| 1 | /* $NetBSD: fdvar.h,v 1.9 2015/04/13 16:33:24 riastradh 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 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <sys/rndsource.h> |
| 33 | |
| 34 | /* |
| 35 | * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how |
| 36 | * we tell them apart. |
| 37 | */ |
| 38 | struct fd_type { |
| 39 | int sectrac; /* sectors per track */ |
| 40 | int heads; /* number of heads */ |
| 41 | int seccyl; /* sectors per cylinder */ |
| 42 | int secsize; /* size code for sectors */ |
| 43 | int datalen; /* data len when secsize = 0 */ |
| 44 | int steprate; /* step rate and head unload time */ |
| 45 | int gap1; /* gap len between sectors */ |
| 46 | int gap2; /* formatting gap */ |
| 47 | int cyls; /* total num of cylinders */ |
| 48 | int size; /* size of disk in sectors */ |
| 49 | int step; /* steps per cylinder */ |
| 50 | int rate; /* transfer speed code */ |
| 51 | u_char fillbyte; /* format fill byte */ |
| 52 | u_char interleave; /* interleave factor (formatting) */ |
| 53 | const char *name; |
| 54 | }; |
| 55 | |
| 56 | /* software state, per disk (with up to 4 disks per ctlr) */ |
| 57 | struct fd_softc { |
| 58 | device_t sc_dev; |
| 59 | struct disk sc_dk; |
| 60 | |
| 61 | const struct fd_type *sc_deftype; /* default type descriptor */ |
| 62 | struct fd_type *sc_type; /* current type descriptor */ |
| 63 | struct fd_type sc_type_copy; /* copy for fiddling when formatting */ |
| 64 | |
| 65 | struct callout sc_motoron_ch; |
| 66 | struct callout sc_motoroff_ch; |
| 67 | |
| 68 | daddr_t sc_blkno; /* starting block number */ |
| 69 | int sc_bcount; /* byte count left */ |
| 70 | int sc_opts; /* user-set options */ |
| 71 | int sc_skip; /* bytes already transferred */ |
| 72 | int sc_nblks; /* number of blocks currently transferring */ |
| 73 | int sc_nbytes; /* number of bytes currently transferring */ |
| 74 | |
| 75 | int sc_drive; /* physical unit number */ |
| 76 | int sc_flags; |
| 77 | #define FD_OPEN 0x01 /* it's open */ |
| 78 | #define FD_MOTOR 0x02 /* motor should be on */ |
| 79 | #define FD_MOTOR_WAIT 0x04 /* motor coming up */ |
| 80 | int sc_cylin; /* where we think the head is */ |
| 81 | |
| 82 | void *sc_roothook; /* mountroot hook */ |
| 83 | |
| 84 | TAILQ_ENTRY(fd_softc) sc_drivechain; |
| 85 | int sc_ops; /* I/O ops since last switch */ |
| 86 | struct bufq_state *sc_q;/* pending I/O requests */ |
| 87 | int sc_active; /* number of active I/O operations */ |
| 88 | |
| 89 | krndsource_t rnd_source; |
| 90 | }; |
| 91 | |