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Commit 1c29224f authored by Pete Zaitcev's avatar Pete Zaitcev Committed by David S. Miller
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[SPARC32/64]: Expand ioctl size field in backwards-compatible way.

parent faced850
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Showing with 50 additions and 20 deletions
include/asm-sparc/ioctl.h
View file @ 1c29224f
......@@ -2,23 +2,35 @@
#ifndef _SPARC_IOCTL_H
#define _SPARC_IOCTL_H
/*
* Our DIR and SIZE overlap in order to simulteneously provide
* a non-zero _IOC_NONE (for binary compatibility) and
* 14 bits of size as on i386. Here's the layout:
*
* 0xE0000000 DIR
* 0x80000000 DIR = WRITE
* 0x40000000 DIR = READ
* 0x20000000 DIR = NONE
* 0x3FFF0000 SIZE (overlaps NONE bit)
* 0x0000FF00 TYPE
* 0x000000FF NR (CMD)
*/
#define _IOC_NRBITS 8
#define _IOC_TYPEBITS 8
#define _IOC_SIZEBITS 8
#define _IOC_RESVBITS 5
#define _IOC_SIZEBITS 13 /* Actually 14, see below. */
#define _IOC_DIRBITS 3
#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
#define _IOC_RESVMASK ((1 << _IOC_RESVBITS)-1)
#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
#define _IOC_XSIZEMASK ((1 << (_IOC_SIZEBITS+1))-1)
#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
#define _IOC_NRSHIFT 0
#define _IOC_TYPESHIFT (_IOC_NRSHIFT + _IOC_NRBITS)
#define _IOC_SIZESHIFT (_IOC_TYPESHIFT + _IOC_TYPEBITS)
#define _IOC_RESVSHIFT (_IOC_SIZESHIFT + _IOC_SIZEBITS)
#define _IOC_DIRSHIFT (_IOC_RESVSHIFT + _IOC_RESVBITS)
#define _IOC_DIRSHIFT (_IOC_SIZESHIFT + _IOC_SIZEBITS)
#define _IOC_NONE 1U
#define _IOC_READ 2U
......@@ -35,17 +47,20 @@
#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
/* Used to decode ioctl numbers in drivers despite the leading underscore... */
#define _IOC_DIR(nr) \
( (((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) != 0)? \
(((nr) >> _IOC_DIRSHIFT) & (_IOC_WRITE|_IOC_READ)): \
(((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) )
#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
/* ...and for the PCMCIA... */
#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_XSIZEMASK)
/* ...and for the PCMCIA and sound. */
#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
#define IOCSIZE_MASK (_IOC_XSIZEMASK << _IOC_SIZESHIFT)
#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
#endif /* !(_SPARC_IOCTL_H) */
include/asm-sparc64/ioctl.h
View file @ 1c29224f
......@@ -2,23 +2,35 @@
#ifndef _SPARC64_IOCTL_H
#define _SPARC64_IOCTL_H
/*
* Our DIR and SIZE overlap in order to simulteneously provide
* a non-zero _IOC_NONE (for binary compatibility) and
* 14 bits of size as on i386. Here's the layout:
*
* 0xE0000000 DIR
* 0x80000000 DIR = WRITE
* 0x40000000 DIR = READ
* 0x20000000 DIR = NONE
* 0x3FFF0000 SIZE (overlaps NONE bit)
* 0x0000FF00 TYPE
* 0x000000FF NR (CMD)
*/
#define _IOC_NRBITS 8
#define _IOC_TYPEBITS 8
#define _IOC_SIZEBITS 8
#define _IOC_RESVBITS 5
#define _IOC_SIZEBITS 13 /* Actually 14, see below. */
#define _IOC_DIRBITS 3
#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
#define _IOC_RESVMASK ((1 << _IOC_RESVBITS)-1)
#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
#define _IOC_XSIZEMASK ((1 << (_IOC_SIZEBITS+1))-1)
#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
#define _IOC_NRSHIFT 0
#define _IOC_TYPESHIFT (_IOC_NRSHIFT + _IOC_NRBITS)
#define _IOC_SIZESHIFT (_IOC_TYPESHIFT + _IOC_TYPEBITS)
#define _IOC_RESVSHIFT (_IOC_SIZESHIFT + _IOC_SIZEBITS)
#define _IOC_DIRSHIFT (_IOC_RESVSHIFT + _IOC_RESVBITS)
#define _IOC_DIRSHIFT (_IOC_SIZESHIFT + _IOC_SIZEBITS)
#define _IOC_NONE 1U
#define _IOC_READ 2U
......@@ -35,17 +47,20 @@
#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
/* Used to decode ioctl numbers in drivers despite the leading underscore... */
#define _IOC_DIR(nr) \
( (((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) != 0)? \
(((nr) >> _IOC_DIRSHIFT) & (_IOC_WRITE|_IOC_READ)): \
(((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) )
#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
/* ...and for the PCMCIA... */
#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_XSIZEMASK)
/* ...and for the PCMCIA and sound. */
#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
#define IOCSIZE_MASK (_IOC_XSIZEMASK << _IOC_SIZESHIFT)
#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
#endif /* !(_SPARC64_IOCTL_H) */
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