mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
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79e43ac534
This will allow making the code that handles bdf parsing simpler and remove the need for manual shifting. Signed-off-by: Rob Bradford <robert.bradford@intel.com>
124 lines
2.9 KiB
Rust
124 lines
2.9 KiB
Rust
// Copyright 2018 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE-BSD-3-Clause file.
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//! Implements pci devices and busses.
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#[macro_use]
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extern crate log;
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mod bus;
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mod configuration;
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mod device;
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mod msi;
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mod msix;
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mod vfio;
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mod vfio_user;
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pub use self::bus::{PciBus, PciConfigIo, PciConfigMmio, PciRoot, PciRootError};
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pub use self::configuration::{
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PciBarConfiguration, PciBarPrefetchable, PciBarRegionType, PciCapability, PciCapabilityId,
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PciClassCode, PciConfiguration, PciHeaderType, PciMassStorageSubclass,
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PciNetworkControllerSubclass, PciProgrammingInterface, PciSerialBusSubClass, PciSubclass,
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};
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pub use self::device::{
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BarReprogrammingParams, DeviceRelocation, Error as PciDeviceError, PciDevice,
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};
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pub use self::msi::{msi_num_enabled_vectors, MsiCap, MsiConfig};
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pub use self::msix::{MsixCap, MsixConfig, MsixTableEntry, MSIX_TABLE_ENTRY_SIZE};
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pub use self::vfio::{VfioPciDevice, VfioPciError};
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pub use self::vfio_user::{VfioUserDmaMapping, VfioUserPciDevice, VfioUserPciDeviceError};
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use std::fmt::Display;
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/// PCI has four interrupt pins A->D.
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#[derive(Copy, Clone)]
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pub enum PciInterruptPin {
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IntA,
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IntB,
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IntC,
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IntD,
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}
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impl PciInterruptPin {
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pub fn to_mask(self) -> u32 {
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self as u32
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}
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}
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#[cfg(target_arch = "x86_64")]
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pub const PCI_CONFIG_IO_PORT: u64 = 0xcf8;
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#[cfg(target_arch = "x86_64")]
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pub const PCI_CONFIG_IO_PORT_SIZE: u64 = 0x8;
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#[derive(Clone, Copy, PartialEq, PartialOrd)]
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pub struct PciBdf(u32);
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impl PciBdf {
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pub fn segment(&self) -> u16 {
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((self.0 >> 16) & 0xffff) as u16
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}
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pub fn bus(&self) -> u8 {
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((self.0 >> 8) & 0xff) as u8
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}
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pub fn device(&self) -> u8 {
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((self.0 >> 3) & 0x1f) as u8
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}
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pub fn function(&self) -> u8 {
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(self.0 & 0x7) as u8
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}
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pub fn new(segment: u16, bus: u8, device: u8, function: u8) -> Self {
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Self(
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(segment as u32) << 16
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| (bus as u32) << 8
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| ((device & 0x1f) as u32) << 3
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| (function & 0x7) as u32,
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)
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}
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}
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impl From<u32> for PciBdf {
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fn from(bdf: u32) -> Self {
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Self(bdf)
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}
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}
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impl From<PciBdf> for u32 {
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fn from(bdf: PciBdf) -> Self {
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bdf.0
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}
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}
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impl From<&PciBdf> for u32 {
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fn from(bdf: &PciBdf) -> Self {
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bdf.0
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}
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}
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impl From<PciBdf> for u16 {
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fn from(bdf: PciBdf) -> Self {
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(bdf.0 & 0xffff) as u16
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}
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}
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impl From<&PciBdf> for u16 {
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fn from(bdf: &PciBdf) -> Self {
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(bdf.0 & 0xffff) as u16
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}
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}
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impl Display for PciBdf {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(
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f,
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"{:04x}:{:02x}:{:02x}.{:01x}",
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self.segment(),
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self.bus(),
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self.device(),
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self.function()
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)
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}
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}
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