1 // SPDX-License-Identifier: GPL-2.0
5 //! C header: [`include/asm-generic/ioctl.h`](srctree/include/asm-generic/ioctl.h)
13 const fn _IOC(dir: u32, ty: u32, nr: u32, size: usize) -> u32 {  in _IOC()
14     build_assert!(dir <= uapi::_IOC_DIRMASK);  in _IOC()
15     build_assert!(ty <= uapi::_IOC_TYPEMASK);  in _IOC()
16     build_assert!(nr <= uapi::_IOC_NRMASK);  in _IOC()
17     build_assert!(size <= (uapi::_IOC_SIZEMASK as usize));  in _IOC()
19     (dir << uapi::_IOC_DIRSHIFT)  in _IOC()
20         | (ty << uapi::_IOC_TYPESHIFT)  in _IOC()
21         | (nr << uapi::_IOC_NRSHIFT)  in _IOC()
22         | ((size as u32) << uapi::_IOC_SIZESHIFT)  in _IOC()
27 pub const fn _IO(ty: u32, nr: u32) -> u32 {  in _IO()
28     _IOC(uapi::_IOC_NONE, ty, nr, 0)  in _IO()
31 /// Build an ioctl number for a read-only ioctl.
33 pub const fn _IOR<T>(ty: u32, nr: u32) -> u32 {  in _IOR()
34     _IOC(uapi::_IOC_READ, ty, nr, core::mem::size_of::<T>())  in _IOR()
37 /// Build an ioctl number for a write-only ioctl.
39 pub const fn _IOW<T>(ty: u32, nr: u32) -> u32 {  in _IOW()
40     _IOC(uapi::_IOC_WRITE, ty, nr, core::mem::size_of::<T>())  in _IOW()
43 /// Build an ioctl number for a read-write ioctl.
45 pub const fn _IOWR<T>(ty: u32, nr: u32) -> u32 {  in _IOWR()
47         uapi::_IOC_READ | uapi::_IOC_WRITE,  in _IOWR()
55 pub const fn _IOC_DIR(nr: u32) -> u32 {  in _IOC_DIR()
56     (nr >> uapi::_IOC_DIRSHIFT) & uapi::_IOC_DIRMASK  in _IOC_DIR()
60 pub const fn _IOC_TYPE(nr: u32) -> u32 {  in _IOC_TYPE()
61     (nr >> uapi::_IOC_TYPESHIFT) & uapi::_IOC_TYPEMASK  in _IOC_TYPE()
65 pub const fn _IOC_NR(nr: u32) -> u32 {  in _IOC_NR()
66     (nr >> uapi::_IOC_NRSHIFT) & uapi::_IOC_NRMASK  in _IOC_NR()
70 pub const fn _IOC_SIZE(nr: u32) -> usize {  in _IOC_SIZE()
71     ((nr >> uapi::_IOC_SIZESHIFT) & uapi::_IOC_SIZEMASK) as usize  in _IOC_SIZE()