conf.h revision 38862
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 1.44 1998/08/20 06:10:42 bde 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 tty; 52struct uio; 53struct vnode; 54 55typedef int d_open_t __P((dev_t dev, int oflags, int devtype, struct proc *p)); 56typedef int d_close_t __P((dev_t dev, int fflag, int devtype, struct proc *p)); 57typedef void d_strategy_t __P((struct buf *bp)); 58typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data, 59 int fflag, struct proc *p)); 60typedef int d_dump_t __P((dev_t dev)); 61typedef int d_psize_t __P((dev_t dev)); 62 63typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag)); 64typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag)); 65typedef void d_stop_t __P((struct tty *tp, int rw)); 66typedef int d_reset_t __P((dev_t dev)); 67typedef struct tty *d_devtotty_t __P((dev_t dev)); 68typedef int d_poll_t __P((dev_t dev, int events, struct proc *p)); 69typedef int d_mmap_t __P((dev_t dev, int offset, int nprot)); 70 71typedef int l_open_t __P((dev_t dev, struct tty *tp)); 72typedef int l_close_t __P((struct tty *tp, int flag)); 73typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag)); 74typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag)); 75typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data, 76 int flag, struct proc *p)); 77typedef int l_rint_t __P((int c, struct tty *tp)); 78typedef int l_start_t __P((struct tty *tp)); 79typedef int l_modem_t __P((struct tty *tp, int flag)); 80 81/* 82 * Types for d_type. 83 */ 84#define D_TAPE 1 85#define D_DISK 2 86#define D_TTY 3 87 88#define D_TYPEMASK 0xffff 89 90/* 91 * Flags for d_flags. 92 */ 93#define D_NOCLUSTERR 0x10000 /* disables cluter read */ 94#define D_NOCLUSTERW 0x20000 /* disables cluster write */ 95#define D_NOCLUSTERRW (D_NOCLUSTERR | D_NOCLUSTERW) 96#define D_CANFREE 0x40000 /* can free blocks */ 97 98 99/* 100 * Character device switch table 101 */ 102struct cdevsw { 103 d_open_t *d_open; 104 d_close_t *d_close; 105 d_read_t *d_read; 106 d_write_t *d_write; 107 d_ioctl_t *d_ioctl; 108 d_stop_t *d_stop; 109 d_reset_t *d_reset; /* XXX not used */ 110 d_devtotty_t *d_devtotty; 111 d_poll_t *d_poll; 112 d_mmap_t *d_mmap; 113 d_strategy_t *d_strategy; 114 char *d_name; /* see above */ 115 void *d_spare; 116 int d_maj; 117 d_dump_t *d_dump; 118 d_psize_t *d_psize; 119 u_int d_flags; 120 int d_maxio; 121 int d_bmaj; 122}; 123 124#ifdef KERNEL 125extern struct cdevsw *bdevsw[]; 126extern struct cdevsw *cdevsw[]; 127#endif 128 129/* 130 * Line discipline switch table 131 */ 132struct linesw { 133 l_open_t *l_open; 134 l_close_t *l_close; 135 l_read_t *l_read; 136 l_write_t *l_write; 137 l_ioctl_t *l_ioctl; 138 l_rint_t *l_rint; 139 l_start_t *l_start; 140 l_modem_t *l_modem; 141 u_char l_hotchar; 142}; 143 144#ifdef KERNEL 145extern struct linesw linesw[]; 146extern int nlinesw; 147 148int ldisc_register __P((int , struct linesw *)); 149void ldisc_deregister __P((int)); 150#define LDISC_LOAD -1 /* Loadable line discipline */ 151#endif 152 153/* 154 * Swap device table 155 */ 156struct swdevt { 157 dev_t sw_dev; 158 int sw_flags; 159 int sw_nblks; 160 struct vnode *sw_vp; 161}; 162#define SW_FREED 0x01 163#define SW_SEQUENTIAL 0x02 164#define sw_freed sw_flags /* XXX compat */ 165 166#ifdef KERNEL 167d_open_t noopen; 168d_close_t noclose; 169d_read_t noread; 170d_write_t nowrite; 171d_ioctl_t noioctl; 172d_stop_t nostop; 173d_reset_t noreset; 174d_devtotty_t nodevtotty; 175d_mmap_t nommap; 176 177/* Bogus defines for compatibility. */ 178#define noioc noioctl 179#define nostrat nostrategy 180#define zerosize nopsize 181/* 182 * XXX d_strategy seems to be unused for cdevs that aren't associated with 183 * bdevs and called without checking for it being non-NULL for bdevs. 184 */ 185#define nostrategy ((d_strategy_t *)NULL) 186 187d_dump_t nodump; 188 189/* 190 * nopsize is little used, so not worth having dummy functions for. 191 */ 192#define nopsize ((d_psize_t *)NULL) 193 194d_open_t nullopen; 195d_close_t nullclose; 196#define nullstop nostop /* one void return is as good as another */ 197#define nullreset noreset /* one unused function is as good as another */ 198 199l_read_t l_noread; 200l_write_t l_nowrite; 201 202/* 203 * XXX This is ugly. 204 */ 205#ifdef _SYS_MODULE_H_ 206 207struct cdevsw_module_data { 208 modeventhand_t chainevh; /* next event handler in chain */ 209 void* chainarg; /* arg for next event handler */ 210 dev_t dev; /* device major to use */ 211 struct cdevsw* cdevsw; /* device functions */ 212}; 213 214struct bdevsw_module_data { 215 modeventhand_t chainevh; /* next event handler in chain */ 216 void* chainarg; /* arg for next event handler */ 217 int bdev; /* device major to use */ 218 int cdev; /* device major to use */ 219 struct cdevsw* cdevsw; /* device functions */ 220}; 221 222#define CDEV_MODULE(name, major, devsw, evh, arg) \ 223static struct cdevsw_module_data name##_cdevsw_mod = { \ 224 evh, arg, makedev(major, 0), &devsw \ 225}; \ 226 \ 227static moduledata_t name##_mod = { \ 228 #name, \ 229 cdevsw_module_handler, \ 230 &name##_cdevsw_mod \ 231}; \ 232DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+major) 233 234#define BDEV_MODULE(name, bdev, cdev, devsw, evh, arg) \ 235static struct bdevsw_module_data name##_bdevsw_mod = { \ 236 evh, arg, makedev(bdev, 0), makedev(cdev, 0), &devsw \ 237}; \ 238 \ 239static moduledata_t name##_mod = { \ 240 #name, \ 241 bdevsw_module_handler, \ 242 &name##_bdevsw_mod \ 243}; \ 244DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+cdev) 245 246int cdevsw_module_handler __P((module_t mod, modeventtype_t what, void* arg)); 247int bdevsw_module_handler __P((module_t mod, modeventtype_t what, void* arg)); 248 249#endif /* _SYS_MODULE_H_ */ 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