From patchwork Mon Jul 24 17:22:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Gunthorpe X-Patchwork-Id: 13325224 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 2F09FC0015E for ; Mon, 24 Jul 2023 18:30:39 +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:References:In-Reply-To: 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: List-Owner; bh=Jm5xezZEEkAu/Ow66Q6Y+2zIJQa36N8zNrU0IdyavTg=; b=u8PwUL9/BT+UBn zAu96PIVh+mBiye1SXuUejoPU8j+r3qPpuhRyVLQ10PmTgEcYT7MuBt+hYzk5lEs8d2nJCRbHldWq jdA6lQ4OwgWZPRShzrRrgjXbHCfGDsqMRBq3Cjn33onpyg+z10OG6b9ESjBBtmPCaYdlnJVDYPPgS 7L74RWQKoGhT0fwUNRMoPipRlhYCL42mZrxnHvQCCr71//KnB/PTyY5Bm4rkhngwsPuIvETopnq5R 0wPtP6w1Pp54oDcmskQa1wzWhfLZSriTmEMVCZkB8UT32+EibT8gdo/G21O/1p+VX3dBS8O7ktAar xrpSFeeOhxxWYi2NyEoQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qO0K5-005CXS-2k; Mon, 24 Jul 2023 18:30:21 +0000 Received: from mail-mw2nam04on2060d.outbound.protection.outlook.com ([2a01:111:f400:7e8c::60d] helo=NAM04-MW2-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qNzGS-00500M-21; Mon, 24 Jul 2023 17:22:34 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=VX4phZzS+E72sU71eBO1NFA7mfpvhnQn1AR6OeX4laKPrmfbhg1ABsALLId2KxXgWaSzsRFKZnX7nlT8epiIwPE8gKl2QC/U9Ydh50BQZ08BT7f54a74+/0E+GBfEa/BXc3ZoMyxLFCuoEcMmdwy9yMhVMYzVZvUwLYJJVlD/WbgLlhBSI5/fqZATtazEtG5i84AtwB/3FtXOyxZdkU33OhA0QuTvCol5U9zE8NGOpIQnb6wRtlS3a2QNlIBG8N7oXuyCtAVQbSTDVg/cw/DPZe6q++bmGFAVrv6or1oB4BPCEsarPjtDeM9bne5a030zKrzpa/gwQTU+O+z7ni9HA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=tuioqqLJ9nwTxiQOZ8nAoXdBA08XbZNNbPO6KQsUrqM=; b=Mj/ziqi9Wa9B3wro0wKvZMB4MWyxMBrrA7owRGvMnaPD5HY0jdp+yH+4djY7gDOlhLQ8HFR5mBy7WuzKc2m5qcaJY6Y9Ku9+6aQtt3xr45t6U9PqNSxURDnPqdcFcx3kGsdX/pYa/vgmvU9aZjUXu5+rYOY2eIvfcQMEchGMuzMKCA+nFFXf+hKhxt68EVYfHlNkALJWrIIP8/exKUq2GzKrrXfPk0nlz8jdLG0QkxePbS5IyGSylo8GK9IekaKwMW2DKNWM9I3Y76HFBM5Y0eCjgDZj3FdVr4HVQlHozjcreYCp0q+DEwwHUwUT1tMG3RQBZtkhGCgT0hbXGsRFMw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=tuioqqLJ9nwTxiQOZ8nAoXdBA08XbZNNbPO6KQsUrqM=; b=Bw7mt5ewhjuo8RLYONK9lUJEB6sHanYcACrWKqUjWTGQa6WwURt1BBPVKUGt5vDLtPmKYtozLChy0WW9KtBXd3W0UUAJ31cHEFBqMMVrM2smF4iPbaEvNVluDi9j7LXSE98Z7tVfLYYEciuOt4WHFP9ghRGwYU++MN1/EfA4fosqOv//s1pVk596/xyl8AyCeMUZpqFISBokKsnJoOQiaBuDk2+cK+PnW9zXTqP/GtlRWSslgx06Mqjsuhav/JMe2v68/JeMpMwbQJ/V5ufLfFCOqUfufRuwngO0E6VGUAG3SymXlQyxXzQ2fkdmjiFM5IM4dW/otyuLr4zB9MNk2w== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) by CH0PR12MB5252.namprd12.prod.outlook.com (2603:10b6:610:d3::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6609.32; Mon, 24 Jul 2023 17:22:24 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::5111:16e8:5afe:1da1]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::5111:16e8:5afe:1da1%6]) with mapi id 15.20.6609.032; Mon, 24 Jul 2023 17:22:24 +0000 From: Jason Gunthorpe To: Andy Gross , Alim Akhtar , Bjorn Andersson , AngeloGioacchino Del Regno , Baolin Wang , Christophe Leroy , Gerald Schaefer , Heiko Stuebner , iommu@lists.linux.dev, Jernej Skrabec , Jonathan Hunter , Joerg Roedel , Kevin Tian , Konrad Dybcio , Krzysztof Kozlowski , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-s390@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, Russell King , linuxppc-dev@lists.ozlabs.org, Matthias Brugger , Matthew Rosato , Michael Ellerman , Nicholas Piggin , Orson Zhai , Rob Clark , Robin Murphy , Samuel Holland , Thierry Reding , Krishna Reddy , Chen-Yu Tsai , Will Deacon , Yong Wu , Chunyan Zhang Cc: Lu Baolu , Dmitry Osipenko , Marek Szyprowski , Nicolin Chen , Niklas Schnelle , Steven Price , Thierry Reding Subject: [PATCH v5 10/25] iommu/exynos: Implement an IDENTITY domain Date: Mon, 24 Jul 2023 14:22:00 -0300 Message-ID: <10-v5-d0a204c678c7+3d16a-iommu_all_defdom_jgg@nvidia.com> In-Reply-To: <0-v5-d0a204c678c7+3d16a-iommu_all_defdom_jgg@nvidia.com> References: X-ClientProxiedBy: BL1P222CA0021.NAMP222.PROD.OUTLOOK.COM (2603:10b6:208:2c7::26) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|CH0PR12MB5252:EE_ X-MS-Office365-Filtering-Correlation-Id: 339f789d-ca7b-4e71-2b42-08db8c6a8866 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:LV2PR12MB5869.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(4636009)(376002)(346002)(396003)(136003)(39860400002)(366004)(451199021)(2906002)(2616005)(83380400001)(4326008)(316002)(6512007)(66476007)(66556008)(66946007)(107886003)(41300700001)(6486002)(36756003)(478600001)(6666004)(86362001)(110136005)(54906003)(921005)(38100700002)(186003)(7406005)(7416002)(8676002)(8936002)(6506007)(5660300002)(26005);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 339f789d-ca7b-4e71-2b42-08db8c6a8866 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Jul 2023 17:22:18.7211 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: rhOAg1bb53PF6fMCYa20t57lkZkvU8kAjzXzrZ+2b70tedQrtyvQCDufJ6DnmTJl X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR12MB5252 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230724_102232_695406_D968FC9C X-CRM114-Status: GOOD ( 15.18 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org What exynos calls exynos_iommu_detach_device is actually putting the iommu into identity mode. Move to the new core support for ARM_DMA_USE_IOMMU by defining ops->identity_domain. Tested-by: Marek Szyprowski Acked-by: Marek Szyprowski Signed-off-by: Jason Gunthorpe --- drivers/iommu/exynos-iommu.c | 66 +++++++++++++++++------------------- 1 file changed, 32 insertions(+), 34 deletions(-) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index c275fe71c4db32..5e12b85dfe8705 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -24,6 +24,7 @@ typedef u32 sysmmu_iova_t; typedef u32 sysmmu_pte_t; +static struct iommu_domain exynos_identity_domain; /* We do not consider super section mapping (16MB) */ #define SECT_ORDER 20 @@ -829,7 +830,7 @@ static int __maybe_unused exynos_sysmmu_suspend(struct device *dev) struct exynos_iommu_owner *owner = dev_iommu_priv_get(master); mutex_lock(&owner->rpm_lock); - if (data->domain) { + if (&data->domain->domain != &exynos_identity_domain) { dev_dbg(data->sysmmu, "saving state\n"); __sysmmu_disable(data); } @@ -847,7 +848,7 @@ static int __maybe_unused exynos_sysmmu_resume(struct device *dev) struct exynos_iommu_owner *owner = dev_iommu_priv_get(master); mutex_lock(&owner->rpm_lock); - if (data->domain) { + if (&data->domain->domain != &exynos_identity_domain) { dev_dbg(data->sysmmu, "restoring state\n"); __sysmmu_enable(data); } @@ -980,17 +981,20 @@ static void exynos_iommu_domain_free(struct iommu_domain *iommu_domain) kfree(domain); } -static void exynos_iommu_detach_device(struct iommu_domain *iommu_domain, - struct device *dev) +static int exynos_iommu_identity_attach(struct iommu_domain *identity_domain, + struct device *dev) { - struct exynos_iommu_domain *domain = to_exynos_domain(iommu_domain); struct exynos_iommu_owner *owner = dev_iommu_priv_get(dev); - phys_addr_t pagetable = virt_to_phys(domain->pgtable); + struct exynos_iommu_domain *domain; + phys_addr_t pagetable; struct sysmmu_drvdata *data, *next; unsigned long flags; - if (!has_sysmmu(dev) || owner->domain != iommu_domain) - return; + if (owner->domain == identity_domain) + return 0; + + domain = to_exynos_domain(owner->domain); + pagetable = virt_to_phys(domain->pgtable); mutex_lock(&owner->rpm_lock); @@ -1009,15 +1013,25 @@ static void exynos_iommu_detach_device(struct iommu_domain *iommu_domain, list_del_init(&data->domain_node); spin_unlock(&data->lock); } - owner->domain = NULL; + owner->domain = identity_domain; spin_unlock_irqrestore(&domain->lock, flags); mutex_unlock(&owner->rpm_lock); - dev_dbg(dev, "%s: Detached IOMMU with pgtable %pa\n", __func__, - &pagetable); + dev_dbg(dev, "%s: Restored IOMMU to IDENTITY from pgtable %pa\n", + __func__, &pagetable); + return 0; } +static struct iommu_domain_ops exynos_identity_ops = { + .attach_dev = exynos_iommu_identity_attach, +}; + +static struct iommu_domain exynos_identity_domain = { + .type = IOMMU_DOMAIN_IDENTITY, + .ops = &exynos_identity_ops, +}; + static int exynos_iommu_attach_device(struct iommu_domain *iommu_domain, struct device *dev) { @@ -1026,12 +1040,11 @@ static int exynos_iommu_attach_device(struct iommu_domain *iommu_domain, struct sysmmu_drvdata *data; phys_addr_t pagetable = virt_to_phys(domain->pgtable); unsigned long flags; + int err; - if (!has_sysmmu(dev)) - return -ENODEV; - - if (owner->domain) - exynos_iommu_detach_device(owner->domain, dev); + err = exynos_iommu_identity_attach(&exynos_identity_domain, dev); + if (err) + return err; mutex_lock(&owner->rpm_lock); @@ -1407,26 +1420,12 @@ static struct iommu_device *exynos_iommu_probe_device(struct device *dev) return &data->iommu; } -static void exynos_iommu_set_platform_dma(struct device *dev) -{ - struct exynos_iommu_owner *owner = dev_iommu_priv_get(dev); - - if (owner->domain) { - struct iommu_group *group = iommu_group_get(dev); - - if (group) { - exynos_iommu_detach_device(owner->domain, dev); - iommu_group_put(group); - } - } -} - static void exynos_iommu_release_device(struct device *dev) { struct exynos_iommu_owner *owner = dev_iommu_priv_get(dev); struct sysmmu_drvdata *data; - exynos_iommu_set_platform_dma(dev); + WARN_ON(exynos_iommu_identity_attach(&exynos_identity_domain, dev)); list_for_each_entry(data, &owner->controllers, owner_node) device_link_del(data->link); @@ -1457,6 +1456,7 @@ static int exynos_iommu_of_xlate(struct device *dev, INIT_LIST_HEAD(&owner->controllers); mutex_init(&owner->rpm_lock); + owner->domain = &exynos_identity_domain; dev_iommu_priv_set(dev, owner); } @@ -1471,11 +1471,9 @@ static int exynos_iommu_of_xlate(struct device *dev, } static const struct iommu_ops exynos_iommu_ops = { + .identity_domain = &exynos_identity_domain, .domain_alloc = exynos_iommu_domain_alloc, .device_group = generic_device_group, -#ifdef CONFIG_ARM - .set_platform_dma_ops = exynos_iommu_set_platform_dma, -#endif .probe_device = exynos_iommu_probe_device, .release_device = exynos_iommu_release_device, .pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE,