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 3808E20F09C; Wed, 16 Jul 2025 15:04:29 +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=1752678270; cv=none; b=RAE+c1o1eegOLrz1rLRQba1HzhYmhDiPEynSn7BckMNMG/iXxuS0KJvobRaZ8icNNkMzAkHqlhejWXZOzexQQf7DzdarGeSzNh7sKmYKiELSNHjXalwRk0S7Rr01ou6DKVsEmLBxS9abrr3N1Lh3Xw2aI1KOzVSH6hjSKZl9DYY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752678270; c=relaxed/simple; bh=8YbmoICxDHq8BmA5AG+ttKnGA2bK0YMKDQUYjpfZl1I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Fva0dseTIhYMm0v6xDtm50pjYSc85aXyrXQS/mOyr+OhFcc34xWhln5qwxt+FTXlPMHUEqiBT7iZFaqI/0/r/bveL/zhFkzOggqQ/SFK9aBttfe/Y57ZERMVuSoureuDEW4wHIVxVV3yNWUxEQsl3RDd4Nbg0E/ZLPzfDPHBOBo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TuaDUPA1; 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="TuaDUPA1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6643C4CEEB; Wed, 16 Jul 2025 15:04:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1752678269; bh=8YbmoICxDHq8BmA5AG+ttKnGA2bK0YMKDQUYjpfZl1I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TuaDUPA1RMXdRBoIH8EMUk/TxGAcdmpsHj8SlaUxRHh1igaFiYJvrVW0YSAInybi7 DlAinAnB2yF3zZn4L4BtKJTYCgnEenmV8M5VQGiiEQMYNP3RctDsZGTqC92d61p6JH ie9Ubq/hAJ0XfcogZE+SoyHlAtIllk6Pn0p4pJYcYifbvr9TLWmcu1DwJhCuqTagJi rn2vVraS2y4G+JS4zN7WW7AaBo414b8waeFanCIF/iKesledQf++rjMycgOGxHsSCL VMgCunhPLo5Ptb8h+X3kB7YiPsiWOr05BWa3FGqFPnd+s2xox3yc1ge3l2VnpCs5N5 3UPnVf7Z+gX6w== From: Danilo Krummrich To: abdiel.janulgue@gmail.com, daniel.almeida@collabora.com, robin.murphy@arm.com, a.hindborg@kernel.org, ojeda@kernel.org, alex.gaynor@gmail.com, boqun.feng@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, aliceryhl@google.com, tmgross@umich.edu, bhelgaas@google.com, kwilczynski@kernel.org, gregkh@linuxfoundation.org, rafael@kernel.org Cc: rust-for-linux@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Danilo Krummrich Subject: [PATCH v2 5/5] rust: samples: dma: set DMA mask Date: Wed, 16 Jul 2025 17:02:50 +0200 Message-ID: <20250716150354.51081-6-dakr@kernel.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250716150354.51081-1-dakr@kernel.org> References: <20250716150354.51081-1-dakr@kernel.org> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Set a DMA mask for the `pci::Device` in the Rust DMA sample driver. Reviewed-by: Abdiel Janulgue Signed-off-by: Danilo Krummrich --- samples/rust/rust_dma.rs | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/samples/rust/rust_dma.rs b/samples/rust/rust_dma.rs index 9e05d5c0cdae..9422ac68c139 100644 --- a/samples/rust/rust_dma.rs +++ b/samples/rust/rust_dma.rs @@ -4,7 +4,14 @@ //! //! To make this driver probe, QEMU must be run with `-device pci-testdev`. -use kernel::{bindings, device::Core, dma::CoherentAllocation, pci, prelude::*, types::ARef}; +use kernel::{ + bindings, + device::Core, + dma::{CoherentAllocation, Device, DmaMask}, + pci, + prelude::*, + types::ARef, +}; struct DmaSampleDriver { pdev: ARef, @@ -51,6 +58,11 @@ impl pci::Driver for DmaSampleDriver { fn probe(pdev: &pci::Device, _info: &Self::IdInfo) -> Result>> { dev_info!(pdev.as_ref(), "Probe DMA test driver.\n"); + let mask = DmaMask::new(64)?; + + // SAFETY: There are no concurrent calls to DMA allocation and mapping primitives. + unsafe { pdev.dma_set_mask_and_coherent(mask)? }; + let ca: CoherentAllocation = CoherentAllocation::alloc_coherent(pdev.as_ref(), TEST_VALUES.len(), GFP_KERNEL)?; -- 2.50.0