487 str = strrchr(prop->name, '-');
1488 if (str)
1489 str++;
1490 else
1491 str = prop->name;
1492 if (!(streq(str, "gpios") || streq(str, "gpio")))
1493 return false;
1494
1495 return true;
1496}
1497
1498static void check_gpios_property(struct check *c,
1499 struct dt_info *dti,
1500 struct node *node)
1501{
1502 struct property *prop;
1503
1504 /* Skip GPIO hog nodes which have 'gpios' property */
1505 if (get_property(node, "gpio-hog"))
1506 return;
1507
1508 for_each_property(node, prop) {
1509 struct provider provider;
1510
1511 if (!prop_is_gpio(prop))
1512 continue;
1513
1514 provider.prop_name = prop->name;
1515 provider.cell_name = "#gpio-cells";
1516 provider.optional = false;
1517 check_property_phandle_args(c, dti, node, prop, &provider);
1518 }
1519
1520}
1521WARNING(gpios_property, check_gpios_property, NULL, &phandle_references);
1522
1523static void check_deprecated_gpio_property(struct check *c,
1524 struct dt_info *dti,
1525 struct node *node)
1526{
1527 struct property *prop;
1528
1529 for_each_property(node, prop) {
1530 char *str;
1531
1532 if (!prop_is_gpio(prop))
1533 continue;
1534
1535 str = strstr(prop->name, "gpio");
1536 if (!streq(str, "gpio"))
1537 continue;
1538
1539 FAIL_PROP(c, dti, node, prop,
1540 "'[*-]gpio' is deprecated, use '[*-]gpios' instead");
1541 }
1542
1543}
1544CHECK(deprecated_gpio_property, check_deprecated_gpio_property, NULL);
1545
1546static bool node_is_interrupt_provider(struct node *node)
1547{
1548 struct property *prop;
1549
1550 prop = get_property(node, "interrupt-controller");
1551 if (prop)
1552 return true;
1553
1554 prop = get_property(node, "interrupt-map");
1555 if (prop)
1556 return true;
1557
1558 return false;
1559}
1560
1561static void check_interrupt_provider(struct check *c,
1562 struct dt_info *dti,
1563 struct node *node)
1564{
1565 struct property *prop;
1566
1567 if (!node_is_interrupt_provider(node))
1568 return;
1569
1570 prop = get_property(node, "#interrupt-cells");
1571 if (!prop)
1572 FAIL(c, dti, node,
1573 "Missing #interrupt-cells in interrupt provider");
1574
1575 prop = get_property(node, "#address-cells");
1576 if (!prop)
1577 FAIL(c, dti, node,
1578 "Missing #address-cells in interrupt provider");
1579}
1580WARNING(interrupt_provider, check_interrupt_provider, NULL);
1581
1582static void check_interrupts_property(struct check *c,
1583 struct dt_info *dti,
1584 struct node *node)
1585{
1586 struct node *root = dti->dt;
1587 struct node *irq_node = NULL, *parent = node;
1588 struct property *irq_prop, *prop = NULL;
1589 int irq_cells, phandle;
1590
1591 irq_prop = get_property(node, "interrupts");
1592 if (!irq_prop)
1593 return;
1594
1595 if (irq_prop->val.len % sizeof(cell_t))
1596 FAIL_PROP(c, dti, node, irq_prop, "size (%d) is invalid, expected multiple of %zu",
1597 irq_prop->val.len, sizeof(cell_t));
1598
1599 while (parent && !prop) {
1600 if (parent != node && node_is_interrupt_provider(parent)) {
1601 irq_node = parent;
1602 break;
1603 }
1604
1605 prop = get_property(parent, "interrupt-parent");
1606 if (prop) {
1607 phandle = propval_cell(prop);
1608 if ((phandle == 0) || (phandle == -1)) {
1609 /* Give up if this is an overlay with
1610 * external references */
1611 if (dti->dtsflags & DTSF_PLUGIN)
1612 return;
1613 FAIL_PROP(c, dti, parent, prop, "Invalid phandle");
1614 continue;
1615 }
1616
1617 irq_node = get_node_by_phandle(root, phandle);
1618 if (!irq_node) {
1619 FAIL_PROP(c, dti, parent, prop, "Bad phandle");
1620 return;
1621 }
1622 if (!node_is_interrupt_provider(irq_node))
1623 FAIL(c, dti, irq_node,
1624 "Missing interrupt-controller or interrupt-map property");
1625
1626 break;
1627 }
1628
1629 parent = parent->parent;
1630 }
1631
1632 if (!irq_node) {
1633 FAIL(c, dti, node, "Missing interrupt-parent");
1634 return;
1635 }
1636
1637 prop = get_property(irq_node, "#interrupt-cells");
1638 if (!prop) {
1639 /* We warn about that already in another test. */
1640 return;
1641 }
1642
1643 irq_cells = propval_cell(prop);
1644 if (irq_prop->val.len % (irq_cells * sizeof(cell_t))) {
1645 FAIL_PROP(c, dti, node, prop,
1646 "size is (%d), expected multiple of %d",
1647 irq_prop->val.len, (int)(irq_cells * sizeof(cell_t)));
1648 }
1649}
1650WARNING(interrupts_property, check_interrupts_property, &phandle_references);
1651
1652static const struct bus_type graph_port_bus = {
1653 .name = "graph-port",
1654};
1655
1656static const struct bus_type graph_ports_bus = {
1657 .name = "graph-ports",
1658};
1659
1660static void check_graph_nodes(struct check *c, struct dt_info *dti,
1661 struct node *node)
1662{
1663 struct node *child;
1664
1665 for_each_child(node, child) {
1666 if (!(strprefixeq(child->name, child->basenamelen, "endpoint") ||
1667 get_property(child, "remote-endpoint")))
1668 continue;
1669
1670 node->bus = &graph_port_bus;
1671
1672 /* The parent of 'port' nodes can be either 'ports' or a device */
1673 if (!node->parent->bus &&
1674 (streq(node->parent->name, "ports") || get_property(node, "reg")))
1675 node->parent->bus = &graph_ports_bus;
1676
1677 break;
1678 }
1679
1680}
1681WARNING(graph_nodes, check_graph_nodes, NULL);
1682
1683static void check_graph_child_address(struct check *c, struct dt_info *dti,
1684 struct node *node)
1685{
1686 int cnt = 0;
1687 struct node *child;
1688
1689 if (node->bus != &graph_ports_bus && node->bus != &graph_port_bus)
1690 return;
1691
1692 for_each_child(node, child) {
1693 struct property *prop = get_property(child, "reg");
1694
1695 /* No error if we have any non-zero unit address */
1696 if (prop && propval_cell(prop) != 0)
1697 return;
1698
1699 cnt++;
1700 }
1701
1702 if (cnt == 1 && node->addr_cells != -1)
1703 FAIL(c, dti, node, "graph node has single child node '%s', #address-cells/#size-cells are not necessary",
1704 node->children->name);
1705}
1706WARNING(graph_child_address, check_graph_child_address, NULL, &graph_nodes);
1707
1708static void check_graph_reg(struct check *c, struct dt_info *dti,
1709 struct node *node)
1710{
1711 char unit_addr[9];
1712 const char *unitname = get_unitname(node);
1713 struct property *prop;
1714
1715 prop = get_property(node, "reg");
1716 if (!prop || !unitname)
1717 return;
1718
1719 if (!(prop->val.val && prop->val.len == sizeof(cell_t))) {
1720 FAIL(c, dti, node, "graph node malformed 'reg' property");
1721 return;
1722 }
1723
1724 snprintf(unit_addr, sizeof(unit_addr), "%x", propval_cell(prop));
1725 if (!streq(unitname, unit_addr))
1726 FAIL(c, dti, node, "graph node unit address error, expected \"%s\"",
1727 unit_addr);
1728
1729 if (node->parent->addr_cells != 1)
1730 FAIL_PROP(c, dti, node, get_property(node, "#address-cells"),
1731 "graph node '#address-cells' is %d, must be 1",
1732 node->parent->addr_cells);
1733 if (node->parent->size_cells != 0)
1734 FAIL_PROP(c, dti, node, get_property(node, "#size-cells"),
1735 "graph node '#size-cells' is %d, must be 0",
1736 node->parent->size_cells);
1737}
1738
1739static void check_graph_port(struct check *c, struct dt_info *dti,
1740 struct node *node)
1741{
1742 if (node->bus != &graph_port_bus)
1743 return;
1744
1745 if (!strprefixeq(node->name, node->basenamelen, "port"))
1746 FAIL(c, dti, node, "graph port node name should be 'port'");
1747
1748 check_graph_reg(c, dti, node);
1749}
1750WARNING(graph_port, check_graph_port, NULL, &graph_nodes);
1751
1752static struct node *get_remote_endpoint(struct check *c, struct dt_info *dti,
1753 struct node *endpoint)
1754{
1755 int phandle;
1756 struct node *node;
1757 struct property *prop;
1758
1759 prop = get_property(endpoint, "remote-endpoint");
1760 if (!prop)
1761 return NULL;
1762
1763 phandle = propval_cell(prop);
1764 /* Give up if this is an overlay with external references */
1765 if (phandle == 0 || phandle == -1)
1766 return NULL;
1767
1768 node = get_node_by_phandle(dti->dt, phandle);
1769 if (!node)
1770 FAIL_PROP(c, dti, endpoint, prop, "graph phandle is not valid");
1771
1772 return node;
1773}
1774
1775static void check_graph_endpoint(struct check *c, struct dt_info *dti,
1776 struct node *node)
1777{
1778 struct node *remote_node;
1779
1780 if (!node->parent || node->parent->bus != &graph_port_bus)
1781 return;
1782
1783 if (!strprefixeq(node->name, node->basenamelen, "endpoint"))
1784 FAIL(c, dti, node, "graph endpoint node name should be 'endpoint'");
1785
1786 check_graph_reg(c, dti, node);
1787
1788 remote_node = get_remote_endpoint(c, dti, node);
1789 if (!remote_node)
1790 return;
1791
1792 if (get_remote_endpoint(c, dti, remote_node) != node)
1793 FAIL(c, dti, node, "graph connection to node '%s' is not bidirectional",
1794 remote_node->fullpath);
1795}
1796WARNING(graph_endpoint, check_graph_endpoint, NULL, &graph_nodes);
1797
1798static struct check *check_table[] = {
1799 &duplicate_node_names, &duplicate_property_names,
1800 &node_name_chars, &node_name_format, &property_name_chars,
1801 &name_is_string, &name_properties,
1802
1803 &duplicate_label,
1804
1805 &explicit_phandles,
1806 &phandle_references, &path_references,
1807 &omit_unused_nodes,
1808
1809 &address_cells_is_cell, &size_cells_is_cell, &interrupt_cells_is_cell,
1810 &device_type_is_string, &model_is_string, &status_is_string,
1811 &label_is_string,
1812
1813 &compatible_is_string_list, &names_is_string_list,
1814
1815 &property_name_chars_strict,
1816 &node_name_chars_strict,
1817
1818 &addr_size_cells, ®_format, &ranges_format, &dma_ranges_format,
1819
1820 &unit_address_vs_reg,
1821 &unit_address_format,
1822
1823 &pci_bridge,
1824 &pci_device_reg,
1825 &pci_device_bus_num,
1826
1827 &simple_bus_bridge,
1828 &simple_bus_reg,
1829
1830 &i2c_bus_bridge,
1831 &i2c_bus_reg,
1832
1833 &spi_bus_bridge,
1834 &spi_bus_reg,
1835
1836 &avoid_default_addr_size,
1837 &avoid_unnecessary_addr_size,
1838 &unique_unit_address,
1839 &unique_unit_address_if_enabled,
1840 &obsolete_chosen_interrupt_controller,
1841 &chosen_node_is_root, &chosen_node_bootargs, &chosen_node_stdout_path,
1842
1843 &clocks_property,
1844 &cooling_device_property,
1845 &dmas_property,
1846 &hwlocks_property,
1847 &interrupts_extended_property,
1848 &io_channels_property,
1849 &iommus_property,
1850 &mboxes_property,
1851 &msi_parent_property,
1852 &mux_controls_property,
1853 &phys_property,
1854 &power_domains_property,
1855 &pwms_property,
1856 &resets_property,
1857 &sound_dai_property,
1858 &thermal_sensors_property,
1859
1860 &deprecated_gpio_property,
1861 &gpios_property,
1862 &interrupts_property,
1863 &interrupt_provider,
1864
1865 &alias_paths,
1866
1867 &graph_nodes, &graph_child_address, &graph_port, &graph_endpoint,
1868
1869 &always_fail,
1870};
1871
1872static void enable_warning_error(struct check *c, bool warn, bool error)
1873{
1874 int i;
1875
1876 /* Raising level, also raise it for prereqs */
1877 if ((warn && !c->warn) || (error && !c->error))
1878 for (i = 0; i < c->num_prereqs; i++)
1879 enable_warning_error(c->prereq[i], warn, error);
1880
1881 c->warn = c->warn || warn;
1882 c->error = c->error || error;
1883}
1884
1885static void disable_warning_error(struct check *c, bool warn, bool error)
1886{
1887 int i;
1888
1889 /* Lowering level, also lower it for things this is the prereq
1890 * for */
1891 if ((warn && c->warn) || (error && c->error)) {
1892 for (i = 0; i < ARRAY_SIZE(check_table); i++) {
1893 struct check *cc = check_table[i];
1894 int j;
1895
1896 for (j = 0; j < cc->num_prereqs; j++)
1897 if (cc->prereq[j] == c)
1898 disable_warning_error(cc, warn, error);
1899 }
1900 }
1901
1902 c->warn = c->warn && !warn;
1903 c->error = c->error && !error;
1904}
1905
1906void parse_checks_option(bool warn, bool error, const char *arg)
1907{
1908 int i;
1909 const char *name = arg;
1910 bool enable = true;
1911
1912 if ((strncmp(arg, "no-", 3) == 0)
1913 || (strncmp(arg, "no_", 3) == 0)) {
1914 name = arg + 3;
1915 enable = false;
1916 }
1917
1918 for (i = 0; i < ARRAY_SIZE(check_table); i++) {
1919 struct check *c = check_table[i];
1920
1921 if (streq(c->name, name)) {
1922 if (enable)
1923 enable_warning_error(c, warn, error);
1924 else
1925 disable_warning_error(c, warn, error);
1926 return;
1927 }
1928 }
1929
1930 die("Unrecognized check name \"%s\"\n", name);
1931}
1932
1933void process_checks(bool force, struct dt_info *dti)
1934{
1935 int i;
1936 int error = 0;
1937
1938 for (i = 0; i < ARRAY_SIZE(check_table); i++) {
1939 struct check *c = check_table[i];
1940
1941 if (c->warn || c->error)
1942 error = error || run_check(c, dti);
1943 }
1944
1945 if (error) {
1946 if (!force) {
1947 fprintf(stderr, "ERROR: Input tree has errors, aborting "
1948 "(use -f to force output)\n");
1949 exit(2);
1950 } else if (quiet < 3) {
1951 fprintf(stderr, "Warning: Input tree has errors, "
1952 "output forced\n");
1953 }
1954 }
1955}