From: AngeloGioacchino Del Regno <kholk11@xxxxxxxxx>
Some IOMMUs may be in need of overriding the stream mapping reset
function and this is seen on at least some Qualcomm SoCs:
add a stream_mapping_reset function to the implementation details
and call it in the appropriate function.
Signed-off-by: AngeloGioacchino Del Regno <kholk11@xxxxxxxxx>
---
drivers/iommu/arm/arm-smmu/arm-smmu.c | 5 +++++
drivers/iommu/arm/arm-smmu/arm-smmu.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index 8c070c493315..44571873f148 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -1656,6 +1656,11 @@ static void arm_smmu_stream_mapping_reset(struct arm_smmu_device *smmu)
{
int i;
+ if (smmu->impl && smmu->impl->stream_mapping_reset) {
+ smmu->impl->stream_mapping_reset(smmu);
+ return;
+ }
+
/*
* Reset stream mapping groups: Initial values mark all SMRn as
* invalid and all S2CRn as bypass unless overridden.
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h b/drivers/iommu/arm/arm-smmu/arm-smmu.h
index 2cd3d126f675..9c045594b8cf 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.h
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h
@@ -387,6 +387,7 @@ struct arm_smmu_impl {
int (*cfg_probe)(struct arm_smmu_device *smmu);
int (*reset)(struct arm_smmu_device *smmu);
int (*init_context)(struct arm_smmu_domain *smmu_domain);
+ void (*stream_mapping_reset)(struct arm_smmu_device *smmu);
void (*test_smr_masks)(struct arm_smmu_device *smmu);
void (*tlb_sync)(struct arm_smmu_device *smmu, int page, int sync,
int status);
--
2.28.0
