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Wed, 23 Aug 2023 16:47:49 +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 16:47:49 +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 13/24] iommu/omap: Implement an IDENTITY domain Date: Wed, 23 Aug 2023 13:47:27 -0300 Message-ID: <13-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: CH0PR03CA0393.namprd03.prod.outlook.com (2603:10b6:610:11b::21) 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: f2b64f42-3da2-45c0-6634-08dba3f8ab98 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: f2b64f42-3da2-45c0-6634-08dba3f8ab98 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Aug 2023 16:47:43.2257 (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: /ENBC/d1FpZw0JjSvUolFd8Fc+obA4aKed5PT3EJHS2vuyGzabTkkpJ+J8YgxVnU X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6346 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org What omap does during omap_iommu_set_platform_dma() is actually putting the iommu into identity mode. Move to the new core support for ARM_DMA_USE_IOMMU by defining ops->identity_domain. This driver does not support IOMMU_DOMAIN_DMA, however it cannot be compiled on ARM64 either. Most likely it is fine to support dma-iommu.c Reviewed-by: Lu Baolu Signed-off-by: Jason Gunthorpe Reviewed-by: Jerry Snitselaar --- drivers/iommu/omap-iommu.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index 537e402f9bba97..34340ef15241bc 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -1555,16 +1555,31 @@ static void _omap_iommu_detach_dev(struct omap_iommu_domain *omap_domain, omap_domain->dev = NULL; } -static void omap_iommu_set_platform_dma(struct device *dev) +static int omap_iommu_identity_attach(struct iommu_domain *identity_domain, + struct device *dev) { struct iommu_domain *domain = iommu_get_domain_for_dev(dev); - struct omap_iommu_domain *omap_domain = to_omap_domain(domain); + struct omap_iommu_domain *omap_domain; + if (domain == identity_domain || !domain) + return 0; + + omap_domain = to_omap_domain(domain); spin_lock(&omap_domain->lock); _omap_iommu_detach_dev(omap_domain, dev); spin_unlock(&omap_domain->lock); + return 0; } +static struct iommu_domain_ops omap_iommu_identity_ops = { + .attach_dev = omap_iommu_identity_attach, +}; + +static struct iommu_domain omap_iommu_identity_domain = { + .type = IOMMU_DOMAIN_IDENTITY, + .ops = &omap_iommu_identity_ops, +}; + static struct iommu_domain *omap_iommu_domain_alloc(unsigned type) { struct omap_iommu_domain *omap_domain; @@ -1732,11 +1747,11 @@ static struct iommu_group *omap_iommu_device_group(struct device *dev) } static const struct iommu_ops omap_iommu_ops = { + .identity_domain = &omap_iommu_identity_domain, .domain_alloc = omap_iommu_domain_alloc, .probe_device = omap_iommu_probe_device, .release_device = omap_iommu_release_device, .device_group = omap_iommu_device_group, - .set_platform_dma_ops = omap_iommu_set_platform_dma, .pgsize_bitmap = OMAP_IOMMU_PGSIZES, .default_domain_ops = &(const struct iommu_domain_ops) { .attach_dev = omap_iommu_attach_dev,