pcid: Move spawning and interacting with subdrivers out of main.rs
This commit is contained in:
bjorn3
@@ -0,0 +1,331 @@
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use std::fs::File;
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use std::os::unix::io::{FromRawFd, RawFd};
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use std::process::Command;
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use std::sync::Arc;
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use std::thread;
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use log::{error, info};
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use pci_types::PciAddress;
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use crate::driver_interface;
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use crate::pci::cap::Capability as PciCapability;
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use crate::pci::PciFunc;
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use crate::State;
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pub struct DriverHandler {
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addr: PciAddress,
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capabilities: Vec<(u8, PciCapability)>,
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state: Arc<State>,
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}
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impl DriverHandler {
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pub fn spawn(
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state: Arc<State>,
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func: driver_interface::PciFunction,
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capabilities: Vec<(u8, PciCapability)>,
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args: &[String],
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) {
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let subdriver_args = driver_interface::SubdriverArguments { func };
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let mut args = args.iter();
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if let Some(program) = args.next() {
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let mut command = Command::new(program);
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for arg in args {
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if arg.starts_with("$") {
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panic!("support for $VARIABLE has been removed. use pcid_interface instead");
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}
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command.arg(arg);
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}
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info!("PCID SPAWN {:?}", command);
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// TODO: libc wrapper?
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let [fds1, fds2] = unsafe {
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let mut fds1 = [0 as libc::c_int; 2];
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let mut fds2 = [0 as libc::c_int; 2];
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assert_eq!(
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libc::pipe(fds1.as_mut_ptr()),
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0,
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"pcid: failed to create pcid->client pipe"
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);
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assert_eq!(
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libc::pipe(fds2.as_mut_ptr()),
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0,
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"pcid: failed to create client->pcid pipe"
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);
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[fds1.map(|c| c as usize), fds2.map(|c| c as usize)]
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};
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let [pcid_to_client_read, pcid_to_client_write] = fds1;
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let [pcid_from_client_read, pcid_from_client_write] = fds2;
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let envs = vec![
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("PCID_TO_CLIENT_FD", format!("{}", pcid_to_client_read)),
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("PCID_FROM_CLIENT_FD", format!("{}", pcid_from_client_write)),
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];
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match command.envs(envs).spawn() {
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Ok(mut child) => {
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let driver_handler = DriverHandler {
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addr: func.addr,
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state,
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capabilities,
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};
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let _handle = thread::spawn(move || {
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driver_handler.handle_spawn(
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pcid_to_client_write,
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pcid_from_client_read,
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subdriver_args,
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);
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});
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// FIXME this currently deadlocks as pcid doesn't daemonize
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//state.threads.lock().unwrap().push(handle);
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match child.wait() {
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Ok(_status) => (),
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Err(err) => error!("pcid: failed to wait for {:?}: {}", command, err),
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}
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}
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Err(err) => error!("pcid: failed to execute {:?}: {}", command, err),
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}
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}
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}
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fn respond(
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&mut self,
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request: driver_interface::PcidClientRequest,
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args: &driver_interface::SubdriverArguments,
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) -> driver_interface::PcidClientResponse {
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use crate::pci::cap::{MsiCapability, MsixCapability};
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use driver_interface::*;
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let func = PciFunc {
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pci: &self.state.pcie,
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addr: self.addr,
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};
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match request {
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PcidClientRequest::RequestCapabilities => PcidClientResponse::Capabilities(
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self.capabilities
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.iter()
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.map(|(_, capability)| capability.clone())
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.collect::<Vec<_>>(),
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),
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PcidClientRequest::RequestConfig => PcidClientResponse::Config(args.clone()),
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PcidClientRequest::RequestFeatures => PcidClientResponse::AllFeatures(
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self.capabilities
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.iter()
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.filter_map(|(_, capability)| match capability {
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PciCapability::Msi(msi) => {
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Some((PciFeature::Msi, FeatureStatus::enabled(msi.enabled())))
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}
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PciCapability::MsiX(msix) => Some((
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PciFeature::MsiX,
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FeatureStatus::enabled(msix.msix_enabled()),
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)),
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_ => None,
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})
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.collect(),
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),
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PcidClientRequest::EnableFeature(feature) => match feature {
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PciFeature::Msi => {
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let (offset, capability): (u8, &mut MsiCapability) = match self
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.capabilities
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.iter_mut()
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.find_map(|&mut (offset, ref mut capability)| {
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capability.as_msi_mut().map(|cap| (offset, cap))
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}) {
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Some(tuple) => tuple,
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None => {
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return PcidClientResponse::Error(
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PcidServerResponseError::NonexistentFeature(feature),
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)
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}
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};
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unsafe {
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capability.set_enabled(true);
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capability.write_message_control(&func, offset);
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}
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PcidClientResponse::FeatureEnabled(feature)
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}
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PciFeature::MsiX => {
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let (offset, capability): (u8, &mut MsixCapability) = match self
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.capabilities
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.iter_mut()
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.find_map(|&mut (offset, ref mut capability)| {
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capability.as_msix_mut().map(|cap| (offset, cap))
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}) {
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Some(tuple) => tuple,
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None => {
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return PcidClientResponse::Error(
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PcidServerResponseError::NonexistentFeature(feature),
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)
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}
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};
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unsafe {
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capability.set_msix_enabled(true);
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capability.write_a(&func, offset);
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}
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PcidClientResponse::FeatureEnabled(feature)
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}
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},
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PcidClientRequest::FeatureStatus(feature) => PcidClientResponse::FeatureStatus(
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feature,
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match feature {
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PciFeature::Msi => self
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.capabilities
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.iter()
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.find_map(|(_, capability)| {
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if let PciCapability::Msi(msi) = capability {
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Some(FeatureStatus::enabled(msi.enabled()))
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} else {
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None
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}
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})
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.unwrap_or(FeatureStatus::Disabled),
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PciFeature::MsiX => self
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.capabilities
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.iter()
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.find_map(|(_, capability)| {
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if let PciCapability::MsiX(msix) = capability {
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Some(FeatureStatus::enabled(msix.msix_enabled()))
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} else {
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None
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}
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})
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.unwrap_or(FeatureStatus::Disabled),
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},
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),
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PcidClientRequest::FeatureInfo(feature) => PcidClientResponse::FeatureInfo(
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feature,
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match feature {
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PciFeature::Msi => {
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if let Some(info) = self
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.capabilities
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.iter()
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.find_map(|(_, capability)| capability.as_msi())
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{
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PciFeatureInfo::Msi(*info)
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} else {
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return PcidClientResponse::Error(
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PcidServerResponseError::NonexistentFeature(feature),
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);
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}
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}
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PciFeature::MsiX => {
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if let Some(info) = self
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.capabilities
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.iter()
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.find_map(|(_, capability)| capability.as_msix())
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{
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PciFeatureInfo::MsiX(*info)
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} else {
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return PcidClientResponse::Error(
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PcidServerResponseError::NonexistentFeature(feature),
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);
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}
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}
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},
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),
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PcidClientRequest::SetFeatureInfo(info_to_set) => match info_to_set {
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SetFeatureInfo::Msi(info_to_set) => {
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if let Some((offset, info)) = self
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.capabilities
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.iter_mut()
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.find_map(|(offset, capability)| Some((*offset, capability.as_msi_mut()?)))
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{
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if let Some(mme) = info_to_set.multi_message_enable {
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if info.multi_message_capable() < mme || mme > 0b101 {
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return PcidClientResponse::Error(
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PcidServerResponseError::InvalidBitPattern,
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);
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}
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info.set_multi_message_enable(mme);
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}
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if let Some(message_addr_and_data) = info_to_set.message_address_and_data {
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let message_addr = message_addr_and_data.addr;
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if message_addr & 0b11 != 0 {
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return PcidClientResponse::Error(
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PcidServerResponseError::InvalidBitPattern,
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);
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}
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info.set_message_address(message_addr as u32);
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info.set_message_upper_address((message_addr >> 32) as u32);
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if message_addr_and_data.data & ((1 << info.multi_message_enable()) - 1)
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!= 0
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{
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return PcidClientResponse::Error(
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PcidServerResponseError::InvalidBitPattern,
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);
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}
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info.set_message_data(
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message_addr_and_data
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.data
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.try_into()
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.expect("pcid: MSI message data too big"),
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);
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}
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if let Some(mask_bits) = info_to_set.mask_bits {
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info.set_mask_bits(mask_bits);
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}
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unsafe {
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info.write_all(&func, offset);
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}
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PcidClientResponse::SetFeatureInfo(PciFeature::Msi)
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} else {
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return PcidClientResponse::Error(
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PcidServerResponseError::NonexistentFeature(PciFeature::Msi),
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);
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}
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}
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SetFeatureInfo::MsiX { function_mask } => {
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if let Some((offset, info)) = self
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.capabilities
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.iter_mut()
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.find_map(|(offset, capability)| Some((*offset, capability.as_msix_mut()?)))
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{
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if let Some(mask) = function_mask {
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info.set_function_mask(mask);
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unsafe {
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info.write_a(&func, offset);
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}
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}
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PcidClientResponse::SetFeatureInfo(PciFeature::MsiX)
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} else {
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return PcidClientResponse::Error(
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PcidServerResponseError::NonexistentFeature(PciFeature::MsiX),
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);
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}
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}
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},
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PcidClientRequest::ReadConfig(offset) => {
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let value = unsafe { func.read_u32(offset) };
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return PcidClientResponse::ReadConfig(value);
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}
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PcidClientRequest::WriteConfig(offset, value) => {
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unsafe {
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func.write_u32(offset, value);
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}
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return PcidClientResponse::WriteConfig;
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}
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}
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}
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fn handle_spawn(
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mut self,
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pcid_to_client_write: usize,
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pcid_from_client_read: usize,
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args: driver_interface::SubdriverArguments,
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) {
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use driver_interface::*;
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let mut pcid_to_client = unsafe { File::from_raw_fd(pcid_to_client_write as RawFd) };
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let mut pcid_from_client = unsafe { File::from_raw_fd(pcid_from_client_read as RawFd) };
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while let Ok(msg) = recv(&mut pcid_from_client) {
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let response = self.respond(msg, &args);
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send(&mut pcid_to_client, &response).unwrap();
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}
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}
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}
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+3
-214
@@ -1,24 +1,22 @@
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use std::fs::{File, metadata, read_dir};
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use std::io::prelude::*;
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use std::os::unix::io::{FromRawFd, RawFd};
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use std::process::Command;
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use std::thread;
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use std::sync::{Arc, Mutex};
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use pci_types::{CommandRegister, PciAddress};
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use structopt::StructOpt;
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use log::{debug, error, info, warn, trace};
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use log::{debug, info, warn, trace};
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use redox_log::{OutputBuilder, RedoxLogger};
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use crate::cfg_access::Pcie;
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use crate::config::Config;
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use crate::driver_interface::LegacyInterruptLine;
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use crate::pci::PciFunc;
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use crate::pci::cap::Capability as PciCapability;
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use crate::pci_header::{PciEndpointHeader, PciHeader, PciHeaderError};
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mod cfg_access;
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mod config;
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mod driver_handler;
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mod driver_interface;
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mod pci;
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mod pci_header;
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@@ -35,158 +33,6 @@ struct Args {
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config_path: Option<String>,
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}
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pub struct DriverHandler {
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addr: PciAddress,
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capabilities: Vec<(u8, PciCapability)>,
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state: Arc<State>,
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}
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impl DriverHandler {
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fn respond(&mut self, request: driver_interface::PcidClientRequest, args: &driver_interface::SubdriverArguments) -> driver_interface::PcidClientResponse {
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use driver_interface::*;
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use crate::pci::cap::{MsiCapability, MsixCapability};
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let func = PciFunc {
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pci: &self.state.pcie,
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addr: self.addr,
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};
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match request {
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PcidClientRequest::RequestCapabilities => {
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PcidClientResponse::Capabilities(self.capabilities.iter().map(|(_, capability)| capability.clone()).collect::<Vec<_>>())
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}
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PcidClientRequest::RequestConfig => {
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PcidClientResponse::Config(args.clone())
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}
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PcidClientRequest::RequestFeatures => {
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PcidClientResponse::AllFeatures(self.capabilities.iter().filter_map(|(_, capability)| match capability {
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PciCapability::Msi(msi) => Some((PciFeature::Msi, FeatureStatus::enabled(msi.enabled()))),
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PciCapability::MsiX(msix) => Some((PciFeature::MsiX, FeatureStatus::enabled(msix.msix_enabled()))),
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_ => None,
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}).collect())
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}
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PcidClientRequest::EnableFeature(feature) => match feature {
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PciFeature::Msi => {
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let (offset, capability): (u8, &mut MsiCapability) = match self.capabilities.iter_mut().find_map(|&mut (offset, ref mut capability)| capability.as_msi_mut().map(|cap| (offset, cap))) {
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Some(tuple) => tuple,
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None => return PcidClientResponse::Error(PcidServerResponseError::NonexistentFeature(feature)),
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};
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unsafe {
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capability.set_enabled(true);
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capability.write_message_control(&func, offset);
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}
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PcidClientResponse::FeatureEnabled(feature)
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}
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PciFeature::MsiX => {
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let (offset, capability): (u8, &mut MsixCapability) = match self.capabilities.iter_mut().find_map(|&mut (offset, ref mut capability)| capability.as_msix_mut().map(|cap| (offset, cap))) {
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Some(tuple) => tuple,
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None => return PcidClientResponse::Error(PcidServerResponseError::NonexistentFeature(feature)),
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};
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unsafe {
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capability.set_msix_enabled(true);
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capability.write_a(&func, offset);
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}
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PcidClientResponse::FeatureEnabled(feature)
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}
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}
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PcidClientRequest::FeatureStatus(feature) => PcidClientResponse::FeatureStatus(feature, match feature {
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PciFeature::Msi => self.capabilities.iter().find_map(|(_, capability)| if let PciCapability::Msi(msi) = capability {
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Some(FeatureStatus::enabled(msi.enabled()))
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} else {
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None
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}).unwrap_or(FeatureStatus::Disabled),
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PciFeature::MsiX => self.capabilities.iter().find_map(|(_, capability)| if let PciCapability::MsiX(msix) = capability {
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Some(FeatureStatus::enabled(msix.msix_enabled()))
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} else {
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None
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}).unwrap_or(FeatureStatus::Disabled),
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}),
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PcidClientRequest::FeatureInfo(feature) => PcidClientResponse::FeatureInfo(feature, match feature {
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PciFeature::Msi => if let Some(info) = self.capabilities.iter().find_map(|(_, capability)| capability.as_msi()) {
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PciFeatureInfo::Msi(*info)
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} else {
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return PcidClientResponse::Error(PcidServerResponseError::NonexistentFeature(feature));
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}
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PciFeature::MsiX => if let Some(info) = self.capabilities.iter().find_map(|(_, capability)| capability.as_msix()) {
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PciFeatureInfo::MsiX(*info)
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} else {
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return PcidClientResponse::Error(PcidServerResponseError::NonexistentFeature(feature));
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}
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}),
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PcidClientRequest::SetFeatureInfo(info_to_set) => match info_to_set {
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SetFeatureInfo::Msi(info_to_set) => if let Some((offset, info)) = self.capabilities.iter_mut().find_map(|(offset, capability)| Some((*offset, capability.as_msi_mut()?))) {
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if let Some(mme) = info_to_set.multi_message_enable {
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if info.multi_message_capable() < mme || mme > 0b101 {
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return PcidClientResponse::Error(PcidServerResponseError::InvalidBitPattern);
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}
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info.set_multi_message_enable(mme);
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}
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if let Some(message_addr_and_data) = info_to_set.message_address_and_data {
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let message_addr = message_addr_and_data.addr;
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if message_addr & 0b11 != 0 {
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return PcidClientResponse::Error(PcidServerResponseError::InvalidBitPattern);
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}
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info.set_message_address(message_addr as u32);
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info.set_message_upper_address((message_addr >> 32) as u32);
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if message_addr_and_data.data & ((1 << info.multi_message_enable()) - 1) != 0 {
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return PcidClientResponse::Error(PcidServerResponseError::InvalidBitPattern);
|
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}
|
||||
info.set_message_data(
|
||||
message_addr_and_data
|
||||
.data
|
||||
.try_into()
|
||||
.expect("pcid: MSI message data too big"),
|
||||
);
|
||||
}
|
||||
if let Some(mask_bits) = info_to_set.mask_bits {
|
||||
info.set_mask_bits(mask_bits);
|
||||
}
|
||||
unsafe {
|
||||
info.write_all(&func, offset);
|
||||
}
|
||||
PcidClientResponse::SetFeatureInfo(PciFeature::Msi)
|
||||
} else {
|
||||
return PcidClientResponse::Error(PcidServerResponseError::NonexistentFeature(PciFeature::Msi));
|
||||
}
|
||||
SetFeatureInfo::MsiX { function_mask } => if let Some((offset, info)) = self.capabilities.iter_mut().find_map(|(offset, capability)| Some((*offset, capability.as_msix_mut()?))) {
|
||||
if let Some(mask) = function_mask {
|
||||
info.set_function_mask(mask);
|
||||
unsafe {
|
||||
info.write_a(&func, offset);
|
||||
}
|
||||
}
|
||||
PcidClientResponse::SetFeatureInfo(PciFeature::MsiX)
|
||||
} else {
|
||||
return PcidClientResponse::Error(PcidServerResponseError::NonexistentFeature(PciFeature::MsiX));
|
||||
}
|
||||
}
|
||||
PcidClientRequest::ReadConfig(offset) => {
|
||||
let value = unsafe { func.read_u32(offset) };
|
||||
return PcidClientResponse::ReadConfig(value);
|
||||
},
|
||||
PcidClientRequest::WriteConfig(offset, value) => {
|
||||
unsafe {
|
||||
func.write_u32(offset, value);
|
||||
}
|
||||
return PcidClientResponse::WriteConfig;
|
||||
}
|
||||
}
|
||||
}
|
||||
fn handle_spawn(mut self, pcid_to_client_write: usize, pcid_from_client_read: usize, args: driver_interface::SubdriverArguments) {
|
||||
use driver_interface::*;
|
||||
|
||||
let mut pcid_to_client = unsafe { File::from_raw_fd(pcid_to_client_write as RawFd) };
|
||||
let mut pcid_from_client = unsafe { File::from_raw_fd(pcid_from_client_read as RawFd) };
|
||||
|
||||
while let Ok(msg) = recv(&mut pcid_from_client) {
|
||||
let response = self.respond(msg, &args);
|
||||
send(&mut pcid_to_client, &response).unwrap();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub struct State {
|
||||
threads: Mutex<Vec<thread::JoinHandle<()>>>,
|
||||
pcie: Pcie,
|
||||
@@ -268,64 +114,7 @@ fn handle_parsed_header(state: Arc<State>, config: &Config, header: PciEndpointH
|
||||
full_device_id: header.full_device_id().clone(),
|
||||
};
|
||||
|
||||
let subdriver_args = driver_interface::SubdriverArguments {
|
||||
func,
|
||||
};
|
||||
|
||||
let mut args = args.iter();
|
||||
if let Some(program) = args.next() {
|
||||
let mut command = Command::new(program);
|
||||
for arg in args {
|
||||
if arg.starts_with("$") {
|
||||
panic!("support for $VARIABLE has been removed. use pcid_interface instead");
|
||||
}
|
||||
command.arg(arg);
|
||||
}
|
||||
|
||||
info!("PCID SPAWN {:?}", command);
|
||||
|
||||
// TODO: libc wrapper?
|
||||
let [fds1, fds2] = unsafe {
|
||||
let mut fds1 = [0 as libc::c_int; 2];
|
||||
let mut fds2 = [0 as libc::c_int; 2];
|
||||
|
||||
assert_eq!(libc::pipe(fds1.as_mut_ptr()), 0, "pcid: failed to create pcid->client pipe");
|
||||
assert_eq!(libc::pipe(fds2.as_mut_ptr()), 0, "pcid: failed to create client->pcid pipe");
|
||||
|
||||
[
|
||||
fds1.map(|c| c as usize),
|
||||
fds2.map(|c| c as usize),
|
||||
]
|
||||
};
|
||||
|
||||
let [pcid_to_client_read, pcid_to_client_write] = fds1;
|
||||
let [pcid_from_client_read, pcid_from_client_write] = fds2;
|
||||
|
||||
let envs = vec![
|
||||
("PCID_TO_CLIENT_FD", format!("{}", pcid_to_client_read)),
|
||||
("PCID_FROM_CLIENT_FD", format!("{}", pcid_from_client_write)),
|
||||
];
|
||||
|
||||
match command.envs(envs).spawn() {
|
||||
Ok(mut child) => {
|
||||
let driver_handler = DriverHandler {
|
||||
addr: header.address(),
|
||||
state: Arc::clone(&state),
|
||||
capabilities,
|
||||
};
|
||||
let _handle = thread::spawn(move || {
|
||||
driver_handler.handle_spawn(pcid_to_client_write, pcid_from_client_read, subdriver_args);
|
||||
});
|
||||
// FIXME this currently deadlocks as pcid doesn't daemonize
|
||||
//state.threads.lock().unwrap().push(handle);
|
||||
match child.wait() {
|
||||
Ok(_status) => (),
|
||||
Err(err) => error!("pcid: failed to wait for {:?}: {}", command, err),
|
||||
}
|
||||
}
|
||||
Err(err) => error!("pcid: failed to execute {:?}: {}", command, err)
|
||||
}
|
||||
}
|
||||
driver_handler::DriverHandler::spawn(Arc::clone(&state), func, capabilities, args);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user