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Mon, 1 May 2023 18:03:09 +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 15.20.6340.030; Mon, 1 May 2023 18:03:09 +0000 From: Jason Gunthorpe To: Andy Gross , Alim Akhtar , Bjorn Andersson , AngeloGioacchino Del Regno , Baolin Wang , Gerald Schaefer , Heiko Stuebner , iommu@lists.linux.dev, Jernej Skrabec , Jonathan Hunter , Joerg Roedel , 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, Marek Szyprowski , Matthias Brugger , Matthew Rosato , Orson Zhai , Rob Clark , Robin Murphy , Samuel Holland , Niklas Schnelle , Thierry Reding , Krishna Reddy , Chen-Yu Tsai , Will Deacon , Yong Wu , Chunyan Zhang Cc: Lu Baolu , Kevin Tian , Nicolin Chen , Steven Price Subject: [PATCH 16/20] iommu/sun50i: Add an IOMMU_IDENTITIY_DOMAIN Date: Mon, 1 May 2023 15:03:00 -0300 Message-Id: <16-v1-21cc72fcfb22+a7a-iommu_all_defdom_jgg@nvidia.com> In-Reply-To: <0-v1-21cc72fcfb22+a7a-iommu_all_defdom_jgg@nvidia.com> References: X-ClientProxiedBy: BLAPR03CA0097.namprd03.prod.outlook.com (2603:10b6:208:32a::12) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|IA1PR12MB6457:EE_ X-MS-Office365-Filtering-Correlation-Id: 2a4153af-b8d6-478f-7ebe-08db4a6e50d5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Signed-off-by: Jason Gunthorpe --- drivers/iommu/sun50i-iommu.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c index 74c5cb93e90027..15fd62d360778f 100644 --- a/drivers/iommu/sun50i-iommu.c +++ b/drivers/iommu/sun50i-iommu.c @@ -772,6 +772,26 @@ static void sun50i_iommu_detach_device(struct iommu_domain *domain, sun50i_iommu_detach_domain(iommu, sun50i_domain); } +static int sun50i_iommu_identity_attach(struct iommu_domain *identity_domain, + struct device *dev) +{ + struct sun50i_iommu *iommu = dev_iommu_priv_get(dev); + + if (iommu->domain == identity_domain || !iommu->domain) + return 0; + sun50i_iommu_detach_device(iommu->domain, dev); + return 0; +} + +static struct iommu_domain_ops sun50i_iommu_identity_ops = { + .attach_dev = sun50i_iommu_identity_attach, +}; + +static struct iommu_domain sun50i_iommu_identity_domain = { + .type = IOMMU_DOMAIN_IDENTITY, + .ops = &sun50i_iommu_identity_ops, +}; + static int sun50i_iommu_attach_device(struct iommu_domain *domain, struct device *dev) { @@ -827,6 +847,7 @@ static int sun50i_iommu_of_xlate(struct device *dev, } static const struct iommu_ops sun50i_iommu_ops = { + .identity_domain = &sun50i_iommu_identity_domain, .pgsize_bitmap = SZ_4K, .device_group = sun50i_iommu_device_group, .domain_alloc = sun50i_iommu_domain_alloc,