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 X-Spam-Level: X-Spam-Status: No, score=-5.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0EA48C43444 for ; Thu, 17 Jan 2019 17:47:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D0DC020652 for ; Thu, 17 Jan 2019 17:47:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="n7Kh9un+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727409AbfAQRrp (ORCPT ); Thu, 17 Jan 2019 12:47:45 -0500 Received: from mail-vs1-f68.google.com ([209.85.217.68]:42982 "EHLO mail-vs1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727256AbfAQRro (ORCPT ); Thu, 17 Jan 2019 12:47:44 -0500 Received: by mail-vs1-f68.google.com with SMTP id b74so6735308vsd.9 for ; Thu, 17 Jan 2019 09:47:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=8bfolpDOyZxp4KlTvybxx7l473gLDDQ4AeEXm8Q3XDk=; b=n7Kh9un+bQ8rX2NmqPcrItWOr/mvGfQe1TbvvIMCShJoUp4SsR3OXY+v3GuxJeyjY7 t7vwcppXv2RLif1yVd9+XTjT5enRINGml9hHY1CogLXdGaRFff9xXCQR6qzhJ2r3ugWz m1ZxKpIE1NvsYGZ5ka+M1ZuhODgv7O7iNJgfk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=8bfolpDOyZxp4KlTvybxx7l473gLDDQ4AeEXm8Q3XDk=; b=INSTxjEzt5VNUo1Sm1t49GV8CQU1mBH5RP9lJSVoK2hAio8x0pkn2/NzF7w4AnTTgY Hjqu0XHJ/tJ1hAz0qp0IEyIwXpXJ5LUmEob5fb1hiP3Q4/LnHjqUcsImpzEeAasexIXj DtvKYW3wKz8hvjUmN7RMz5YbKl0S/6Ek4/obDO3auyZqBynrljnW4NTKwGzZDMzBdrOe E7l9QTw2KNGC5Zx0PGeGBiAR9XwKdiHmYp4L+POlMxgBgz7o0cqF3k3nbG85cOYN54M9 9BRkKVnCJcGPYHHmAN3RgJ1TcVMd3xjg5iIVmxvmzd/a/KF1WCJjhLyFkkd4nmgkwD86 JIAw== X-Gm-Message-State: AJcUukf6qv9xZv1Qi2rPDmyjEr4c0bi0U60O9w4C/pvEfDCRzo+vB/gn bdV5hxMgtH6r1jb0h7x5HGAceWO7IAc= X-Google-Smtp-Source: ALg8bN73YyFRbR5GNwJ2WAmhvlNLWk0MqxgbyWkMCcooKdF2mliky48jn79XA6hMRGIPAwb9js7c3A== X-Received: by 2002:a67:7446:: with SMTP id p67mr6273410vsc.2.1547747263042; Thu, 17 Jan 2019 09:47:43 -0800 (PST) Received: from mail-vk1-f178.google.com (mail-vk1-f178.google.com. [209.85.221.178]) by smtp.gmail.com with ESMTPSA id l197sm72902650vke.18.2019.01.17.09.47.41 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 17 Jan 2019 09:47:41 -0800 (PST) Received: by mail-vk1-f178.google.com with SMTP id b18so2470392vke.2 for ; Thu, 17 Jan 2019 09:47:41 -0800 (PST) X-Received: by 2002:a1f:1e09:: with SMTP id e9mr6077331vke.18.1547747261016; Thu, 17 Jan 2019 09:47:41 -0800 (PST) MIME-Version: 1.0 References: <20190117042940.25487-1-bjorn.andersson@linaro.org> <20190117042940.25487-3-bjorn.andersson@linaro.org> In-Reply-To: <20190117042940.25487-3-bjorn.andersson@linaro.org> From: Doug Anderson Date: Thu, 17 Jan 2019 09:47:28 -0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v4 2/2] arm64: dts: qcom: sdm845: Extend ranges and describe DMA space To: Bjorn Andersson Cc: Andy Gross , David Brown , Rob Herring , Mark Rutland , Stephen Boyd , linux-arm-msm , devicetree@vger.kernel.org, LKML Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Wed, Jan 16, 2019 at 8:30 PM Bjorn Andersson wrote: > > For devices attached to an IOMMU, translation between IOVA and physical > addresses is no longer 1:1 and dma-ranges should be specified to > describe the available IOVA address space. > > On SDM845 the busses are implemented with 36 address bits, so dma-ranges > must be defined to reduce the size of the IOVA address space from the 48 > bits supported by the SMMU. Without this DMA allocations may end up with > IOVAs outside the valid range, that gets truncated by the bus between > the device and its translation unit. > > Also extend ranges to describe the available address space. > > Signed-off-by: Bjorn Andersson > --- > > Changes since v3: > - Split this out from patch 1. > - Rewrote commit message from scratch > > arch/arm64/boot/dts/qcom/sdm845.dtsi | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) Reviewed-by: Douglas Anderson Tested-by: Douglas Anderson