[PATCH 03/14] rust: pci: add vtable attribute to pci::Driver trait

[Zhi Wang <zhiw@nvidia.com>]

From: Peter Colberg <pcolberg@redhat.com>

Add the #[vtable] attribute to pci::Driver trait and implementations,
to prepare a subsequent patch that adds an optional bus callback
sriov_configure() to enable or disable the SR-IOV capability.

Suggested-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Peter Colberg <pcolberg@redhat.com>
Signed-off-by: Zhi Wang <zhiw@nvidia.com>
---
 drivers/gpu/nova-core/driver.rs       | 1 +
 rust/kernel/pci.rs                    | 2 ++
 samples/rust/rust_dma.rs              | 1 +
 samples/rust/rust_driver_auxiliary.rs | 1 +
 samples/rust/rust_driver_pci.rs       | 1 +
 5 files changed, 6 insertions(+)

diff --git a/drivers/gpu/nova-core/driver.rs b/drivers/gpu/nova-core/driver.rs
index 1f6fe2d97cab..a5b9a50cbaca 100644
--- a/drivers/gpu/nova-core/driver.rs
+++ b/drivers/gpu/nova-core/driver.rs
@@ -94,6 +94,7 @@ pub(crate) fn bar1_resource_index(pdev: &pci::Device<Bound>) -> Result<u32> {
     ]
 );
 
+#[vtable]
 impl pci::Driver for NovaCoreDriver {
     type IdInfo = ();
     type Data<'bound> = NovaCore<'bound>;
diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs
index 63fd8167e4ac..24b682d4d6da 100644
--- a/rust/kernel/pci.rs
+++ b/rust/kernel/pci.rs
@@ -282,6 +282,7 @@ macro_rules! pci_device_table {
 ///     ]
 /// );
 ///
+/// #[vtable]
 /// impl pci::Driver for MyDriver {
 ///     type IdInfo = ();
 ///     type Data<'bound> = Self;
@@ -297,6 +298,7 @@ macro_rules! pci_device_table {
 ///```
 /// Drivers must implement this trait in order to get a PCI driver registered. Please refer to the
 /// `Adapter` documentation for an example.
+#[vtable]
 pub trait Driver {
     /// The type holding information about each device id supported by the driver.
     // TODO: Use `associated_type_defaults` once stabilized:
diff --git a/samples/rust/rust_dma.rs b/samples/rust/rust_dma.rs
index ffb693544673..804d55a63005 100644
--- a/samples/rust/rust_dma.rs
+++ b/samples/rust/rust_dma.rs
@@ -69,6 +69,7 @@ unsafe impl kernel::transmute::FromBytes for MyStruct {}
     [(pci::DeviceId::from_id(pci::Vendor::REDHAT, 0x5), ())]
 );
 
+#[vtable]
 impl pci::Driver for DmaSampleDriver {
     type IdInfo = ();
     type Data<'bound> = DmaSampleData<'bound>;
diff --git a/samples/rust/rust_driver_auxiliary.rs b/samples/rust/rust_driver_auxiliary.rs
index 0bee16faecc6..6cff9bf8c80c 100644
--- a/samples/rust/rust_driver_auxiliary.rs
+++ b/samples/rust/rust_driver_auxiliary.rs
@@ -90,6 +90,7 @@ struct ParentData<'bound> {
     [(pci::DeviceId::from_id(pci::Vendor::REDHAT, 0x5), ())]
 );
 
+#[vtable]
 impl pci::Driver for ParentDriver {
     type IdInfo = ();
     type Data<'bound> = ParentData<'bound>;
diff --git a/samples/rust/rust_driver_pci.rs b/samples/rust/rust_driver_pci.rs
index 13b035a95756..50c8709739c6 100644
--- a/samples/rust/rust_driver_pci.rs
+++ b/samples/rust/rust_driver_pci.rs
@@ -139,6 +139,7 @@ fn config_space(pdev: &pci::Device<Bound>) {
     }
 }
 
+#[vtable]
 impl pci::Driver for SampleDriver {
     type IdInfo = TestIndex;
     type Data<'bound> = SampleDriverData<'bound>;