1 /* 2 * This header was generated from the Linux kernel headers by update_headers.py, 3 * to provide necessary information from kernel to userspace, such as constants, 4 * structures, and macros, and thus, contains no copyrightable information. 5 */ 6 #ifndef _UAPI_ASM_GENERIC_IOCTL_H 7 #define _UAPI_ASM_GENERIC_IOCTL_H 8 #define _IOC_NRBITS 8 9 #define _IOC_TYPEBITS 8 10 #ifndef _IOC_SIZEBITS 11 # define _IOC_SIZEBITS 14 12 #endif 13 #ifndef _IOC_DIRBITS 14 # define _IOC_DIRBITS 2 15 #endif 16 #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) 17 #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) 18 #define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1) 19 #define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1) 20 #define _IOC_NRSHIFT 0 21 #define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS) 22 #define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS) 23 #define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS) 24 #ifndef _IOC_NONE 25 # define _IOC_NONE 0U 26 #endif 27 #ifndef _IOC_WRITE 28 # define _IOC_WRITE 1U 29 #endif 30 #ifndef _IOC_READ 31 # define _IOC_READ 2U 32 #endif 33 #define _IOC(dir,type,nr,size) \ 34 (((dir) << _IOC_DIRSHIFT) | \ 35 ((type) << _IOC_TYPESHIFT) | \ 36 ((nr) << _IOC_NRSHIFT) | \ 37 ((size) << _IOC_SIZESHIFT)) 38 #ifndef __KERNEL__ 39 #define _IOC_TYPECHECK(t) (sizeof(t)) 40 #endif 41 #define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0) 42 #define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size))) 43 #define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size))) 44 #define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size))) 45 #define _IOR_BAD(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size)) 46 #define _IOW_BAD(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size)) 47 #define _IOWR_BAD(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size)) 48 #define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) 49 #define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK) 50 #define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK) 51 #define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK) 52 #define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT) 53 #define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT) 54 #define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT) 55 #define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT) 56 #define IOCSIZE_SHIFT (_IOC_SIZESHIFT) 57 #endif 58