linux-kernel - [PATCH 3/5] rust: pci: implement the `dma::Device` trait

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Message-ID: <20250710194556.62605-4-dakr@kernel.org>
Date: Thu, 10 Jul 2025 21:45:45 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: abdiel.janulgue@...il.com,
	daniel.almeida@...labora.com,
	robin.murphy@....com,
	a.hindborg@...nel.org,
	ojeda@...nel.org,
	alex.gaynor@...il.com,
	boqun.feng@...il.com,
	gary@...yguo.net,
	bjorn3_gh@...tonmail.com,
	lossin@...nel.org,
	aliceryhl@...gle.com,
	tmgross@...ch.edu,
	bhelgaas@...gle.com,
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	gregkh@...uxfoundation.org,
	rafael@...nel.org
Cc: rust-for-linux@...r.kernel.org,
	linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Danilo Krummrich <dakr@...nel.org>
Subject: [PATCH 3/5] rust: pci: implement the `dma::Device` trait

The PCI bus is potentially capable of performing DMA, hence implement
the `dma:Device` trait for `pci::Device`.

Signed-off-by: Danilo Krummrich <dakr@...nel.org>
---
 rust/kernel/pci.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs
index 8435f8132e38..c0aef0e1faac 100644
--- a/rust/kernel/pci.rs
+++ b/rust/kernel/pci.rs
@@ -434,6 +434,8 @@ pub fn set_master(&self) {
 kernel::impl_device_context_deref!(unsafe { Device });
 kernel::impl_device_context_into_aref!(Device);
 
+impl crate::dma::Device for Device<device::Core> {}
+
 // SAFETY: Instances of `Device` are always reference-counted.
 unsafe impl crate::types::AlwaysRefCounted for Device {
     fn inc_ref(&self) {
-- 
2.50.0