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