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vmm: move BAR mapping registration from PciBus to DeviceManager

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`PciBus::register_mapping()` operates on `mmio_bus` and `io_bus`
which are passed in as external parameters and have nothing to do
with PciBus internal state. Move this logic into
`DeviceManager::register_bar_mapping()` where it belongs, and move
the `PioInsert`/`MmioInsert` error variants from `PciRootError` to
`DeviceManagerError` accordingly.

Signed-off-by: wuxinyue <wuxinyue.wxy@antgroup.com>
Assisted-by: Claude:Opus-4.6
This commit is contained in:
wuxinyue
2026-06-11 10:54:42 +08:00
committed by Rob Bradford
parent bf4b856dd2
commit f787bd7a17
2 changed files with 41 additions and 50 deletions
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39
pci/src/bus.rs
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@@ -13,12 +13,9 @@ use std::sync::{Arc, Barrier, Mutex};
use byteorder::{ByteOrder, LittleEndian};
use log::warn;
use thiserror::Error;
use vm_device::{Bus, BusDevice, BusDeviceSync};
use vm_device::BusDevice;
use crate::PciBarConfiguration;
use crate::configuration::{
PciBarRegionType, PciBridgeSubclass, PciClassCode, PciConfiguration, PciHeaderType,
};
use crate::configuration::{PciBridgeSubclass, PciClassCode, PciConfiguration, PciHeaderType};
use crate::device::{BarReprogrammingParams, DeviceRelocation, Error as PciDeviceError, PciDevice};
/// Denotes the PCI device ID of a bus' root bridge device.
@@ -38,12 +35,6 @@ pub enum PciRootError {
/// Could not allocate an IRQ number.
#[error("Could not allocate an IRQ number")]
AllocateIrq,
/// Could not add a device to the port io bus.
#[error("Could not add a device to the port io bus")]
PioInsert(#[source] vm_device::BusError),
/// Could not add a device to the mmio bus.
#[error("Could not add a device to the mmio bus")]
MmioInsert(#[source] vm_device::BusError),
/// Could not find an available device slot on the PCI bus.
#[error("Could not find an available device slot on the PCI bus")]
NoPciDeviceSlotAvailable,
@@ -145,31 +136,6 @@ impl PciBus {
}
}
#[expect(clippy::needless_pass_by_value)]
pub fn register_mapping(
&self,
dev: Arc<dyn BusDeviceSync>,
io_bus: &Bus,
mmio_bus: &Bus,
bars: Vec<PciBarConfiguration>,
) -> Result<()> {
for bar in bars {
match bar.region_type() {
PciBarRegionType::IoRegion => {
io_bus
.insert(dev.clone(), bar.addr(), bar.size())
.map_err(PciRootError::PioInsert)?;
}
PciBarRegionType::Memory32BitRegion | PciBarRegionType::Memory64BitRegion => {
mmio_bus
.insert(dev.clone(), bar.addr(), bar.size())
.map_err(PciRootError::MmioInsert)?;
}
}
}
Ok(())
}
pub fn add_device(&mut self, device_id: u8, device: Arc<Mutex<dyn PciDevice>>) -> Result<()> {
self.devices.insert(device_id, device);
Ok(())
@@ -559,6 +525,7 @@ mod unit_tests {
use std::result::Result;
use super::*;
use crate::configuration::PciBarRegionType;
#[derive(Debug)]
/// Helper struct that mocks the implementation of DeviceRelocation