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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: 6d9ab37f-3289-4f52-cdd6-08db69239b4a X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Jun 2023 19:56:25.4580 (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: slcVzNebVuqpsWNJiKmdYmYWN0PI/dpYl9Gy1uY2KL+UJhS5IVMn1VzIwcB9tlfe X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB5785 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230609_125648_797823_2DEAB8FF X-CRM114-Status: GOOD ( 15.21 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org What exynos calls exynos_iommu_detach_device is actually putting the iommu into identity mode. Move to the new core support for ARM_DMA_USE_IOMMU by defining ops->identity_domain. Tested-by: Marek Szyprowski Acked-by: Marek Szyprowski Signed-off-by: Jason Gunthorpe --- drivers/iommu/exynos-iommu.c | 66 +++++++++++++++++------------------- 1 file changed, 32 insertions(+), 34 deletions(-) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index c275fe71c4db32..5e12b85dfe8705 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -24,6 +24,7 @@ typedef u32 sysmmu_iova_t; typedef u32 sysmmu_pte_t; +static struct iommu_domain exynos_identity_domain; /* We do not consider super section mapping (16MB) */ #define SECT_ORDER 20 @@ -829,7 +830,7 @@ static int __maybe_unused exynos_sysmmu_suspend(struct device *dev) struct exynos_iommu_owner *owner = dev_iommu_priv_get(master); mutex_lock(&owner->rpm_lock); - if (data->domain) { + if (&data->domain->domain != &exynos_identity_domain) { dev_dbg(data->sysmmu, "saving state\n"); __sysmmu_disable(data); } @@ -847,7 +848,7 @@ static int __maybe_unused exynos_sysmmu_resume(struct device *dev) struct exynos_iommu_owner *owner = dev_iommu_priv_get(master); mutex_lock(&owner->rpm_lock); - if (data->domain) { + if (&data->domain->domain != &exynos_identity_domain) { dev_dbg(data->sysmmu, "restoring state\n"); __sysmmu_enable(data); } @@ -980,17 +981,20 @@ static void exynos_iommu_domain_free(struct iommu_domain *iommu_domain) kfree(domain); } -static void exynos_iommu_detach_device(struct iommu_domain *iommu_domain, - struct device *dev) +static int exynos_iommu_identity_attach(struct iommu_domain *identity_domain, + struct device *dev) { - struct exynos_iommu_domain *domain = to_exynos_domain(iommu_domain); struct exynos_iommu_owner *owner = dev_iommu_priv_get(dev); - phys_addr_t pagetable = virt_to_phys(domain->pgtable); + struct exynos_iommu_domain *domain; + phys_addr_t pagetable; struct sysmmu_drvdata *data, *next; unsigned long flags; - if (!has_sysmmu(dev) || owner->domain != iommu_domain) - return; + if (owner->domain == identity_domain) + return 0; + + domain = to_exynos_domain(owner->domain); + pagetable = virt_to_phys(domain->pgtable); mutex_lock(&owner->rpm_lock); @@ -1009,15 +1013,25 @@ static void exynos_iommu_detach_device(struct iommu_domain *iommu_domain, list_del_init(&data->domain_node); spin_unlock(&data->lock); } - owner->domain = NULL; + owner->domain = identity_domain; spin_unlock_irqrestore(&domain->lock, flags); mutex_unlock(&owner->rpm_lock); - dev_dbg(dev, "%s: Detached IOMMU with pgtable %pa\n", __func__, - &pagetable); + dev_dbg(dev, "%s: Restored IOMMU to IDENTITY from pgtable %pa\n", + __func__, &pagetable); + return 0; } +static struct iommu_domain_ops exynos_identity_ops = { + .attach_dev = exynos_iommu_identity_attach, +}; + +static struct iommu_domain exynos_identity_domain = { + .type = IOMMU_DOMAIN_IDENTITY, + .ops = &exynos_identity_ops, +}; + static int exynos_iommu_attach_device(struct iommu_domain *iommu_domain, struct device *dev) { @@ -1026,12 +1040,11 @@ static int exynos_iommu_attach_device(struct iommu_domain *iommu_domain, struct sysmmu_drvdata *data; phys_addr_t pagetable = virt_to_phys(domain->pgtable); unsigned long flags; + int err; - if (!has_sysmmu(dev)) - return -ENODEV; - - if (owner->domain) - exynos_iommu_detach_device(owner->domain, dev); + err = exynos_iommu_identity_attach(&exynos_identity_domain, dev); + if (err) + return err; mutex_lock(&owner->rpm_lock); @@ -1407,26 +1420,12 @@ static struct iommu_device *exynos_iommu_probe_device(struct device *dev) return &data->iommu; } -static void exynos_iommu_set_platform_dma(struct device *dev) -{ - struct exynos_iommu_owner *owner = dev_iommu_priv_get(dev); - - if (owner->domain) { - struct iommu_group *group = iommu_group_get(dev); - - if (group) { - exynos_iommu_detach_device(owner->domain, dev); - iommu_group_put(group); - } - } -} - static void exynos_iommu_release_device(struct device *dev) { struct exynos_iommu_owner *owner = dev_iommu_priv_get(dev); struct sysmmu_drvdata *data; - exynos_iommu_set_platform_dma(dev); + WARN_ON(exynos_iommu_identity_attach(&exynos_identity_domain, dev)); list_for_each_entry(data, &owner->controllers, owner_node) device_link_del(data->link); @@ -1457,6 +1456,7 @@ static int exynos_iommu_of_xlate(struct device *dev, INIT_LIST_HEAD(&owner->controllers); mutex_init(&owner->rpm_lock); + owner->domain = &exynos_identity_domain; dev_iommu_priv_set(dev, owner); } @@ -1471,11 +1471,9 @@ static int exynos_iommu_of_xlate(struct device *dev, } static const struct iommu_ops exynos_iommu_ops = { + .identity_domain = &exynos_identity_domain, .domain_alloc = exynos_iommu_domain_alloc, .device_group = generic_device_group, -#ifdef CONFIG_ARM - .set_platform_dma_ops = exynos_iommu_set_platform_dma, -#endif .probe_device = exynos_iommu_probe_device, .release_device = exynos_iommu_release_device, .pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE,