From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2E0CACA5FE5 for ; Fri, 2 Oct 2026 20:20:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Date:Message-Id:From:Subject:Content-Transfer-Encoding:MIME-Version: Content-Type:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=IE4LsdhNU5SfiDmJkZ9zOXEwMWjWebrgy9SOZRKi4+U=; b=MBS1cuCouJeLgEFIOFC7uWcg3j B6nWT6TqGwGc/XNyZG59K+psTy3x7kykdzqxK30gfoIFp/cIi9WH6xxve2S4cdSbsBgSLZE2krcIO bLQ7j6M0fhbMhQK2N6vvfUcNK80lpshZtsLIGOkY80VTmPEAk0e7E7d196T5CrkgtpzyH5Gp+LvdF /dYCyb0yxVKgw4HKPXOxRBijIkcX1HSCjdc64Qpui+93vmvRJP+04KrSEe8/Uyput4OEJ6m9UbTHP cVlDcXK6qjq6Uv2n0FgVVMX4lWW48Hkgb38cAorLD4pFr23kSmLQhcG9RIRWz6NHDGkGkLlLs2LmK YgOXK6cw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCjjp-0000000CTKB-3y1j; Fri, 02 Oct 2026 20:20:13 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCjjo-0000000CTJe-19wy for linux-arm-kernel@lists.infradead.org; Fri, 02 Oct 2026 20:20:12 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id A40C04372F; Fri, 2 Oct 2026 20:20:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 81C361F000FF; Fri, 2 Oct 2026 20:20:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790972411; bh=IE4LsdhNU5SfiDmJkZ9zOXEwMWjWebrgy9SOZRKi4+U=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=PDu9VcR41G9L0rhokPRNyVmGcmPd0vzXeiJCulTtzuiGUx2cc3sO8Y+Nr4zy9Rn+w ShmTvCulR8dFx0vsqLCFquaONxm0OxYGGSdrwpzR007qoqEUrGe70PlI0eeL+F2LK5 X2QqW+n7TgDLWxdKs2zieGKAztRUZEGftBVthjf/BML+zl13wPctKnkr1QvXT0jKhG 98Q8WRic6c/q6fonVa8n2t30Uq04dy36RXnU3E+Vy7Rdttp4juWVdg15crSZLB3z2Z ImBKD3z42cXPY8kytws8H4iP4jCWGKgUmI1+8+YnU+ATbKiu8k9T0QJcbEOV7Kz3So udcb+OZruFtqA== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 7747F3811A72; Fri, 2 Oct 2026 20:20:11 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net-next v9 00/15] net: lan966x: add support for PCIe FDMA From: patchwork-bot+netdevbpf@kernel.org Message-Id: <179097241009.3571263.7855609924848232097.git-patchwork-notify@kernel.org> Date: Fri, 02 Oct 2026 20:20:10 +0000 References: <20260928-lan966x-pci-fdma-v9-0-a17caf60f89a@microchip.com> In-Reply-To: <20260928-lan966x-pci-fdma-v9-0-a17caf60f89a@microchip.com> To: Daniel Machon Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horatiu.vultur@microchip.com, steen.hegelund@microchip.com, UNGLinuxDriver@microchip.com, ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, sdf@fomichev.me, herve.codina@bootlin.com, arnd@arndb.de, gregkh@linuxfoundation.org, mohsin.bashr@gmail.com, horms@kernel.org, richardcochran@gmail.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello: This series was applied to netdev/net-next.git (main) by Jakub Kicinski : On Mon, 28 Sep 2026 21:32:48 +0200 you wrote: > When lan966x operates as a PCIe endpoint, the driver currently uses > register-based I/O for frame injection and extraction. This approach is > functional but slow, topping out at around 33 Mbps on an Intel x86 host > with a lan966x PCIe card. > > This series adds FDMA (Frame DMA) support for the PCIe path. When > operating as a PCIe endpoint, the internal FDMA engine on lan966x cannot > directly access host memory, so DMA buffers are allocated as contiguous > coherent memory and mapped through the PCIe Address Translation Unit > (ATU). The ATU provides outbound windows that translate internal FDMA > addresses to PCIe bus addresses, allowing the FDMA engine to read and > write host memory. Because the ATU requires contiguous address regions, > page_pool and normal per-page DMA mappings cannot be used. Instead, > frames are transferred using memcpy between the ATU-mapped buffers and > the network stack. With this, throughput increases from ~33 Mbps to > ~620 Mbps for default MTU. > > [...] Here is the summary with links: - [net-next,v9,01/15] MAINTAINERS: add FDMA library to Sparx5 SoC entry https://git.kernel.org/netdev/net-next/c/91ad754f3c14 - [net-next,v9,02/15] net: microchip: fdma: rename contiguous dataptr helpers https://git.kernel.org/netdev/net-next/c/27470b22eca3 - [net-next,v9,03/15] net: microchip: fdma: add PCIe ATU support https://git.kernel.org/netdev/net-next/c/3318a794bb15 - [net-next,v9,04/15] net: microchip: fdma: use little-endian types for descriptor fields https://git.kernel.org/netdev/net-next/c/9786c387b299 - [net-next,v9,05/15] net: lan966x: add FDMA LLP register write helper https://git.kernel.org/netdev/net-next/c/2e52284420bd - [net-next,v9,06/15] net: lan966x: export FDMA helpers for reuse https://git.kernel.org/netdev/net-next/c/eac4b8882a03 - [net-next,v9,07/15] net: lan966x: use a dedicated device for DMA operations https://git.kernel.org/netdev/net-next/c/f83ac2d94a2a - [net-next,v9,08/15] net: lan966x: add FDMA ops dispatch for PCIe support https://git.kernel.org/netdev/net-next/c/5a97c2c00b8e - [net-next,v9,09/15] net: lan966x: clear FDMA interrupt stickies after switch reset https://git.kernel.org/netdev/net-next/c/58e73ef6a1e5 - [net-next,v9,10/15] net: lan966x: add shutdown callback to stop the FDMA on reboot https://git.kernel.org/netdev/net-next/c/ab6268b958f0 - [net-next,v9,11/15] net: lan966x: add PCIe FDMA support https://git.kernel.org/netdev/net-next/c/e013b82ed3b2 - [net-next,v9,12/15] net: lan966x: add PCIe FDMA MTU change support https://git.kernel.org/netdev/net-next/c/1709aa382db7 - [net-next,v9,13/15] net: lan966x: add PCIe FDMA XDP support https://git.kernel.org/netdev/net-next/c/fbb46fde6965 - [net-next,v9,14/15] misc: lan966x-pci: dts: extend cpu reg to cover PCIE DBI space https://git.kernel.org/netdev/net-next/c/100eead96ed6 - [net-next,v9,15/15] misc: lan966x-pci: dts: add fdma interrupt to overlay https://git.kernel.org/netdev/net-next/c/14b9ac2f189d You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html