Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2
3use kernel::uapi;
4
5// TODO Work out some common infrastructure to avoid boilerplate code for uAPI abstractions.
6
7macro_rules! define_uapi_abstraction {
8 ($name:ident <= $inner:ty) => {
9 #[repr(transparent)]
10 pub struct $name(::kernel::types::Opaque<$inner>);
11
12 impl ::core::convert::From<&::kernel::types::Opaque<$inner>> for &$name {
13 fn from(value: &::kernel::types::Opaque<$inner>) -> Self {
14 // SAFETY: `Self` is a transparent wrapper of `$inner`.
15 unsafe { ::core::mem::transmute(value) }
16 }
17 }
18 };
19}
20
21define_uapi_abstraction!(Getparam <= uapi::drm_nova_getparam);
22
23impl Getparam {
24 pub fn param(&self) -> u64 {
25 // SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_getparam`.
26 unsafe { (*self.0.get()).param }
27 }
28
29 pub fn set_value(&self, v: u64) {
30 // SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_getparam`.
31 unsafe { (*self.0.get()).value = v };
32 }
33}
34
35define_uapi_abstraction!(GemCreate <= uapi::drm_nova_gem_create);
36
37impl GemCreate {
38 pub fn size(&self) -> u64 {
39 // SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_gem_create`.
40 unsafe { (*self.0.get()).size }
41 }
42
43 pub fn set_handle(&self, handle: u32) {
44 // SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_gem_create`.
45 unsafe { (*self.0.get()).handle = handle };
46 }
47}
48
49define_uapi_abstraction!(GemInfo <= uapi::drm_nova_gem_info);
50
51impl GemInfo {
52 pub fn handle(&self) -> u32 {
53 // SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_gem_info`.
54 unsafe { (*self.0.get()).handle }
55 }
56
57 pub fn set_size(&self, size: u64) {
58 // SAFETY: `self.get()` is a valid pointer to a `struct drm_nova_gem_info`.
59 unsafe { (*self.0.get()).size = size };
60 }
61}