From: Thierry Reding <tred...@nvidia.com>
Implement a ->probe_finalize() callback that can be used by vendor
implementations to perform extra programming necessary after devices
have been attached to the SMMU.
Signed-off-by: Thierry Reding <tred...@nvidia.com>
---
Changes in v2:
-remove unnecessarily paranoid check
---
drivers/iommu/arm/arm-smmu/arm-smmu.c | 13 +++++++++++++
drivers/iommu/arm/arm-smmu/arm-smmu.h | 1 +
2 files changed, 14 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c
b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index 6f72c4d208ca..d20ce4d57df2 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -1450,6 +1450,18 @@ static void arm_smmu_release_device(struct device *dev)
iommu_fwspec_free(dev);
}
+static void arm_smmu_probe_finalize(struct device *dev)
+{
+ struct arm_smmu_master_cfg *cfg;
+ struct arm_smmu_device *smmu;
+
+ cfg = dev_iommu_priv_get(dev);
+ smmu = cfg->smmu;
+
+ if (smmu->impl->probe_finalize)
+ smmu->impl->probe_finalize(smmu, dev);
+}
+
static struct iommu_group *arm_smmu_device_group(struct device *dev)
{
struct arm_smmu_master_cfg *cfg = dev_iommu_priv_get(dev);
@@ -1569,6 +1581,7 @@ static struct iommu_ops arm_smmu_ops = {
.iova_to_phys = arm_smmu_iova_to_phys,
.probe_device = arm_smmu_probe_device,
.release_device = arm_smmu_release_device,
+ .probe_finalize = arm_smmu_probe_finalize,
.device_group = arm_smmu_device_group,
.enable_nesting = arm_smmu_enable_nesting,
.set_pgtable_quirks = arm_smmu_set_pgtable_quirks,
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h
b/drivers/iommu/arm/arm-smmu/arm-smmu.h
index c31a59d35c64..147c95e7c59c 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.h
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h
@@ -439,6 +439,7 @@ struct arm_smmu_impl {
struct device *dev, int start);
void (*write_s2cr)(struct arm_smmu_device *smmu, int idx);
void (*write_sctlr)(struct arm_smmu_device *smmu, int idx, u32 reg);
+ void (*probe_finalize)(struct arm_smmu_device *smmu, struct device
*dev);
};
#define INVALID_SMENDX -1
--
2.30.2
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