virtio/devices/virtio_gpu/messages/
resource_flush.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::{Rect, VirtIOGPUReq, VirtIOGPUResp};
10
11#[derive(Debug, Copy, Clone)]
12#[repr(C)]
13pub struct ResourceFlushReq {
14    pub ctrl_header: CtrlHeader,
15    pub r: Rect,
16    pub resource_id: u32,
17    pub padding: u32,
18}
19
20impl VirtIOGPUReq for ResourceFlushReq {
21    const ENCODED_SIZE: usize = core::mem::size_of::<Self>();
22    const CTRL_TYPE: CtrlType = CtrlType::CmdResourceFlush;
23    type ExpectedResponse = ResourceFlushResp;
24
25    fn write_to_byte_iter<'a>(
26        &self,
27        dst: &mut impl Iterator<Item = &'a mut u8>,
28    ) -> Result<(), ErrorCode> {
29        // Write out fields to iterator.
30        //
31        // This struct doesn't need any padding bytes.
32        self.ctrl_header.write_to_byte_iter(dst)?;
33        self.r.write_to_byte_iter(dst)?;
34        copy_to_iter(dst, u32::to_le_bytes(self.resource_id).into_iter())?;
35        copy_to_iter(dst, u32::to_le_bytes(self.padding).into_iter())?;
36
37        Ok(())
38    }
39}
40
41#[derive(Debug, Copy, Clone)]
42#[repr(C)]
43pub struct ResourceFlushResp {
44    pub ctrl_header: CtrlHeader,
45}
46
47impl VirtIOGPUResp for ResourceFlushResp {
48    const ENCODED_SIZE: usize = core::mem::size_of::<Self>();
49    const EXPECTED_CTRL_TYPE: CtrlType = CtrlType::RespOkNoData;
50
51    fn from_byte_iter_post_checked_ctrl_header(
52        ctrl_header: CtrlHeader,
53        _src: &mut impl Iterator<Item = u8>,
54    ) -> Result<Self, ErrorCode> {
55        Ok(ResourceFlushResp { ctrl_header })
56    }
57}
virtio/devices/virtio_gpu/messages/resource_flush.rs

virtio/devices/virtio_gpu/messages/
resource_flush.rs
