2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Poul-Henning Kamp. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)conf.h 8.5 (Berkeley) 1/9/95
44 #include <sys/eventhandler.h>
46 #include <sys/queue.h>
57 #define SI_ALIAS 0x0002 /* carrier of alias name */
58 #define SI_NAMED 0x0004 /* make_dev{_alias} has been called */
59 #define SI_CHEAPCLONE 0x0008 /* can be removed_dev'ed when vnode reclaims */
60 #define SI_CHILD 0x0010 /* child of another struct cdev **/
61 #define SI_DEVOPEN 0x0020 /* opened by device */
62 #define SI_CONSOPEN 0x0040 /* opened by console */
63 #define SI_DUMPDEV 0x0080 /* is kernel dumpdev */
64 #define SI_CANDELETE 0x0100 /* can do BIO_DELETE */
65 #define SI_CLONELIST 0x0200 /* on a clone list */
66 struct timespec si_atime;
67 struct timespec si_ctime;
68 struct timespec si_mtime;
71 LIST_ENTRY(cdev) si_list;
72 LIST_ENTRY(cdev) si_clone;
73 LIST_ENTRY(cdev) si_hash;
74 SLIST_HEAD(, vnode) si_hlist;
75 LIST_HEAD(, cdev) si_children;
76 LIST_ENTRY(cdev) si_siblings;
77 struct cdev *si_parent;
80 void *si_drv1, *si_drv2;
81 struct cdevsw *si_devsw;
82 int si_iosize_max; /* maximum I/O size (for physio &al) */
87 u_long si_threadcount;
90 struct tty *__sit_tty;
93 struct mount *__sid_mountpoint;
94 int __sid_bsize_phys; /* min physical block size */
95 struct snapdata *__sid_snapdata;
98 char __si_namebuf[SPECNAMELEN + 1];
101 #define si_tty __si_u.__si_tty.__sit_tty
102 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint
103 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
104 #define si_snapdata __si_u.__si_disk.__sid_snapdata
109 * Definitions of device driver entry switches
120 * Note: d_thread_t is provided as a transition aid for those drivers
121 * that treat struct proc/struct thread as an opaque data type and
122 * exist in substantially the same form in both 4.x and 5.x. Writers
123 * of drivers that dips into the d_thread_t structure should use
124 * struct thread or struct proc as appropriate for the version of the
125 * OS they are using. It is provided in lieu of each device driver
126 * inventing its own way of doing this. While it does violate style(9)
127 * in a number of ways, this violation is deemed to be less
128 * important than the benefits that a uniform API between releases
131 * Users of struct thread/struct proc that aren't device drivers should
132 * not use d_thread_t.
135 typedef struct thread d_thread_t;
137 typedef int d_open_t(struct cdev *dev, int oflags, int devtype, struct thread *td);
138 typedef int d_fdopen_t(struct cdev *dev, int oflags, struct thread *td, int fdidx);
139 typedef int d_close_t(struct cdev *dev, int fflag, int devtype, struct thread *td);
140 typedef void d_strategy_t(struct bio *bp);
141 typedef int d_ioctl_t(struct cdev *dev, u_long cmd, caddr_t data,
142 int fflag, struct thread *td);
144 typedef int d_read_t(struct cdev *dev, struct uio *uio, int ioflag);
145 typedef int d_write_t(struct cdev *dev, struct uio *uio, int ioflag);
146 typedef int d_poll_t(struct cdev *dev, int events, struct thread *td);
147 typedef int d_kqfilter_t(struct cdev *dev, struct knote *kn);
148 typedef int d_mmap_t(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr,
150 typedef void d_purge_t(struct cdev *dev);
152 typedef int d_spare2_t(struct cdev *dev);
154 typedef int dumper_t(
155 void *priv, /* Private to the driver. */
156 void *virtual, /* Virtual (mapped) address. */
157 vm_offset_t physical, /* Physical address of virtual. */
158 off_t offset, /* Byte-offset to write at. */
159 size_t length); /* Number of bytes to dump. */
166 #define D_TAPE 0x0001
167 #define D_DISK 0x0002
173 #define D_TYPEMASK 0xffff
176 * Flags for d_flags which the drivers can set.
178 #define D_MEMDISK 0x00010000 /* memory type disk */
179 #define D_TRACKCLOSE 0x00080000 /* track all closes */
180 #define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */
181 #define D_PSEUDO 0x00200000 /* make_dev() can return NULL */
182 #define D_NEEDGIANT 0x00400000 /* driver want Giant */
187 #define D_VERSION_00 0x20011966
188 #define D_VERSION D_VERSION_00
191 * Flags used for internal housekeeping
193 #define D_INIT 0x80000000 /* cdevsw initialized */
194 #define D_ALLOCMAJ 0x40000000 /* major# is allocated */
197 * Character device switch table
205 d_fdopen_t *d_fdopen;
212 d_strategy_t *d_strategy;
214 d_kqfilter_t *d_kqfilter;
216 d_spare2_t *d_spare2;
218 /* These fields should not be messed with by drivers */
219 LIST_ENTRY(cdevsw) d_list;
220 LIST_HEAD(, cdev) d_devs;
228 #define NUMCDEVSW 256
231 * XXX: do not use MAJOR_AUTO unless you have no choice. In general drivers
232 * should just not initialize .d_maj and that will DTRT.
234 #define MAJOR_AUTO 0 /* XXX: Not GM */
238 struct devsw_module_data {
239 int (*chainevh)(struct module *, int, void *); /* next handler */
240 void *chainarg; /* arg for next event handler */
241 /* Do not initialize fields hereafter */
244 #define DEV_MODULE(name, evh, arg) \
245 static moduledata_t name##_mod = { \
250 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
253 void clone_setup(struct clonedevs **cdp);
254 void clone_cleanup(struct clonedevs **);
255 #define CLONE_UNITMASK 0xfffff
256 #define CLONE_FLAG0 (CLONE_UNITMASK + 1)
257 int clone_create(struct clonedevs **, struct cdevsw *, int *unit, struct cdev **dev, u_int extra);
259 int count_dev(struct cdev *_dev);
260 void destroy_dev(struct cdev *_dev);
261 struct cdevsw *dev_refthread(struct cdev *_dev);
262 void dev_relthread(struct cdev *_dev);
263 const char *devtoname(struct cdev *_dev);
264 int dev_named(struct cdev *_pdev, const char *_name);
265 void dev_depends(struct cdev *_pdev, struct cdev *_cdev);
266 void dev_ref(struct cdev *dev);
267 void dev_rel(struct vnode *vp);
268 void dev_strategy(struct buf *bp);
269 struct cdev *makebdev(int _maj, int _min);
270 struct cdev *make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid,
271 int _perms, const char *_fmt, ...) __printflike(6, 7);
272 struct cdev *make_dev_alias(struct cdev *_pdev, const char *_fmt, ...) __printflike(2, 3);
273 int dev2unit(struct cdev *_dev);
275 void dev_unlock(void);
276 int unit2minor(int _unit);
278 struct cdev *getdiskbyname(char *_name);
280 void devfs_create(struct cdev *dev);
281 void devfs_destroy(struct cdev *dev);
289 #define GID_OPERATOR 5
292 #define GID_DIALER 68
294 typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, struct cdev **result);
296 int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit);
297 EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
299 /* Stuff relating to kernel-dump */
302 dumper_t *dumper; /* Dumping function. */
303 void *priv; /* Private parts. */
304 u_int blocksize; /* Size of block in bytes. */
305 off_t mediaoffset; /* Initial offset in bytes. */
306 off_t mediasize; /* Space available in bytes. */
309 int set_dumper(struct dumperinfo *);
310 void dumpsys(struct dumperinfo *);
311 extern int dumping; /* system is dumping */
313 /* D_TTY related functions */
316 d_kqfilter_t ttykqfilter;
324 #endif /* !_SYS_CONF_H_ */