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iommu/tegra-smmu: Add PCI support 

This patch simply adds support for PCI devices.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20201125101013.14953-6-nicoleotsuka@gmail.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Nicolin Chen 2020-11-25 02:10:13 -08:00 committed by Will Deacon
parent 25938c73cd
commit 541f29bb06
1 changed files with 25 additions and 10 deletions
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35
drivers/iommu/tegra-smmu.c
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@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
@ -865,7 +866,11 @@ static struct iommu_group *tegra_smmu_device_group(struct device *dev)
group->smmu = smmu;
group->soc = soc;
group->group = iommu_group_alloc();
if (dev_is_pci(dev))
group->group = pci_device_group(dev);
else
group->group = generic_device_group(dev);
if (IS_ERR(group->group)) {
devm_kfree(smmu->dev, group);
mutex_unlock(&smmu->lock);
@ -1075,22 +1080,32 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev,
iommu_device_set_fwnode(&smmu->iommu, dev->fwnode);
err = iommu_device_register(&smmu->iommu);
if (err) {
iommu_device_sysfs_remove(&smmu->iommu);
return ERR_PTR(err);
}
if (err)
goto remove_sysfs;
err = bus_set_iommu(&platform_bus_type, &tegra_smmu_ops);
if (err < 0) {
iommu_device_unregister(&smmu->iommu);
iommu_device_sysfs_remove(&smmu->iommu);
return ERR_PTR(err);
}
if (err < 0)
goto unregister;
#ifdef CONFIG_PCI
err = bus_set_iommu(&pci_bus_type, &tegra_smmu_ops);
if (err < 0)
goto unset_platform_bus;
#endif
if (IS_ENABLED(CONFIG_DEBUG_FS))
tegra_smmu_debugfs_init(smmu);
return smmu;
unset_platform_bus: __maybe_unused;
bus_set_iommu(&platform_bus_type, NULL);
unregister:
iommu_device_unregister(&smmu->iommu);
remove_sysfs:
iommu_device_sysfs_remove(&smmu->iommu);
return ERR_PTR(err);
}
void tegra_smmu_remove(struct tegra_smmu *smmu)