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Wed, 23 Aug 2023 16:47:43 +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 15.20.6699.020; Wed, 23 Aug 2023 16:47:43 +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 v7 15/24] iommu: Remove ops->set_platform_dma_ops() Date: Wed, 23 Aug 2023 13:47:29 -0300 Message-ID: <15-v7-de04a3217c48+15055-iommu_all_defdom_jgg@nvidia.com> In-Reply-To: <0-v7-de04a3217c48+15055-iommu_all_defdom_jgg@nvidia.com> References: X-ClientProxiedBy: CH0PR03CA0341.namprd03.prod.outlook.com (2603:10b6:610:11a::18) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|CY5PR12MB6346:EE_ X-MS-Office365-Filtering-Correlation-Id: d5912b83-c6d4-45ab-0c8b-08dba3f8aa6c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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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: d5912b83-c6d4-45ab-0c8b-08dba3f8aa6c X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Aug 2023 16:47:41.3114 (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: /+55OL81S0Pa11KurYkC0edsuCpNxj9UemnDjt5mu5PkBtHC46edDJSiLnnleaLJ X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6346 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org All drivers are now using IDENTITY or PLATFORM domains for what this did, we can remove it now. It is no longer possible to attach to a NULL domain. Tested-by: Heiko Stuebner Tested-by: Niklas Schnelle Tested-by: Steven Price Tested-by: Marek Szyprowski Tested-by: Nicolin Chen Reviewed-by: Lu Baolu Signed-off-by: Jason Gunthorpe Reviewed-by: Jerry Snitselaar --- drivers/iommu/iommu.c | 30 +++++------------------------- include/linux/iommu.h | 4 ---- 2 files changed, 5 insertions(+), 29 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 5fb25bcbc42f76..a3b016543fad00 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2351,21 +2351,8 @@ static int __iommu_group_set_domain_internal(struct iommu_group *group, if (group->domain == new_domain) return 0; - /* - * New drivers should support default domains, so set_platform_dma() - * op will never be called. Otherwise the NULL domain represents some - * platform specific behavior. - */ - if (!new_domain) { - for_each_group_device(group, gdev) { - const struct iommu_ops *ops = dev_iommu_ops(gdev->dev); - - if (!WARN_ON(!ops->set_platform_dma_ops)) - ops->set_platform_dma_ops(gdev->dev); - } - group->domain = NULL; - return 0; - } + if (WARN_ON(!new_domain)) + return -EINVAL; /* * Changing the domain is done by calling attach_dev() on the new @@ -2401,19 +2388,15 @@ static int __iommu_group_set_domain_internal(struct iommu_group *group, */ last_gdev = gdev; for_each_group_device(group, gdev) { - const struct iommu_ops *ops = dev_iommu_ops(gdev->dev); - /* - * If set_platform_dma_ops is not present a NULL domain can - * happen only for first probe, in which case we leave - * group->domain as NULL and let release clean everything up. + * A NULL domain can happen only for first probe, in which case + * we leave group->domain as NULL and let release clean + * everything up. */ if (group->domain) WARN_ON(__iommu_device_set_domain( group, gdev->dev, group->domain, IOMMU_SET_DOMAIN_MUST_SUCCEED)); - else if (ops->set_platform_dma_ops) - ops->set_platform_dma_ops(gdev->dev); if (gdev == last_gdev) break; } @@ -3036,9 +3019,6 @@ static int iommu_setup_default_domain(struct iommu_group *group, /* * There are still some drivers which don't support default domains, so * we ignore the failure and leave group->default_domain NULL. - * - * We assume that the iommu driver starts up the device in - * 'set_platform_dma_ops' mode if it does not support default domains. */ dom = iommu_group_alloc_default_domain(group, req_type); if (!dom) { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 48a18b6e07abff..c3d2e79076ffab 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -243,9 +243,6 @@ struct iommu_iotlb_gather { * @release_device: Remove device from iommu driver handling * @probe_finalize: Do final setup work after the device is added to an IOMMU * group and attached to the groups domain - * @set_platform_dma_ops: Returning control back to the platform DMA ops. This op - * is to support old IOMMU drivers, new drivers should use - * default domains, and the common IOMMU DMA ops. * @device_group: find iommu group for a particular device * @get_resv_regions: Request list of reserved regions for a device * @of_xlate: add OF master IDs to iommu grouping @@ -278,7 +275,6 @@ struct iommu_ops { struct iommu_device *(*probe_device)(struct device *dev); void (*release_device)(struct device *dev); void (*probe_finalize)(struct device *dev); - void (*set_platform_dma_ops)(struct device *dev); struct iommu_group *(*device_group)(struct device *dev); /* Request/Free a list of reserved regions for a device */