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R. Silva" , Heiko Stuebner , iommu@lists.linux.dev, Jean-Philippe Brucker , Jernej Skrabec , Jonathan Hunter , Joerg Roedel , Kees Cook , Konrad Dybcio , Krzysztof Kozlowski , Len Brown , linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, Lorenzo Pieralisi , Marek Szyprowski , Hector Martin , Matthias Brugger , Orson Zhai , "Rafael J. Wysocki" , Rob Clark , Robert Moore , Rob Herring , Robin Murphy , Samuel Holland , Sudeep Holla , Sven Peter , Thierry Reding , Krishna Reddy , virtualization@lists.linux.dev, Chen-Yu Tsai , Will Deacon , Yong Wu , Chunyan Zhang Cc: =?utf-8?q?Andr=C3=A9_Draszik?= , patches@lists.linux.dev Subject: [PATCH 11/30] iommu/sun50i: Move to iommu_of_get_single_iommu() Date: Wed, 29 Nov 2023 21:10:18 -0400 Message-ID: <11-v1-f82a05539a64+5042-iommu_fwspec_p2_jgg@nvidia.com> In-Reply-To: <0-v1-f82a05539a64+5042-iommu_fwspec_p2_jgg@nvidia.com> References: X-ClientProxiedBy: SN6PR08CA0012.namprd08.prod.outlook.com (2603:10b6:805:66::25) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|PH0PR12MB5484:EE_ X-MS-Office365-Filtering-Correlation-Id: 202f467c-ccd0-4067-7ecf-08dbf1412c4e 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)(366004)(346002)(136003)(396003)(39860400002)(376002)(230922051799003)(451199024)(1800799012)(186009)(64100799003)(1191002)(8936002)(110136005)(8676002)(316002)(66556008)(4326008)(86362001)(66476007)(6486002)(478600001)(66946007)(41300700001)(36756003)(921008)(7416002)(7366002)(2906002)(7406005)(5660300002)(38100700002)(2616005)(6512007)(6506007)(6666004)(83380400001)(26005)(202311291699003);DIR:OUT;SFP:1101; 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The driver ignores the ID from the OF, it looks like the instance can only do a single translation as the entire thing is managed with generic_single_device_group(). Since there is a single translation the ID presumably doesn't matter. Allocate a sun50i_iommu_device struct during probe to be like all the other drivers. Signed-off-by: Jason Gunthorpe --- drivers/iommu/sun50i-iommu.c | 60 +++++++++++++++++++++--------------- 1 file changed, 36 insertions(+), 24 deletions(-) diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c index 41484a5a399bb1..84038705cf657d 100644 --- a/drivers/iommu/sun50i-iommu.c +++ b/drivers/iommu/sun50i-iommu.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -95,6 +96,8 @@ #define SPAGE_SIZE 4096 +static const struct iommu_ops sun50i_iommu_ops; + struct sun50i_iommu { struct iommu_device iommu; @@ -110,6 +113,10 @@ struct sun50i_iommu { struct kmem_cache *pt_pool; }; +struct sun50i_iommu_device { + struct sun50i_iommu *iommu; +}; + struct sun50i_iommu_domain { struct iommu_domain domain; @@ -128,11 +135,6 @@ static struct sun50i_iommu_domain *to_sun50i_domain(struct iommu_domain *domain) return container_of(domain, struct sun50i_iommu_domain, domain); } -static struct sun50i_iommu *sun50i_iommu_from_dev(struct device *dev) -{ - return dev_iommu_priv_get(dev); -} - static u32 iommu_read(struct sun50i_iommu *iommu, u32 offset) { return readl(iommu->base + offset); @@ -760,7 +762,8 @@ static void sun50i_iommu_detach_domain(struct sun50i_iommu *iommu, static int sun50i_iommu_identity_attach(struct iommu_domain *identity_domain, struct device *dev) { - struct sun50i_iommu *iommu = dev_iommu_priv_get(dev); + struct sun50i_iommu_device *sdev = dev_iommu_priv_get(dev); + struct sun50i_iommu *iommu = sdev->iommu; struct sun50i_iommu_domain *sun50i_domain; dev_dbg(dev, "Detaching from IOMMU domain\n"); @@ -786,12 +789,9 @@ static struct iommu_domain sun50i_iommu_identity_domain = { static int sun50i_iommu_attach_device(struct iommu_domain *domain, struct device *dev) { + struct sun50i_iommu_device *sdev = dev_iommu_priv_get(dev); struct sun50i_iommu_domain *sun50i_domain = to_sun50i_domain(domain); - struct sun50i_iommu *iommu; - - iommu = sun50i_iommu_from_dev(dev); - if (!iommu) - return -ENODEV; + struct sun50i_iommu *iommu = sdev->iommu; dev_dbg(dev, "Attaching to IOMMU domain\n"); @@ -807,26 +807,37 @@ static int sun50i_iommu_attach_device(struct iommu_domain *domain, return 0; } -static struct iommu_device *sun50i_iommu_probe_device(struct device *dev) +static struct iommu_device * +sun50i_iommu_probe_device(struct iommu_probe_info *pinf) { + struct sun50i_iommu_device *sdev; struct sun50i_iommu *iommu; - iommu = sun50i_iommu_from_dev(dev); - if (!iommu) - return ERR_PTR(-ENODEV); + iommu = iommu_of_get_single_iommu(pinf, &sun50i_iommu_ops, 1, + struct sun50i_iommu, iommu); + if (IS_ERR(iommu)) + return ERR_CAST(iommu); + /* + * The ids are ignored because the all the devices are placed in a + * single group and the core code will enforce the same translation for + * all ids. + */ + + sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); + if (!sdev) + return ERR_PTR(-ENOMEM); + sdev->iommu = iommu; + + dev_iommu_priv_set(pinf->dev, sdev); return &iommu->iommu; } -static int sun50i_iommu_of_xlate(struct device *dev, - struct of_phandle_args *args) +static void sun50i_iommu_release_device(struct device *dev) { - struct platform_device *iommu_pdev = of_find_device_by_node(args->np); - unsigned id = args->args[0]; + struct sun50i_iommu_device *sdev = dev_iommu_priv_get(dev); - dev_iommu_priv_set(dev, platform_get_drvdata(iommu_pdev)); - - return iommu_fwspec_add_ids(dev, &id, 1); + kfree(sdev); } static const struct iommu_ops sun50i_iommu_ops = { @@ -834,8 +845,9 @@ static const struct iommu_ops sun50i_iommu_ops = { .pgsize_bitmap = SZ_4K, .device_group = generic_single_device_group, .domain_alloc_paging = sun50i_iommu_domain_alloc_paging, - .of_xlate = sun50i_iommu_of_xlate, - .probe_device = sun50i_iommu_probe_device, + .of_xlate = iommu_dummy_of_xlate, + .probe_device_pinf = sun50i_iommu_probe_device, + .release_device = sun50i_iommu_release_device, .default_domain_ops = &(const struct iommu_domain_ops) { .attach_dev = sun50i_iommu_attach_device, .flush_iotlb_all = sun50i_iommu_flush_iotlb_all,