From patchwork Thu Aug 3 00:07:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Gunthorpe X-Patchwork-Id: 709692 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 9E629C04FE1 for ; Thu, 3 Aug 2023 00:30:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229624AbjHCAan (ORCPT ); Wed, 2 Aug 2023 20:30:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36450 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229832AbjHCAam (ORCPT ); Wed, 2 Aug 2023 20:30:42 -0400 Received: from NAM02-SN1-obe.outbound.protection.outlook.com (mail-sn1nam02on2046.outbound.protection.outlook.com [40.107.96.46]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 633F713D; Wed, 2 Aug 2023 17:30:41 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=iXS1EGv5y8t6SYjHNxUs/8B6U3N172RH0FDqffgXQreP7nzbNwK7A/SI9HKeDzpCfP7D7xgsvak4cYsTI15sGSP8h6sxBXNtK2LIHz/QKcfjAFUgLP2p8aIV/XwnELd9fSYhMpAvfvSoYBfSyecKzakeYxSizR41r/TUXvjOqS2seIdNCy8RjMI1GcV6i9eH1t8sfZA80DayW9HfKlbCf//RM5x5YPaxLWSPx2r8XHtSXQAVfuUlUiUlqhH1pULkGynG1gan2n2vfPJsks3xdxmS8FZcwdpc2S9fgDIv6DvGWr61b1YgOtlZDheymOC+Zai29b013UNogqzBVCS2TA== 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=QWlAVH940jarLjjhXOd3ThQAYZcJsaVIx+2S0Gsf8VQCwHPGOwl3l/6LeR16NY1zq3Gr56uhfFDbMu7BsneZF6llZPndcJTEr1603XkrFRSD78MDYQhA5nyXSRWXI58PX0wxSECelmXskE0MLpVq8uyPWfFye0ZCfStLoAzbPLi3qFt/97saEuq+V0DEKfgixfHypofri7D9NSpY57VLaERok4o7k7dUDx8phCmKpWZRr0ftKDVD/XyTthNCc78Skm2A9GM5WwGNqVbuUuj8NloYHKRfjSQqenLY7R7o5fmNCZxKT4QyudMRv3w2J8JbNWv6HwODwqsPr7kvMrtEbA== 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=g0+/CMjkbB0WkpBc1Jb8tLQu/bgnMaYBQtdGVjcXhfkWOJk1Iu22MKLFTxwHfp4Lt7nFbn9K7I+t6m2bK2qXoK1rqhglELdkEbsr91aMrp1HteRem8AF5OQ8QFCtKcx8MLOVA+zsdJMNOQB1tFSfgJwWyMPMrhRgX2mPKiPKyuhv3tNUDvysH38vo70tq9uW/x/CnjY8u9t7UZM5+blGiZpbyCfF8fIBMse1gC+0j/N5ZCW4hANRJ0drWsDavAYmBLFg7ULVnNGSdWL71FtEqoymoJeR8Tq4Vs9sH33KvA8h37k2e8ZiTscVnqp8MSbQMY2DbaI7bjx5YOlnopV9sw== 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 MW4PR12MB7261.namprd12.prod.outlook.com (2603:10b6:303:229::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6631.44; Thu, 3 Aug 2023 00:30:38 +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 15.20.6631.045; Thu, 3 Aug 2023 00:30:37 +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 v6 10/25] iommu/exynos: Implement an IDENTITY domain Date: Wed, 2 Aug 2023 21:07:57 -0300 Message-ID: <10-v6-e8114faedade+425-iommu_all_defdom_jgg@nvidia.com> In-Reply-To: <0-v6-e8114faedade+425-iommu_all_defdom_jgg@nvidia.com> References: X-ClientProxiedBy: BL1PR13CA0105.namprd13.prod.outlook.com (2603:10b6:208:2b9::20) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|MW4PR12MB7261:EE_ X-MS-Office365-Filtering-Correlation-Id: fe4e2eac-ba95-477e-3675-08db93b8d829 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)(346002)(39860400002)(396003)(376002)(366004)(136003)(451199021)(5660300002)(2616005)(36756003)(38100700002)(921005)(2906002)(316002)(26005)(83380400001)(186003)(7406005)(6506007)(8676002)(8936002)(6666004)(7416002)(54906003)(6512007)(66476007)(6486002)(478600001)(41300700001)(86362001)(66556008)(110136005)(4326008)(66946007)(107886003); 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: fe4e2eac-ba95-477e-3675-08db93b8d829 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Aug 2023 00:30:31.4370 (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: QaeELlwN5/gdlODTRf6qSAv4wC5aJkyKljfzTVP1NSPLkHrWU4tbh8waSM/ogcMd X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB7261 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.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,