This adds of_xlate callback to arm-smmu driver. xlate callback
is called during device registration from DT for those master
devices attached to iommus using generic iommu bindings.
Signed-off-by: Sricharan R <sricha...@codeaurora.org>
---
drivers/iommu/arm-smmu.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 8c4eb43..2cf65ab 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -321,6 +321,7 @@ struct arm_smmu_device {
unsigned int *irqs;
struct list_head list;
+ struct device_node *node;
struct rb_root masters;
};
@@ -1434,6 +1435,38 @@ out_unlock:
return ret;
}
+static int arm_smmu_of_xlate(struct device *dev,
+ struct of_phandle_args *spec)
+{
+ struct arm_smmu_device *smmu;
+ struct arm_smmu_master *master;
+ int streamid;
+
+ spin_lock(&arm_smmu_devices_lock);
+ list_for_each_entry(smmu, &arm_smmu_devices, list) {
+ if (smmu->node == spec->np)
+ break;
+ }
+ spin_unlock(&arm_smmu_devices_lock);
+
+ if (!smmu || (smmu->node != spec->np))
+ return -ENODEV;
+
+ spec->np = dev->of_node;
+
+ master = find_smmu_master(smmu, spec->np);
+ if (!master) {
+ if (register_smmu_master(smmu, smmu->dev, spec))
+ return -ENODEV;
+ } else {
+ streamid = master->cfg.num_streamids;
+ master->cfg.streamids[streamid] = spec->args[0];
+ master->cfg.num_streamids++;
+ }
+
+ return 0;
+}
+
static struct iommu_ops arm_smmu_ops = {
.capable = arm_smmu_capable,
.domain_init = arm_smmu_domain_init,
@@ -1449,6 +1482,7 @@ static struct iommu_ops arm_smmu_ops = {
.domain_get_attr = arm_smmu_domain_get_attr,
.domain_set_attr = arm_smmu_domain_set_attr,
.pgsize_bitmap = -1UL, /* Restricted during device attach */
+ .of_xlate = arm_smmu_of_xlate,
};
static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
@@ -1782,6 +1816,8 @@ static int arm_smmu_device_dt_probe(struct
platform_device *pdev)
}
}
+ smmu->node = dev->of_node;
+
INIT_LIST_HEAD(&smmu->list);
spin_lock(&arm_smmu_devices_lock);
list_add(&smmu->list, &arm_smmu_devices);
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of
Code Aurora Forum, hosted by The Linux Foundation
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