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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 01/30] iommu/of: Make a of_iommu_for_each_id() Date: Wed, 29 Nov 2023 21:10:08 -0400 Message-ID: <1-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: SN6PR16CA0052.namprd16.prod.outlook.com (2603:10b6:805:ca::29) 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: 761ff352-228f-423a-dff5-08dbf1412b18 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)(4216001);DIR:OUT;SFP:1101; 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Call of_iommu_xlate() using the existing of_iommu_for_each_id(). Signed-off-by: Jason Gunthorpe --- drivers/iommu/of_iommu.c | 82 ++++++++++++++++++++++------------------ 1 file changed, 46 insertions(+), 36 deletions(-) diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index 164317bfb8a81f..3d4580f1fbb378 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -17,9 +17,9 @@ #include #include -static int of_iommu_xlate(struct device *dev, - struct of_phandle_args *iommu_spec) +static int of_iommu_xlate(struct of_phandle_args *iommu_spec, void *info) { + struct device *dev = info; const struct iommu_ops *ops; struct fwnode_handle *fwnode = &iommu_spec->np->fwnode; int ret; @@ -48,26 +48,27 @@ static int of_iommu_xlate(struct device *dev, return ret; } -static int of_iommu_configure_dev_id(struct device_node *master_np, - struct device *dev, - const u32 *id) +typedef int (*of_for_each_fn)(struct of_phandle_args *args, void *info); + +static int __for_each_map_id(struct device_node *master_np, u32 id, + of_for_each_fn fn, void *info) { struct of_phandle_args iommu_spec = { .args_count = 1 }; int err; - err = of_map_id(master_np, *id, "iommu-map", + err = of_map_id(master_np, id, "iommu-map", "iommu-map-mask", &iommu_spec.np, iommu_spec.args); if (err) return err; - err = of_iommu_xlate(dev, &iommu_spec); + err = fn(&iommu_spec, info); of_node_put(iommu_spec.np); return err; } -static int of_iommu_configure_dev(struct device_node *master_np, - struct device *dev) +static int __for_each_iommus(struct device_node *master_np, of_for_each_fn fn, + void *info) { struct of_phandle_args iommu_spec; int err = -ENODEV, idx = 0; @@ -75,7 +76,7 @@ static int of_iommu_configure_dev(struct device_node *master_np, while (!of_parse_phandle_with_args(master_np, "iommus", "#iommu-cells", idx, &iommu_spec)) { - err = of_iommu_xlate(dev, &iommu_spec); + err = fn(&iommu_spec, info); of_node_put(iommu_spec.np); idx++; if (err) @@ -86,23 +87,46 @@ static int of_iommu_configure_dev(struct device_node *master_np, } struct of_pci_iommu_alias_info { - struct device *dev; struct device_node *np; + of_for_each_fn fn; + void *info; }; -static int of_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data) +static int __for_each_map_pci(struct pci_dev *pdev, u16 alias, void *data) { - struct of_pci_iommu_alias_info *info = data; - u32 input_id = alias; + struct of_pci_iommu_alias_info *pci_info = data; - return of_iommu_configure_dev_id(info->np, info->dev, &input_id); + return __for_each_map_id(pci_info->np, alias, pci_info->fn, + pci_info->info); } -static int of_iommu_configure_device(struct device_node *master_np, - struct device *dev, const u32 *id) +static int of_iommu_for_each_id(struct device *dev, + struct device_node *master_np, const u32 *id, + of_for_each_fn fn, void *info) { - return (id) ? of_iommu_configure_dev_id(master_np, dev, id) : - of_iommu_configure_dev(master_np, dev); + /* + * We don't currently walk up the tree looking for a parent IOMMU. + * See the `Notes:' section of + * Documentation/devicetree/bindings/iommu/iommu.txt + */ + if (dev_is_pci(dev)) { + struct of_pci_iommu_alias_info pci_info = { + .np = master_np, + .fn = fn, + .info = info, + }; + + /* In PCI mode the ID comes from the RID */ + if (WARN_ON(id)) + return -EINVAL; + + return pci_for_each_dma_alias(to_pci_dev(dev), + __for_each_map_pci, &pci_info); + } + + if (id) + return __for_each_map_id(master_np, *id, fn, info); + return __for_each_iommus(master_np, fn, info); } /* @@ -133,25 +157,11 @@ int of_iommu_configure(struct device *dev, struct device_node *master_np, iommu_fwspec_free(dev); } - /* - * We don't currently walk up the tree looking for a parent IOMMU. - * See the `Notes:' section of - * Documentation/devicetree/bindings/iommu/iommu.txt - */ - if (dev_is_pci(dev)) { - struct of_pci_iommu_alias_info info = { - .dev = dev, - .np = master_np, - }; - + if (dev_is_pci(dev)) pci_request_acs(); - err = pci_for_each_dma_alias(to_pci_dev(dev), - of_pci_iommu_init, &info); - } else { - err = of_iommu_configure_device(master_np, dev, id); - } - mutex_unlock(&iommu_probe_device_lock); + err = of_iommu_for_each_id(dev, master_np, id, of_iommu_xlate, dev); + mutex_unlock(&iommu_probe_device_lock); if (err == -ENODEV || err == -EPROBE_DEFER) return err; if (err)