1 /* $FreeBSD$ */ 2 /* $OpenBSD$ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-4-Clause 6 * 7 * Copyright (c) 2002 Jason L. Wright (jason@thought.net) 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Jason L. Wright 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 26 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 27 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 32 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 33 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 /* Some of the tests depend on these values */ 38 #define RNDTEST_NBYTES 2500 39 #define RNDTEST_NBITS (8 * RNDTEST_NBYTES) 40 41 struct rndtest_state { 42 device_t rs_parent; /* associated device */ 43 u_int8_t *rs_end, *rs_begin, *rs_current; 44 struct callout rs_to; 45 int rs_collect; /* collect and test data */ 46 int rs_discard; /* discard/accept random data */ 47 u_int8_t rs_buf[RNDTEST_NBYTES]; 48 }; 49 50 struct rndtest_stats { 51 u_int32_t rst_discard; /* number of bytes discarded */ 52 u_int32_t rst_tests; /* number of test runs */ 53 u_int32_t rst_monobit; /* monobit test failures */ 54 u_int32_t rst_runs; /* 0/1 runs failures */ 55 u_int32_t rst_longruns; /* longruns failures */ 56 u_int32_t rst_chi; /* chi^2 failures */ 57 }; 58 59 extern struct rndtest_state *rndtest_attach(device_t dev); 60 extern void rndtest_detach(struct rndtest_state *); 61 extern void rndtest_harvest(struct rndtest_state *arg, void * buf, u_int len); 62