[1/2] iommu/tegra: Add support for struct iommu_device

Submitted by Joerg Roedel on Aug. 9, 2017, 10:29 p.m.

Details

Message ID 1502317752-8792-2-git-send-email-joro@8bytes.org
State New
Headers show

Commit Message

Joerg Roedel Aug. 9, 2017, 10:29 p.m.
From: Joerg Roedel <jroedel@suse.de>

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.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/tegra-smmu.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

Comments

Thierry Reding Aug. 18, 2017, 12:47 p.m.
On Thu, Aug 10, 2017 at 12:29:11AM +0200, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@suse.de>
> 
> 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.
> 
> Signed-off-by: Joerg Roedel <jroedel@suse.de>
> ---
>  drivers/iommu/tegra-smmu.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)

Acked-by: Thierry Reding <treding@nvidia.com>

Patch hide | download patch | download mbox

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index faa9c1e..2802e12 100644
--- 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);
 }