linux-kernel - [PATCH v2 2/3] rust: phy: add some phy_driver and genphy

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Date: Thu, 01 Feb 2024 19:06:59 +0100
From: Christina Quast <contact@...istina-quast.de>
To: Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
 Wedson Almeida Filho <wedsonaf@...il.com>, 
 Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
 Benno Lossin <benno.lossin@...ton.me>, 
 Andreas Hindborg <a.hindborg@...sung.com>, 
 Alice Ryhl <aliceryhl@...gle.com>, 
 FUJITA Tomonori <fujita.tomonori@...il.com>, 
 Trevor Gross <tmgross@...ch.edu>, Andrew Lunn <andrew@...n.ch>, 
 Heiner Kallweit <hkallweit1@...il.com>, 
 Russell King <linux@...linux.org.uk>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Heiko Stuebner <heiko@...ech.de>
Cc: rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
 netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, 
 Christina Quast <contact@...istina-quast.de>
Subject: [PATCH v2 2/3] rust: phy: add some phy_driver and genphy_
 functions

Those functions are need for the rockchip_rust.rs implementation.

Added functions:
genphy_config_aneg
config_init

Getter functions for mdix and speed.

Signed-off-by: Christina Quast <contact@...istina-quast.de>
---
 rust/kernel/net/phy.rs | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/rust/kernel/net/phy.rs b/rust/kernel/net/phy.rs
index e457b3c7cb2f..373a4d358e9f 100644
--- a/rust/kernel/net/phy.rs
+++ b/rust/kernel/net/phy.rs
@@ -95,6 +95,22 @@ pub fn phy_id(&self) -> u32 {
         unsafe { (*phydev).phy_id }
     }

+    /// Gets the current crossover of the PHY.
+    pub fn mdix(&self) -> u8 {
+        let phydev = self.0.get();
+        // SAFETY: The struct invariant ensures that we may access
+        // this field without additional synchronization.
+        unsafe { (*phydev).mdix }
+    }
+
+    /// Gets the speed of the PHY.
+    pub fn speed(&mut self) -> u32 {
+        let phydev = self.0.get();
+        // SAFETY: The struct invariant ensures that we may access
+        // this field without additional synchronization.
+        unsafe { (*phydev).speed as u32 }
+    }
+
     /// Gets the state of PHY state machine states.
     pub fn state(&self) -> DeviceState {
         let phydev = self.0.get();
@@ -300,6 +316,15 @@ pub fn genphy_read_abilities(&mut self) -> Result {
         // So it's just an FFI call.
         to_result(unsafe { bindings::genphy_read_abilities(phydev) })
     }
+
+    /// Writes BMCR
+    pub fn genphy_config_aneg(&mut self) -> Result {
+        let phydev = self.0.get();
+        // SAFETY: `phydev` is pointing to a valid object by the type invariant of `Self`.
+        // So it's just an FFI call.
+        // second param = false => autoneg not requested
+        to_result(unsafe { bindings::__genphy_config_aneg(phydev, false) })
+    }
 }

 /// Defines certain other features this PHY supports (like interrupts).
@@ -583,6 +608,12 @@ fn soft_reset(_dev: &mut Device) -> Result {
         Err(code::ENOTSUPP)
     }

+    /// Called to initialize the PHY,
+    /// including after a reset
+    fn config_init(_dev: &mut Device) -> Result {
+        Err(code::ENOTSUPP)
+    }
+
     /// Probes the hardware to determine what abilities it has.
     fn get_features(_dev: &mut Device) -> Result {
         Err(code::ENOTSUPP)

-- 
2.43.0