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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F480C433EF for ; Tue, 26 Apr 2022 00:56:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230240AbiDZA7e (ORCPT ); Mon, 25 Apr 2022 20:59:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40722 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230338AbiDZA7d (ORCPT ); Mon, 25 Apr 2022 20:59:33 -0400 Received: from mail-oa1-f49.google.com (mail-oa1-f49.google.com [209.85.160.49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67BFF2A27E; Mon, 25 Apr 2022 17:56:27 -0700 (PDT) Received: by mail-oa1-f49.google.com with SMTP id 586e51a60fabf-e67799d278so14095016fac.11; Mon, 25 Apr 2022 17:56:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=U/mTnYUQ6pZqCz9Eu3IYpCeJl6Jh6nhN/yx/cgzIAyc=; b=MANmK4hVLj0CnFuVC+B/8diz6ZvufpLozHdHuXKi4zshBMOlgImoF556yce28hNj4J x1Gwf87tT9U8xHkG8g9GY+eQAUSW79VNFAJBP/kNnBhdfpejYD3adL6qGM0mJ+UT/wEW 6hoz5Ej/lu6Vscvo531/42/Z9dDcWi5CsgDZnX870heWiwu7C5aA0KAaUxBVHyFsuO9c /h5c5S0eiov8JzhljY/pvEwkYZMCYWTjj/nHXX7ghbHCsiQdDYiGs/HyBozctEliCLv2 dJ60rUTDYeSrCWwzQj3KZUXp+hwdKvTdCZ45LADjpo74Ci3CIZAq4B4T8K4UeTYXZcgQ 27HA== X-Gm-Message-State: AOAM530oMDk25lwzpetdwZJuVV6Mgoy0eX/3NAsJ3FTeaog3Eg4rCbK1 2bU3FeXxwZMrot9nCtAUQA== X-Google-Smtp-Source: ABdhPJxyx3J68XofDMvRr2IMaFZEVqAi9bkYtA1l1FETzILj3JsvgXUd1OQnFJY5HJlTknU0eJHU+w== X-Received: by 2002:a05:6870:15cf:b0:e2:6c7a:69fe with SMTP id k15-20020a05687015cf00b000e26c7a69femr8088818oad.257.1650934586697; Mon, 25 Apr 2022 17:56:26 -0700 (PDT) Received: from robh.at.kernel.org (66-90-144-107.dyn.grandenetworks.net. [66.90.144.107]) by smtp.gmail.com with ESMTPSA id g8-20020a056830160800b0060548e5f69csm4344925otr.2.2022.04.25.17.56.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Apr 2022 17:56:26 -0700 (PDT) Received: (nullmailer pid 659909 invoked by uid 1000); Tue, 26 Apr 2022 00:56:25 -0000 Date: Mon, 25 Apr 2022 19:56:25 -0500 From: Rob Herring To: Sven Peter Cc: linux-arm-kernel@lists.infradead.org, linux-nvme@lists.infradead.org, Christoph Hellwig , Krzysztof Kozlowski , Alyssa Rosenzweig , Rob Herring , Marc Zyngier , Hector Martin , Sagi Grimberg , Jens Axboe , Keith Busch , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Arnd Bergmann Subject: Re: [PATCH v2 1/6] dt-bindings: iommu: Add Apple SART DMA address filter Message-ID: References: <20220415142055.30873-1-sven@svenpeter.dev> <20220415142055.30873-2-sven@svenpeter.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220415142055.30873-2-sven@svenpeter.dev> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Fri, 15 Apr 2022 16:20:50 +0200, Sven Peter wrote: > Apple SoCs such as the M1 come with a simple DMA address filter called > SART. Unlike a real IOMMU no pagetables can be configured but instead > DMA transactions can be allowed for up to 16 paddr regions. The consumer > also needs special support since not all DMA allocations have to be > added to this filter. > > Signed-off-by: Sven Peter > --- > v1 -> v2: > - Moved to bindings/iommu since it is "Close enough to an IOMMU in > terms of its purpose" (Rob Herring) > > .../devicetree/bindings/iommu/apple,sart.yaml | 52 +++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 53 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iommu/apple,sart.yaml > Reviewed-by: Rob Herring