iommu/tegra: Add support for struct iommu_device

Add a struct iommu_device to each tegra-smmu and register it
with the iommu-core. Also link devices added to the driver
to their respective hardware iommus.

Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index faa9c1e..2802e12 100644 (file)
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -36,6 +36,8 @@ struct tegra_smmu {
        struct list_head list;
 
        struct dentry *debugfs;
+
+       struct iommu_device iommu;      /* IOMMU Core code handle */
 };
 
 struct tegra_smmu_as {
@@ -720,6 +722,9 @@ static int tegra_smmu_add_device(struct device *dev)
                         * first match.
                         */
                        dev->archdata.iommu = smmu;
+
+                       iommu_device_link(&smmu->iommu, dev);
+
                        break;
                }
 
@@ -737,6 +742,11 @@ static int tegra_smmu_add_device(struct device *dev)
 
 static void tegra_smmu_remove_device(struct device *dev)
 {
+       struct tegra_smmu *smmu = dev->archdata.iommu;
+
+       if (smmu)
+               iommu_device_unlink(&smmu->iommu, dev);
+
        dev->archdata.iommu = NULL;
        iommu_group_remove_device(dev);
 }
@@ -943,6 +953,18 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev,
        if (err < 0)
                return ERR_PTR(err);
 
+       err = iommu_device_sysfs_add(&smmu->iommu, dev, NULL, dev_name(dev));
+       if (err)
+               return ERR_PTR(err);
+
+       iommu_device_set_ops(&smmu->iommu, &tegra_smmu_ops);
+
+       err = iommu_device_register(&smmu->iommu);
+       if (err) {
+               iommu_device_sysfs_remove(&smmu->iommu);
+               return ERR_PTR(err);
+       }
+
        if (IS_ENABLED(CONFIG_DEBUG_FS))
                tegra_smmu_debugfs_init(smmu);
 
@@ -951,6 +973,9 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev,
 
 void tegra_smmu_remove(struct tegra_smmu *smmu)
 {
+       iommu_device_unregister(&smmu->iommu);
+       iommu_device_sysfs_remove(&smmu->iommu);
+
        if (IS_ENABLED(CONFIG_DEBUG_FS))
                tegra_smmu_debugfs_exit(smmu);
 }