rust: pci: use pci::Vendor instead of bindings::PCI_VENDOR_ID_*

Change Device::vendor_id() to return a Vendor type, and change
DeviceId::from_id() to accept a Vendor type.

Use the new pci::Vendor in the various Rust for Linux callers who were
previously using bindings::PCI_VENDOR_ID_*.

Doing so also allows removing "use kernel::bindings" entirely from most
of the affected files here.

Also, mark vendor_id() as inline.

Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Elle Rhumsaa <elle@weathered-steel.dev>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Link: https://lore.kernel.org/r/20250829223632.144030-6-jhubbard@nvidia.com
[ Replace "as a validated vendor" with "as [`Vendor`]". - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

5 files changed, 37 insertions, 26 deletions

diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs
index 5d95081346e6..391baf95929a 100644
--- a/rust/kernel/pci.rs
+++ b/rust/kernel/pci.rs
@@ -133,10 +133,10 @@ impl DeviceId {
 
     /// Equivalent to C's `PCI_DEVICE` macro.
     ///
-    /// Create a new `pci::DeviceId` from a vendor and device ID number.
-    pub const fn from_id(vendor: u32, device: u32) -> Self {
+    /// Create a new `pci::DeviceId` from a vendor and device ID.
+    pub const fn from_id(vendor: Vendor, device: u32) -> Self {
         Self(bindings::pci_device_id {
-            vendor,
+            vendor: vendor.as_raw() as u32,
             device,
             subvendor: DeviceId::PCI_ANY_ID,
             subdevice: DeviceId::PCI_ANY_ID,
@@ -234,7 +234,7 @@ macro_rules! pci_device_table {
 ///     <MyDriver as pci::Driver>::IdInfo,
 ///     [
 ///         (
-///             pci::DeviceId::from_id(bindings::PCI_VENDOR_ID_REDHAT, bindings::PCI_ANY_ID as u32),
+///             pci::DeviceId::from_id(pci::Vendor::REDHAT, bindings::PCI_ANY_ID as u32),
 ///             (),
 ///         )
 ///     ]
@@ -415,12 +415,29 @@ impl<Ctx: device::DeviceContext> Device<Ctx> {
 }
 
 impl Device {
-    /// Returns the PCI vendor ID.
+    /// Returns the PCI vendor ID as [`Vendor`].
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use kernel::{device::Core, pci::{self, Vendor}, prelude::*};
+    /// fn log_device_info(pdev: &pci::Device<Core>) -> Result {
+    ///     // Get an instance of `Vendor`.
+    ///     let vendor = pdev.vendor_id();
+    ///     dev_info!(
+    ///         pdev.as_ref(),
+    ///         "Device: Vendor={}, Device=0x{:x}\n",
+    ///         vendor,
+    ///         pdev.device_id()
+    ///     );
+    ///     Ok(())
+    /// }
+    /// ```
     #[inline]
-    pub fn vendor_id(&self) -> u16 {
-        // SAFETY: By its type invariant `self.as_raw` is always a valid pointer to a
-        // `struct pci_dev`.
-        unsafe { (*self.as_raw()).vendor }
+    pub fn vendor_id(&self) -> Vendor {
+        // SAFETY: `self.as_raw` is a valid pointer to a `struct pci_dev`.
+        let vendor_id = unsafe { (*self.as_raw()).vendor };
+        Vendor::from_raw(vendor_id)
     }
 
     /// Returns the PCI device ID.
diff --git a/rust/kernel/pci/id.rs b/rust/kernel/pci/id.rs
index f56a024f80aa..8ee1dc5c3057 100644
--- a/rust/kernel/pci/id.rs
+++ b/rust/kernel/pci/id.rs
@@ -136,7 +136,6 @@ macro_rules! define_all_pci_vendors {
 /// Once constructed, a `Vendor` contains a valid PCI Vendor ID.
 impl Vendor {
     /// Create a Vendor from a raw 16-bit vendor ID.
-    #[expect(dead_code)]
     #[inline]
     pub(super) fn from_raw(vendor_id: u16) -> Self {
         Self(vendor_id)
diff --git a/samples/rust/rust_dma.rs b/samples/rust/rust_dma.rs
index c5e7cce68654..f3385c4a7e5b 100644
--- a/samples/rust/rust_dma.rs
+++ b/samples/rust/rust_dma.rs
@@ -5,7 +5,6 @@
 //! To make this driver probe, QEMU must be run with `-device pci-testdev`.
 
 use kernel::{
-    bindings,
     device::Core,
     dma::{CoherentAllocation, Device, DmaMask},
     pci,
@@ -45,10 +44,7 @@ kernel::pci_device_table!(
     PCI_TABLE,
     MODULE_PCI_TABLE,
     <DmaSampleDriver as pci::Driver>::IdInfo,
-    [(
-        pci::DeviceId::from_id(bindings::PCI_VENDOR_ID_REDHAT, 0x5),
-        ()
-    )]
+    [(pci::DeviceId::from_id(pci::Vendor::REDHAT, 0x5), ())]
 );
 
 impl pci::Driver for DmaSampleDriver {
diff --git a/samples/rust/rust_driver_auxiliary.rs b/samples/rust/rust_driver_auxiliary.rs
index f2a820683fc3..55ece336ee45 100644
--- a/samples/rust/rust_driver_auxiliary.rs
+++ b/samples/rust/rust_driver_auxiliary.rs
@@ -5,7 +5,7 @@
 //! To make this driver probe, QEMU must be run with `-device pci-testdev`.
 
 use kernel::{
-    auxiliary, bindings, c_str, device::Core, driver, error::Error, pci, prelude::*, InPlaceModule,
+    auxiliary, c_str, device::Core, driver, error::Error, pci, prelude::*, InPlaceModule,
 };
 
 use pin_init::PinInit;
@@ -50,10 +50,7 @@ kernel::pci_device_table!(
     PCI_TABLE,
     MODULE_PCI_TABLE,
     <ParentDriver as pci::Driver>::IdInfo,
-    [(
-        pci::DeviceId::from_id(bindings::PCI_VENDOR_ID_REDHAT, 0x5),
-        ()
-    )]
+    [(pci::DeviceId::from_id(pci::Vendor::REDHAT, 0x5), ())]
 );
 
 impl pci::Driver for ParentDriver {
@@ -81,11 +78,12 @@ impl ParentDriver {
         let parent = adev.parent().ok_or(EINVAL)?;
         let pdev: &pci::Device = parent.try_into()?;
 
+        let vendor = pdev.vendor_id();
         dev_info!(
             adev.as_ref(),
-            "Connect auxiliary {} with parent: VendorID={:#x}, DeviceID={:#x}\n",
+            "Connect auxiliary {} with parent: VendorID={}, DeviceID={:#x}\n",
             adev.id(),
-            pdev.vendor_id(),
+            vendor,
             pdev.device_id()
         );
 
diff --git a/samples/rust/rust_driver_pci.rs b/samples/rust/rust_driver_pci.rs
index 0798019014cd..97baec8df9bc 100644
--- a/samples/rust/rust_driver_pci.rs
+++ b/samples/rust/rust_driver_pci.rs
@@ -4,7 +4,7 @@
 //!
 //! To make this driver probe, QEMU must be run with `-device pci-testdev`.
 
-use kernel::{bindings, c_str, device::Core, devres::Devres, pci, prelude::*, sync::aref::ARef};
+use kernel::{c_str, device::Core, devres::Devres, pci, prelude::*, sync::aref::ARef};
 
 struct Regs;
 
@@ -38,7 +38,7 @@ kernel::pci_device_table!(
     MODULE_PCI_TABLE,
     <SampleDriver as pci::Driver>::IdInfo,
     [(
-        pci::DeviceId::from_id(bindings::PCI_VENDOR_ID_REDHAT, 0x5),
+        pci::DeviceId::from_id(pci::Vendor::REDHAT, 0x5),
         TestIndex::NO_EVENTFD
     )]
 );
@@ -66,10 +66,11 @@ impl pci::Driver for SampleDriver {
     const ID_TABLE: pci::IdTable<Self::IdInfo> = &PCI_TABLE;
 
     fn probe(pdev: &pci::Device<Core>, info: &Self::IdInfo) -> Result<Pin<KBox<Self>>> {
+        let vendor = pdev.vendor_id();
         dev_dbg!(
             pdev.as_ref(),
-            "Probe Rust PCI driver sample (PCI ID: 0x{:x}, 0x{:x}).\n",
-            pdev.vendor_id(),
+            "Probe Rust PCI driver sample (PCI ID: {}, 0x{:x}).\n",
+            vendor,
             pdev.device_id()
         );