The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/tdfx/tdfx_io.h

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    1 /*-
    2  * Copyright (c) 2000-2001 by Coleman Kane <cokane@FreeBSD.org>
    3  * 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 Gardner Buchanan.
   16  * 4. The name of Gardner Buchanan may not be used to endorse or promote
   17  *    products derived from this software without specific prior written
   18  *    permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   30  *
   31  *   $FreeBSD: releng/7.4/sys/dev/tdfx/tdfx_io.h 139749 2005-01-06 01:43:34Z imp $
   32  */
   33 
   34 /* This code originally came from <shocking@prth.pgs.com>
   35  * it is basically a derivative of some sys/dhio.h file to work with the 3dfx
   36  * cards 
   37  */
   38 #ifndef TDFX_IO_H
   39 #define TDFX_IO_H
   40 
   41 #ifndef KERNEL
   42 #include <sys/types.h>
   43 #endif
   44 
   45 /*
   46  * define an ioctl here
   47  */
   48 #define DHIOCRESET _IO('D', 0)   /* reset the voodoo device */
   49 #define GETVOODOO 0x3302
   50 #define SETVOODOO 0x3303
   51 #define MOREVOODOO 0x3300
   52 #define _IOC_NRBITS     8
   53 #define _IOC_TYPEBITS   8
   54 #define _IOC_SIZEBITS   14
   55 #define _IOC_DIRBITS    2
   56 
   57 #define _IOC_NRMASK     ((1 << _IOC_NRBITS)-1)
   58 #define _IOC_TYPEMASK   ((1 << _IOC_TYPEBITS)-1)
   59 #define _IOC_SIZEMASK   ((1 << _IOC_SIZEBITS)-1)
   60 #define _IOC_DIRMASK    ((1 << _IOC_DIRBITS)-1)
   61 
   62 #define _IOC_NRSHIFT    0
   63 #define _IOC_TYPESHIFT  (_IOC_NRSHIFT+_IOC_NRBITS)
   64 #define _IOC_SIZESHIFT  (_IOC_TYPESHIFT+_IOC_TYPEBITS)
   65 #define _IOC_DIRSHIFT   (_IOC_SIZESHIFT+_IOC_SIZEBITS)
   66 
   67 /*
   68  * Direction bits.
   69  */
   70 #define _IOC_NONE       0U
   71 #define _IOC_WRITE      1U
   72 #define _IOC_READ       2U
   73 
   74 #define _IOCV(dir,type,nr,size) \
   75         (((dir)  << _IOC_DIRSHIFT) | \
   76          ((type) << _IOC_TYPESHIFT) | \
   77          ((nr)   << _IOC_NRSHIFT) | \
   78          ((size) << _IOC_SIZESHIFT))
   79 
   80 /* used to create numbers */
   81 #define _IOV(type,nr)           _IOCV(_IOC_NONE,(type),(nr),0)
   82 #define _IORV(type,nr,size)     _IOCV(_IOC_READ,(type),(nr),sizeof(size))
   83 #define _IOWV(type,nr,size)     _IOCV(_IOC_WRITE,(type),(nr),sizeof(size))
   84 #define _IOWRV(type,nr,size)    _IOCV(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
   85 
   86 /* used to decode ioctl numbers.. */
   87 #define _IOC_DIR(nr)            (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
   88 #define _IOC_TYPE(nr)           (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
   89 #define _IOC_NR(nr)             (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
   90 #define _IOC_SIZE(nr)           (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
   91 
   92 /* ...and for the drivers/sound files... */
   93 
   94 #define IOCV_IN         (_IOC_WRITE << _IOC_DIRSHIFT)
   95 #define IOCV_OUT        (_IOC_READ << _IOC_DIRSHIFT)
   96 #define IOCV_INOUT      ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
   97 #define IOCSIZE_MASK    (_IOC_SIZEMASK << _IOC_SIZESHIFT)
   98 #define IOCSIZE_SHIFT   (_IOC_SIZESHIFT)
   99 
  100 #endif

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