1 // Copyright 2024, Linaro Limited 2 // Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org> 3 // SPDX-License-Identifier: GPL-2.0-or-later 4 5 use std::sync::OnceLock; 6 7 use crate::bindings::Property; 8 9 #[macro_export] 10 macro_rules! device_class_init { 11 ($func:ident, props => $props:ident, realize_fn => $realize_fn:expr, legacy_reset_fn => $legacy_reset_fn:expr, vmsd => $vmsd:ident$(,)*) => { 12 #[no_mangle] 13 pub unsafe extern "C" fn $func( 14 klass: *mut $crate::bindings::ObjectClass, 15 _: *mut ::core::ffi::c_void, 16 ) { 17 let mut dc = 18 ::core::ptr::NonNull::new(klass.cast::<$crate::bindings::DeviceClass>()).unwrap(); 19 unsafe { 20 dc.as_mut().realize = $realize_fn; 21 dc.as_mut().vmsd = &$vmsd; 22 $crate::bindings::device_class_set_legacy_reset(dc.as_mut(), $legacy_reset_fn); 23 $crate::bindings::device_class_set_props(dc.as_mut(), $props.as_mut_ptr()); 24 } 25 } 26 }; 27 } 28 29 #[macro_export] 30 macro_rules! define_property { 31 ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr, default = $defval:expr$(,)*) => { 32 $crate::bindings::Property { 33 name: { 34 #[used] 35 static _TEMP: &::core::ffi::CStr = $name; 36 _TEMP.as_ptr() 37 }, 38 info: $prop, 39 offset: ::core::mem::offset_of!($state, $field) 40 .try_into() 41 .expect("Could not fit offset value to type"), 42 bitnr: 0, 43 bitmask: 0, 44 set_default: true, 45 defval: $crate::bindings::Property__bindgen_ty_1 { u: $defval.into() }, 46 arrayoffset: 0, 47 arrayinfo: ::core::ptr::null(), 48 arrayfieldsize: 0, 49 link_type: ::core::ptr::null(), 50 } 51 }; 52 ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr$(,)*) => { 53 $crate::bindings::Property { 54 name: { 55 #[used] 56 static _TEMP: &::core::ffi::CStr = $name; 57 _TEMP.as_ptr() 58 }, 59 info: $prop, 60 offset: ::core::mem::offset_of!($state, $field) 61 .try_into() 62 .expect("Could not fit offset value to type"), 63 bitnr: 0, 64 bitmask: 0, 65 set_default: false, 66 defval: $crate::bindings::Property__bindgen_ty_1 { i: 0 }, 67 arrayoffset: 0, 68 arrayinfo: ::core::ptr::null(), 69 arrayfieldsize: 0, 70 link_type: ::core::ptr::null(), 71 } 72 }; 73 } 74 75 #[repr(C)] 76 pub struct Properties<const N: usize>(pub OnceLock<[Property; N]>, pub fn() -> [Property; N]); 77 78 impl<const N: usize> Properties<N> { 79 pub fn as_mut_ptr(&mut self) -> *mut Property { 80 _ = self.0.get_or_init(self.1); 81 self.0.get_mut().unwrap().as_mut_ptr() 82 } 83 } 84 85 #[macro_export] 86 macro_rules! declare_properties { 87 ($ident:ident, $($prop:expr),*$(,)*) => { 88 89 const fn _calc_prop_len() -> usize { 90 let mut len = 1; 91 $({ 92 _ = stringify!($prop); 93 len += 1; 94 })* 95 len 96 } 97 const PROP_LEN: usize = _calc_prop_len(); 98 99 fn _make_properties() -> [$crate::bindings::Property; PROP_LEN] { 100 [ 101 $($prop),*, 102 unsafe { ::core::mem::MaybeUninit::<$crate::bindings::Property>::zeroed().assume_init() }, 103 ] 104 } 105 106 #[no_mangle] 107 pub static mut $ident: $crate::device_class::Properties<PROP_LEN> = $crate::device_class::Properties(::std::sync::OnceLock::new(), _make_properties); 108 }; 109 } 110 111 #[macro_export] 112 macro_rules! vm_state_description { 113 ($(#[$outer:meta])* 114 $name:ident, 115 $(name: $vname:expr,)* 116 $(unmigratable: $um_val:expr,)* 117 ) => { 118 #[used] 119 $(#[$outer])* 120 pub static $name: $crate::bindings::VMStateDescription = $crate::bindings::VMStateDescription { 121 $(name: { 122 #[used] 123 static VMSTATE_NAME: &::core::ffi::CStr = $vname; 124 $vname.as_ptr() 125 },)* 126 unmigratable: true, 127 ..unsafe { ::core::mem::MaybeUninit::<$crate::bindings::VMStateDescription>::zeroed().assume_init() } 128 }; 129 } 130 } 131