1/* $NetBSD: conf.h,v 1.162 2024/04/17 18:01:29 riastradh Exp $ */
2
3/*-
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. 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.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
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 * 3. 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.
23 *
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
34 * SUCH DAMAGE.
35 *
36 * @(#)conf.h 8.5 (Berkeley) 1/9/95
37 */
38
39#ifndef _SYS_CONF_H_
40#define _SYS_CONF_H_
41
42/*
43 * Definitions of device driver entry switches
44 */
45
46#include <sys/device_if.h>
47#include <sys/queue.h>
48#include <sys/types.h>
49
50struct buf;
51struct knote;
52struct lwp;
53struct tty;
54struct uio;
55struct vnode;
56
57/*
58 * Types for d_flag
59 */
60#define D_OTHER 0x0000
61#define D_TAPE 0x0001
62#define D_DISK 0x0002
63#define D_TTY 0x0003
64#define D_TYPEMASK 0x00ff
65#define D_MPSAFE 0x0100
66#define D_NEGOFFSAFE 0x0200
67#define D_UNUSED0 0x0400 /* was D_MCLOSE */
68
69/*
70 * Block device switch table
71 */
72struct bdevsw {
73 int (*d_open)(dev_t, int, int, struct lwp *);
74 int (*d_cancel)(dev_t, int, int, struct lwp *);
75 int (*d_close)(dev_t, int, int, struct lwp *);
76 void (*d_strategy)(struct buf *);
77 int (*d_ioctl)(dev_t, u_long, void *, int, struct lwp *);
78 int (*d_dump)(dev_t, daddr_t, void *, size_t);
79 int (*d_psize)(dev_t);
80 int (*d_discard)(dev_t, off_t, off_t);
81 int (*d_devtounit)(dev_t);
82 struct cfdriver *d_cfdriver;
83 int d_flag;
84};
85
86/*
87 * Character device switch table
88 */
89struct cdevsw {
90 int (*d_open)(dev_t, int, int, struct lwp *);
91 int (*d_cancel)(dev_t, int, int, struct lwp *);
92 int (*d_close)(dev_t, int, int, struct lwp *);
93 int (*d_read)(dev_t, struct uio *, int);
94 int (*d_write)(dev_t, struct uio *, int);
95 int (*d_ioctl)(dev_t, u_long, void *, int, struct lwp *);
96 void (*d_stop)(struct tty *, int);
97 struct tty * (*d_tty)(dev_t);
98 int (*d_poll)(dev_t, int, struct lwp *);
99 paddr_t (*d_mmap)(dev_t, off_t, int);
100 int (*d_kqfilter)(dev_t, struct knote *);
101 int (*d_discard)(dev_t, off_t, off_t);
102 int (*d_devtounit)(dev_t);
103 struct cfdriver *d_cfdriver;
104 int d_flag;
105};
106
107#ifdef _KERNEL
108
109#include <sys/mutex.h>
110extern kmutex_t device_lock;
111
112int devsw_attach(const char *, const struct bdevsw *, devmajor_t *,
113 const struct cdevsw *, devmajor_t *);
114void devsw_detach(const struct bdevsw *, const struct cdevsw *);
115const struct bdevsw *bdevsw_lookup(dev_t);
116const struct cdevsw *cdevsw_lookup(dev_t);
117devmajor_t bdevsw_lookup_major(const struct bdevsw *);
118devmajor_t cdevsw_lookup_major(const struct cdevsw *);
119
120typedef int dev_open_t(dev_t, int, int, struct lwp *);
121typedef int dev_cancel_t(dev_t, int, int, struct lwp *);
122typedef int dev_close_t(dev_t, int, int, struct lwp *);
123typedef int dev_read_t(dev_t, struct uio *, int);
124typedef int dev_write_t(dev_t, struct uio *, int);
125typedef int dev_ioctl_t(dev_t, u_long, void *, int, struct lwp *);
126typedef void dev_stop_t(struct tty *, int);
127typedef struct tty *dev_tty_t(dev_t);
128typedef int dev_poll_t(dev_t, int, struct lwp *);
129typedef paddr_t dev_mmap_t(dev_t, off_t, int);
130typedef void dev_strategy_t(struct buf *);
131typedef int dev_dump_t(dev_t, daddr_t, void *, size_t);
132typedef int dev_size_t(dev_t);
133typedef int dev_kqfilter_t(dev_t, struct knote *);
134typedef int dev_discard_t(dev_t, off_t, off_t);
135
136#define dev_type_open(n) dev_open_t n
137#define dev_type_cancel(n) dev_cancel_t n
138#define dev_type_close(n) dev_close_t n
139#define dev_type_read(n) dev_read_t n
140#define dev_type_write(n) dev_write_t n
141#define dev_type_ioctl(n) dev_ioctl_t n
142#define dev_type_stop(n) dev_stop_t n
143#define dev_type_tty(n) dev_tty_t n
144#define dev_type_poll(n) dev_poll_t n
145#define dev_type_mmap(n) dev_mmap_t n
146#define dev_type_strategy(n) dev_strategy_t n
147#define dev_type_dump(n) dev_dump_t n
148#define dev_type_size(n) dev_size_t n
149#define dev_type_kqfilter(n) dev_kqfilter_t n
150#define dev_type_discard(n) dev_discard_t n
151
152int devenodev(dev_t, ...);
153int deveopnotsupp(dev_t, ...);
154int devnullop(dev_t, ...);
155int ttyenodev(struct tty *, ...);
156void ttyvenodev(struct tty *, ...);
157void ttyvnullop(struct tty *, ...);
158
159#define noopen ((dev_open_t *)devenodev)
160#define noclose ((dev_close_t *)devenodev)
161#define noread ((dev_read_t *)devenodev)
162#define nowrite ((dev_write_t *)devenodev)
163#define noioctl ((dev_ioctl_t *)devenodev)
164#define nostop ((dev_stop_t *)ttyvenodev)
165#define notty NULL
166#define nopoll seltrue
167paddr_t nommap(dev_t, off_t, int);
168#define nodump ((dev_dump_t *)devenodev)
169#define nosize NULL
170#define nokqfilter seltrue_kqfilter
171#define nodiscard ((dev_discard_t *)devenodev)
172
173#define nullopen ((dev_open_t *)devnullop)
174#define nullclose ((dev_close_t *)devnullop)
175#define nullread ((dev_read_t *)devnullop)
176#define nullwrite ((dev_write_t *)devnullop)
177#define nullioctl ((dev_ioctl_t *)devnullop)
178#define nullstop ((dev_stop_t *)ttyvnullop)
179#define nullpoll ((dev_poll_t *)devnullop)
180#define nulldump ((dev_dump_t *)devnullop)
181#define nullkqfilter ((dev_kqfilter_t *)deveopnotsupp)
182#define nulldiscard ((dev_discard_t *)devnullop)
183
184/* device access wrappers. */
185
186dev_type_open(bdev_open);
187dev_type_cancel(bdev_cancel);
188dev_type_close(bdev_close);
189dev_type_strategy(bdev_strategy);
190dev_type_ioctl(bdev_ioctl);
191dev_type_dump(bdev_dump);
192dev_type_size(bdev_size);
193dev_type_discard(bdev_discard);
194
195void bdev_detached(dev_t);
196
197dev_type_open(cdev_open);
198dev_type_cancel(cdev_cancel);
199dev_type_close(cdev_close);
200dev_type_read(cdev_read);
201dev_type_write(cdev_write);
202dev_type_ioctl(cdev_ioctl);
203dev_type_stop(cdev_stop);
204dev_type_tty(cdev_tty);
205dev_type_poll(cdev_poll);
206dev_type_mmap(cdev_mmap);
207dev_type_kqfilter(cdev_kqfilter);
208dev_type_discard(cdev_discard);
209
210void cdev_detached(dev_t);
211
212int cdev_type(dev_t);
213int cdev_flags(dev_t);
214int bdev_type(dev_t);
215int bdev_flags(dev_t);
216
217/* symbolic sleep message strings */
218extern const char devopn[], devio[], devwait[], devin[], devout[];
219extern const char devioc[], devcls[];
220
221#endif /* _KERNEL */
222
223/*
224 * Line discipline switch table
225 */
226struct linesw {
227 const char *l_name; /* Linesw name */
228
229 LIST_ENTRY(linesw) l_list;
230 u_int l_refcnt; /* locked by ttyldisc_list_slock */
231 int l_no; /* legacy discipline number (for TIOCGETD) */
232
233 int (*l_open) (dev_t, struct tty *);
234 int (*l_close) (struct tty *, int);
235 int (*l_read) (struct tty *, struct uio *, int);
236 int (*l_write) (struct tty *, struct uio *, int);
237 int (*l_ioctl) (struct tty *, u_long, void *, int,
238 struct lwp *);
239 int (*l_rint) (int, struct tty *);
240 int (*l_start) (struct tty *);
241 int (*l_modem) (struct tty *, int);
242 int (*l_poll) (struct tty *, int, struct lwp *);
243};
244
245#ifdef _KERNEL
246void ttyldisc_init(void);
247int ttyldisc_attach(struct linesw *);
248int ttyldisc_detach(struct linesw *);
249struct linesw *ttyldisc_lookup(const char *);
250struct linesw *ttyldisc_lookup_bynum(int);
251struct linesw *ttyldisc_default(void);
252void ttyldisc_release(struct linesw *);
253
254/* For those defining their own line disciplines: */
255#define ttynodisc ((int (*)(dev_t, struct tty *))devenodev)
256#define ttyerrclose ((int (*)(struct tty *, int))ttyenodev)
257#define ttyerrio ((int (*)(struct tty *, struct uio *, int))ttyenodev)
258#define ttyerrstart ((int (*)(struct tty *))ttyenodev)
259
260int ttyerrpoll (struct tty *, int, struct lwp *);
261int ttynullioctl(struct tty *, u_long, void *, int, struct lwp *);
262
263int iskmemdev(dev_t);
264int seltrue_kqfilter(dev_t, struct knote *);
265#endif
266
267#ifdef _KERNEL
268
269#define DEV_MEM 0 /* minor device 0 is physical memory */
270#define DEV_KMEM 1 /* minor device 1 is kernel memory */
271#define DEV_NULL 2 /* minor device 2 is EOF/rathole */
272#ifdef COMPAT_16
273#define _DEV_ZERO_oARM 3 /* reserved: old ARM /dev/zero minor */
274#endif
275#define DEV_FULL 11 /* minor device 11 is '\0'/ENOSPC */
276#define DEV_ZERO 12 /* minor device 12 is '\0'/rathole */
277
278enum devnode_class {
279 DEVNODE_DONTBOTHER,
280 DEVNODE_SINGLE,
281 DEVNODE_VECTOR,
282};
283#define DEVNODE_FLAG_LINKZERO 0x01 /* create name -> name0 link */
284#define DEVNODE_FLAG_ISMINOR0 0x02 /* vector[0] specifies minor */
285#ifdef notyet
286#define DEVNODE_FLAG_ISMINOR1 0x04 /* vector[1] specifies starting minor */
287#endif
288
289struct devsw_conv {
290 const char *d_name;
291 devmajor_t d_bmajor;
292 devmajor_t d_cmajor;
293
294 /* information about /dev nodes related to the device */
295 enum devnode_class d_class;
296 int d_flags;
297 int d_vectdim[2];
298};
299
300void devsw_init(void);
301const char *devsw_blk2name(devmajor_t);
302const char *cdevsw_getname(devmajor_t);
303const char *bdevsw_getname(devmajor_t);
304devmajor_t devsw_name2blk(const char *, char *, size_t);
305devmajor_t devsw_name2chr(const char *, char *, size_t);
306dev_t devsw_chr2blk(dev_t);
307dev_t devsw_blk2chr(dev_t);
308int dev_minor_unit(dev_t);
309
310void mm_init(void);
311#endif /* _KERNEL */
312
313#ifdef _KERNEL
314void setroot(device_t, int);
315void rootconf(void);
316void swapconf(void);
317#endif /* _KERNEL */
318
319#endif /* !_SYS_CONF_H_ */