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 32 typedef uint64_t *counter_u64_t; 33 34 #ifdef _KERNEL 35 #include <machine/counter.h> 36 37 counter_u64_t counter_u64_alloc(int); 38 void counter_u64_free(counter_u64_t); 39 40 void counter_u64_zero(counter_u64_t); 41 uint64_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 63 /* 64 * counter(9) based rate checking. 65 */ 66 struct counter_rate { 67 counter_u64_t cr_rate; /* Events since last second */ 68 volatile int cr_lock; /* Lock to clean the struct */ 69 int cr_ticks; /* Ticks on last clean */ 70 int cr_over; /* Over limit since cr_ticks? */ 71 }; 72 73 int64_t counter_ratecheck(struct counter_rate *, int64_t); 74 75 #define COUNTER_U64_SYSINIT(c) \ 76 SYSINIT(c##_counter_sysinit, SI_SUB_COUNTER, \ 77 SI_ORDER_ANY, counter_u64_sysinit, &c); \ 78 SYSUNINIT(c##_counter_sysuninit, SI_SUB_COUNTER, \ 79 SI_ORDER_ANY, counter_u64_sysuninit, &c) 80 81 #define COUNTER_U64_DEFINE_EARLY(c) \ 82 counter_u64_t __read_mostly c = EARLY_COUNTER; \ 83 COUNTER_U64_SYSINIT(c) 84 85 void counter_u64_sysinit(void *); 86 void counter_u64_sysuninit(void *); 87 88 #endif /* _KERNEL */ 89 #endif /* ! __SYS_COUNTER_H__ */ 90