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From: Eliot Courtney <ecourtney@nvidia.com>
To: "Danilo Krummrich" <dakr@kernel.org>,
	"Alexandre Courbot" <acourbot@nvidia.com>,
	"Alice Ryhl" <aliceryhl@google.com>,
	"David Airlie" <airlied@gmail.com>,
	"Simona Vetter" <simona@ffwll.ch>,
	"Abdiel Janulgue" <abdiel.janulgue@gmail.com>,
	"Daniel Almeida" <daniel.almeida@collabora.com>,
	"Robin Murphy" <robin.murphy@arm.com>,
	"Andreas Hindborg" <a.hindborg@kernel.org>,
	"Miguel Ojeda" <ojeda@kernel.org>,
	"Boqun Feng" <boqun.feng@gmail.com>,
	"Gary Guo" <gary@garyguo.net>,
	"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
	"Benno Lossin" <lossin@kernel.org>,
	"Trevor Gross" <tmgross@umich.edu>
Cc: nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	 linux-kernel@vger.kernel.org, driver-core@lists.linux.dev,
	 rust-for-linux@vger.kernel.org,
	Eliot Courtney <ecourtney@nvidia.com>
Subject: [PATCH 8/9] rust: dma: add CoherentObject for single element allocations
Date: Fri, 30 Jan 2026 17:34:11 +0900	[thread overview]
Message-ID: <20260130-coherent-array-v1-8-bcd672dacc70@nvidia.com> (raw)
In-Reply-To: <20260130-coherent-array-v1-0-bcd672dacc70@nvidia.com>

Add a type alias for convenience and readability for single element
allocations.

Signed-off-by: Eliot Courtney <ecourtney@nvidia.com>
---
 rust/kernel/dma.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rust/kernel/dma.rs b/rust/kernel/dma.rs
index 25da678c863b..120fc01e57a3 100644
--- a/rust/kernel/dma.rs
+++ b/rust/kernel/dma.rs
@@ -423,6 +423,9 @@ pub struct CoherentAllocation<T: AsBytes + FromBytes, Size: AllocationSize = Run
 /// A coherent DMA allocation for an array of `N` elements.
 pub type CoherentArray<T, const N: usize> = CoherentAllocation<T, StaticSize<N>>;
 
+/// A coherent DMA allocation for a single object.
+pub type CoherentObject<T> = CoherentAllocation<T, StaticSize<1>>;
+
 impl<T: AsBytes + FromBytes, Size: AllocationSize> CoherentAllocation<T, Size> {
     /// Returns the number of elements `T` in this allocation.
     ///

-- 
2.52.0


  parent reply	other threads:[~2026-01-30  8:36 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-30  8:34 [PATCH 0/9] rust: dma: add CoherentArray for compile-time sized allocations Eliot Courtney
2026-01-30  8:34 ` [PATCH 1/9] rust: dma: rename CoherentAllocation fallible methods Eliot Courtney
2026-01-30  8:34 ` [PATCH 2/9] rust: dma: parameterize CoherentAllocation with AllocationSize Eliot Courtney
2026-01-30  8:34 ` [PATCH 3/9] rust: dma: add CoherentArray for compile-time sized allocations Eliot Courtney
2026-01-30  8:34 ` [PATCH 4/9] rust: dma: simplify try_dma_read! and try_dma_write! Eliot Courtney
2026-01-30  8:34 ` [PATCH 5/9] rust: dma: rename try_item_from_index to try_ptr_at Eliot Courtney
2026-01-30  8:34 ` [PATCH 6/9] rust: dma: add dma_read! and dma_write! macros Eliot Courtney
2026-01-30 10:26   ` Alice Ryhl
2026-01-30  8:34 ` [PATCH 7/9] rust: dma: implement decay from CoherentArray to CoherentSlice Eliot Courtney
2026-01-30  8:34 ` Eliot Courtney [this message]
2026-01-30  8:34 ` [PATCH 9/9] gpu: nova-core: migrate to CoherentArray and CoherentObject Eliot Courtney
2026-01-31 12:27 ` [PATCH 0/9] rust: dma: add CoherentArray for compile-time sized allocations Danilo Krummrich
2026-01-31 13:16   ` Alexandre Courbot
2026-01-31 13:56     ` Danilo Krummrich
2026-02-02 14:22 ` Gary Guo

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