conf.h revision 46676
1/*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 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 University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)conf.h 8.5 (Berkeley) 1/9/95 39 * $Id: conf.h,v 1.51 1999/05/07 10:11:23 phk Exp $ 40 */ 41 42#ifndef _SYS_CONF_H_ 43#define _SYS_CONF_H_ 44 45/* 46 * Definitions of device driver entry switches 47 */ 48 49struct buf; 50struct proc; 51struct specinfo; 52struct tty; 53struct uio; 54struct vnode; 55 56typedef int d_open_t __P((dev_t dev, int oflags, int devtype, struct proc *p)); 57typedef int d_close_t __P((dev_t dev, int fflag, int devtype, struct proc *p)); 58typedef void d_strategy_t __P((struct buf *bp)); 59typedef int d_parms_t __P((dev_t dev, struct specinfo *sinfo, int ctl)); 60typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data, 61 int fflag, struct proc *p)); 62typedef int d_dump_t __P((dev_t dev)); 63typedef int d_psize_t __P((dev_t dev)); 64 65typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag)); 66typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag)); 67typedef void d_stop_t __P((struct tty *tp, int rw)); 68typedef int d_reset_t __P((dev_t dev)); 69typedef struct tty *d_devtotty_t __P((dev_t dev)); 70typedef int d_poll_t __P((dev_t dev, int events, struct proc *p)); 71typedef int d_mmap_t __P((dev_t dev, vm_offset_t offset, int nprot)); 72 73typedef int l_open_t __P((dev_t dev, struct tty *tp)); 74typedef int l_close_t __P((struct tty *tp, int flag)); 75typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag)); 76typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag)); 77typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data, 78 int flag, struct proc *p)); 79typedef int l_rint_t __P((int c, struct tty *tp)); 80typedef int l_start_t __P((struct tty *tp)); 81typedef int l_modem_t __P((struct tty *tp, int flag)); 82 83/* 84 * Types for d_type. 85 */ 86#define D_TAPE 1 87#define D_DISK 2 88#define D_TTY 3 89 90#define D_TYPEMASK 0xffff 91 92/* 93 * Flags for d_flags. 94 */ 95#define D_NOCLUSTERR 0x10000 /* disables cluter read */ 96#define D_NOCLUSTERW 0x20000 /* disables cluster write */ 97#define D_NOCLUSTERRW (D_NOCLUSTERR | D_NOCLUSTERW) 98#define D_CANFREE 0x40000 /* can free blocks */ 99 100/* 101 * Control type for d_parms() call. 102 */ 103#define DPARM_GET 0 /* ask device to load parms in */ 104 105/* 106 * Character device switch table 107 */ 108struct cdevsw { 109 d_open_t *d_open; 110 d_close_t *d_close; 111 d_read_t *d_read; 112 d_write_t *d_write; 113 d_ioctl_t *d_ioctl; 114 d_stop_t *d_stop; 115 d_reset_t *d_reset; /* XXX not used */ 116 d_devtotty_t *d_devtotty; 117 d_poll_t *d_poll; 118 d_mmap_t *d_mmap; 119 d_strategy_t *d_strategy; 120 char *d_name; /* base device name, e.g. 'vn' */ 121 d_parms_t *d_parms; /* populate/override specinfo */ 122 int d_maj; 123 d_dump_t *d_dump; 124 d_psize_t *d_psize; 125 u_int d_flags; 126 int d_maxio; 127 int d_bmaj; 128}; 129 130#ifdef KERNEL 131extern struct cdevsw *cdevsw[]; 132extern int bmaj2cmaj[]; 133 134static __inline 135struct cdevsw * 136devsw(dev_t dev) 137{ 138 return(cdevsw[major(dev)]); 139} 140 141static __inline 142struct cdevsw * 143bdevsw(dev_t dev) 144{ 145 struct cdevsw *c = cdevsw[bmaj2cmaj[major(dev)]]; 146 /* CMAJ zero is the console, which has no strategy so this works */ 147 if (c->d_strategy) 148 return (c); 149 return (0); 150} 151#endif 152 153/* 154 * Line discipline switch table 155 */ 156struct linesw { 157 l_open_t *l_open; 158 l_close_t *l_close; 159 l_read_t *l_read; 160 l_write_t *l_write; 161 l_ioctl_t *l_ioctl; 162 l_rint_t *l_rint; 163 l_start_t *l_start; 164 l_modem_t *l_modem; 165 u_char l_hotchar; 166}; 167 168#ifdef KERNEL 169extern struct linesw linesw[]; 170extern int nlinesw; 171 172int ldisc_register __P((int , struct linesw *)); 173void ldisc_deregister __P((int)); 174#define LDISC_LOAD -1 /* Loadable line discipline */ 175#endif 176 177/* 178 * Swap device table 179 */ 180struct swdevt { 181 dev_t sw_dev; 182 int sw_flags; 183 int sw_nblks; 184 struct vnode *sw_vp; 185}; 186#define SW_FREED 0x01 187#define SW_SEQUENTIAL 0x02 188#define sw_freed sw_flags /* XXX compat */ 189 190#ifdef KERNEL 191d_open_t noopen; 192d_close_t noclose; 193d_read_t noread; 194d_write_t nowrite; 195d_ioctl_t noioctl; 196d_stop_t nostop; 197d_reset_t noreset; 198d_devtotty_t nodevtotty; 199d_mmap_t nommap; 200 201/* Bogus defines for compatibility. */ 202#define noioc noioctl 203#define nostrat nostrategy 204#define zerosize nopsize 205/* 206 * XXX d_strategy seems to be unused for cdevs that aren't associated with 207 * bdevs and called without checking for it being non-NULL for bdevs. 208 */ 209#define nostrategy ((d_strategy_t *)NULL) 210 211d_dump_t nodump; 212 213/* 214 * nopsize is little used, so not worth having dummy functions for. 215 */ 216#define nopsize ((d_psize_t *)NULL) 217 218d_open_t nullopen; 219d_close_t nullclose; 220#define nullstop nostop /* one void return is as good as another */ 221#define nullreset noreset /* one unused function is as good as another */ 222 223l_read_t l_noread; 224l_write_t l_nowrite; 225 226struct module; 227 228struct devsw_module_data { 229 int (*chainevh)(struct module *, int, void *); /* next handler */ 230 void *chainarg; /* arg for next event handler */ 231 int bdev; /* device major to use */ 232 int cdev; /* device major to use */ 233 struct cdevsw *cdevsw; /* device functions */ 234}; 235 236#define DEV_MODULE(name, cmaj, bmaj, devsw, evh, arg) \ 237static struct devsw_module_data name##_devsw_mod = { \ 238 evh, arg, bmaj == NODEV ? NODEV : makedev(bmaj, 0), \ 239 cmaj == NODEV ? NODEV : makedev(cmaj, 0), &devsw \ 240}; \ 241 \ 242static moduledata_t name##_mod = { \ 243 #name, \ 244 devsw_module_handler, \ 245 &name##_devsw_mod \ 246}; \ 247DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+cmaj*256+bmaj) 248 249int devsw_module_handler __P((struct module *mod, int what, void *arg)); 250 251int cdevsw_add __P((dev_t *descrip,struct cdevsw *new,struct cdevsw **old)); 252void cdevsw_add_generic __P((int bdev, int cdev, struct cdevsw *cdevsw)); 253dev_t chrtoblk __P((dev_t dev)); 254int iskmemdev __P((dev_t dev)); 255int iszerodev __P((dev_t dev)); 256void setconf __P((void)); 257#endif /* KERNEL */ 258 259#endif /* !_SYS_CONF_H_ */ 260