1 files changed, 128 insertions, 0 deletions
diff --git a/samples/rust/rust_driver_auxiliary.rs b/samples/rust/rust_driver_auxiliary.rs
new file mode 100644
index 000000000000..5761ea314f44
--- /dev/null
+++ b/samples/rust/rust_driver_auxiliary.rs
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! Rust auxiliary driver sample (based on a PCI driver for QEMU's `pci-testdev`).
+//!
+//! To make this driver probe, QEMU must be run with `-device pci-testdev`.
+
+use kernel::{
+    auxiliary, c_str,
+    device::{Bound, Core},
+    devres::Devres,
+    driver,
+    error::Error,
+    pci,
+    prelude::*,
+    InPlaceModule,
+};
+
+use core::any::TypeId;
+use pin_init::PinInit;
+
+const MODULE_NAME: &CStr = <LocalModule as kernel::ModuleMetadata>::NAME;
+const AUXILIARY_NAME: &CStr = c_str!("auxiliary");
+
+struct AuxiliaryDriver;
+
+kernel::auxiliary_device_table!(
+    AUX_TABLE,
+    MODULE_AUX_TABLE,
+    <AuxiliaryDriver as auxiliary::Driver>::IdInfo,
+    [(auxiliary::DeviceId::new(MODULE_NAME, AUXILIARY_NAME), ())]
+);
+
+impl auxiliary::Driver for AuxiliaryDriver {
+    type IdInfo = ();
+
+    const ID_TABLE: auxiliary::IdTable<Self::IdInfo> = &AUX_TABLE;
+
+    fn probe(adev: &auxiliary::Device<Core>, _info: &Self::IdInfo) -> impl PinInit<Self, Error> {
+        dev_info!(
+            adev.as_ref(),
+            "Probing auxiliary driver for auxiliary device with id={}\n",
+            adev.id()
+        );
+
+        ParentDriver::connect(adev)?;
+
+        Ok(Self)
+    }
+}
+
+#[pin_data]
+struct ParentDriver {
+    private: TypeId,
+    #[pin]
+    _reg0: Devres<auxiliary::Registration>,
+    #[pin]
+    _reg1: Devres<auxiliary::Registration>,
+}
+
+kernel::pci_device_table!(
+    PCI_TABLE,
+    MODULE_PCI_TABLE,
+    <ParentDriver as pci::Driver>::IdInfo,
+    [(pci::DeviceId::from_id(pci::Vendor::REDHAT, 0x5), ())]
+);
+
+impl pci::Driver for ParentDriver {
+    type IdInfo = ();
+
+    const ID_TABLE: pci::IdTable<Self::IdInfo> = &PCI_TABLE;
+
+    fn probe(pdev: &pci::Device<Core>, _info: &Self::IdInfo) -> impl PinInit<Self, Error> {
+        try_pin_init!(Self {
+            private: TypeId::of::<Self>(),
+            _reg0 <- auxiliary::Registration::new(pdev.as_ref(), AUXILIARY_NAME, 0, MODULE_NAME),
+            _reg1 <- auxiliary::Registration::new(pdev.as_ref(), AUXILIARY_NAME, 1, MODULE_NAME),
+        })
+    }
+}
+
+impl ParentDriver {
+    fn connect(adev: &auxiliary::Device<Bound>) -> Result {
+        let dev = adev.parent();
+        let pdev: &pci::Device<Bound> = dev.try_into()?;
+        let drvdata = dev.drvdata::<Self>()?;
+
+        dev_info!(
+            dev,
+            "Connect auxiliary {} with parent: VendorID={}, DeviceID={:#x}\n",
+            adev.id(),
+            pdev.vendor_id(),
+            pdev.device_id()
+        );
+
+        dev_info!(
+            dev,
+            "We have access to the private data of {:?}.\n",
+            drvdata.private
+        );
+
+        Ok(())
+    }
+}
+
+#[pin_data]
+struct SampleModule {
+    #[pin]
+    _pci_driver: driver::Registration<pci::Adapter<ParentDriver>>,
+    #[pin]
+    _aux_driver: driver::Registration<auxiliary::Adapter<AuxiliaryDriver>>,
+}
+
+impl InPlaceModule for SampleModule {
+    fn init(module: &'static kernel::ThisModule) -> impl PinInit<Self, Error> {
+        try_pin_init!(Self {
+            _pci_driver <- driver::Registration::new(MODULE_NAME, module),
+            _aux_driver <- driver::Registration::new(MODULE_NAME, module),
+        })
+    }
+}
+
+module! {
+    type: SampleModule,
+    name: "rust_driver_auxiliary",
+    authors: ["Danilo Krummrich"],
+    description: "Rust auxiliary driver",
+    license: "GPL v2",
+}