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Wed, 23 Aug 2023 16:47:50 +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 16:47:50 +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 04/24] iommu: Add IOMMU_DOMAIN_PLATFORM for S390 Date: Wed, 23 Aug 2023 13:47:18 -0300 Message-ID: <4-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: CH0PR03CA0407.namprd03.prod.outlook.com (2603:10b6:610:11b::34) 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: 81f66e69-f005-4ecd-5165-08dba3f8aba4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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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: 81f66e69-f005-4ecd-5165-08dba3f8aba4 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Aug 2023 16:47:43.3686 (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: 5kaGt7oucMlt3HqmWb8a7BVhx05vWhm4DSAQhfEVf5dr82uZcFVQIu6frJY8CV6e X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6346 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The PLATFORM domain will be set as the default domain and attached as normal during probe. The driver will ignore the initial attach from a NULL domain to the PLATFORM domain. After this, the PLATFORM domain's attach_dev will be called whenever we detach from an UNMANAGED domain (eg for VFIO). This is the same time the original design would have called op->detach_dev(). This is temporary until the S390 dma-iommu.c conversion is merged. Tested-by: Heiko Stuebner Tested-by: Niklas Schnelle Reviewed-by: Lu Baolu Signed-off-by: Jason Gunthorpe Reviewed-by: Jerry Snitselaar --- drivers/iommu/s390-iommu.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c index fbf59a8db29b11..f0c867c57a5b9b 100644 --- a/drivers/iommu/s390-iommu.c +++ b/drivers/iommu/s390-iommu.c @@ -142,14 +142,31 @@ static int s390_iommu_attach_device(struct iommu_domain *domain, return 0; } -static void s390_iommu_set_platform_dma(struct device *dev) +/* + * Switch control over the IOMMU to S390's internal dma_api ops + */ +static int s390_iommu_platform_attach(struct iommu_domain *platform_domain, + struct device *dev) { struct zpci_dev *zdev = to_zpci_dev(dev); + if (!zdev->s390_domain) + return 0; + __s390_iommu_detach_device(zdev); zpci_dma_init_device(zdev); + return 0; } +static struct iommu_domain_ops s390_iommu_platform_ops = { + .attach_dev = s390_iommu_platform_attach, +}; + +static struct iommu_domain s390_iommu_platform_domain = { + .type = IOMMU_DOMAIN_PLATFORM, + .ops = &s390_iommu_platform_ops, +}; + static void s390_iommu_get_resv_regions(struct device *dev, struct list_head *list) { @@ -428,12 +445,12 @@ void zpci_destroy_iommu(struct zpci_dev *zdev) } static const struct iommu_ops s390_iommu_ops = { + .default_domain = &s390_iommu_platform_domain, .capable = s390_iommu_capable, .domain_alloc = s390_domain_alloc, .probe_device = s390_iommu_probe_device, .release_device = s390_iommu_release_device, .device_group = generic_device_group, - .set_platform_dma_ops = s390_iommu_set_platform_dma, .pgsize_bitmap = SZ_4K, .get_resv_regions = s390_iommu_get_resv_regions, .default_domain_ops = &(const struct iommu_domain_ops) {