Merge tag 'driver-core-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

Pull driver core updates from Danilo Krummrich:
 "Auxiliary:
   - Drop call to dev_pm_domain_detach() in auxiliary_bus_probe()
   - Optimize logic of auxiliary_match_id()

  Rust:
   - Auxiliary:
      - Use primitive C types from prelude

   - DebugFs:
      - Add debugfs support for simple read/write files and custom
        callbacks through a File-type-based and directory-scope-based
        API
      - Sample driver code for the File-type-based API
      - Sample module code for the directory-scope-based API

   - I/O:
      - Add io::poll module and implement Rust specific
        read_poll_timeout() helper

   - IRQ:
      - Implement support for threaded and non-threaded device IRQs
        based on (&Device<Bound>, IRQ number) tuples (IrqRequest)
      - Provide &Device<Bound> cookie in IRQ handlers

   - PCI:
      - Support IRQ requests from IRQ vectors for a specific
        pci::Device<Bound>
      - Implement accessors for subsystem IDs, revision, devid and
        resource start
      - Provide dedicated pci::Vendor and pci::Class types for vendor
        and class ID numbers
      - Implement Display to print actual vendor and class names; Debug
        to print the raw ID numbers
      - Add pci::DeviceId::from_class_and_vendor() helper
      - Use primitive C types from prelude
      - Various minor inline and (safety) comment improvements

   - Platform:
      - Support IRQ requests from IRQ vectors for a specific
        platform::Device<Bound>

   - Nova:
      - Use pci::DeviceId::from_class_and_vendor() to avoid probing
        non-display/compute PCI functions

   - Misc:
      - Add helper for cpu_relax()
      - Update ARef import from sync::aref

  sysfs:
   - Remove bin_attrs_new field from struct attribute_group
   - Remove read_new() and write_new() from struct bin_attribute

  Misc:
   - Document potential race condition in get_dev_from_fwnode()
   - Constify node_group argument in software node registration
     functions
   - Fix order of kernel-doc parameters in various functions
   - Set power.no_pm flag for faux devices
   - Set power.no_callbacks flag along with the power.no_pm flag
   - Constify the pmu_bus bus type
   - Minor spelling fixes"

* tag 'driver-core-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (43 commits)
  rust: pci: display symbolic PCI vendor names
  rust: pci: display symbolic PCI class names
  rust: pci: fix incorrect platform reference in PCI driver probe doc comment
  rust: pci: fix incorrect platform reference in PCI driver unbind doc comment
  perf: make pmu_bus const
  samples: rust: Add scoped debugfs sample driver
  rust: debugfs: Add support for scoped directories
  samples: rust: Add debugfs sample driver
  rust: debugfs: Add support for callback-based files
  rust: debugfs: Add support for writable files
  rust: debugfs: Add support for read-only files
  rust: debugfs: Add initial support for directories
  driver core: auxiliary bus: Optimize logic of auxiliary_match_id()
  driver core: auxiliary bus: Drop dev_pm_domain_detach() call
  driver core: Fix order of the kernel-doc parameters
  driver core: get_dev_from_fwnode(): document potential race
  drivers: base: fix "publically"->"publicly"
  driver core/PM: Set power.no_callbacks along with power.no_pm
  driver core: faux: Set power.no_pm for faux devices
  rust: pci: inline several tiny functions
  ...

1 files changed, 177 insertions, 1 deletions

diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs
index 8f028c76f9fa..7205fe3416d3 100644
--- a/rust/kernel/platform.rs
+++ b/rust/kernel/platform.rs
@@ -10,6 +10,7 @@ use crate::{
     driver,
     error::{from_result, to_result, Result},
     io::{mem::IoRequest, Resource},
+    irq::{self, IrqRequest},
     of,
     prelude::*,
     types::Opaque,
@@ -284,6 +285,181 @@ impl Device<Bound> {
     }
 }
 
+macro_rules! define_irq_accessor_by_index {
+    (
+        $(#[$meta:meta])* $fn_name:ident,
+        $request_fn:ident,
+        $reg_type:ident,
+        $handler_trait:ident
+    ) => {
+        $(#[$meta])*
+        pub fn $fn_name<'a, T: irq::$handler_trait + 'static>(
+            &'a self,
+            flags: irq::Flags,
+            index: u32,
+            name: &'static CStr,
+            handler: impl PinInit<T, Error> + 'a,
+        ) -> Result<impl PinInit<irq::$reg_type<T>, Error> + 'a> {
+            let request = self.$request_fn(index)?;
+
+            Ok(irq::$reg_type::<T>::new(
+                request,
+                flags,
+                name,
+                handler,
+            ))
+        }
+    };
+}
+
+macro_rules! define_irq_accessor_by_name {
+    (
+        $(#[$meta:meta])* $fn_name:ident,
+        $request_fn:ident,
+        $reg_type:ident,
+        $handler_trait:ident
+    ) => {
+        $(#[$meta])*
+        pub fn $fn_name<'a, T: irq::$handler_trait + 'static>(
+            &'a self,
+            flags: irq::Flags,
+            irq_name: &CStr,
+            name: &'static CStr,
+            handler: impl PinInit<T, Error> + 'a,
+        ) -> Result<impl PinInit<irq::$reg_type<T>, Error> + 'a> {
+            let request = self.$request_fn(irq_name)?;
+
+            Ok(irq::$reg_type::<T>::new(
+                request,
+                flags,
+                name,
+                handler,
+            ))
+        }
+    };
+}
+
+impl Device<Bound> {
+    /// Returns an [`IrqRequest`] for the IRQ at the given index, if any.
+    pub fn irq_by_index(&self, index: u32) -> Result<IrqRequest<'_>> {
+        // SAFETY: `self.as_raw` returns a valid pointer to a `struct platform_device`.
+        let irq = unsafe { bindings::platform_get_irq(self.as_raw(), index) };
+
+        if irq < 0 {
+            return Err(Error::from_errno(irq));
+        }
+
+        // SAFETY: `irq` is guaranteed to be a valid IRQ number for `&self`.
+        Ok(unsafe { IrqRequest::new(self.as_ref(), irq as u32) })
+    }
+
+    /// Returns an [`IrqRequest`] for the IRQ at the given index, but does not
+    /// print an error if the IRQ cannot be obtained.
+    pub fn optional_irq_by_index(&self, index: u32) -> Result<IrqRequest<'_>> {
+        // SAFETY: `self.as_raw` returns a valid pointer to a `struct platform_device`.
+        let irq = unsafe { bindings::platform_get_irq_optional(self.as_raw(), index) };
+
+        if irq < 0 {
+            return Err(Error::from_errno(irq));
+        }
+
+        // SAFETY: `irq` is guaranteed to be a valid IRQ number for `&self`.
+        Ok(unsafe { IrqRequest::new(self.as_ref(), irq as u32) })
+    }
+
+    /// Returns an [`IrqRequest`] for the IRQ with the given name, if any.
+    pub fn irq_by_name(&self, name: &CStr) -> Result<IrqRequest<'_>> {
+        // SAFETY: `self.as_raw` returns a valid pointer to a `struct platform_device`.
+        let irq = unsafe { bindings::platform_get_irq_byname(self.as_raw(), name.as_char_ptr()) };
+
+        if irq < 0 {
+            return Err(Error::from_errno(irq));
+        }
+
+        // SAFETY: `irq` is guaranteed to be a valid IRQ number for `&self`.
+        Ok(unsafe { IrqRequest::new(self.as_ref(), irq as u32) })
+    }
+
+    /// Returns an [`IrqRequest`] for the IRQ with the given name, but does not
+    /// print an error if the IRQ cannot be obtained.
+    pub fn optional_irq_by_name(&self, name: &CStr) -> Result<IrqRequest<'_>> {
+        // SAFETY: `self.as_raw` returns a valid pointer to a `struct platform_device`.
+        let irq = unsafe {
+            bindings::platform_get_irq_byname_optional(self.as_raw(), name.as_char_ptr())
+        };
+
+        if irq < 0 {
+            return Err(Error::from_errno(irq));
+        }
+
+        // SAFETY: `irq` is guaranteed to be a valid IRQ number for `&self`.
+        Ok(unsafe { IrqRequest::new(self.as_ref(), irq as u32) })
+    }
+
+    define_irq_accessor_by_index!(
+        /// Returns a [`irq::Registration`] for the IRQ at the given index.
+        request_irq_by_index,
+        irq_by_index,
+        Registration,
+        Handler
+    );
+    define_irq_accessor_by_name!(
+        /// Returns a [`irq::Registration`] for the IRQ with the given name.
+        request_irq_by_name,
+        irq_by_name,
+        Registration,
+        Handler
+    );
+    define_irq_accessor_by_index!(
+        /// Does the same as [`Self::request_irq_by_index`], except that it does
+        /// not print an error message if the IRQ cannot be obtained.
+        request_optional_irq_by_index,
+        optional_irq_by_index,
+        Registration,
+        Handler
+    );
+    define_irq_accessor_by_name!(
+        /// Does the same as [`Self::request_irq_by_name`], except that it does
+        /// not print an error message if the IRQ cannot be obtained.
+        request_optional_irq_by_name,
+        optional_irq_by_name,
+        Registration,
+        Handler
+    );
+
+    define_irq_accessor_by_index!(
+        /// Returns a [`irq::ThreadedRegistration`] for the IRQ at the given index.
+        request_threaded_irq_by_index,
+        irq_by_index,
+        ThreadedRegistration,
+        ThreadedHandler
+    );
+    define_irq_accessor_by_name!(
+        /// Returns a [`irq::ThreadedRegistration`] for the IRQ with the given name.
+        request_threaded_irq_by_name,
+        irq_by_name,
+        ThreadedRegistration,
+        ThreadedHandler
+    );
+    define_irq_accessor_by_index!(
+        /// Does the same as [`Self::request_threaded_irq_by_index`], except
+        /// that it does not print an error message if the IRQ cannot be
+        /// obtained.
+        request_optional_threaded_irq_by_index,
+        optional_irq_by_index,
+        ThreadedRegistration,
+        ThreadedHandler
+    );
+    define_irq_accessor_by_name!(
+        /// Does the same as [`Self::request_threaded_irq_by_name`], except that
+        /// it does not print an error message if the IRQ cannot be obtained.
+        request_optional_threaded_irq_by_name,
+        optional_irq_by_name,
+        ThreadedRegistration,
+        ThreadedHandler
+    );
+}
+
 // SAFETY: `Device` is a transparent wrapper of a type that doesn't depend on `Device`'s generic
 // argument.
 kernel::impl_device_context_deref!(unsafe { Device });
@@ -292,7 +468,7 @@ kernel::impl_device_context_into_aref!(Device);
 impl crate::dma::Device for Device<device::Core> {}
 
 // SAFETY: Instances of `Device` are always reference-counted.
-unsafe impl crate::types::AlwaysRefCounted for Device {
+unsafe impl crate::sync::aref::AlwaysRefCounted for Device {
     fn inc_ref(&self) {
         // SAFETY: The existence of a shared reference guarantees that the refcount is non-zero.
         unsafe { bindings::get_device(self.as_ref().as_raw()) };