1 /* $NetBSD: fdvar.h,v 1.1 2003/01/08 23:51:11 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 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 the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include "rnd.h" 40 41 #if NRND > 0 42 #include <sys/rnd.h> 43 #endif 44 45 /* 46 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 47 * we tell them apart. 48 */ 49 struct fd_type { 50 int sectrac; /* sectors per track */ 51 int heads; /* number of heads */ 52 int seccyl; /* sectors per cylinder */ 53 int secsize; /* size code for sectors */ 54 int datalen; /* data len when secsize = 0 */ 55 int steprate; /* step rate and head unload time */ 56 int gap1; /* gap len between sectors */ 57 int gap2; /* formatting gap */ 58 int cyls; /* total num of cylinders */ 59 int size; /* size of disk in sectors */ 60 int step; /* steps per cylinder */ 61 int rate; /* transfer speed code */ 62 u_char fillbyte; /* format fill byte */ 63 u_char interleave; /* interleave factor (formatting) */ 64 const char *name; 65 }; 66 67 /* software state, per disk (with up to 4 disks per ctlr) */ 68 struct fd_softc { 69 struct device sc_dev; 70 struct disk sc_dk; 71 72 const struct fd_type *sc_deftype; /* default type descriptor */ 73 struct fd_type *sc_type; /* current type descriptor */ 74 struct fd_type sc_type_copy; /* copy for fiddling when formatting */ 75 76 struct callout sc_motoron_ch; 77 struct callout sc_motoroff_ch; 78 79 daddr_t sc_blkno; /* starting block number */ 80 int sc_bcount; /* byte count left */ 81 int sc_opts; /* user-set options */ 82 int sc_skip; /* bytes already transferred */ 83 int sc_nblks; /* number of blocks currently transferring */ 84 int sc_nbytes; /* number of bytes currently transferring */ 85 86 int sc_drive; /* physical unit number */ 87 int sc_flags; 88 #define FD_OPEN 0x01 /* it's open */ 89 #define FD_MOTOR 0x02 /* motor should be on */ 90 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 91 int sc_cylin; /* where we think the head is */ 92 93 void *sc_sdhook; /* saved shutdown hook for drive. */ 94 95 TAILQ_ENTRY(fd_softc) sc_drivechain; 96 int sc_ops; /* I/O ops since last switch */ 97 struct bufq_state sc_q; /* pending I/O requests */ 98 int sc_active; /* number of active I/O operations */ 99 100 #if NRND > 0 101 rndsource_element_t rnd_source; 102 #endif 103 }; 104