virtio/devices/virtio_gpu/messages/
resource_detach_backing.rs

1// Licensed under the Apache License, Version 2.0 or the MIT License.
2// SPDX-License-Identifier: Apache-2.0 OR MIT
3// Copyright Tock Contributors 2025.
4
5use kernel::ErrorCode;
6
7use super::super::helpers::copy_to_iter;
8use super::ctrl_header::{CtrlHeader, CtrlType};
9use super::{VirtIOGPUReq, VirtIOGPUResp};
10
11#[derive(Debug, Copy, Clone)]
12#[repr(C)]
13pub struct ResourceDetachBackingReq {
14    pub ctrl_header: CtrlHeader,
15    pub resource_id: u32,
16    pub padding: u32,
17}
18
19impl VirtIOGPUReq for ResourceDetachBackingReq {
20    const ENCODED_SIZE: usize = core::mem::size_of::<Self>();
21    const CTRL_TYPE: CtrlType = CtrlType::CmdResourceDetachBacking;
22    type ExpectedResponse = ResourceDetachBackingResp;
23
24    fn write_to_byte_iter<'a>(
25        &self,
26        dst: &mut impl Iterator<Item = &'a mut u8>,
27    ) -> Result<(), ErrorCode> {
28        // Write out fields to iterator.
29        //
30        // This struct doesn't need any padding bytes.
31        self.ctrl_header.write_to_byte_iter(dst)?;
32        copy_to_iter(dst, u32::to_le_bytes(self.resource_id).into_iter())?;
33        copy_to_iter(dst, u32::to_le_bytes(self.padding).into_iter())?;
34
35        Ok(())
36    }
37}
38
39#[derive(Debug, Copy, Clone)]
40#[repr(C)]
41pub struct ResourceDetachBackingResp {
42    pub ctrl_header: CtrlHeader,
43}
44
45impl VirtIOGPUResp for ResourceDetachBackingResp {
46    const ENCODED_SIZE: usize = core::mem::size_of::<Self>();
47    const EXPECTED_CTRL_TYPE: CtrlType = CtrlType::RespOkNoData;
48
49    fn from_byte_iter_post_checked_ctrl_header(
50        ctrl_header: CtrlHeader,
51        _src: &mut impl Iterator<Item = u8>,
52    ) -> Result<Self, ErrorCode> {
53        Ok(ResourceDetachBackingResp { ctrl_header })
54    }
55}
virtio/devices/virtio_gpu/messages/resource_detach_backing.rs

virtio/devices/virtio_gpu/messages/
resource_detach_backing.rs
