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1/*
2 * Copyright (c) 2000-2012 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
29/*-
30 * Copyright (c) 1990, 1993
31 * The Regents of the University of California. All rights reserved.
32 * (c) UNIX System Laboratories, Inc.
33 * All or some portions of this file are derived from material licensed
34 * to the University of California by American Telephone and Telegraph
35 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
36 * the permission of UNIX System Laboratories, Inc.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the University of
49 * California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * @(#)conf.h 8.5 (Berkeley) 1/9/95
67 */
68
69#ifndef _SYS_CONF_H_
70#define _SYS_CONF_H_ 1
71
72#include <sys/appleapiopts.h>
73#include <sys/cdefs.h>
74#include <sys/queue.h>
75#include <stdint.h>
76
77/*
78 * Definitions of device driver entry switches
79 */
80
81struct buf;
82struct proc;
83struct tty;
84struct uio;
85struct vnode;
86
87/*
88 * Types for d_type.
89 * These are returned by ioctl FIODTYPE
90 */
91#define D_TAPE 1
92#define D_DISK 2
93#define D_TTY 3
94
95#ifdef KERNEL
96/*
97 * Flags for d_type (squeezed into the top half of d_type).
98 */
99#define D_TYPEMASK 0xffff
100#define D_TRACKCLOSE 0x00010000 /* track all closes */
101
102/*
103 * Device switch function types.
104 */
105typedef int open_close_fcn_t(dev_t dev, int flags, int devtype,
106 struct proc *p);
107
108typedef struct tty *d_devtotty_t(dev_t dev);
109
110typedef void strategy_fcn_t(struct buf *bp);
111typedef int ioctl_fcn_t(dev_t dev, u_long cmd, caddr_t data,
112 int fflag, struct proc *p);
113typedef int dump_fcn_t(void); /* parameters vary by architecture */
114typedef int psize_fcn_t(dev_t dev);
115typedef int read_write_fcn_t(dev_t dev, struct uio *uio, int ioflag);
116typedef int stop_fcn_t(struct tty *tp, int rw);
117typedef int reset_fcn_t(int uban);
118typedef int select_fcn_t(dev_t dev, int which, void * wql, struct proc *p);
119typedef int mmap_fcn_t(void);
120
121#define d_open_t open_close_fcn_t
122#define d_close_t open_close_fcn_t
123#define d_read_t read_write_fcn_t
124#define d_write_t read_write_fcn_t
125#define d_ioctl_t ioctl_fcn_t
126#define d_stop_t stop_fcn_t
127#define d_reset_t reset_fcn_t
128#define d_select_t select_fcn_t
129#define d_mmap_t mmap_fcn_t
130#define d_strategy_t strategy_fcn_t
131
132__BEGIN_DECLS
133int enodev(void);
134void enodev_strat(void);
135__END_DECLS
136
137/*
138 * Versions of enodev() pointer, cast to appropriate function type. For use
139 * in empty devsw slots.
140 */
141#define eno_opcl ((open_close_fcn_t *)&enodev)
142#define eno_strat ((strategy_fcn_t *)&enodev_strat)
143#define eno_ioctl ((ioctl_fcn_t *)&enodev)
144#define eno_dump ((dump_fcn_t *)&enodev)
145#define eno_psize ((psize_fcn_t *)&enodev)
146#define eno_rdwrt ((read_write_fcn_t *)&enodev)
147#define eno_stop ((stop_fcn_t *)&enodev)
148#define eno_reset ((reset_fcn_t *)&enodev)
149#define eno_mmap ((mmap_fcn_t *)&enodev)
150#define eno_select ((select_fcn_t *)&enodev)
151
152/* For source backward compatibility only! */
153#define eno_getc ((void *)&enodev)
154#define eno_putc ((void *)&enodev)
155
156/*
157 * Block device switch table
158 */
159struct bdevsw {
160 open_close_fcn_t *d_open;
161 open_close_fcn_t *d_close;
162 strategy_fcn_t *d_strategy;
163 ioctl_fcn_t *d_ioctl;
164 dump_fcn_t *d_dump;
165 psize_fcn_t *d_psize;
166 int d_type;
167};
168
169
170d_devtotty_t nodevtotty;
171d_write_t nowrite;
172
173#ifdef KERNEL_PRIVATE
174extern struct bdevsw bdevsw[];
175extern int (*bootcache_contains_block)(dev_t device, u_int64_t blkno);
176#endif /* KERNEL_PRIVATE */
177
178/*
179 * Contents of empty bdevsw slot.
180 */
181#define NO_BDEVICE \
182 { eno_opcl, eno_opcl, eno_strat, eno_ioctl, \
183 eno_dump, eno_psize, 0 }
184
185
186/*
187 * Character device switch table
188 */
189struct cdevsw {
190 open_close_fcn_t *d_open;
191 open_close_fcn_t *d_close;
192 read_write_fcn_t *d_read;
193 read_write_fcn_t *d_write;
194 ioctl_fcn_t *d_ioctl;
195 stop_fcn_t *d_stop;
196 reset_fcn_t *d_reset;
197 struct tty **d_ttys;
198 select_fcn_t *d_select;
199 mmap_fcn_t *d_mmap;
200 strategy_fcn_t *d_strategy;
201 void *d_reserved_1;
202 void *d_reserved_2;
203 int d_type;
204};
205
206#ifdef BSD_KERNEL_PRIVATE
207void devsw_init(void);
208
209extern uint64_t cdevsw_flags[];
210#define CDEVSW_SELECT_KQUEUE 0x01
211#define CDEVSW_USE_OFFSET 0x02
212
213struct thread;
214
215typedef struct devsw_lock {
216 TAILQ_ENTRY(devsw_lock) dl_list;
217 struct thread *dl_thread;
218 dev_t dl_dev;
219 int dl_mode;
220} *devsw_lock_t;
221
222#endif /* BSD_KERNEL_PRIVATE */
223
224
225/*
226 * Contents of empty cdevsw slot.
227 */
228
229#define NO_CDEVICE \
230 { \
231 eno_opcl, eno_opcl, eno_rdwrt, eno_rdwrt, \
232 eno_ioctl, eno_stop, eno_reset, 0, \
233 (select_fcn_t *)seltrue, eno_mmap, eno_strat, eno_getc, \
234 eno_putc, 0 \
235 }
236
237#endif /* KERNEL */
238
239#ifdef KERNEL_PRIVATE
240typedef int l_open_t (dev_t dev, struct tty *tp);
241typedef int l_close_t(struct tty *tp, int flags);
242typedef int l_read_t (struct tty *tp, struct uio *uio, int flag);
243typedef int l_write_t(struct tty *tp, struct uio *uio, int flag);
244typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data, int flag,
245 struct proc *p);
246typedef int l_rint_t (int c, struct tty *tp);
247typedef void l_start_t(struct tty *tp);
248typedef int l_modem_t(struct tty *tp, int flag);
249
250/*
251 * Line discipline switch table
252 */
253struct linesw {
254 l_open_t *l_open;
255 l_close_t *l_close;
256 l_read_t *l_read;
257 l_write_t *l_write;
258 l_ioctl_t *l_ioctl;
259 l_rint_t *l_rint;
260 l_start_t *l_start;
261 l_modem_t *l_modem;
262};
263
264
265extern struct linesw linesw[];
266extern int nlinesw;
267
268int ldisc_register(int , struct linesw *);
269void ldisc_deregister(int);
270#define LDISC_LOAD -1 /* Loadable line discipline */
271
272#endif /* KERNEL_PRIVATE */
273
274#ifdef BSD_KERNEL_PRIVATE
275/*
276 * Swap device table
277 */
278struct swdevt {
279 dev_t sw_dev;
280 int sw_flags;
281 int sw_nblks;
282 struct vnode *sw_vp;
283};
284#define SW_FREED 0x01
285#define SW_SEQUENTIAL 0x02
286#define sw_freed sw_flags /* XXX compat */
287
288extern struct swdevt swdevt[];
289
290#endif /* BSD_KERNEL_PRIVATE */
291
292
293#ifdef KERNEL
294/*
295 * ***_free finds free slot;
296 * ***_add adds entries to the devsw table
297 * If int arg is -1; finds a free slot
298 * Returns the major number if successful
299 * else -1
300 */
301__BEGIN_DECLS
302#ifdef KERNEL_PRIVATE
303extern struct cdevsw cdevsw[];
304extern int cdevsw_setkqueueok(int, struct cdevsw*, int);
305#endif /* KERNEL_PRIVATE */
306
307#ifdef BSD_KERNEL_PRIVATE
308extern void devsw_lock(dev_t, int);
309extern void devsw_unlock(dev_t, int);
310#endif /* BSD_KERNEL_PRIVATE */
311
312int bdevsw_isfree(int);
313int bdevsw_add(int, struct bdevsw *);
314int bdevsw_remove(int, struct bdevsw *);
315int cdevsw_isfree(int);
316int cdevsw_add(int, struct cdevsw *);
317int cdevsw_add_with_bdev(int index, struct cdevsw * csw, int bdev);
318int cdevsw_remove(int, struct cdevsw *);
319int isdisk(dev_t, int);
320__END_DECLS
321#endif /* KERNEL */
322
323#endif /* _SYS_CONF_H_ */