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