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