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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: ad6a9106-6505-44db-e034-08dbb45f822e X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Sep 2023 13:44:10.5003 (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: VTPtZvcfrS7QjrKTnwZysvBOtM+m/FqRYb4N92Gpwwu2/kWti4y2TS2Vi6lJdcBf X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB7848 Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org All drivers are now using IDENTITY or PLATFORM domains for what this did, we can remove it now. It is no longer possible to attach to a NULL domain. Tested-by: Heiko Stuebner Tested-by: Niklas Schnelle Tested-by: Steven Price Tested-by: Marek Szyprowski Tested-by: Nicolin Chen Reviewed-by: Lu Baolu Reviewed-by: Jerry Snitselaar Signed-off-by: Jason Gunthorpe --- drivers/iommu/iommu.c | 30 +++++------------------------- include/linux/iommu.h | 4 ---- 2 files changed, 5 insertions(+), 29 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 1efd6351bbc2da..42a4585dd76da6 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2351,21 +2351,8 @@ static int __iommu_group_set_domain_internal(struct iommu_group *group, if (group->domain == new_domain) return 0; - /* - * New drivers should support default domains, so set_platform_dma() - * op will never be called. Otherwise the NULL domain represents some - * platform specific behavior. - */ - if (!new_domain) { - for_each_group_device(group, gdev) { - const struct iommu_ops *ops = dev_iommu_ops(gdev->dev); - - if (!WARN_ON(!ops->set_platform_dma_ops)) - ops->set_platform_dma_ops(gdev->dev); - } - group->domain = NULL; - return 0; - } + if (WARN_ON(!new_domain)) + return -EINVAL; /* * Changing the domain is done by calling attach_dev() on the new @@ -2401,19 +2388,15 @@ static int __iommu_group_set_domain_internal(struct iommu_group *group, */ last_gdev = gdev; for_each_group_device(group, gdev) { - const struct iommu_ops *ops = dev_iommu_ops(gdev->dev); - /* - * If set_platform_dma_ops is not present a NULL domain can - * happen only for first probe, in which case we leave - * group->domain as NULL and let release clean everything up. + * A NULL domain can happen only for first probe, in which case + * we leave group->domain as NULL and let release clean + * everything up. */ if (group->domain) WARN_ON(__iommu_device_set_domain( group, gdev->dev, group->domain, IOMMU_SET_DOMAIN_MUST_SUCCEED)); - else if (ops->set_platform_dma_ops) - ops->set_platform_dma_ops(gdev->dev); if (gdev == last_gdev) break; } @@ -3036,9 +3019,6 @@ static int iommu_setup_default_domain(struct iommu_group *group, /* * There are still some drivers which don't support default domains, so * we ignore the failure and leave group->default_domain NULL. - * - * We assume that the iommu driver starts up the device in - * 'set_platform_dma_ops' mode if it does not support default domains. */ dom = iommu_group_alloc_default_domain(group, req_type); if (!dom) { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index a05480be05fd08..511dfeea527215 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -243,9 +243,6 @@ struct iommu_iotlb_gather { * @release_device: Remove device from iommu driver handling * @probe_finalize: Do final setup work after the device is added to an IOMMU * group and attached to the groups domain - * @set_platform_dma_ops: Returning control back to the platform DMA ops. This op - * is to support old IOMMU drivers, new drivers should use - * default domains, and the common IOMMU DMA ops. * @device_group: find iommu group for a particular device * @get_resv_regions: Request list of reserved regions for a device * @of_xlate: add OF master IDs to iommu grouping @@ -280,7 +277,6 @@ struct iommu_ops { struct iommu_device *(*probe_device)(struct device *dev); void (*release_device)(struct device *dev); void (*probe_finalize)(struct device *dev); - void (*set_platform_dma_ops)(struct device *dev); struct iommu_group *(*device_group)(struct device *dev); /* Request/Free a list of reserved regions for a device */