1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#ifndef __SYS_COUNTER_H__
30#define __SYS_COUNTER_H__
31
32typedef uint64_t *counter_u64_t;
33
34#ifdef _KERNEL
35#include <machine/counter.h>
36
37counter_u64_t counter_u64_alloc(int);
38void counter_u64_free(counter_u64_t);
39
40void counter_u64_zero(counter_u64_t);
41uint64_t counter_u64_fetch(counter_u64_t);
42
43#define COUNTER_ARRAY_ALLOC(a, n, wait) do { \
44 for (int _i = 0; _i < (n); _i++) \
45 (a)[_i] = counter_u64_alloc(wait); \
46} while (0)
47
48#define COUNTER_ARRAY_FREE(a, n) do { \
49 for (int _i = 0; _i < (n); _i++) \
50 counter_u64_free((a)[_i]); \
51} while (0)
52
53#define COUNTER_ARRAY_COPY(a, dstp, n) do { \
54 for (int _i = 0; _i < (n); _i++) \
55 ((uint64_t *)(dstp))[_i] = counter_u64_fetch((a)[_i]);\
56} while (0)
57
58#define COUNTER_ARRAY_ZERO(a, n) do { \
59 for (int _i = 0; _i < (n); _i++) \
60 counter_u64_zero((a)[_i]); \
61} while (0)
62
63struct counter_rate;
64
65struct counter_rate *counter_rate_alloc(int flags, int period);
66void counter_rate_free(struct counter_rate *);
67int64_t counter_ratecheck(struct counter_rate *, int64_t);
68uint64_t counter_rate_get(struct counter_rate *);
69
70#define COUNTER_U64_SYSINIT(c) \
71 SYSINIT(c##_counter_sysinit, SI_SUB_COUNTER, \
72 SI_ORDER_ANY, counter_u64_sysinit, &c); \
73 SYSUNINIT(c##_counter_sysuninit, SI_SUB_COUNTER, \
74 SI_ORDER_ANY, counter_u64_sysuninit, &c)
75
76#define COUNTER_U64_DEFINE_EARLY(c) \
77 counter_u64_t __read_mostly c = EARLY_COUNTER; \
78 COUNTER_U64_SYSINIT(c)
79
80void counter_u64_sysinit(void *);
81void counter_u64_sysuninit(void *);
82
83#endif /* _KERNEL */
84#endif /* ! __SYS_COUNTER_H__ */