62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* NUMA support for s390
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*
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* A tree structure used for machine topology mangling
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*
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* Copyright IBM Corp. 2015
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*/
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#ifndef S390_TOPTREE_H
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#define S390_TOPTREE_H
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#include <linux/cpumask.h>
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#include <linux/list.h>
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struct toptree {
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int level;
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int id;
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cpumask_t mask;
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struct toptree *parent;
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struct list_head sibling;
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struct list_head children;
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};
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struct toptree *toptree_alloc(int level, int id);
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void toptree_free(struct toptree *cand);
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void toptree_update_mask(struct toptree *cand);
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void toptree_unify(struct toptree *cand);
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struct toptree *toptree_get_child(struct toptree *cand, int id);
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void toptree_move(struct toptree *cand, struct toptree *target);
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int toptree_count(struct toptree *context, int level);
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struct toptree *toptree_first(struct toptree *context, int level);
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struct toptree *toptree_next(struct toptree *cur, struct toptree *context,
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int level);
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#define toptree_for_each_child(child, ptree) \
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list_for_each_entry(child, &ptree->children, sibling)
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#define toptree_for_each_child_safe(child, ptmp, ptree) \
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list_for_each_entry_safe(child, ptmp, &ptree->children, sibling)
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#define toptree_is_last(ptree) \
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((ptree->parent == NULL) || \
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(ptree->parent->children.prev == &ptree->sibling))
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#define toptree_for_each(ptree, cont, ttype) \
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for (ptree = toptree_first(cont, ttype); \
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ptree != NULL; \
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ptree = toptree_next(ptree, cont, ttype))
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#define toptree_for_each_safe(ptree, tmp, cont, ttype) \
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for (ptree = toptree_first(cont, ttype), \
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tmp = toptree_next(ptree, cont, ttype); \
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ptree != NULL; \
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ptree = tmp, \
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tmp = toptree_next(ptree, cont, ttype))
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#define toptree_for_each_sibling(ptree, start) \
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toptree_for_each(ptree, start->parent, start->level)
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#endif /* S390_TOPTREE_H */
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