1/* $NetBSD: conf.h,v 1.146 2016/01/17 23:16:46 christos 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
67/*
68 * Block device switch table
69 */
70struct bdevsw {
71 int (*d_open)(dev_t, int, int, struct lwp *);
72 int (*d_close)(dev_t, int, int, struct lwp *);
73 void (*d_strategy)(struct buf *);
74 int (*d_ioctl)(dev_t, u_long, void *, int, struct lwp *);
75 int (*d_dump)(dev_t, daddr_t, void *, size_t);
76 int (*d_psize)(dev_t);
77 int (*d_discard)(dev_t, off_t, off_t);
78 int d_flag;
79};
80
81/*
82 * Character device switch table
83 */
84struct cdevsw {
85 int (*d_open)(dev_t, int, int, struct lwp *);
86 int (*d_close)(dev_t, int, int, struct lwp *);
87 int (*d_read)(dev_t, struct uio *, int);
88 int (*d_write)(dev_t, struct uio *, int);
89 int (*d_ioctl)(dev_t, u_long, void *, int, struct lwp *);
90 void (*d_stop)(struct tty *, int);
91 struct tty * (*d_tty)(dev_t);
92 int (*d_poll)(dev_t, int, struct lwp *);
93 paddr_t (*d_mmap)(dev_t, off_t, int);
94 int (*d_kqfilter)(dev_t, struct knote *);
95 int (*d_discard)(dev_t, off_t, off_t);
96 int d_flag;
97};
98
99#ifdef _KERNEL
100
101#include <sys/mutex.h>
102extern kmutex_t device_lock;
103
104int devsw_attach(const char *, const struct bdevsw *, devmajor_t *,
105 const struct cdevsw *, devmajor_t *);
106int devsw_detach(const struct bdevsw *, const struct cdevsw *);
107const struct bdevsw *bdevsw_lookup(dev_t);
108const struct cdevsw *cdevsw_lookup(dev_t);
109devmajor_t bdevsw_lookup_major(const struct bdevsw *);
110devmajor_t cdevsw_lookup_major(const struct cdevsw *);
111
112#define dev_type_open(n) int n (dev_t, int, int, struct lwp *)
113#define dev_type_close(n) int n (dev_t, int, int, struct lwp *)
114#define dev_type_read(n) int n (dev_t, struct uio *, int)
115#define dev_type_write(n) int n (dev_t, struct uio *, int)
116#define dev_type_ioctl(n) \
117 int n (dev_t, u_long, void *, int, struct lwp *)
118#define dev_type_stop(n) void n (struct tty *, int)
119#define dev_type_tty(n) struct tty * n (dev_t)
120#define dev_type_poll(n) int n (dev_t, int, struct lwp *)
121#define dev_type_mmap(n) paddr_t n (dev_t, off_t, int)
122#define dev_type_strategy(n) void n (struct buf *)
123#define dev_type_dump(n) int n (dev_t, daddr_t, void *, size_t)
124#define dev_type_size(n) int n (dev_t)
125#define dev_type_kqfilter(n) int n (dev_t, struct knote *)
126#define dev_type_discard(n) int n (dev_t, off_t, off_t)
127
128#define noopen ((dev_type_open((*)))enodev)
129#define noclose ((dev_type_close((*)))enodev)
130#define noread ((dev_type_read((*)))enodev)
131#define nowrite ((dev_type_write((*)))enodev)
132#define noioctl ((dev_type_ioctl((*)))enodev)
133#define nostop ((dev_type_stop((*)))enodev)
134#define notty NULL
135#define nopoll seltrue
136#define nommap ((dev_type_mmap((*)))enodev)
137#define nodump ((dev_type_dump((*)))enodev)
138#define nosize NULL
139#define nokqfilter seltrue_kqfilter
140#define nodiscard ((dev_type_discard((*)))enodev)
141
142#define nullopen ((dev_type_open((*)))nullop)
143#define nullclose ((dev_type_close((*)))nullop)
144#define nullread ((dev_type_read((*)))nullop)
145#define nullwrite ((dev_type_write((*)))nullop)
146#define nullioctl ((dev_type_ioctl((*)))nullop)
147#define nullstop ((dev_type_stop((*)))nullop)
148#define nullpoll ((dev_type_poll((*)))nullop)
149#define nullmmap ((dev_type_mmap((*)))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 bdev_type(dev_t);
178
179/* symbolic sleep message strings */
180extern const char devopn[], devio[], devwait[], devin[], devout[];
181extern const char devioc[], devcls[];
182
183#endif /* _KERNEL */
184
185/*
186 * Line discipline switch table
187 */
188struct linesw {
189 const char *l_name; /* Linesw name */
190
191 LIST_ENTRY(linesw) l_list;
192 u_int l_refcnt; /* locked by ttyldisc_list_slock */
193 int l_no; /* legacy discipline number (for TIOCGETD) */
194
195 int (*l_open) (dev_t, struct tty *);
196 int (*l_close) (struct tty *, int);
197 int (*l_read) (struct tty *, struct uio *, int);
198 int (*l_write) (struct tty *, struct uio *, int);
199 int (*l_ioctl) (struct tty *, u_long, void *, int,
200 struct lwp *);
201 int (*l_rint) (int, struct tty *);
202 int (*l_start) (struct tty *);
203 int (*l_modem) (struct tty *, int);
204 int (*l_poll) (struct tty *, int, struct lwp *);
205};
206
207#ifdef _KERNEL
208void ttyldisc_init(void);
209int ttyldisc_attach(struct linesw *);
210int ttyldisc_detach(struct linesw *);
211struct linesw *ttyldisc_lookup(const char *);
212struct linesw *ttyldisc_lookup_bynum(int);
213struct linesw *ttyldisc_default(void);
214void ttyldisc_release(struct linesw *);
215
216/* For those defining their own line disciplines: */
217#define ttynodisc ((int (*)(dev_t, struct tty *))enodev)
218#define ttyerrclose ((int (*)(struct tty *, int))enodev)
219#define ttyerrio ((int (*)(struct tty *, struct uio *, int))enodev)
220#define ttyerrinput ((int (*)(int, struct tty *))enodev)
221#define ttyerrstart ((int (*)(struct tty *))enodev)
222
223int ttyerrpoll (struct tty *, int, struct lwp *);
224int ttynullioctl(struct tty *, u_long, void *, int, struct lwp *);
225
226int iskmemdev(dev_t);
227int seltrue_kqfilter(dev_t, struct knote *);
228#endif
229
230#ifdef _KERNEL
231
232#define DEV_MEM 0 /* minor device 0 is physical memory */
233#define DEV_KMEM 1 /* minor device 1 is kernel memory */
234#define DEV_NULL 2 /* minor device 2 is EOF/rathole */
235#ifdef COMPAT_16
236#define _DEV_ZERO_oARM 3 /* reserved: old ARM /dev/zero minor */
237#endif
238#define DEV_FULL 11 /* minor device 11 is '\0'/ENOSPC */
239#define DEV_ZERO 12 /* minor device 12 is '\0'/rathole */
240
241enum devnode_class {
242 DEVNODE_DONTBOTHER,
243 DEVNODE_SINGLE,
244 DEVNODE_VECTOR,
245};
246#define DEVNODE_FLAG_LINKZERO 0x01 /* create name -> name0 link */
247#define DEVNODE_FLAG_ISMINOR0 0x02 /* vector[0] specifies minor */
248#ifdef notyet
249#define DEVNODE_FLAG_ISMINOR1 0x04 /* vector[1] specifies starting minor */
250#endif
251
252struct devsw_conv {
253 const char *d_name;
254 devmajor_t d_bmajor;
255 devmajor_t d_cmajor;
256
257 /* information about /dev nodes related to the device */
258 enum devnode_class d_class;
259 int d_flags;
260 int d_vectdim[2];
261};
262
263void devsw_init(void);
264const char *devsw_blk2name(devmajor_t);
265const char *cdevsw_getname(devmajor_t);
266const char *bdevsw_getname(devmajor_t);
267devmajor_t devsw_name2blk(const char *, char *, size_t);
268devmajor_t devsw_name2chr(const char *, char *, size_t);
269dev_t devsw_chr2blk(dev_t);
270dev_t devsw_blk2chr(dev_t);
271
272void mm_init(void);
273#endif /* _KERNEL */
274
275#ifdef _KERNEL
276void setroot(device_t, int);
277void rootconf(void);
278void swapconf(void);
279#endif /* _KERNEL */
280
281#endif /* !_SYS_CONF_H_ */
282