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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>
This commit is contained in:
Joerg Roedel 2017-08-10 00:17:28 +02:00
parent 0b480e4470
commit c184ae83c8
1 changed files with 26 additions and 0 deletions
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26
drivers/iommu/tegra-gart.c
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@ -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);