From patchwork Fri Jun 16 15:14:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 13282876 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 9D107EB64D7 for ; Fri, 16 Jun 2023 15:18:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345650AbjFPPSV (ORCPT ); Fri, 16 Jun 2023 11:18:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232085AbjFPPSU (ORCPT ); Fri, 16 Jun 2023 11:18:20 -0400 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3DE4430FE for ; Fri, 16 Jun 2023 08:18:19 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id d2e1a72fcca58-6667643e4b3so756470b3a.2 for ; Fri, 16 Jun 2023 08:18:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1686928699; x=1689520699; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=JjK5uSBUBCtKUiHKGw2fDzcH80L9Te7xYyX5HYmSKZk=; b=Gazntjz7fU9vAVPqqzRdDRac27cecBITu2YvqyJ/AerXxYtOfZN2wz718g7xcI3NJj iGK8DZvU6z1+Z3BId6izQhVmrGv1ygnshSs9Q09cAXjmSoRXh1OzSNajVzmt9kbmlqwM zgNgQpgihqEhJaCqPN565bpB2w/NQFTyfXs2o= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686928699; x=1689520699; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=JjK5uSBUBCtKUiHKGw2fDzcH80L9Te7xYyX5HYmSKZk=; b=MgY1MBwUve0ZvRpHZ2+tkF92ZB6LQ/wo6r2nh/KvoLDLbMCn2HUhjg3PIOgmUenCmU p8Qx8sy/ZEPhhQCh5+fDnluqsiuHrfe7JKfwjY1TWrKYDW9qTwo7vSHYAjA2UWUbognL MrOATBE+QZluuNtICeS3/KRWktmVcmSy0ByzXMSjq15j6YnGyv79pQxDcCS+SJorS/bj occkAs9A06byLEIU6e4nlpTIT8vRgM3FxSQxi/oB7NxX34DXoe6fk5Ky9uCimj/MPdm6 1maAyqUw2tVH9CYzgI7/OZrBN33+5/p++jao8spFz7AO3RsEKJwoXDtrsstltK1dejLD IF+g== X-Gm-Message-State: AC+VfDzpB7YqfvsW7fMgcxvZIciIcrtli3Kp7OYyYenpmVuOjHm+Ctmr S6CqzjHw1I6HpwRufCy4XrCWfA== X-Google-Smtp-Source: ACHHUZ4BIE6TbLK8kpe1owsqwPPBjFMHGvq1+gRfy4HufbUwKn/5NGiepHfgtjSj1AGPlndAamWF0w== X-Received: by 2002:a05:6a21:7890:b0:11f:1aa2:666b with SMTP id bf16-20020a056a21789000b0011f1aa2666bmr1412485pzc.32.1686928698728; Fri, 16 Jun 2023 08:18:18 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:9d:2:3cfa:2bcd:1a5:27ce]) by smtp.gmail.com with ESMTPSA id a12-20020aa780cc000000b0063d24fcc2besm4593656pfn.125.2023.06.16.08.18.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Jun 2023 08:18:18 -0700 (PDT) From: Douglas Anderson To: andersson@kernel.org Cc: amit.pundir@linaro.org, Will Deacon , sumit.semwal@linaro.org, linux-arm-msm@vger.kernel.org, konrad.dybcio@somainline.org, linux-arm-kernel@lists.infradead.org, Stephan Gerhold , Manivannan Sadhasivam , Nikita Travkin , Stephen Boyd , Sibi Sankar , Douglas Anderson , Andy Gross , Conor Dooley , Das Srinagesh , Konrad Dybcio , Krzysztof Kozlowski , Rob Herring , Robert Marko , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/4] dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent Date: Fri, 16 Jun 2023 08:14:38 -0700 Message-ID: <20230616081440.v2.1.Ie79b5f0ed45739695c9970df121e11d724909157@changeid> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Trogdor devices use firmware backed by TF-A instead of Qualcomm's normal TZ. On TF-A we end up mapping memory as cacheable. Specifically, you can see in Trogdor's TF-A code [1] in qti_sip_mem_assign() that we call qti_mmap_add_dynamic_region() with MT_RO_DATA. This translates down to MT_MEMORY instead of MT_NON_CACHEABLE or MT_DEVICE. Let's allow devices like trogdor to be described properly by allowing "dma-coherent" in the SCM node. Signed-off-by: Douglas Anderson Acked-by: Krzysztof Kozlowski --- Changes in v2: - Bindings change new for v2. Documentation/devicetree/bindings/firmware/qcom,scm.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml index 367d04ad1923..83381f3a1341 100644 --- a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml +++ b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml @@ -71,6 +71,8 @@ properties: minItems: 1 maxItems: 3 + dma-coherent: true + interconnects: maxItems: 1