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feat: more pci work

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This commit is contained in:
Alex Zenla
2024-04-25 23:36:52 -07:00
parent 5dea89f644
commit 97c4880605
5 changed files with 409 additions and 31 deletions
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30
crates/xen/xenclient/src/pci.rs
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@ -52,9 +52,22 @@ impl XenPciBackend {
Ok(fs::try_exists(path).await?)
}
pub async fn read_irq(&self, bdf: &PciBdf) -> Result<Option<u32>> {
let mut path: PathBuf = self.path.clone();
path.push(bdf.to_string());
path.push("irq");
if !path.exists() {
return Ok(None);
}
let content = fs::read_to_string(&path).await?;
Ok(u32::from_str(content.trim()).ok())
}
pub async fn read_resources(&self, bdf: &PciBdf) -> Result<Vec<PciMemoryResource>> {
let mut resources = Vec::new();
let mut path = self.path.clone();
let mut path: PathBuf = self.path.clone();
path.push(bdf.to_string());
path.push("resource");
let content = fs::read_to_string(&path).await?;
@ -112,6 +125,13 @@ impl XenPciBackend {
}
Ok(false)
}
pub async fn reset(&self, bdf: &PciBdf) -> Result<()> {
let mut path: PathBuf = self.path.clone();
path.push("do_flr");
fs::write(&path, bdf.to_string()).await?;
Ok(())
}
}
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
@ -149,6 +169,14 @@ impl PciBdf {
vdefn: self.vdefn,
}
}
pub fn encode(&self) -> u32 {
let mut value = self.domain.unwrap_or(0) << 16u32;
value |= ((self.bus & 0xff) << 8u32) as u32;
value |= ((self.device & 0x1f) << 3u32) as u32;
value |= (self.function & 0x7) as u32;
value
}
}
impl FromStr for PciBdf {