64 lines
2.4 KiB
Rust
64 lines
2.4 KiB
Rust
use alloc::collections::btree_map::BTreeMap;
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use libk::error::Error;
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use crate::device::{PciInterrupt, PciInterruptRoute};
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#[derive(Debug)]
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pub enum PciInterruptMap {
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Fixed(BTreeMap<PciInterrupt, PciInterruptRoute>),
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#[cfg(any(target_arch = "x86_64", rust_analyzer))]
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Acpi(alloc::string::String),
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Legacy,
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}
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impl PciInterruptMap {
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pub fn map_interrupt(&self, interrupt: &PciInterrupt) -> Result<PciInterruptRoute, Error> {
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match self {
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Self::Fixed(map) => map.get(interrupt).cloned().ok_or(Error::DoesNotExist),
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#[cfg(any(target_arch = "x86_64", rust_analyzer))]
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Self::Acpi(aml_object_name) => {
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use device_api::interrupt::{IrqLevel, IrqOptions, IrqTrigger};
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use crate::device::PciInterruptPin;
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let aml_pin = match interrupt.pin {
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PciInterruptPin::A => ygg_driver_acpi::PciPin::IntA,
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PciInterruptPin::B => ygg_driver_acpi::PciPin::IntB,
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PciInterruptPin::C => ygg_driver_acpi::PciPin::IntC,
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PciInterruptPin::D => ygg_driver_acpi::PciPin::IntD,
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};
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let aml_route = ygg_driver_acpi::get_pci_route(
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aml_object_name.as_str(),
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interrupt.address.device as u16,
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interrupt.address.function as u16,
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aml_pin,
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)
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.or_else(|| {
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ygg_driver_acpi::get_pci_route(
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aml_object_name.as_str(),
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interrupt.address.device as u16,
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0xFFFF,
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aml_pin,
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)
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})
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.ok_or(Error::DoesNotExist)?;
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let trigger = match aml_route.trigger {
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ygg_driver_acpi::InterruptTrigger::Edge => IrqTrigger::Edge,
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ygg_driver_acpi::InterruptTrigger::Level => IrqTrigger::Level,
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};
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let level = match aml_route.polarity {
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ygg_driver_acpi::InterruptPolarity::ActiveLow => IrqLevel::ActiveLow,
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ygg_driver_acpi::InterruptPolarity::ActiveHigh => IrqLevel::ActiveHigh,
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};
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Ok(PciInterruptRoute {
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options: IrqOptions { trigger, level },
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number: aml_route.irq,
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})
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}
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Self::Legacy => todo!(),
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}
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}
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}
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