[PATCH v4 20/27] gpu: nova-core: separate driver type from driver data

[Danilo Krummrich <dakr@kernel.org>]

Introduce NovaCoreDriver as the driver type implementing pci::Driver,
keeping NovaCore as the per-device data type. This prepares for making
NovaCore lifetime-parameterized once auxiliary::Registration requires a
lifetime for the binding scope.

Signed-off-by: Danilo Krummrich <dakr@kernel.org>
---
 drivers/gpu/nova-core/driver.rs    | 14 ++++++++------
 drivers/gpu/nova-core/nova_core.rs |  2 +-
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/nova-core/driver.rs b/drivers/gpu/nova-core/driver.rs
index 7dbec0470c26..fa898fe5c893 100644
--- a/drivers/gpu/nova-core/driver.rs
+++ b/drivers/gpu/nova-core/driver.rs
@@ -35,6 +35,8 @@ pub(crate) struct NovaCore {
     _reg: Devres<auxiliary::Registration<()>>,
 }
 
+pub(crate) struct NovaCoreDriver;
+
 const BAR0_SIZE: usize = SZ_16M;
 
 // For now we only support Ampere which can use up to 47-bit DMA addresses.
@@ -50,7 +52,7 @@ pub(crate) struct NovaCore {
 kernel::pci_device_table!(
     PCI_TABLE,
     MODULE_PCI_TABLE,
-    <NovaCore as pci::Driver>::IdInfo,
+    <NovaCoreDriver as pci::Driver>::IdInfo,
     [
         // Modern NVIDIA GPUs will show up as either VGA or 3D controllers.
         (
@@ -72,15 +74,15 @@ pub(crate) struct NovaCore {
     ]
 );
 
-impl pci::Driver for NovaCore {
+impl pci::Driver for NovaCoreDriver {
     type IdInfo = ();
-    type Data<'bound> = Self;
+    type Data<'bound> = NovaCore;
     const ID_TABLE: pci::IdTable<Self::IdInfo> = &PCI_TABLE;
 
     fn probe<'bound>(
         pdev: &'bound pci::Device<Core<'_>>,
         _info: &'bound Self::IdInfo,
-    ) -> impl PinInit<Self, Error> + 'bound {
+    ) -> impl PinInit<NovaCore, Error> + 'bound {
         pin_init::pin_init_scope(move || {
             dev_dbg!(pdev, "Probe Nova Core GPU driver.\n");
 
@@ -98,7 +100,7 @@ fn probe<'bound>(
                 GFP_KERNEL,
             )?;
 
-            Ok(try_pin_init!(Self {
+            Ok(try_pin_init!(NovaCore {
                 gpu <- Gpu::new(pdev, bar.clone(), bar.access(pdev.as_ref())?),
                 _reg: auxiliary::Registration::new(
                     pdev.as_ref(),
@@ -113,7 +115,7 @@ fn probe<'bound>(
         })
     }
 
-    fn unbind<'bound>(pdev: &'bound pci::Device<Core<'_>>, this: Pin<&Self>) {
+    fn unbind<'bound>(pdev: &'bound pci::Device<Core<'_>>, this: Pin<&NovaCore>) {
         this.gpu.unbind(pdev.as_ref());
     }
 }
diff --git a/drivers/gpu/nova-core/nova_core.rs b/drivers/gpu/nova-core/nova_core.rs
index 04a1fa6b25f8..073d87714d3a 100644
--- a/drivers/gpu/nova-core/nova_core.rs
+++ b/drivers/gpu/nova-core/nova_core.rs
@@ -47,7 +47,7 @@ struct NovaCoreModule {
     // Fields are dropped in declaration order, so `_driver` is dropped first,
     // then `_debugfs_guard` clears `DEBUGFS_ROOT`.
     #[pin]
-    _driver: Registration<pci::Adapter<driver::NovaCore>>,
+    _driver: Registration<pci::Adapter<driver::NovaCoreDriver>>,
     _debugfs_guard: DebugfsRootGuard,
 }
 
-- 
2.54.0