From patchwork Wed Sep 13 13:43:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Gunthorpe X-Patchwork-Id: 13383080 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 DE0AFEDEC51 for ; Wed, 13 Sep 2023 13:46:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:MIME-Version:Content-Type: Content-Transfer-Encoding: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=DQcdF0HxywOpBQqZiGOJQ4kUbIVpQIl4n/1FcryEkFQ=; b=yS7blMR+r8DWEPLgxrkBpAVnOf c+NtHiZ9ZSi+D9LNHdC1WzhTAsGY4m4c0XY1KS4GMnoewH/d+XuSDTscmVmWt0RO4UYZY+y3KDvav HAISMwkuxEj/nZpSh8geSbDt7N7PxDY3eQHeXadIEkydrKuB3+/6o9oBZd4tQo2m39MtmaJAiO7m4 VUrRAL5YGPdGWjR+CF/p7BL0GucaMBYnwrz1/EpP5YZWpBDStljNDmXPh6Ru52/d9nQmJEa5BSe5f 0fW+GbQX9Fto4bSiiBRPDJlxIrcmRmYs8ZmJLkatS8Lnu2PVkR1bH5w1B9PEpz04XjjnLWWIke0FB d30DJh7g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qgQCf-0062m2-2s; Wed, 13 Sep 2023 13:46:49 +0000 Received: from mail-dm6nam12on2061a.outbound.protection.outlook.com ([2a01:111:f400:fe59::61a] helo=NAM12-DM6-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qgQAP-0060P8-1a; Wed, 13 Sep 2023 13:44:32 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=KPVovjoXHvTnO0pXAbRxquagSQdlifICCiaJkCeO9/6FVkv1u0t2LIliDi+TmbIp7aFdUoUYqhnY/PpKrLCkW/8GnVh00IwEV+v5pj6HHQTEiWlvScYLdzszaiV8D4Ckjt9LZzzV6PH3dWKw+7UGD5Jd1g2o71EobPZGRNY3bKG30jMGe45p0GI8vGkbdVHXgIom2MhJPRMGgwoKFHSR87G01/Z23zBDzSQDIJISYCHPbrS9jikkQoMbBIihvFQjQyn04VUrpErvHTqwTKG4xhklf3EGpy2+zFU8+9h0m+gJ0dWsJVNJmBCKaIWeS3qlUcSqqXP5I740cJ7YEsovuQ== 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=DQcdF0HxywOpBQqZiGOJQ4kUbIVpQIl4n/1FcryEkFQ=; b=gDjw7pgvfh8FAhp3DPYUFJiIQy0gbV0bl43tyq+aDyS8G84dQ+JW+9emf6bwHimb9O+cAFcrpF2GWyK7Z9GUo7u0Jd/dNFFQb/3mFfmQKPFYNH9IPxNjzp3l1L7sYcyMwBRhnNFwqBSpZcUnOhLhbtAcxXRniSwcompZ/eV1cb3lTj1qeG1/bGLgPmQ6G17RbL13W7z2MnD5Jk4/0WXhRv7RzoWgsSg2QQdnrlw0RrskP5fqk7syA5bbbFhkN/Yxv8uGHNq9YyKD2TBtCfGiQUfACLR06cHF8yZXeXEuUrBcRejYvXMD/DpOJvrmnKi1cTz9C89NIyKDAP0pIMCuLA== 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=DQcdF0HxywOpBQqZiGOJQ4kUbIVpQIl4n/1FcryEkFQ=; b=DGdg1K0LFFcLdM/UDBEYTe/vMzMTZUE9Lyd55zODyB+5xK3wGtzOFox+qAzPm2w7CLonVOF2BAYaF2jtFkioeVdM13owSvo34dbdlH+qg+Mmgacg+PJKgY1MDKb14qCaavIStZYCYH0KAvGfyqPD8gGmD4S4jWn43SthHruqC3I1igg9cnmHqqWFbXR2DRVL5btTCXsYmcP4n1qLGzfo5ax3PjxJlOV+WF8LfK+CaDfpuFvmgDiYXGwpL9sFxMZ4bSGo0Q8QD9lsXysT8UekgxbQlrEx2DUcrYjoZOnD7aYgEZoLsNDXUlnrl3K5P8u2Qz+6TZC84ehgmj2viNCVvQ== 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 SJ2PR12MB7848.namprd12.prod.outlook.com (2603:10b6:a03:4ca::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6768.31; Wed, 13 Sep 2023 13:44:16 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::faf:4cd0:ae27:1073]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::faf:4cd0:ae27:1073%6]) with mapi id 15.20.6768.036; Wed, 13 Sep 2023 13:44:16 +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 , Jerry Snitselaar , Marek Szyprowski , Nicolin Chen , Niklas Schnelle , Steven Price , Thierry Reding Subject: [PATCH v8 22/24] iommu: Add ops->domain_alloc_paging() Date: Wed, 13 Sep 2023 10:43:55 -0300 Message-ID: <22-v8-81230027b2fa+9d-iommu_all_defdom_jgg@nvidia.com> In-Reply-To: <0-v8-81230027b2fa+9d-iommu_all_defdom_jgg@nvidia.com> References: X-ClientProxiedBy: MN2PR03CA0003.namprd03.prod.outlook.com (2603:10b6:208:23a::8) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|SJ2PR12MB7848:EE_ X-MS-Office365-Filtering-Correlation-Id: 1c23e77d-dcb5-45a4-ddf5-08dbb45f84b4 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:(13230031)(376002)(366004)(136003)(346002)(39860400002)(396003)(1800799009)(186009)(451199024)(83380400001)(86362001)(6512007)(921005)(66946007)(110136005)(2616005)(478600001)(107886003)(6666004)(38100700002)(6506007)(6486002)(26005)(316002)(4326008)(54906003)(66476007)(8936002)(66556008)(41300700001)(36756003)(8676002)(5660300002)(2906002)(7406005)(7416002);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: 1c23e77d-dcb5-45a4-ddf5-08dbb45f84b4 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Sep 2023 13:44:14.6445 (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: hhBnNIkNfGAR0nOByu6fGDu382Xv3IyVUEelbUCJ9rsXlDp7ICgwMNcpis+fZSyW X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB7848 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230913_064429_585723_3C048323 X-CRM114-Status: GOOD ( 20.57 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org This callback requests the driver to create only a __IOMMU_DOMAIN_PAGING domain, so it saves a few lines in a lot of drivers needlessly checking the type. More critically, this allows us to sweep out all the IOMMU_DOMAIN_UNMANAGED and IOMMU_DOMAIN_DMA checks from a lot of the drivers, simplifying what is going on in the code and ultimately removing the now-unused special cases in drivers where they did not support IOMMU_DOMAIN_DMA. domain_alloc_paging() should return a struct iommu_domain that is functionally compatible with ARM_DMA_USE_IOMMU, dma-iommu.c and iommufd. Be forwards looking and pass in a 'struct device *' argument. We can provide this when allocating the default_domain. No drivers will look at this. Tested-by: Steven Price Tested-by: Marek Szyprowski Tested-by: Nicolin Chen Reviewed-by: Lu Baolu Reviewed-by: Jerry Snitselaar Signed-off-by: Jason Gunthorpe --- drivers/iommu/iommu.c | 17 ++++++++++++++--- include/linux/iommu.h | 3 +++ 2 files changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 38856d542afc35..fe033043be467a 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2041,6 +2041,7 @@ void iommu_set_fault_handler(struct iommu_domain *domain, EXPORT_SYMBOL_GPL(iommu_set_fault_handler); static struct iommu_domain *__iommu_domain_alloc(const struct iommu_ops *ops, + struct device *dev, unsigned int type) { struct iommu_domain *domain; @@ -2048,8 +2049,13 @@ static struct iommu_domain *__iommu_domain_alloc(const struct iommu_ops *ops, if (alloc_type == IOMMU_DOMAIN_IDENTITY && ops->identity_domain) return ops->identity_domain; + else if (type & __IOMMU_DOMAIN_PAGING && ops->domain_alloc_paging) + domain = ops->domain_alloc_paging(dev); + else if (ops->domain_alloc) + domain = ops->domain_alloc(alloc_type); + else + return NULL; - domain = ops->domain_alloc(alloc_type); if (!domain) return NULL; @@ -2074,14 +2080,19 @@ static struct iommu_domain *__iommu_domain_alloc(const struct iommu_ops *ops, static struct iommu_domain * __iommu_group_domain_alloc(struct iommu_group *group, unsigned int type) { - return __iommu_domain_alloc(group_iommu_ops(group), type); + struct device *dev = + list_first_entry(&group->devices, struct group_device, list) + ->dev; + + return __iommu_domain_alloc(group_iommu_ops(group), dev, type); } struct iommu_domain *iommu_domain_alloc(const struct bus_type *bus) { if (bus == NULL || bus->iommu_ops == NULL) return NULL; - return __iommu_domain_alloc(bus->iommu_ops, IOMMU_DOMAIN_UNMANAGED); + return __iommu_domain_alloc(bus->iommu_ops, NULL, + IOMMU_DOMAIN_UNMANAGED); } EXPORT_SYMBOL_GPL(iommu_domain_alloc); diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 511dfeea527215..3f173307434dcc 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -239,6 +239,8 @@ struct iommu_iotlb_gather { * use. The information type is one of enum iommu_hw_info_type defined * in include/uapi/linux/iommufd.h. * @domain_alloc: allocate iommu domain + * @domain_alloc_paging: Allocate an iommu_domain that can be used for + * UNMANAGED, DMA, and DMA_FQ domain types. * @probe_device: Add device to iommu driver handling * @release_device: Remove device from iommu driver handling * @probe_finalize: Do final setup work after the device is added to an IOMMU @@ -273,6 +275,7 @@ struct iommu_ops { /* Domain allocation and freeing by the iommu driver */ struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type); + struct iommu_domain *(*domain_alloc_paging)(struct device *dev); struct iommu_device *(*probe_device)(struct device *dev); void (*release_device)(struct device *dev);