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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127// SPDX-License-Identifier: GPL-2.0// SPDX-FileCopyrightText: Copyright 2025 Collabora ltd.
use crate::bindings;use crate::prelude::*;
/// Flags to be used when registering IRQ handlers.////// Flags can be used to request specific behaviors when registering an IRQ/// handler, and can be combined using the `|`, `&`, and `!` operators to/// further control the system's behavior.////// A common use case is to register a shared interrupt, as sharing the line/// between devices is increasingly common in modern systems and is even/// required for some buses. This requires setting [`Flags::SHARED`] when/// requesting the interrupt. Other use cases include setting the trigger type/// through `Flags::TRIGGER_*`, which determines when the interrupt fires, or/// controlling whether the interrupt is masked after the handler runs by using/// [`Flags::ONESHOT`].////// If an invalid combination of flags is provided, the system will refuse to/// register the handler, and lower layers will enforce certain flags when/// necessary. This means, for example, that all the/// [`crate::irq::Registration`] for a shared interrupt have to agree on/// [`Flags::SHARED`] and on the same trigger type, if set.#[derive(Clone, Copy, PartialEq, Eq)]pub struct Flags(c_ulong);
impl Flags { /// Use the interrupt line as already configured. pub const TRIGGER_NONE: Flags = Flags::new(bindings::IRQF_TRIGGER_NONE);
/// The interrupt is triggered when the signal goes from low to high. pub const TRIGGER_RISING: Flags = Flags::new(bindings::IRQF_TRIGGER_RISING);
/// The interrupt is triggered when the signal goes from high to low. pub const TRIGGER_FALLING: Flags = Flags::new(bindings::IRQF_TRIGGER_FALLING);
/// The interrupt is triggered while the signal is held high. pub const TRIGGER_HIGH: Flags = Flags::new(bindings::IRQF_TRIGGER_HIGH);
/// The interrupt is triggered while the signal is held low. pub const TRIGGER_LOW: Flags = Flags::new(bindings::IRQF_TRIGGER_LOW);
/// Allow sharing the IRQ among several devices. pub const SHARED: Flags = Flags::new(bindings::IRQF_SHARED);
/// Set by callers when they expect sharing mismatches to occur. pub const PROBE_SHARED: Flags = Flags::new(bindings::IRQF_PROBE_SHARED);
/// Flag to mark this interrupt as timer interrupt. pub const TIMER: Flags = Flags::new(bindings::IRQF_TIMER);
/// Interrupt is per CPU. pub const PERCPU: Flags = Flags::new(bindings::IRQF_PERCPU);
/// Flag to exclude this interrupt from irq balancing. pub const NOBALANCING: Flags = Flags::new(bindings::IRQF_NOBALANCING);
/// Interrupt is used for polling (only the interrupt that is registered /// first in a shared interrupt is considered for performance reasons). pub const IRQPOLL: Flags = Flags::new(bindings::IRQF_IRQPOLL);
/// Interrupt is not re-enabled after the hardirq handler finished. Used by /// threaded interrupts which need to keep the irq line disabled until the /// threaded handler has been run. pub const ONESHOT: Flags = Flags::new(bindings::IRQF_ONESHOT);
/// Do not disable this IRQ during suspend. Does not guarantee that this /// interrupt will wake the system from a suspended state. pub const NO_SUSPEND: Flags = Flags::new(bindings::IRQF_NO_SUSPEND);
/// Force enable it on resume even if [`Flags::NO_SUSPEND`] is set. pub const FORCE_RESUME: Flags = Flags::new(bindings::IRQF_FORCE_RESUME);
/// Interrupt cannot be threaded. pub const NO_THREAD: Flags = Flags::new(bindings::IRQF_NO_THREAD);
/// Resume IRQ early during syscore instead of at device resume time. pub const EARLY_RESUME: Flags = Flags::new(bindings::IRQF_EARLY_RESUME);
/// If the IRQ is shared with a [`Flags::NO_SUSPEND`] user, execute this /// interrupt handler after suspending interrupts. For system wakeup devices /// users need to implement wakeup detection in their interrupt handlers. pub const COND_SUSPEND: Flags = Flags::new(bindings::IRQF_COND_SUSPEND);
/// Don't enable IRQ or NMI automatically when users request it. Users will /// enable it explicitly by `enable_irq` or `enable_nmi` later. pub const NO_AUTOEN: Flags = Flags::new(bindings::IRQF_NO_AUTOEN);
/// Exclude from runnaway detection for IPI and similar handlers, depends on /// `PERCPU`. pub const NO_DEBUG: Flags = Flags::new(bindings::IRQF_NO_DEBUG);
pub(crate) fn into_inner(self) -> c_ulong { self.0 }
// Always inline to optimize out error path of `build_assert`. #[inline(always)] const fn new(value: u32) -> Self { build_assert!(value as u64 <= c_ulong::MAX as u64); Self(value as c_ulong) }}
impl core::ops::BitOr for Flags { type Output = Self; fn bitor(self, rhs: Self) -> Self::Output { Self(self.0 | rhs.0) }}
impl core::ops::BitAnd for Flags { type Output = Self; fn bitand(self, rhs: Self) -> Self::Output { Self(self.0 & rhs.0) }}
impl core::ops::Not for Flags { type Output = Self; fn not(self) -> Self::Output { Self(!self.0) }}