1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_RANGE_H
3 #define _LINUX_RANGE_H
4 #include <linux/types.h>
5
6 struct range {
7 u64 start;
8 u64 end;
9 };
10
range_len(const struct range * range)11 static inline u64 range_len(const struct range *range)
12 {
13 return range->end - range->start + 1;
14 }
15
16 /* True if r1 completely contains r2 */
range_contains(const struct range * r1,const struct range * r2)17 static inline bool range_contains(const struct range *r1,
18 const struct range *r2)
19 {
20 return r1->start <= r2->start && r1->end >= r2->end;
21 }
22
23 /* True if any part of r1 overlaps r2 */
range_overlaps(const struct range * r1,const struct range * r2)24 static inline bool range_overlaps(const struct range *r1,
25 const struct range *r2)
26 {
27 return r1->start <= r2->end && r1->end >= r2->start;
28 }
29
30 int add_range(struct range *range, int az, int nr_range,
31 u64 start, u64 end);
32
33
34 int add_range_with_merge(struct range *range, int az, int nr_range,
35 u64 start, u64 end);
36
37 void subtract_range(struct range *range, int az, u64 start, u64 end);
38
39 int clean_sort_range(struct range *range, int az);
40
41 void sort_range(struct range *range, int nr_range);
42
43 #define DEFINE_RANGE(_start, _end) \
44 (struct range) { \
45 .start = (_start), \
46 .end = (_end), \
47 }
48
49 #endif
50