firewire_dice_protocols/tcat/extension/
router_section.rs

1// SPDX-License-Identifier: LGPL-3.0-or-later
2// Copyright (c) 2020 Takashi Sakamoto
3
4//! Router section in protocol extension defined by TCAT for ASICs of DICE.
5//!
6//! The module includes structure, enumeration, and trait and its implementation for router section
7//! in protocol extension defined by TCAT for ASICs of DICE.
8
9use super::{router_entry::*, *};
10
11/// Parameter of entries in router section.
12#[derive(Default, Debug, Clone, PartialEq, Eq)]
13pub struct RouterParams(pub Vec<RouterEntry>);
14
15impl<O: TcatExtensionOperation> TcatExtensionSectionParamsOperation<RouterParams> for O {
16    fn cache_extension_whole_params(
17        req: &FwReq,
18        node: &FwNode,
19        sections: &ExtensionSections,
20        caps: &ExtensionCaps,
21        params: &mut RouterParams,
22        timeout_ms: u32,
23    ) -> Result<(), Error> {
24        let size = 4 + calculate_router_entries_size(caps.router.maximum_entry_count as usize);
25        let size = std::cmp::min(sections.router.size, size);
26        let mut raw = vec![0u8; size];
27
28        Self::read_extension(req, node, &sections.router, 0, &mut raw, timeout_ms)?;
29
30        let mut val = 0u32;
31        deserialize_u32(&mut val, &raw[..4]);
32        params.0.resize_with(val as usize, Default::default);
33
34        deserialize_router_entries(&mut params.0, &mut raw[4..])
35            .map_err(|cause| Error::new(ProtocolExtensionError::Router, &cause))
36    }
37}
38
39impl<O: TcatExtensionOperation> TcatExtensionSectionWholeMutableParamsOperation<RouterParams>
40    for O
41{
42    fn update_extension_whole_params(
43        req: &FwReq,
44        node: &FwNode,
45        sections: &ExtensionSections,
46        caps: &ExtensionCaps,
47        params: &RouterParams,
48        timeout_ms: u32,
49    ) -> Result<(), Error> {
50        if params.0.len() >= caps.router.maximum_entry_count as usize {
51            let msg = format!(
52                "The number of router entries should be less than{}, but {} given",
53                caps.router.maximum_entry_count,
54                params.0.len(),
55            );
56            Err(Error::new(ProtocolExtensionError::Router, &msg))?;
57        }
58
59        let size = 4 + calculate_router_entries_size(params.0.len() as usize);
60        let mut raw = vec![0u8; size];
61
62        serialize_u32(&(params.0.len() as u32), &mut raw[..4]);
63        serialize_router_entries(&params.0, &mut raw[4..])
64            .map_err(|cause| Error::new(ProtocolExtensionError::Router, &cause))?;
65
66        Self::write_extension(req, node, &sections.router, 0, &mut raw, timeout_ms)
67    }
68}
firewire_dice_protocols/tcat/extension/router_section.rs

firewire_dice_protocols/tcat/extension/
router_section.rs
