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 * Device switch function types.
98 */
99typedef int open_close_fcn_t(dev_t dev, int flags, int devtype,
100 struct proc *p);
101
102typedef struct tty *d_devtotty_t(dev_t dev);
103
104typedef void strategy_fcn_t(struct buf *bp);
105typedef int ioctl_fcn_t(dev_t dev, u_long cmd, caddr_t data,
106 int fflag, struct proc *p);
107typedef int dump_fcn_t(void); /* parameters vary by architecture */
108typedef int psize_fcn_t(dev_t dev);
109typedef int read_write_fcn_t(dev_t dev, struct uio *uio, int ioflag);
110typedef int stop_fcn_t(struct tty *tp, int rw);
111typedef int reset_fcn_t(int uban);
112typedef int select_fcn_t(dev_t dev, int which, void * wql, struct proc *p);
113typedef int mmap_fcn_t(void);
114typedef int rsvd_fcn_t(void);
115
116typedef void empty_fcn_t(void);
117
118#define d_open_t open_close_fcn_t
119#define d_close_t open_close_fcn_t
120#define d_read_t read_write_fcn_t
121#define d_write_t read_write_fcn_t
122#define d_ioctl_t ioctl_fcn_t
123#define d_stop_t stop_fcn_t
124#define d_reset_t reset_fcn_t
125#define d_select_t select_fcn_t
126#define d_mmap_t mmap_fcn_t
127#define d_strategy_t strategy_fcn_t
128
129
130__BEGIN_DECLS
131int enodev(void);
132void enodev_strat(void);
133__END_DECLS
134
135/*
136 * Versions of enodev() pointer, cast to appropriate function type. For use
137 * in empty devsw slots.
138 */
139#define eno_opcl ((open_close_fcn_t *)(empty_fcn_t*)&enodev)
140#define eno_strat ((strategy_fcn_t *)(empty_fcn_t*)&enodev_strat)
141#define eno_ioctl ((ioctl_fcn_t *)(empty_fcn_t*)&enodev)
142#define eno_dump ((dump_fcn_t *)(empty_fcn_t*)&enodev)
143#define eno_psize ((psize_fcn_t *)(empty_fcn_t*)&enodev)
144#define eno_rdwrt ((read_write_fcn_t *)(empty_fcn_t*)&enodev)
145#define eno_stop ((stop_fcn_t *)(empty_fcn_t*)&enodev)
146#define eno_reset ((reset_fcn_t *)(empty_fcn_t*)&enodev)
147#define eno_mmap ((mmap_fcn_t *)(empty_fcn_t*)&enodev)
148#define eno_select ((select_fcn_t *)(empty_fcn_t*)&enodev)
149
150/* For source backward compatibility only! */
151#define eno_getc ((rsvd_fcn_t *)&enodev)
152#define eno_putc ((rsvd_fcn_t *)&enodev)
153
154/*
155 * Block device switch table
156 */
157struct bdevsw {
158 open_close_fcn_t *d_open;
159 open_close_fcn_t *d_close;
160 strategy_fcn_t *d_strategy;
161 ioctl_fcn_t *d_ioctl;
162 dump_fcn_t *d_dump;
163 psize_fcn_t *d_psize;
164 int d_type;
165};
166
167
168d_devtotty_t nodevtotty;
169d_write_t nowrite;
170
171#ifdef KERNEL_PRIVATE
172extern struct bdevsw bdevsw[];
173extern int (*bootcache_contains_block)(dev_t device, u_int64_t blkno);
174#endif /* KERNEL_PRIVATE */
175
176/*
177 * Contents of empty bdevsw slot.
178 */
179#define NO_BDEVICE \
180 { eno_opcl, eno_opcl, eno_strat, eno_ioctl, \
181 eno_dump, eno_psize, 0 }
182
183
184/*
185 * Character device switch table
186 */
187struct cdevsw {
188 open_close_fcn_t *d_open;
189 open_close_fcn_t *d_close;
190 read_write_fcn_t *d_read;
191 read_write_fcn_t *d_write;
192 ioctl_fcn_t *d_ioctl;
193 stop_fcn_t *d_stop;
194 reset_fcn_t *d_reset;
195 struct tty **d_ttys;
196 select_fcn_t *d_select;
197 mmap_fcn_t *d_mmap;
198 strategy_fcn_t *d_strategy;
199 rsvd_fcn_t *d_reserved_1;
200 rsvd_fcn_t *d_reserved_2;
201 int d_type;
202};
203
204#ifdef BSD_KERNEL_PRIVATE
205
206extern uint64_t cdevsw_flags[];
207#define CDEVSW_SELECT_KQUEUE 0x01
208#define CDEVSW_USE_OFFSET 0x02
209#define CDEVSW_IS_PTC 0x04
210#define CDEVSW_IS_PTS 0x08
211
212struct thread;
213#endif /* BSD_KERNEL_PRIVATE */
214
215
216/*
217 * Contents of empty cdevsw slot.
218 */
219
220#define NO_CDEVICE \
221 { \
222 eno_opcl, eno_opcl, eno_rdwrt, eno_rdwrt, \
223 eno_ioctl, eno_stop, eno_reset, 0, \
224 (select_fcn_t *)(void (*)(void))seltrue, eno_mmap, \
225 eno_strat, eno_getc, \
226 eno_putc, 0 \
227 }
228
229#endif /* KERNEL */
230
231#ifdef KERNEL_PRIVATE
232typedef int l_open_t (dev_t dev, struct tty *tp);
233typedef int l_close_t(struct tty *tp, int flags);
234typedef int l_read_t (struct tty *tp, struct uio *uio, int flag);
235typedef int l_write_t(struct tty *tp, struct uio *uio, int flag);
236typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data, int flag,
237 struct proc *p);
238typedef int l_rint_t (int c, struct tty *tp);
239typedef void l_start_t(struct tty *tp);
240typedef int l_modem_t(struct tty *tp, int flag);
241
242/*
243 * Line discipline switch table
244 */
245struct linesw {
246 l_open_t *l_open;
247 l_close_t *l_close;
248 l_read_t *l_read;
249 l_write_t *l_write;
250 l_ioctl_t *l_ioctl;
251 l_rint_t *l_rint;
252 l_start_t *l_start;
253 l_modem_t *l_modem;
254};
255
256
257extern struct linesw linesw[];
258extern const int nlinesw;
259
260int ldisc_register(int, struct linesw *);
261void ldisc_deregister(int);
262#define LDISC_LOAD -1 /* Loadable line discipline */
263
264#endif /* KERNEL_PRIVATE */
265
266#ifdef BSD_KERNEL_PRIVATE
267/*
268 * Swap device table
269 */
270struct swdevt {
271 dev_t sw_dev;
272 int sw_flags;
273 int sw_nblks;
274 struct vnode *sw_vp;
275};
276#define SW_FREED 0x01
277#define SW_SEQUENTIAL 0x02
278#define sw_freed sw_flags /* XXX compat */
279
280extern struct swdevt swdevt[];
281
282#endif /* BSD_KERNEL_PRIVATE */
283
284
285#ifdef KERNEL
286/*
287 * ***_free finds free slot;
288 * ***_add adds entries to the devsw table
289 * If int arg is -1; finds a free slot
290 * Returns the major number if successful
291 * else -1
292 */
293__BEGIN_DECLS
294#ifdef KERNEL_PRIVATE
295extern struct cdevsw cdevsw[];
296extern int cdevsw_setkqueueok(int, const struct cdevsw*, int);
297#endif /* KERNEL_PRIVATE */
298
299#ifdef BSD_KERNEL_PRIVATE
300extern void devsw_lock(dev_t, int);
301extern void devsw_unlock(dev_t, int);
302#endif /* BSD_KERNEL_PRIVATE */
303
304int bdevsw_isfree(int);
305int bdevsw_add(int, const struct bdevsw *);
306int bdevsw_remove(int, const struct bdevsw *);
307int cdevsw_isfree(int);
308int cdevsw_add(int, const struct cdevsw *);
309int cdevsw_add_with_bdev(int index, const struct cdevsw * csw, int bdev);
310int cdevsw_remove(int, const struct cdevsw *);
311int isdisk(dev_t, int);
312__END_DECLS
313#endif /* KERNEL */
314
315#endif /* _SYS_CONF_H_ */
316