From: Nicolin Chen <nicoleotsuka@gmail.com>
To: thierry.reding@gmail.com, joro@8bytes.org, digetx@gmail.com
Cc: vdumpa@nvidia.com, jonathanh@nvidia.com,
linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v7 3/3] iommu/tegra-smmu: Add PCI support
Date: Fri, 9 Oct 2020 09:19:36 -0700 [thread overview]
Message-ID: <20201009161936.23122-4-nicoleotsuka@gmail.com> (raw)
In-Reply-To: <20201009161936.23122-1-nicoleotsuka@gmail.com>
This patch simply adds support for PCI devices.
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
---
Changelog
v6->v7
* Renamed goto labels, suggested by Thierry.
v5->v6
* Added Dmitry's Reviewed-by and Tested-by.
v4->v5
* Added Dmitry's Reviewed-by
v3->v4
* Dropped !iommu_present() check
* Added CONFIG_PCI check in the exit path
v2->v3
* Replaced ternary conditional operator with if-else in .device_group()
* Dropped change in tegra_smmu_remove()
v1->v2
* Added error-out labels in tegra_smmu_probe()
* Dropped pci_request_acs() since IOMMU core would call it.
drivers/iommu/tegra-smmu.c | 35 +++++++++++++++++++++++++----------
1 file changed, 25 insertions(+), 10 deletions(-)
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index be29f5977145..2941d6459076 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -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)
--
2.17.1
next prev parent reply other threads:[~2020-10-09 16:26 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-09 16:19 [PATCH v7 0/3] iommu/tegra-smmu: Add PCI support Nicolin Chen
2020-10-09 16:19 ` [PATCH v7 1/3] iommu/tegra-smmu: Use fwspec in tegra_smmu_(de)attach_dev Nicolin Chen
2020-10-09 16:19 ` [PATCH v7 2/3] iommu/tegra-smmu: Rework tegra_smmu_probe_device() Nicolin Chen
2020-10-09 16:19 ` Nicolin Chen [this message]
2020-10-14 17:42 ` [PATCH v7 3/3] iommu/tegra-smmu: Add PCI support Robin Murphy
2020-10-15 4:13 ` Nicolin Chen
2020-10-15 9:55 ` Robin Murphy
2020-10-16 3:53 ` Nicolin Chen
2020-10-16 14:10 ` Robin Murphy
2020-10-17 1:56 ` Nicolin Chen
2020-10-19 10:55 ` Robin Murphy
2020-11-07 8:38 ` [PATCH v7 0/3] " Nicolin Chen
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