14e76af6aSGleb Smirnoff /*- 24e76af6aSGleb Smirnoff * Copyright (c) 2012 Gleb Smirnoff <glebius@FreeBSD.org> 34e76af6aSGleb Smirnoff * All rights reserved. 44e76af6aSGleb Smirnoff * 54e76af6aSGleb Smirnoff * Redistribution and use in source and binary forms, with or without 64e76af6aSGleb Smirnoff * modification, are permitted provided that the following conditions 74e76af6aSGleb Smirnoff * are met: 84e76af6aSGleb Smirnoff * 1. Redistributions of source code must retain the above copyright 94e76af6aSGleb Smirnoff * notice, this list of conditions and the following disclaimer. 104e76af6aSGleb Smirnoff * 2. Redistributions in binary form must reproduce the above copyright 114e76af6aSGleb Smirnoff * notice, this list of conditions and the following disclaimer in the 124e76af6aSGleb Smirnoff * documentation and/or other materials provided with the distribution. 134e76af6aSGleb Smirnoff * 144e76af6aSGleb Smirnoff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 154e76af6aSGleb Smirnoff * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 164e76af6aSGleb Smirnoff * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 174e76af6aSGleb Smirnoff * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 184e76af6aSGleb Smirnoff * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 194e76af6aSGleb Smirnoff * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 204e76af6aSGleb Smirnoff * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 214e76af6aSGleb Smirnoff * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 224e76af6aSGleb Smirnoff * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 234e76af6aSGleb Smirnoff * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 244e76af6aSGleb Smirnoff * SUCH DAMAGE. 254e76af6aSGleb Smirnoff * 264e76af6aSGleb Smirnoff * $FreeBSD$ 274e76af6aSGleb Smirnoff */ 284e76af6aSGleb Smirnoff 294e76af6aSGleb Smirnoff #ifndef __SYS_COUNTER_H__ 304e76af6aSGleb Smirnoff #define __SYS_COUNTER_H__ 314e76af6aSGleb Smirnoff 324e76af6aSGleb Smirnoff typedef uint64_t *counter_u64_t; 334e76af6aSGleb Smirnoff 34511b5fa5SGleb Smirnoff #ifdef _KERNEL 354e76af6aSGleb Smirnoff #include <machine/counter.h> 364e76af6aSGleb Smirnoff 374e76af6aSGleb Smirnoff counter_u64_t counter_u64_alloc(int); 384e76af6aSGleb Smirnoff void counter_u64_free(counter_u64_t); 394e76af6aSGleb Smirnoff 404e76af6aSGleb Smirnoff void counter_u64_zero(counter_u64_t); 414e76af6aSGleb Smirnoff uint64_t counter_u64_fetch(counter_u64_t); 424e76af6aSGleb Smirnoff 437daad711SAndrey V. Elsukov #define COUNTER_ARRAY_ALLOC(a, n, wait) do { \ 447daad711SAndrey V. Elsukov for (int i = 0; i < (n); i++) \ 457daad711SAndrey V. Elsukov (a)[i] = counter_u64_alloc(wait); \ 467daad711SAndrey V. Elsukov } while (0) 477daad711SAndrey V. Elsukov 487daad711SAndrey V. Elsukov #define COUNTER_ARRAY_FREE(a, n) do { \ 497daad711SAndrey V. Elsukov for (int i = 0; i < (n); i++) \ 507daad711SAndrey V. Elsukov counter_u64_free((a)[i]); \ 517daad711SAndrey V. Elsukov } while (0) 527daad711SAndrey V. Elsukov 537daad711SAndrey V. Elsukov #define COUNTER_ARRAY_COPY(a, dstp, n) do { \ 547daad711SAndrey V. Elsukov for (int i = 0; i < (n); i++) \ 557daad711SAndrey V. Elsukov ((uint64_t *)(dstp))[i] = counter_u64_fetch((a)[i]);\ 567daad711SAndrey V. Elsukov } while (0) 577daad711SAndrey V. Elsukov 587daad711SAndrey V. Elsukov #define COUNTER_ARRAY_ZERO(a, n) do { \ 597daad711SAndrey V. Elsukov for (int i = 0; i < (n); i++) \ 607daad711SAndrey V. Elsukov counter_u64_zero((a)[i]); \ 617daad711SAndrey V. Elsukov } while (0) 6216917020SGleb Smirnoff 6316917020SGleb Smirnoff /* 6416917020SGleb Smirnoff * counter(9) based rate checking. 6516917020SGleb Smirnoff */ 6616917020SGleb Smirnoff struct counter_rate { 6716917020SGleb Smirnoff counter_u64_t cr_rate; /* Events since last second */ 6816917020SGleb Smirnoff volatile int cr_lock; /* Lock to clean the struct */ 6916917020SGleb Smirnoff int cr_ticks; /* Ticks on last clean */ 7016917020SGleb Smirnoff int cr_over; /* Over limit since cr_ticks? */ 7116917020SGleb Smirnoff }; 7216917020SGleb Smirnoff 7316917020SGleb Smirnoff int64_t counter_ratecheck(struct counter_rate *, int64_t); 7416917020SGleb Smirnoff 75511b5fa5SGleb Smirnoff #endif /* _KERNEL */ 764e76af6aSGleb Smirnoff #endif /* ! __SYS_COUNTER_H__ */ 77