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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 24/30] iommu/virtio: Move to iommu_fw_alloc_per_device_ids() Date: Wed, 29 Nov 2023 21:10:31 -0400 Message-ID: <24-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: SN7P222CA0017.NAMP222.PROD.OUTLOOK.COM (2603:10b6:806:124::15) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|DS0PR12MB7607:EE_ X-MS-Office365-Filtering-Correlation-Id: f184cbfa-52b3-4d89-5ed6-08dbf1412a6b 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)(396003)(39860400002)(346002)(136003)(366004)(376002)(230922051799003)(186009)(451199024)(64100799003)(1800799012)(38100700002)(202311291699003)(83380400001)(1191002)(5660300002)(110136005)(2906002)(86362001)(4326008)(8676002)(8936002)(66556008)(7366002)(7406005)(7416002)(66476007)(66946007)(6486002)(478600001)(6666004)(316002)(36756003)(6506007)(41300700001)(6512007)(921008)(26005)(2616005);DIR:OUT;SFP:1101; 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It has a combined ACPI (via the VIOT table) and OF probe path, add iommu_viot_get_single_iommu() to respresent this. It already has a per-instance structure, extend it with the ids[] array and use iommu_fw_alloc_per_device_ids() to populate it. Convert the rest of the funcs from calling dev_iommu_fwspec_get() to using he per-device data and remove all use of fwspec. Signed-off-by: Jason Gunthorpe --- drivers/iommu/virtio-iommu.c | 67 +++++++++++++----------------------- 1 file changed, 23 insertions(+), 44 deletions(-) diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index b1a7b14a6c7a2f..767919bf848999 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -77,6 +77,8 @@ struct viommu_endpoint { struct viommu_dev *viommu; struct viommu_domain *vdomain; struct list_head resv_regions; + unsigned int num_ids; + u32 ids[] __counted_by(num_ids); }; struct viommu_request { @@ -510,19 +512,16 @@ static int viommu_add_resv_mem(struct viommu_endpoint *vdev, return 0; } -static int viommu_probe_endpoint(struct viommu_dev *viommu, struct device *dev) +static int viommu_probe_endpoint(struct viommu_endpoint *vdev) { int ret; u16 type, len; size_t cur = 0; size_t probe_len; + struct device *dev = vdev->dev; struct virtio_iommu_req_probe *probe; struct virtio_iommu_probe_property *prop; - struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); - struct viommu_endpoint *vdev = dev_iommu_priv_get(dev); - - if (!fwspec->num_ids) - return -EINVAL; + struct viommu_dev *viommu = vdev->viommu; probe_len = sizeof(*probe) + viommu->probe_size + sizeof(struct virtio_iommu_req_tail); @@ -535,7 +534,7 @@ static int viommu_probe_endpoint(struct viommu_dev *viommu, struct device *dev) * For now, assume that properties of an endpoint that outputs multiple * IDs are consistent. Only probe the first one. */ - probe->endpoint = cpu_to_le32(fwspec->ids[0]); + probe->endpoint = cpu_to_le32(vdev->ids[0]); ret = viommu_send_req_sync(viommu, probe, probe_len); if (ret) @@ -721,7 +720,6 @@ static int viommu_attach_dev(struct iommu_domain *domain, struct device *dev) int i; int ret = 0; struct virtio_iommu_req_attach req; - struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct viommu_endpoint *vdev = dev_iommu_priv_get(dev); struct viommu_domain *vdomain = to_viommu_domain(domain); @@ -763,8 +761,8 @@ static int viommu_attach_dev(struct iommu_domain *domain, struct device *dev) if (vdomain->bypass) req.flags |= cpu_to_le32(VIRTIO_IOMMU_ATTACH_F_BYPASS); - for (i = 0; i < fwspec->num_ids; i++) { - req.endpoint = cpu_to_le32(fwspec->ids[i]); + for (i = 0; i < vdev->num_ids; i++) { + req.endpoint = cpu_to_le32(vdev->ids[i]); ret = viommu_send_req_sync(vdomain->viommu, &req, sizeof(req)); if (ret) @@ -792,7 +790,6 @@ static void viommu_detach_dev(struct viommu_endpoint *vdev) int i; struct virtio_iommu_req_detach req; struct viommu_domain *vdomain = vdev->vdomain; - struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(vdev->dev); if (!vdomain) return; @@ -802,8 +799,8 @@ static void viommu_detach_dev(struct viommu_endpoint *vdev) .domain = cpu_to_le32(vdomain->id), }; - for (i = 0; i < fwspec->num_ids; i++) { - req.endpoint = cpu_to_le32(fwspec->ids[i]); + for (i = 0; i < vdev->num_ids; i++) { + req.endpoint = cpu_to_le32(vdev->ids[i]); WARN_ON(viommu_send_req_sync(vdev->viommu, &req, sizeof(req))); } vdomain->nr_endpoints--; @@ -974,34 +971,21 @@ static void viommu_get_resv_regions(struct device *dev, struct list_head *head) static struct iommu_ops viommu_ops; static struct virtio_driver virtio_iommu_drv; -static int viommu_match_node(struct device *dev, const void *data) -{ - return device_match_fwnode(dev->parent, data); -} - -static struct viommu_dev *viommu_get_by_fwnode(struct fwnode_handle *fwnode) -{ - struct device *dev = driver_find_device(&virtio_iommu_drv.driver, NULL, - fwnode, viommu_match_node); - put_device(dev); - - return dev ? dev_to_virtio(dev)->priv : NULL; -} - -static struct iommu_device *viommu_probe_device(struct device *dev) +static struct iommu_device *viommu_probe_device(struct iommu_probe_info *pinf) { int ret; + struct viommu_dev *viommu; struct viommu_endpoint *vdev; - struct viommu_dev *viommu = NULL; - struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + struct device *dev = pinf->dev; - viommu = viommu_get_by_fwnode(fwspec->iommu_fwnode); - if (!viommu) - return ERR_PTR(-ENODEV); + viommu = iommu_viot_get_single_iommu(pinf, &viommu_ops, + struct viommu_dev, iommu); + if (IS_ERR(viommu)) + return ERR_CAST(viommu); - vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); - if (!vdev) - return ERR_PTR(-ENOMEM); + vdev = iommu_fw_alloc_per_device_ids(pinf, vdev); + if (IS_ERR(vdev)) + return ERR_CAST(vdev); vdev->dev = dev; vdev->viommu = viommu; @@ -1010,7 +994,7 @@ static struct iommu_device *viommu_probe_device(struct device *dev) if (viommu->probe_size) { /* Get additional information for this endpoint */ - ret = viommu_probe_endpoint(viommu, dev); + ret = viommu_probe_endpoint(vdev); if (ret) goto err_free_dev; } @@ -1050,11 +1034,6 @@ static struct iommu_group *viommu_device_group(struct device *dev) return generic_device_group(dev); } -static int viommu_of_xlate(struct device *dev, struct of_phandle_args *args) -{ - return iommu_fwspec_add_ids(dev, args->args, 1); -} - static bool viommu_capable(struct device *dev, enum iommu_cap cap) { switch (cap) { @@ -1070,12 +1049,12 @@ static bool viommu_capable(struct device *dev, enum iommu_cap cap) static struct iommu_ops viommu_ops = { .capable = viommu_capable, .domain_alloc = viommu_domain_alloc, - .probe_device = viommu_probe_device, + .probe_device_pinf = viommu_probe_device, .probe_finalize = viommu_probe_finalize, .release_device = viommu_release_device, .device_group = viommu_device_group, .get_resv_regions = viommu_get_resv_regions, - .of_xlate = viommu_of_xlate, + .of_xlate = iommu_dummy_of_xlate, .owner = THIS_MODULE, .default_domain_ops = &(const struct iommu_domain_ops) { .attach_dev = viommu_attach_dev,