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// SPDX-License-Identifier: GPL-2.0
use kernel::uapi;
// TODO Work out some common infrastructure to avoid boilerplate code for uAPI abstractions.
macro_rules! define_uapi_abstraction {
($name:ident <= $inner:ty) => {
#[repr(transparent)]
pub struct $name(::kernel::types::Opaque<$inner>);
impl ::core::convert::From<&::kernel::types::Opaque<$inner>> for &$name {
fn from(value: &::kernel::types::Opaque<$inner>) -> Self {
// SAFETY: `Self` is a transparent wrapper of `$inner`.
unsafe { ::core::mem::transmute(value) }
}
}
};
}
define_uapi_abstraction!(Getparam <= uapi::drm_nova_getparam);
impl Getparam {
pub fn param(&self) -> u64 {
// SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_getparam`.
unsafe { (*self.0.get()).param }
}
pub fn set_value(&self, v: u64) {
// SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_getparam`.
unsafe { (*self.0.get()).value = v };
}
}
define_uapi_abstraction!(GemCreate <= uapi::drm_nova_gem_create);
impl GemCreate {
pub fn size(&self) -> u64 {
// SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_gem_create`.
unsafe { (*self.0.get()).size }
}
pub fn set_handle(&self, handle: u32) {
// SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_gem_create`.
unsafe { (*self.0.get()).handle = handle };
}
}
define_uapi_abstraction!(GemInfo <= uapi::drm_nova_gem_info);
impl GemInfo {
pub fn handle(&self) -> u32 {
// SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_gem_info`.
unsafe { (*self.0.get()).handle }
}
pub fn set_size(&self, size: u64) {
// SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_gem_info`.
unsafe { (*self.0.get()).size = size };
}
}
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