Lines Matching +full:non +full:- +full:live
1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2012 Pantelis Antoniou <panto@antoniou-consulting.com>
27 * struct target - info about current target node as recursing through overlay
29 * @in_livetree: @np is a node in the live devicetree
33 * in the live devicetree where the overlay subtree is targeted to be grafted
35 * also recurses to the next level of the live devicetree, as long as overlay
36 * subtree node also exists in the live devicetree. When a node in the overlay
37 * subtree does not exist at the same level in the live devicetree, target->np
47 * struct fragment - info about fragment nodes in overlay expanded device tree
67 * @cset: changeset to apply fragments to live device tree
82 /* flags are sticky - once set, do not reset */
89 return p1->length == p2->length && in of_prop_val_eq()
90 !memcmp(p1->value, p2->value, (size_t)p1->length); in of_prop_val_eq()
108 * of_resolve_phandles() finds the largest phandle in the live tree.
109 * of_overlay_apply() may add a larger phandle to the live tree.
134 * of_overlay_notifier_register() - Register notifier for overlay operations
152 * of_overlay_notifier_unregister() - Unregister notifier for overlay operations
167 ovcs->notify_state = action; in overlay_notify()
169 for (i = 0; i < ovcs->count; i++) { in overlay_notify()
170 struct fragment *fragment = &ovcs->fragments[i]; in overlay_notify()
172 nd.target = fragment->target; in overlay_notify()
173 nd.overlay = fragment->overlay; in overlay_notify()
190 * the ovcs->overlay_root. When duplicating the properties, the paths
191 * need to be adjusted to be the correct path for the live device tree.
195 * where symbol_path_tail can be a single node or it may be a multi-node path.
217 if (!prop->value) in dup_and_fixup_symbol_prop()
219 if (strnlen(prop->value, prop->length) >= prop->length) in dup_and_fixup_symbol_prop()
221 path = prop->value; in dup_and_fixup_symbol_prop()
226 fragment_node = __of_find_node_by_path(ovcs->overlay_root, path + 1); in dup_and_fixup_symbol_prop()
231 for (k = 0; k < ovcs->count; k++) { in dup_and_fixup_symbol_prop()
232 fragment = &ovcs->fragments[k]; in dup_and_fixup_symbol_prop()
233 if (fragment->overlay == overlay_node) in dup_and_fixup_symbol_prop()
236 if (k >= ovcs->count) in dup_and_fixup_symbol_prop()
239 overlay_name_len = snprintf(NULL, 0, "%pOF", fragment->overlay); in dup_and_fixup_symbol_prop()
246 target_path = kasprintf(GFP_KERNEL, "%pOF", fragment->target); in dup_and_fixup_symbol_prop()
255 new_prop->name = kstrdup(prop->name, GFP_KERNEL); in dup_and_fixup_symbol_prop()
256 new_prop->length = target_path_len + path_tail_len + 1; in dup_and_fixup_symbol_prop()
257 new_prop->value = kzalloc(new_prop->length, GFP_KERNEL); in dup_and_fixup_symbol_prop()
258 if (!new_prop->name || !new_prop->value) in dup_and_fixup_symbol_prop()
261 strcpy(new_prop->value, target_path); in dup_and_fixup_symbol_prop()
262 strcpy(new_prop->value + target_path_len, path_tail); in dup_and_fixup_symbol_prop()
279 * add_changeset_property() - add @overlay_prop to overlay changeset
285 * If @overlay_prop does not already exist in live devicetree, add changeset
289 * @target may be either in the live devicetree or in a new subtree that
295 * Properties "#address-cells" and "#size-cells" are not updated if they
296 * are already in the live tree, but if present in the live tree, the values
297 * in the overlay must match the values in the live tree.
301 * Return: 0 on success, -ENOMEM if memory allocation failure, or -EINVAL if
312 if (target->in_livetree) in add_changeset_property()
313 if (is_pseudo_property(overlay_prop->name)) in add_changeset_property()
316 if (target->in_livetree) in add_changeset_property()
317 prop = of_find_property(target->np, overlay_prop->name, NULL); in add_changeset_property()
322 if (!of_prop_cmp(prop->name, "#address-cells")) { in add_changeset_property()
324 pr_err("ERROR: changing value of #address-cells is not allowed in %pOF\n", in add_changeset_property()
325 target->np); in add_changeset_property()
326 ret = -EINVAL; in add_changeset_property()
330 } else if (!of_prop_cmp(prop->name, "#size-cells")) { in add_changeset_property()
332 pr_err("ERROR: changing value of #size-cells is not allowed in %pOF\n", in add_changeset_property()
333 target->np); in add_changeset_property()
334 ret = -EINVAL; in add_changeset_property()
342 return -EINVAL; in add_changeset_property()
349 return -ENOMEM; in add_changeset_property()
352 if (!target->in_livetree) { in add_changeset_property()
353 new_prop->next = target->np->deadprops; in add_changeset_property()
354 target->np->deadprops = new_prop; in add_changeset_property()
356 ret = of_changeset_add_property(&ovcs->cset, target->np, in add_changeset_property()
359 ret = of_changeset_update_property(&ovcs->cset, target->np, in add_changeset_property()
363 if (!of_node_check_flag(target->np, OF_OVERLAY)) in add_changeset_property()
365 target->np, new_prop->name); in add_changeset_property()
373 * add_changeset_node() - add @node (and children) to overlay changeset
375 * @target: where @node will be placed in live tree or changeset
387 * NOTE_1: A live devicetree created from a flattened device tree (FDT) will
388 * not contain the full path in node->full_name. Thus an overlay
390 * node->full_name. However, a live devicetree created from Open
391 * Firmware may have the full path in node->full_name.
394 * the full path in node->full_name. Even though it expects the overlay
397 * to nodes in the live devicetree so that it can apply an overlay to
398 * a live devicetree created from Open Firmware.
402 * Return: 0 on success, -ENOMEM if memory allocation failure, or -EINVAL if
414 node_kbasename = kbasename(node->full_name); in add_changeset_node()
416 for_each_child_of_node(target->np, tchild) in add_changeset_node()
417 if (!of_node_cmp(node_kbasename, kbasename(tchild->full_name))) in add_changeset_node()
423 return -ENOMEM; in add_changeset_node()
425 tchild->parent = target->np; in add_changeset_node()
426 tchild->name = __of_get_property(node, "name", NULL); in add_changeset_node()
428 if (!tchild->name) in add_changeset_node()
429 tchild->name = "<NULL>"; in add_changeset_node()
434 tchild->phandle = be32_to_cpup(phandle); in add_changeset_node()
438 ret = of_changeset_attach_node(&ovcs->cset, tchild); in add_changeset_node()
450 if (node->phandle && tchild->phandle) { in add_changeset_node()
451 ret = -EINVAL; in add_changeset_node()
454 target_child.in_livetree = target->in_livetree; in add_changeset_node()
463 * build_changeset_next_level() - add level of overlay changeset
465 * @target: where to place @overlay_node in live tree
469 * @ovcs->cset changeset. If an added node has child nodes, they will
474 * Return: 0 on success, -ENOMEM if memory allocation failure, or -EINVAL if
487 target->np, prop->name, ret); in build_changeset_next_level()
496 target->np, child, ret); in build_changeset_next_level()
505 * Add the properties from __overlay__ node to the @ovcs->cset changeset.
518 target->np, prop->name, ret); in build_changeset_symbols_node()
533 if (ce_1->action != OF_RECONFIG_ATTACH_NODE && in find_dup_cset_node_entry()
534 ce_1->action != OF_RECONFIG_DETACH_NODE) in find_dup_cset_node_entry()
538 list_for_each_entry_continue(ce_2, &ovcs->cset.entries, node) { in find_dup_cset_node_entry()
539 if ((ce_2->action != OF_RECONFIG_ATTACH_NODE && in find_dup_cset_node_entry()
540 ce_2->action != OF_RECONFIG_DETACH_NODE) || in find_dup_cset_node_entry()
541 of_node_cmp(ce_1->np->full_name, ce_2->np->full_name)) in find_dup_cset_node_entry()
544 fn_1 = kasprintf(GFP_KERNEL, "%pOF", ce_1->np); in find_dup_cset_node_entry()
545 fn_2 = kasprintf(GFP_KERNEL, "%pOF", ce_2->np); in find_dup_cset_node_entry()
551 ce_1->np); in find_dup_cset_node_entry()
552 return -EINVAL; in find_dup_cset_node_entry()
566 if (ce_1->action != OF_RECONFIG_ADD_PROPERTY && in find_dup_cset_prop()
567 ce_1->action != OF_RECONFIG_REMOVE_PROPERTY && in find_dup_cset_prop()
568 ce_1->action != OF_RECONFIG_UPDATE_PROPERTY) in find_dup_cset_prop()
572 list_for_each_entry_continue(ce_2, &ovcs->cset.entries, node) { in find_dup_cset_prop()
573 if ((ce_2->action != OF_RECONFIG_ADD_PROPERTY && in find_dup_cset_prop()
574 ce_2->action != OF_RECONFIG_REMOVE_PROPERTY && in find_dup_cset_prop()
575 ce_2->action != OF_RECONFIG_UPDATE_PROPERTY) || in find_dup_cset_prop()
576 of_node_cmp(ce_1->np->full_name, ce_2->np->full_name)) in find_dup_cset_prop()
579 fn_1 = kasprintf(GFP_KERNEL, "%pOF", ce_1->np); in find_dup_cset_prop()
580 fn_2 = kasprintf(GFP_KERNEL, "%pOF", ce_2->np); in find_dup_cset_prop()
585 !of_prop_cmp(ce_1->prop->name, ce_2->prop->name)) { in find_dup_cset_prop()
587 ce_1->np, ce_1->prop->name); in find_dup_cset_prop()
588 return -EINVAL; in find_dup_cset_prop()
596 * changeset_dup_entry_check() - check for duplicate entries
599 * Check changeset @ovcs->cset for multiple {add or delete} node entries for
603 * Return: 0 on success, or -EINVAL if duplicate changeset entry found.
610 list_for_each_entry(ce_1, &ovcs->cset.entries, node) { in changeset_dup_entry_check()
615 return dup_entry ? -EINVAL : 0; in changeset_dup_entry_check()
619 * build_changeset() - populate overlay changeset in @ovcs from @ovcs->fragments
622 * Create changeset @ovcs->cset to contain the nodes and properties of the
623 * overlay device tree fragments in @ovcs->fragments[]. If an error occurs,
625 * in @ovcs->cset.
627 * Return: 0 on success, -ENOMEM if memory allocation failure, or -EINVAL if
628 * invalid overlay in @ovcs->fragments[].
637 * if there is a symbols fragment in ovcs->fragments[i] it is in build_changeset()
640 if (ovcs->symbols_fragment) in build_changeset()
641 fragments_count = ovcs->count - 1; in build_changeset()
643 fragments_count = ovcs->count; in build_changeset()
646 fragment = &ovcs->fragments[i]; in build_changeset()
648 target.np = fragment->target; in build_changeset()
651 fragment->overlay); in build_changeset()
654 fragment->target); in build_changeset()
659 if (ovcs->symbols_fragment) { in build_changeset()
660 fragment = &ovcs->fragments[ovcs->count - 1]; in build_changeset()
662 target.np = fragment->target; in build_changeset()
665 fragment->overlay); in build_changeset()
668 fragment->target); in build_changeset()
681 * 2) "target-path" property containing the path of the target
701 ret = of_property_read_string(info_node, "target-path", &path); in find_target()
729 * init_overlay_changeset() - initialize overlay changeset from overlay tree
733 * Initialize @ovcs. Populate @ovcs->fragments with node information from
738 * Return: 0 on success, -ENOMEM if memory allocation failure, -EINVAL if error
758 * Warn for some issues. Can not return -EINVAL for these until in init_overlay_changeset()
761 if (!of_node_check_flag(ovcs->overlay_root, OF_DYNAMIC)) in init_overlay_changeset()
762 pr_debug("%s() ovcs->overlay_root is not dynamic\n", __func__); in init_overlay_changeset()
764 if (!of_node_check_flag(ovcs->overlay_root, OF_DETACHED)) in init_overlay_changeset()
765 pr_debug("%s() ovcs->overlay_root is not detached\n", __func__); in init_overlay_changeset()
767 if (!of_node_is_root(ovcs->overlay_root)) in init_overlay_changeset()
768 pr_debug("%s() ovcs->overlay_root is not root\n", __func__); in init_overlay_changeset()
773 for_each_child_of_node(ovcs->overlay_root, node) { in init_overlay_changeset()
781 node = of_get_child_by_name(ovcs->overlay_root, "__symbols__"); in init_overlay_changeset()
789 ret = -ENOMEM; in init_overlay_changeset()
792 ovcs->fragments = fragments; in init_overlay_changeset()
795 for_each_child_of_node(ovcs->overlay_root, node) { in init_overlay_changeset()
801 fragment->overlay = overlay_node; in init_overlay_changeset()
802 fragment->target = find_target(node, target_base); in init_overlay_changeset()
803 if (!fragment->target) { in init_overlay_changeset()
804 of_node_put(fragment->overlay); in init_overlay_changeset()
805 ret = -EINVAL; in init_overlay_changeset()
814 * if there is a symbols fragment in ovcs->fragments[i] it is in init_overlay_changeset()
817 node = of_get_child_by_name(ovcs->overlay_root, "__symbols__"); in init_overlay_changeset()
819 ovcs->symbols_fragment = 1; in init_overlay_changeset()
821 fragment->overlay = node; in init_overlay_changeset()
822 fragment->target = of_find_node_by_path("/__symbols__"); in init_overlay_changeset()
824 if (!fragment->target) { in init_overlay_changeset()
825 pr_err("symbols in overlay, but not in live tree\n"); in init_overlay_changeset()
826 ret = -EINVAL; in init_overlay_changeset()
836 ret = -EINVAL; in init_overlay_changeset()
840 ovcs->count = cnt; in init_overlay_changeset()
854 if (ovcs->cset.entries.next) in free_overlay_changeset()
855 of_changeset_destroy(&ovcs->cset); in free_overlay_changeset()
857 if (ovcs->id) { in free_overlay_changeset()
858 idr_remove(&ovcs_idr, ovcs->id); in free_overlay_changeset()
859 list_del(&ovcs->ovcs_list); in free_overlay_changeset()
860 ovcs->id = 0; in free_overlay_changeset()
864 for (i = 0; i < ovcs->count; i++) { in free_overlay_changeset()
865 of_node_put(ovcs->fragments[i].target); in free_overlay_changeset()
866 of_node_put(ovcs->fragments[i].overlay); in free_overlay_changeset()
868 kfree(ovcs->fragments); in free_overlay_changeset()
871 * There should be no live pointers into ovcs->overlay_mem and in free_overlay_changeset()
872 * ovcs->new_fdt due to the policy that overlay notifiers are not in free_overlay_changeset()
880 if (ovcs->notify_state == OF_OVERLAY_INIT || in free_overlay_changeset()
881 ovcs->notify_state == OF_OVERLAY_POST_REMOVE) { in free_overlay_changeset()
882 kfree(ovcs->overlay_mem); in free_overlay_changeset()
883 kfree(ovcs->new_fdt); in free_overlay_changeset()
891 * of_overlay_apply() - Create and apply an overlay changeset
897 * If an error is returned by an overlay changeset pre-apply notifier
898 * then no further overlay changeset pre-apply notifier will be called.
900 * If an error is returned by an overlay changeset post-apply notifier
901 * then no further overlay changeset post-apply notifier will be called.
922 ret = of_resolve_phandles(ovcs->overlay_root); in of_overlay_apply()
939 ret = __of_changeset_apply_entries(&ovcs->cset, &ret_revert); in of_overlay_apply()
949 ret = __of_changeset_apply_notify(&ovcs->cset); in of_overlay_apply()
966 * of_overlay_fdt_apply() - Create and apply an overlay changeset
999 return -EBUSY; in of_overlay_fdt_apply()
1005 return -EINVAL; in of_overlay_fdt_apply()
1010 return -EINVAL; in of_overlay_fdt_apply()
1014 return -ENOMEM; in of_overlay_fdt_apply()
1020 * ovcs->notify_state must be set to OF_OVERLAY_INIT before allocating in of_overlay_fdt_apply()
1024 ovcs->id = idr_alloc(&ovcs_idr, ovcs, 1, 0, GFP_KERNEL); in of_overlay_fdt_apply()
1025 if (ovcs->id <= 0) { in of_overlay_fdt_apply()
1026 ret = ovcs->id; in of_overlay_fdt_apply()
1030 INIT_LIST_HEAD(&ovcs->ovcs_list); in of_overlay_fdt_apply()
1031 list_add_tail(&ovcs->ovcs_list, &ovcs_list); in of_overlay_fdt_apply()
1032 of_changeset_init(&ovcs->cset); in of_overlay_fdt_apply()
1040 ret = -ENOMEM; in of_overlay_fdt_apply()
1043 ovcs->new_fdt = new_fdt; in of_overlay_fdt_apply()
1049 &ovcs->overlay_root); in of_overlay_fdt_apply()
1052 ret = -EINVAL; in of_overlay_fdt_apply()
1055 ovcs->overlay_mem = overlay_mem; in of_overlay_fdt_apply()
1064 *ret_ovcs_id = ovcs->id; in of_overlay_fdt_apply()
1111 list_for_each_entry(ce, &ovcs->cset.entries, node) { in node_overlaps_later_cs()
1112 if (find_node(ce->np, remove_ce_node)) { in node_overlaps_later_cs()
1114 __func__, remove_ovcs->id, ovcs->id, in node_overlaps_later_cs()
1118 if (find_node(remove_ce_node, ce->np)) { in node_overlaps_later_cs()
1120 __func__, remove_ovcs->id, ovcs->id, in node_overlaps_later_cs()
1131 * We can safely remove the overlay only if it's the top-most one.
1144 list_for_each_entry(remove_ce, &remove_ovcs->cset.entries, node) { in overlay_removal_is_ok()
1145 if (node_overlaps_later_cs(remove_ovcs, remove_ce->np)) { in overlay_removal_is_ok()
1146 pr_err("overlay #%d is not topmost\n", remove_ovcs->id); in overlay_removal_is_ok()
1155 * of_overlay_remove() - Revert and free an overlay changeset
1162 * then an attempt is made to re-apply any changeset entry that was
1163 * reverted. If an error occurs on re-apply then the state of the device
1167 * A non-zero return value will not revert the changeset if error is from:
1168 * - parameter checks
1169 * - overlay changeset pre-remove notifier
1170 * - overlay changeset entry revert
1172 * If an error is returned by an overlay changeset pre-remove notifier
1173 * then no further overlay changeset pre-remove notifier will be called.
1178 * A non-zero return value will revert the changeset if error is from:
1179 * - overlay changeset entry notifier
1180 * - overlay changeset post-remove notifier
1182 * If an error is returned by an overlay changeset post-remove notifier
1183 * then no further overlay changeset post-remove notifier will be called.
1195 ret = -EBUSY; in of_overlay_remove()
1203 ret = -ENODEV; in of_overlay_remove()
1209 ret = -EBUSY; in of_overlay_remove()
1218 ret = __of_changeset_revert_entries(&ovcs->cset, &ret_apply); in of_overlay_remove()
1225 ret = __of_changeset_revert_notify(&ovcs->cset); in of_overlay_remove()
1260 * of_overlay_remove_all() - Reverts and frees all overlay changesets
1273 ret = of_overlay_remove(&ovcs->id); in of_overlay_remove_all()