arch/src/serial/sys/unix.rs

// Copyright 2022 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

use std::sync::Arc;

use base::RawDescriptor;
use devices::serial_device::SerialParameters;
use devices::{Bus, ProxyDevice, Serial};
use minijail::Minijail;
use sync::Mutex;

use crate::serial::SERIAL_ADDR;
use crate::DeviceRegistrationError;

pub fn add_serial_device(
    com_num: usize,
    com: Serial,
    _serial_parameters: &SerialParameters,
    serial_jail: Option<&Minijail>,
    preserved_descriptors: Vec<RawDescriptor>,
    io_bus: &Bus,
) -> std::result::Result<(), DeviceRegistrationError> {
    match serial_jail.as_ref() {
        Some(jail) => {
            let com = Arc::new(Mutex::new(
                ProxyDevice::new(
                    com,
                    &jail
                        .try_clone()
                        .map_err(DeviceRegistrationError::CloneJail)?,
                    preserved_descriptors,
                )
                .map_err(DeviceRegistrationError::ProxyDeviceCreation)?,
            ));
            io_bus.insert(com, SERIAL_ADDR[com_num], 0x8).unwrap();
        }
        None => {
            let com = Arc::new(Mutex::new(com));
            io_bus.insert(com, SERIAL_ADDR[com_num], 0x8).unwrap();
        }
    }
    Ok(())
}