From patchwork Thu Feb 1 21:05:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 13541820 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 6E7D3C4828D for ; Thu, 1 Feb 2024 21:06:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=dZyZihIG7sk2rKTukCAEIJdMmGTfLlz2N7g/LRspEWw=; b=42ZYSb4/JtxluI BMasR029gWBKa9DQH5dEGGHaZSFujE1uR1OH/cQRCtpAk8ijr52kyWmAG3hsm07LZ6UIJ3M4pezPJ iYIvLwJxJoS9rrNf0CPC7yq2WStzp5Zkk3m6SOaYwQFyIZcwoLIBqVKmp120NXIWXR7ZusCSU0SoT +B5f6b+49MYjWCKbR2yhJNUkf6x/wk0kcesu8J7WGwwo+dzmlR9P+9GqcWiHkIZlgLCDzulA6LmdT pnJfY/QyCghd3YOAe9beU2lGnNSIxNPWHU9ybbgVpMBtanREEBb7Z+FsJZz8nKMfnzK+u0tJoTO8z 9xdwX9boGiWzJqrxhLPg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rVeG0-00000009MEe-1tJ1; Thu, 01 Feb 2024 21:06:00 +0000 Received: from mx0b-0031df01.pphosted.com ([205.220.180.131]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rVeFt-00000009M7U-1WCa for linux-arm-kernel@lists.infradead.org; Thu, 01 Feb 2024 21:05:56 +0000 Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 411KYpWk019205; Thu, 1 Feb 2024 21:05:41 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id:mime-version:content-type; s= qcppdkim1; bh=36Hbbfy6eg9N9AdxGGFvD7+B/EgUhDiCcepj2PUN84c=; b=lb 4XniqiUasFiGTD67aM3E8dXjQLgP7kmiUxaFr58DmPHTe1gH/cx0cpFCEGHQWogy m48MjNeZo9y4DGgPWwVHflv4Q+3aRwm2vITO6LN7UoLhuvKPamFzT8ehs9KRbEyX ZtLvZKMOLyBYd05K6MxQK5mmIm65JpdNYXWN5Tfau84mqxdooNCREt/ZkTI4wDJV eJgVmI1vn+prlzrnpPXLEFyP2coXD7Tc9np0DfT5pXT0c8gsFdM825p85Y+fKR+f AmpEy4Z4XS6ECIqjEw2oxDjoNGRS7yBSqzDCOK3+kTJFhzO/xWarqhTXNYfk0eq6 j87A0g94hgfhjZQU1z4A== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3w0619j7k3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 01 Feb 2024 21:05:40 +0000 (GMT) Received: from nasanex01a.na.qualcomm.com (nasanex01a.na.qualcomm.com [10.52.223.231]) by NASANPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 411L5dWg008946 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 1 Feb 2024 21:05:39 GMT Received: from hu-c-gdjako-lv.qualcomm.com (10.49.16.6) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Thu, 1 Feb 2024 13:05:38 -0800 From: Georgi Djakov To: , , , , , , CC: , , , , , , , , , , , Subject: [PATCH v4 00/10] Add support for Translation Buffer Units Date: Thu, 1 Feb 2024 13:05:19 -0800 Message-ID: <20240201210529.7728-1-quic_c_gdjako@quicinc.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: wcoKPkfDzTblpkFnSgghzmqvNVXeKkwL X-Proofpoint-ORIG-GUID: wcoKPkfDzTblpkFnSgghzmqvNVXeKkwL X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-01_06,2024-01-31_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 clxscore=1011 priorityscore=1501 phishscore=0 impostorscore=0 bulkscore=0 mlxlogscore=801 malwarescore=0 spamscore=0 adultscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2401190000 definitions=main-2402010163 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240201_130553_604225_AF7812EB X-CRM114-Status: GOOD ( 20.89 ) 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 The TCUs (Translation Control Units) and TBUs (Translation Buffer Units) are key components of the MMU-500. Multiple TBUs are connected to a single TCU over an interconnect. Each TBU contains a TLB that caches page tables. The MMU-500 implements a TBU for each connected master, and the TBU is designed, so that it is local to the master. A common TBU DT schema is added to describe the TBUs. The Qualcomm SDM845 and SC7280 platforms have an implementation of the SMMU-500, that has multiple TBUs. A vendor-specific DT schema is added to describe the resources for each TBU (register space, power-domains, interconnects and clocks). The TBU driver will manage the resources and allow the system to operate the TBUs during a context fault to obtain details by doing s1 inv, software + hardware page table walks etc. This is implemented with ATOS/eCATs as the ATS feature is not supported. Being able to query the TBUs is useful for debugging various hardware/software issues on these platforms. v4: - Create a common TBU schema. Move the vendor-specific properties into a separate schema that references the common one. (Rob) - Drop unused DT labels in example, fix regex. (Rob) - Properly rebase on latest code. v3: https://lore.kernel.org/r/20231220060236.18600-1-quic_c_gdjako@quicinc.com - Having a TBU is not Qualcomm specific, so allow having TBU child nodes with no specific constraints on properties. For some of the vendor compatibles however, add a schema to describe specific properties and allow validation. (Rob) - Drop the useless reg-names DT property on TBUs. (Rob) - Make the stream-id-range DT property a common one. (Rob) - Fix the DT example. (Rob) - Minor fixes on the TBU driver. - Add support for SC7280 platforms. v2: https://lore.kernel.org/r/20231118042730.2799-1-quic_c_gdjako@quicinc.com - Improve DT binding description, add full example. (Konrad) - Drop Qcom specific stuff from the generic binding. (Rob) - Unconditionally try to populate subnodes. (Konrad) - Improve TBU driver commit text, remove memory barriers. (Bjorn) - Move TBU stuff into separate file. Make the driver builtin. - TODO: Evaluate whether to keep TBU support as a separate driver or just instantiate things from qcom_smmu_impl_init() v1: https://lore.kernel.org/r/20231019021923.13939-1-quic_c_gdjako@quicinc.com Georgi Djakov (10): dt-bindings: iommu: Add Translation Buffer Unit bindings dt-bindings: iommu: Add Qualcomm TBU bindings iommu/arm-smmu-qcom: Add support for TBUs iommu/arm-smmu-qcom-tbu: Add Qualcomm TBU driver iommu/arm-smmu: Allow using a threaded handler for context interrupts iommu/arm-smmu-qcom: Use a custom context fault handler for sdm845 arm64: dts: qcom: sdm845: Add DT nodes for the TBUs dt-bindings: arm-smmu: Add TBU support for sc7280 iommu/arm-smmu-qcom: Use the custom fault handler on more platforms arm64: dts: qcom: sc7280: Add DT nodes for the TBUs .../devicetree/bindings/iommu/arm,smmu.yaml | 26 + .../bindings/iommu/qcom,qsmmuv500-tbu.yaml | 71 +++ .../devicetree/bindings/iommu/tbu-common.yaml | 28 + arch/arm64/boot/dts/qcom/sc7280.dtsi | 97 ++++ arch/arm64/boot/dts/qcom/sdm845.dtsi | 74 +++ drivers/iommu/Kconfig | 8 + drivers/iommu/arm/arm-smmu/Makefile | 1 + .../iommu/arm/arm-smmu/arm-smmu-qcom-tbu.c | 496 ++++++++++++++++++ drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 17 + drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h | 6 +- drivers/iommu/arm/arm-smmu/arm-smmu.c | 12 +- drivers/iommu/arm/arm-smmu/arm-smmu.h | 3 + 12 files changed, 836 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/iommu/qcom,qsmmuv500-tbu.yaml create mode 100644 Documentation/devicetree/bindings/iommu/tbu-common.yaml create mode 100644 drivers/iommu/arm/arm-smmu/arm-smmu-qcom-tbu.c