Add a new operation to allow platform implementations to inherit any
stream mappings from the boot loader.
Signed-off-by: Bjorn Andersson <bjorn.anders...@linaro.org>
---
Changes since v2:
- New patch/interface
drivers/iommu/arm/arm-smmu/arm-smmu.c | 11 ++++++-----
drivers/iommu/arm/arm-smmu/arm-smmu.h | 6 ++++++
2 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c
b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index eb5c6ca5c138..4c4d302cd747 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -85,11 +85,6 @@ static inline void arm_smmu_rpm_put(struct arm_smmu_device
*smmu)
pm_runtime_put_autosuspend(smmu->dev);
}
-static struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom)
-{
- return container_of(dom, struct arm_smmu_domain, domain);
-}
-
static struct platform_driver arm_smmu_driver;
static struct iommu_ops arm_smmu_ops;
@@ -2188,6 +2183,12 @@ static int arm_smmu_device_probe(struct platform_device
*pdev)
if (err)
return err;
+ if (smmu->impl->inherit_mappings) {
+ err = smmu->impl->inherit_mappings(smmu);
+ if (err)
+ return err;
+ }
+
if (smmu->version == ARM_SMMU_V2) {
if (smmu->num_context_banks > smmu->num_context_irqs) {
dev_err(dev,
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h
b/drivers/iommu/arm/arm-smmu/arm-smmu.h
index 235d9a3a6ab6..f58164976e74 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.h
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h
@@ -378,6 +378,11 @@ struct arm_smmu_domain {
struct iommu_domain domain;
};
+static inline struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom)
+{
+ return container_of(dom, struct arm_smmu_domain, domain);
+}
+
struct arm_smmu_master_cfg {
struct arm_smmu_device *smmu;
s16 smendx[];
@@ -442,6 +447,7 @@ struct arm_smmu_impl {
int (*alloc_context_bank)(struct arm_smmu_domain *smmu_domain,
struct arm_smmu_device *smmu,
struct device *dev, int start);
+ int (*inherit_mappings)(struct arm_smmu_device *smmu);
};
#define INVALID_SMENDX -1
--
2.28.0
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