1 /*-
2 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #ifndef _MACHINE_COUNTER_H_
28 #define _MACHINE_COUNTER_H_
29
30 #include <sys/pcpu.h>
31 #include <machine/atomic.h>
32
33 #define EARLY_COUNTER &__pcpu[0].pc_early_dummy_counter
34
35 #define counter_enter() do {} while (0)
36 #define counter_exit() do {} while (0)
37
38 #ifdef IN_SUBR_COUNTER_C
39 static inline uint64_t
counter_u64_read_one(uint64_t * p,int cpu)40 counter_u64_read_one(uint64_t *p, int cpu)
41 {
42
43 return (*(uint64_t *)((char *)p + UMA_PCPU_ALLOC_SIZE * cpu));
44 }
45
46 static inline uint64_t
counter_u64_fetch_inline(uint64_t * p)47 counter_u64_fetch_inline(uint64_t *p)
48 {
49 uint64_t r;
50 int i;
51
52 r = 0;
53 CPU_FOREACH(i)
54 r += counter_u64_read_one(p, i);
55
56 return (r);
57 }
58
59 static void
counter_u64_zero_one_cpu(void * arg)60 counter_u64_zero_one_cpu(void *arg)
61 {
62
63 *(zpcpu_get((counter_u64_t *)arg)) = 0;
64 }
65
66 static inline void
counter_u64_zero_inline(counter_u64_t c)67 counter_u64_zero_inline(counter_u64_t c)
68 {
69
70 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu,
71 smp_no_rendezvous_barrier, c);
72 }
73 #endif
74
75 #define counter_u64_add_protected(c, inc) counter_u64_add(c, inc)
76
77 static inline void
counter_u64_add(counter_u64_t c,int64_t inc)78 counter_u64_add(counter_u64_t c, int64_t inc)
79 {
80
81 atomic_add_64((uint64_t *)zpcpu_get(c), inc);
82 }
83
84 #endif /* ! _MACHINE_COUNTER_H_ */
85