netdev - [PATCH net-next v1 1/4] rust: net::phy support config

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Message-Id: <20240415104701.4772-2-fujita.tomonori@gmail.com>
Date: Mon, 15 Apr 2024 19:46:58 +0900
From: FUJITA Tomonori <fujita.tomonori@...il.com>
To: netdev@...r.kernel.org
Cc: andrew@...n.ch,
	rust-for-linux@...r.kernel.org,
	tmgross@...ch.edu
Subject: [PATCH net-next v1 1/4] rust: net::phy support config_init driver callback

This patch adds phy_driver's config_init callback support for
initializing the hardware.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@...il.com>
---
 rust/kernel/net/phy.rs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/rust/kernel/net/phy.rs b/rust/kernel/net/phy.rs
index 96e09c6e8530..44b59bbf1a52 100644
--- a/rust/kernel/net/phy.rs
+++ b/rust/kernel/net/phy.rs
@@ -338,6 +338,22 @@ impl<T: Driver> Adapter<T> {
         })
     }
 
+    /// # Safety
+    ///
+    /// `phydev` must be passed by the corresponding callback in `phy_driver`.
+    unsafe extern "C" fn config_init_callback(
+        phydev: *mut bindings::phy_device,
+    ) -> core::ffi::c_int {
+        from_result(|| {
+            // SAFETY: This callback is called only in contexts
+            // where we hold `phy_device->lock`, so the accessors on
+            // `Device` are okay to call.
+            let dev = unsafe { Device::from_raw(phydev) };
+            T::config_init(dev)?;
+            Ok(0)
+        })
+    }
+
     /// # Safety
     ///
     /// `phydev` must be passed by the corresponding callback in `phy_driver`.
@@ -511,6 +527,11 @@ pub const fn create_phy_driver<T: Driver>() -> DriverVTable {
         } else {
             None
         },
+        config_init: if T::HAS_CONFIG_INIT {
+            Some(Adapter::<T>::config_init_callback)
+        } else {
+            None
+        },
         get_features: if T::HAS_GET_FEATURES {
             Some(Adapter::<T>::get_features_callback)
         } else {
@@ -583,6 +604,11 @@ fn soft_reset(_dev: &mut Device) -> Result {
         kernel::build_error(VTABLE_DEFAULT_ERROR)
     }
 
+    /// Initializes the hardware, including after a reset.
+    fn config_init(_dev: &mut Device) -> Result {
+        kernel::build_error(VTABLE_DEFAULT_ERROR)
+    }
+
     /// Probes the hardware to determine what abilities it has.
     fn get_features(_dev: &mut Device) -> Result {
         kernel::build_error(VTABLE_DEFAULT_ERROR)
-- 
2.34.1