From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 427BE277CAF; Mon, 25 Aug 2025 13:26:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756128366; cv=none; b=rdMpHcG5AbEtJAVmHEgfiD8QozRD/hEScm8EqRft+JDQOmH7yO7QBMJVCzuYgvfNRPg9KCf85pnC0Yb8LRlC9fdftZzsNXQK31MtIGFWfpscmkEC0s8SepfUqNjHgufBc3JJO4Cf8SgQgA/zf3AMGMYz6HjkF/Bll3KIdJMeAYs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756128366; c=relaxed/simple; bh=SJh5t8S3nGrnslvyfeBojfqqKV9PCASWSn3mgBhpZZY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qCC3AqtM4fssnnp2VymJZtn9kWm3R7YoGsdIgOSs1c0QijaAftMEzaY479o/62Ev8rlfOEomQpDnES9/jZ/BcE7264IVT+04M2tLNlSFoXO0e34xaGVMsxU9IDfjtTVChl+/SuuBX/Ky04AK8wZjog3HEAtYVUrweOQyF1cQPOw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fZyi7xes; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="fZyi7xes" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5AFB0C113D0; Mon, 25 Aug 2025 13:26:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756128365; bh=SJh5t8S3nGrnslvyfeBojfqqKV9PCASWSn3mgBhpZZY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fZyi7xes+Bcn7ilguHlnSH6ReNnQ4aLB6OVj7qoUxc8XTAx/GH5sWAJozC4+U/SoT 2fQJYdhbQYnxVcIqZE0XRGZEzzuPA5z4ukT+LgEJV93eajJeLJIk6WJa0tnPMs0ARo 94d6wET5Sh3C21+SeUrTwUcc2N9PjM2HzGUQqfGhnK+gOcmwCC1QB22pQoPynbJItt NHvQvsYyHVagPHROFBbNZa27gVEam4IAjIfHZ00vn2uH5+RWfV7NvgeavRLmtOanls M7v1T0awdrSQzJZ98F3SK34QYpOcBcxt9fbROFscILn72PaQSqLtO0I4rLT/yyNwdC nB3FZphU1WsEw== From: Danilo Krummrich To: akpm@linux-foundation.org, ojeda@kernel.org, alex.gaynor@gmail.com, boqun.feng@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, aliceryhl@google.com, tmgross@umich.edu, abdiel.janulgue@gmail.com, acourbot@nvidia.com, jgg@ziepe.ca, lyude@redhat.com, robin.murphy@arm.com, daniel.almeida@collabora.com Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Danilo Krummrich Subject: [PATCH v3 4/5] samples: rust: dma: add sample code for SGTable Date: Mon, 25 Aug 2025 15:24:43 +0200 Message-ID: <20250825132539.122412-5-dakr@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250825132539.122412-1-dakr@kernel.org> References: <20250825132539.122412-1-dakr@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add sample code for allocating and mapping a scatter-gather table (`SGTable`). Co-developed-by: Abdiel Janulgue Signed-off-by: Abdiel Janulgue Signed-off-by: Danilo Krummrich --- samples/rust/rust_dma.rs | 35 ++++++++++++++++++++++++++--------- 1 file changed, 26 insertions(+), 9 deletions(-) diff --git a/samples/rust/rust_dma.rs b/samples/rust/rust_dma.rs index c5e7cce68654..04007e29fd85 100644 --- a/samples/rust/rust_dma.rs +++ b/samples/rust/rust_dma.rs @@ -7,15 +7,19 @@ use kernel::{ bindings, device::Core, - dma::{CoherentAllocation, Device, DmaMask}, - pci, + dma::{CoherentAllocation, DataDirection, Device, DmaMask}, + page, pci, prelude::*, + scatterlist::{Owned, SGTable}, types::ARef, }; +#[pin_data(PinnedDrop)] struct DmaSampleDriver { pdev: ARef, ca: CoherentAllocation, + #[pin] + sgt: SGTable>>, } const TEST_VALUES: [(u32, u32); 5] = [ @@ -70,21 +74,30 @@ fn probe(pdev: &pci::Device, _info: &Self::IdInfo) -> Result) { + let dev = self.pdev.as_ref(); + + dev_info!(dev, "Unload DMA test driver.\n"); for (i, value) in TEST_VALUES.into_iter().enumerate() { let val0 = kernel::dma_read!(self.ca[i].h); @@ -99,6 +112,10 @@ fn drop(&mut self) { assert_eq!(val1, value.1); } } + + for (i, entry) in self.sgt.iter().enumerate() { + dev_info!(dev, "Entry[{}]: DMA address: {:#x}", i, entry.dma_address()); + } } } -- 2.51.0