1 /*- 2 * Copyright (c) 1982, 1986, 1990, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)ioccom.h 8.2 (Berkeley) 3/28/94 34 * $FreeBSD: src/sys/sys/ioccom.h,v 1.9 1999/12/29 04:24:42 peter Exp $ 35 * $DragonFly: src/sys/sys/ioccom.h,v 1.4 2007/01/10 13:33:22 swildner Exp $ 36 */ 37 38 #ifndef _SYS_IOCCOM_H_ 39 #define _SYS_IOCCOM_H_ 40 41 /* 42 * Ioctl's have the command encoded in the lower word, and the size of 43 * any in or out parameters in the upper word. The high 3 bits of the 44 * upper word are used to encode the in/out status of the parameter. 45 */ 46 #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */ 47 #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK) 48 #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16)) 49 #define IOCGROUP(x) (((x) >> 8) & 0xff) 50 51 #define IOCPARM_MAX PAGE_SIZE /* max size of ioctl, mult. of PAGE_SIZE */ 52 #define IOC_VOID 0x20000000 /* no parameters */ 53 #define IOC_OUT 0x40000000 /* copy out parameters */ 54 #define IOC_IN 0x80000000 /* copy in parameters */ 55 #define IOC_INOUT (IOC_IN|IOC_OUT) 56 #define IOC_DIRMASK 0xe0000000 /* mask for IN/OUT/VOID */ 57 58 #define _IOC(inout,group,num,len) \ 59 ((unsigned long)(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))) 60 #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0) 61 #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t)) 62 #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t)) 63 /* this should be _IORW, but stdio got there first */ 64 #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t)) 65 66 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL) 67 68 #include <sys/cdefs.h> 69 70 __BEGIN_DECLS 71 int ioctl (int, unsigned long, ...); 72 __END_DECLS 73 74 #endif 75 76 #endif /* !_SYS_IOCCOM_H_ */ 77