1/* $NetBSD: conf.h,v 1.151 2016/12/17 03:46:52 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/queue.h>
47#include <sys/device_if.h>
48
49struct buf;
50struct knote;
51struct lwp;
52struct tty;
53struct uio;
54struct vnode;
55
56/*
57 * Types for d_flag
58 */
59#define D_OTHER 0x0000
60#define D_TAPE 0x0001
61#define D_DISK 0x0002
62#define D_TTY 0x0003
63#define D_TYPEMASK 0x00ff
64#define D_MPSAFE 0x0100
65#define D_NEGOFFSAFE 0x0200
66#define D_MCLOSE 0x0400
67
68/*
69 * Block device switch table
70 */
71struct bdevsw {
72 int (*d_open)(dev_t, int, int, struct lwp *);
73 int (*d_close)(dev_t, int, int, struct lwp *);
74 void (*d_strategy)(struct buf *);
75 int (*d_ioctl)(dev_t, u_long, void *, int, struct lwp *);
76 int (*d_dump)(dev_t, daddr_t, void *, size_t);
77 int (*d_psize)(dev_t);
78 int (*d_discard)(dev_t, off_t, off_t);
79 int d_flag;
80};
81
82/*
83 * Character device switch table
84 */
85struct cdevsw {
86 int (*d_open)(dev_t, int, int, struct lwp *);
87 int (*d_close)(dev_t, int, int, struct lwp *);
88 int (*d_read)(dev_t, struct uio *, int);
89 int (*d_write)(dev_t, struct uio *, int);
90 int (*d_ioctl)(dev_t, u_long, void *, int, struct lwp *);
91 void (*d_stop)(struct tty *, int);
92 struct tty * (*d_tty)(dev_t);
93 int (*d_poll)(dev_t, int, struct lwp *);
94 paddr_t (*d_mmap)(dev_t, off_t, int);
95 int (*d_kqfilter)(dev_t, struct knote *);
96 int (*d_discard)(dev_t, off_t, off_t);
97 int d_flag;
98};
99
100#ifdef _KERNEL
101
102#include <sys/mutex.h>
103extern kmutex_t device_lock;
104
105int devsw_attach(const char *, const struct bdevsw *, devmajor_t *,
106 const struct cdevsw *, devmajor_t *);
107int devsw_detach(const struct bdevsw *, const struct cdevsw *);
108const struct bdevsw *bdevsw_lookup(dev_t);
109const struct cdevsw *cdevsw_lookup(dev_t);
110devmajor_t bdevsw_lookup_major(const struct bdevsw *);
111devmajor_t cdevsw_lookup_major(const struct cdevsw *);
112
113#define dev_type_open(n) int n (dev_t, int, int, struct lwp *)
114#define dev_type_close(n) int n (dev_t, int, int, struct lwp *)
115#define dev_type_read(n) int n (dev_t, struct uio *, int)
116#define dev_type_write(n) int n (dev_t, struct uio *, int)
117#define dev_type_ioctl(n) \
118 int n (dev_t, u_long, void *, int, struct lwp *)
119#define dev_type_stop(n) void n (struct tty *, int)
120#define dev_type_tty(n) struct tty * n (dev_t)
121#define dev_type_poll(n) int n (dev_t, int, struct lwp *)
122#define dev_type_mmap(n) paddr_t n (dev_t, off_t, int)
123#define dev_type_strategy(n) void n (struct buf *)
124#define dev_type_dump(n) int n (dev_t, daddr_t, void *, size_t)
125#define dev_type_size(n) int n (dev_t)
126#define dev_type_kqfilter(n) int n (dev_t, struct knote *)
127#define dev_type_discard(n) int n (dev_t, off_t, off_t)
128
129#define noopen ((dev_type_open((*)))enodev)
130#define noclose ((dev_type_close((*)))enodev)
131#define noread ((dev_type_read((*)))enodev)
132#define nowrite ((dev_type_write((*)))enodev)
133#define noioctl ((dev_type_ioctl((*)))enodev)
134#define nostop ((dev_type_stop((*)))enodev)
135#define notty NULL
136#define nopoll seltrue
137paddr_t nommap(dev_t, off_t, int);
138#define nodump ((dev_type_dump((*)))enodev)
139#define nosize NULL
140#define nokqfilter seltrue_kqfilter
141#define nodiscard ((dev_type_discard((*)))enodev)
142
143#define nullopen ((dev_type_open((*)))nullop)
144#define nullclose ((dev_type_close((*)))nullop)
145#define nullread ((dev_type_read((*)))nullop)
146#define nullwrite ((dev_type_write((*)))nullop)
147#define nullioctl ((dev_type_ioctl((*)))nullop)
148#define nullstop ((dev_type_stop((*)))nullop)
149#define nullpoll ((dev_type_poll((*)))nullop)
150#define nulldump ((dev_type_dump((*)))nullop)
151#define nullkqfilter ((dev_type_kqfilter((*)))eopnotsupp)
152#define nulldiscard ((dev_type_discard((*)))nullop)
153
154/* device access wrappers. */
155
156dev_type_open(bdev_open);
157dev_type_close(bdev_close);
158dev_type_strategy(bdev_strategy);
159dev_type_ioctl(bdev_ioctl);
160dev_type_dump(bdev_dump);
161dev_type_size(bdev_size);
162dev_type_discard(bdev_discard);
163
164dev_type_open(cdev_open);
165dev_type_close(cdev_close);
166dev_type_read(cdev_read);
167dev_type_write(cdev_write);
168dev_type_ioctl(cdev_ioctl);
169dev_type_stop(cdev_stop);
170dev_type_tty(cdev_tty);
171dev_type_poll(cdev_poll);
172dev_type_mmap(cdev_mmap);
173dev_type_kqfilter(cdev_kqfilter);
174dev_type_discard(cdev_discard);
175
176int cdev_type(dev_t);
177int cdev_flags(dev_t);
178int bdev_type(dev_t);
179int bdev_flags(dev_t);
180
181/* symbolic sleep message strings */
182extern const char devopn[], devio[], devwait[], devin[], devout[];
183extern const char devioc[], devcls[];
184
185#endif /* _KERNEL */
186
187/*
188 * Line discipline switch table
189 */
190struct linesw {
191 const char *l_name; /* Linesw name */
192
193 LIST_ENTRY(linesw) l_list;
194 u_int l_refcnt; /* locked by ttyldisc_list_slock */
195 int l_no; /* legacy discipline number (for TIOCGETD) */
196
197 int (*l_open) (dev_t, struct tty *);
198 int (*l_close) (struct tty *, int);
199 int (*l_read) (struct tty *, struct uio *, int);
200 int (*l_write) (struct tty *, struct uio *, int);
201 int (*l_ioctl) (struct tty *, u_long, void *, int,
202 struct lwp *);
203 int (*l_rint) (int, struct tty *);
204 int (*l_start) (struct tty *);
205 int (*l_modem) (struct tty *, int);
206 int (*l_poll) (struct tty *, int, struct lwp *);
207};
208
209#ifdef _KERNEL
210void ttyldisc_init(void);
211int ttyldisc_attach(struct linesw *);
212int ttyldisc_detach(struct linesw *);
213struct linesw *ttyldisc_lookup(const char *);
214struct linesw *ttyldisc_lookup_bynum(int);
215struct linesw *ttyldisc_default(void);
216void ttyldisc_release(struct linesw *);
217
218/* For those defining their own line disciplines: */
219#define ttynodisc ((int (*)(dev_t, struct tty *))enodev)
220#define ttyerrclose ((int (*)(struct tty *, int))enodev)
221#define ttyerrio ((int (*)(struct tty *, struct uio *, int))enodev)
222#define ttyerrinput ((int (*)(int, struct tty *))enodev)
223#define ttyerrstart ((int (*)(struct tty *))enodev)
224
225int ttyerrpoll (struct tty *, int, struct lwp *);
226int ttynullioctl(struct tty *, u_long, void *, int, struct lwp *);
227
228int iskmemdev(dev_t);
229int seltrue_kqfilter(dev_t, struct knote *);
230#endif
231
232#ifdef _KERNEL
233
234#define DEV_MEM 0 /* minor device 0 is physical memory */
235#define DEV_KMEM 1 /* minor device 1 is kernel memory */
236#define DEV_NULL 2 /* minor device 2 is EOF/rathole */
237#ifdef COMPAT_16
238#define _DEV_ZERO_oARM 3 /* reserved: old ARM /dev/zero minor */
239#endif
240#define DEV_FULL 11 /* minor device 11 is '\0'/ENOSPC */
241#define DEV_ZERO 12 /* minor device 12 is '\0'/rathole */
242
243enum devnode_class {
244 DEVNODE_DONTBOTHER,
245 DEVNODE_SINGLE,
246 DEVNODE_VECTOR,
247};
248#define DEVNODE_FLAG_LINKZERO 0x01 /* create name -> name0 link */
249#define DEVNODE_FLAG_ISMINOR0 0x02 /* vector[0] specifies minor */
250#ifdef notyet
251#define DEVNODE_FLAG_ISMINOR1 0x04 /* vector[1] specifies starting minor */
252#endif
253
254struct devsw_conv {
255 const char *d_name;
256 devmajor_t d_bmajor;
257 devmajor_t d_cmajor;
258
259 /* information about /dev nodes related to the device */
260 enum devnode_class d_class;
261 int d_flags;
262 int d_vectdim[2];
263};
264
265void devsw_init(void);
266const char *devsw_blk2name(devmajor_t);
267const char *cdevsw_getname(devmajor_t);
268const char *bdevsw_getname(devmajor_t);
269devmajor_t devsw_name2blk(const char *, char *, size_t);
270devmajor_t devsw_name2chr(const char *, char *, size_t);
271dev_t devsw_chr2blk(dev_t);
272dev_t devsw_blk2chr(dev_t);
273
274void mm_init(void);
275#endif /* _KERNEL */
276
277#ifdef _KERNEL
278void setroot(device_t, int);
279void rootconf(void);
280void swapconf(void);
281#endif /* _KERNEL */
282
283#endif /* !_SYS_CONF_H_ */
284