summaryrefslogtreecommitdiff
path: root/drivers/iommu/tegra-gart.c
diff options
context:
space:
mode:
authorDmitry Osipenko <digetx@gmail.com>2018-12-12 23:38:46 +0300
committerJoerg Roedel <jroedel@suse.de>2019-01-16 13:54:09 +0100
commit4b6f0ea384f4a39c07fad556a9b4d619759de6c5 (patch)
tree5f4b35287c89090252349d270d7c8a7f30135d6c /drivers/iommu/tegra-gart.c
parentae95c46dbed56af0e1d106865801bf06e1762c2c (diff)
iommu/tegra: gart: Ignore devices without IOMMU phandle in DT
GART can't handle all devices, hence ignore devices that aren't related to GART. IOMMU phandle must be explicitly assign to devices in the device tree. Signed-off-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/tegra-gart.c')
-rw-r--r--drivers/iommu/tegra-gart.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index 1cd470b2beea..37a76388ff7e 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -345,8 +345,12 @@ static bool gart_iommu_capable(enum iommu_cap cap)
static int gart_iommu_add_device(struct device *dev)
{
- struct iommu_group *group = iommu_group_get_for_dev(dev);
+ struct iommu_group *group;
+ if (!dev->iommu_fwspec)
+ return -ENODEV;
+
+ group = iommu_group_get_for_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
@@ -363,6 +367,12 @@ static void gart_iommu_remove_device(struct device *dev)
iommu_device_unlink(&gart_handle->iommu, dev);
}
+static int gart_iommu_of_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ return 0;
+}
+
static const struct iommu_ops gart_iommu_ops = {
.capable = gart_iommu_capable,
.domain_alloc = gart_iommu_domain_alloc,
@@ -376,6 +386,7 @@ static const struct iommu_ops gart_iommu_ops = {
.unmap = gart_iommu_unmap,
.iova_to_phys = gart_iommu_iova_to_phys,
.pgsize_bitmap = GART_IOMMU_PGSIZES,
+ .of_xlate = gart_iommu_of_xlate,
};
static int tegra_gart_suspend(struct device *dev)
@@ -441,6 +452,7 @@ static int tegra_gart_probe(struct platform_device *pdev)
}
iommu_device_set_ops(&gart->iommu, &gart_iommu_ops);
+ iommu_device_set_fwnode(&gart->iommu, dev->fwnode);
ret = iommu_device_register(&gart->iommu);
if (ret) {