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authorJoerg Roedel <jroedel@suse.de>2017-08-10 00:17:28 +0200
committerJoerg Roedel <jroedel@suse.de>2017-08-17 16:31:34 +0200
commitc184ae83c8337d8ee0e5e9de9e7ce2fc652137aa (patch)
tree2aec5a505939d045dd41c4e013820096354ebcf8 /drivers/iommu
parent0b480e447006144ffcfaf178574b9a13344588a6 (diff)
iommu/tegra-gart: Add support for struct iommu_device
Add a struct iommu_device to each tegra-gart and register it with the iommu-core. Also link devices added to the driver to their respective hardware iommus. Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Tested-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/tegra-gart.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index 29bafc6e82ae..b62f790ad1ba 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -61,6 +61,8 @@ struct gart_device {
struct list_head client;
spinlock_t client_lock; /* for client list */
struct device *dev;
+
+ struct iommu_device iommu; /* IOMMU Core handle */
};
struct gart_domain {
@@ -342,12 +344,16 @@ static int gart_iommu_add_device(struct device *dev)
return PTR_ERR(group);
iommu_group_put(group);
+
+ iommu_device_link(&gart_handle->iommu, dev);
+
return 0;
}
static void gart_iommu_remove_device(struct device *dev)
{
iommu_group_remove_device(dev);
+ iommu_device_unlink(&gart_handle->iommu, dev);
}
static const struct iommu_ops gart_iommu_ops = {
@@ -397,6 +403,7 @@ static int tegra_gart_probe(struct platform_device *pdev)
struct resource *res, *res_remap;
void __iomem *gart_regs;
struct device *dev = &pdev->dev;
+ int ret;
if (gart_handle)
return -EIO;
@@ -423,6 +430,22 @@ static int tegra_gart_probe(struct platform_device *pdev)
return -ENXIO;
}
+ ret = iommu_device_sysfs_add(&gart->iommu, &pdev->dev, NULL,
+ dev_name(&pdev->dev));
+ if (ret) {
+ dev_err(dev, "Failed to register IOMMU in sysfs\n");
+ return ret;
+ }
+
+ iommu_device_set_ops(&gart->iommu, &gart_iommu_ops);
+
+ ret = iommu_device_register(&gart->iommu);
+ if (ret) {
+ dev_err(dev, "Failed to register IOMMU\n");
+ iommu_device_sysfs_remove(&gart->iommu);
+ return ret;
+ }
+
gart->dev = &pdev->dev;
spin_lock_init(&gart->pte_lock);
spin_lock_init(&gart->client_lock);
@@ -449,6 +472,9 @@ static int tegra_gart_remove(struct platform_device *pdev)
{
struct gart_device *gart = platform_get_drvdata(pdev);
+ iommu_device_unregister(&gart->iommu);
+ iommu_device_sysfs_remove(&gart->iommu);
+
writel(0, gart->regs + GART_CONFIG);
if (gart->savedata)
vfree(gart->savedata);