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Tue, 16 May 2023 00:01:09 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::f7a7:a561:87e9:5fab]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::f7a7:a561:87e9:5fab%6]) with mapi id 15.20.6387.030; Tue, 16 May 2023 00:01:09 +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, Marek Szyprowski , 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 , Nicolin Chen , Niklas Schnelle , Steven Price , Thierry Reding Subject: [PATCH v2 04/25] iommu: Add IOMMU_DOMAIN_PLATFORM for S390 Date: Mon, 15 May 2023 21:00:37 -0300 Message-Id: <4-v2-8d1dc464eac9+10f-iommu_all_defdom_jgg@nvidia.com> In-Reply-To: <0-v2-8d1dc464eac9+10f-iommu_all_defdom_jgg@nvidia.com> References: X-ClientProxiedBy: MN2PR08CA0012.namprd08.prod.outlook.com (2603:10b6:208:239::17) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|PH7PR12MB6786:EE_ X-MS-Office365-Filtering-Correlation-Id: ef50d403-0254-42ba-0e21-08db55a0a2e0 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: ef50d403-0254-42ba-0e21-08db55a0a2e0 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 May 2023 00:01:02.0856 (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: FG1kMtQCpJZq8nk2Hn71dcdh0P8Y5DvgoDvsxLklT+XFdX2KdQp/At9oa/KaMh4r X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB6786 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@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) {