From c9d9f2394c6a953585874a1a6cb2ecea853fdcf2 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Fri, 31 Mar 2017 16:26:03 +0200 Subject: [PATCH] iommu/rockchip: Make use of 'struct iommu_device' Register hardware IOMMUs seperatly with the iommu-core code and add a sysfs representation of the iommu topology. Tested-by: Heiko Stuebner Signed-off-by: Joerg Roedel --- drivers/iommu/rockchip-iommu.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 9afcbf79f0b0..36d089025f4c 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -90,6 +90,7 @@ struct rk_iommu { void __iomem **bases; int num_mmu; int irq; + struct iommu_device iommu; struct list_head node; /* entry in rk_iommu_domain.iommus */ struct iommu_domain *domain; /* domain to which iommu is attached */ }; @@ -1032,6 +1033,7 @@ static int rk_iommu_group_set_iommudata(struct iommu_group *group, static int rk_iommu_add_device(struct device *dev) { struct iommu_group *group; + struct rk_iommu *iommu; int ret; if (!rk_iommu_is_dev_iommu_master(dev)) @@ -1054,6 +1056,10 @@ static int rk_iommu_add_device(struct device *dev) if (ret) goto err_remove_device; + iommu = rk_iommu_from_dev(dev); + if (iommu) + iommu_device_link(&iommu->iommu, dev); + iommu_group_put(group); return 0; @@ -1067,9 +1073,15 @@ err_put_group: static void rk_iommu_remove_device(struct device *dev) { + struct rk_iommu *iommu; + if (!rk_iommu_is_dev_iommu_master(dev)) return; + iommu = rk_iommu_from_dev(dev); + if (iommu) + iommu_device_unlink(&iommu->iommu, dev); + iommu_group_remove_device(dev); } @@ -1117,7 +1129,7 @@ static int rk_iommu_probe(struct platform_device *pdev) struct rk_iommu *iommu; struct resource *res; int num_res = pdev->num_resources; - int i; + int err, i; iommu = devm_kzalloc(dev, sizeof(*iommu), GFP_KERNEL); if (!iommu) @@ -1150,11 +1162,25 @@ static int rk_iommu_probe(struct platform_device *pdev) return -ENXIO; } - return 0; + err = iommu_device_sysfs_add(&iommu->iommu, dev, NULL, dev_name(dev)); + if (err) + return err; + + iommu_device_set_ops(&iommu->iommu, &rk_iommu_ops); + err = iommu_device_register(&iommu->iommu); + + return err; } static int rk_iommu_remove(struct platform_device *pdev) { + struct rk_iommu *iommu = platform_get_drvdata(pdev); + + if (iommu) { + iommu_device_sysfs_remove(&iommu->iommu); + iommu_device_unregister(&iommu->iommu); + } + return 0; }