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Mon, 24 Jul 2023 17:22:17 +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 15.20.6609.032; Mon, 24 Jul 2023 17:22:17 +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 v5 04/25] iommu: Add IOMMU_DOMAIN_PLATFORM for S390 Date: Mon, 24 Jul 2023 14:21:54 -0300 Message-ID: <4-v5-d0a204c678c7+3d16a-iommu_all_defdom_jgg@nvidia.com> In-Reply-To: <0-v5-d0a204c678c7+3d16a-iommu_all_defdom_jgg@nvidia.com> References: X-ClientProxiedBy: BL0PR03CA0020.namprd03.prod.outlook.com (2603:10b6:208:2d::33) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|PH7PR12MB7353:EE_ X-MS-Office365-Filtering-Correlation-Id: cab6f812-c85a-4773-0a0f-08db8c6a8754 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: cab6f812-c85a-4773-0a0f-08db8c6a8754 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Jul 2023 17:22:17.0056 (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: HlaSZ9q2yFnsXl/M07JVJuTywqICGBNLO40bbKXCGHkhPx0CKslkpBQ6MjvORs7n X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7353 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 Signed-off-by: Jason Gunthorpe --- 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) {