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From: kholk11@gmail.com
To: will@kernel.org
Cc: robin.murphy@arm.com, joro@8bytes.org,
	bjorn.andersson@linaro.org, linux-arm-kernel@lists.infradead.org,
	devicetree@vger.kernel.org, kholk11@gmail.com,
	marijns95@gmail.com, konradybcio@gmail.com,
	martin.botka1@gmail.com, linux-arm-msm@vger.kernel.org,
	phone-devel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 7/8] iommu/arm-smmu: Support stream_mapping_reset implementation detail
Date: Sat, 26 Sep 2020 15:00:03 +0200
Message-ID: <20200926130004.13528-8-kholk11@gmail.com> (raw)
In-Reply-To: <20200926130004.13528-1-kholk11@gmail.com>

From: AngeloGioacchino Del Regno <kholk11@gmail.com>

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@gmail.com>
---
 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


  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-26 12:59 [PATCH 0/8] Implement firmware quirks for Qualcomm ARM-SMMUv2 kholk11
2020-09-26 12:59 ` [PATCH 1/8] iommu/arm-smmu-qcom: Rename qcom_smmu_impl to qcom_smmu500_impl kholk11
2020-09-26 12:59 ` [PATCH 2/8] iommu/arm-smmu-qcom: Add QC SMMUv2 VA Size quirk for SDM660 kholk11
2020-10-14 15:43   ` Robin Murphy
2020-09-26 12:59 ` [PATCH 3/8] dt-bindings: arm-smmu: add binding for SMMUv2 on Qualcomm SDM660 kholk11
2020-09-29 19:10   ` Rob Herring
2020-09-26 13:00 ` [PATCH 4/8] iommu/arm-smmu: Support test_smr_masks implementation detail deviation kholk11
2020-10-14 15:52   ` Robin Murphy
2020-09-26 13:00 ` [PATCH 5/8] iommu/arm-smmu-qcom: Add test_smr_masks detail to QCOM SMMUv2 kholk11
2020-09-26 13:00 ` [PATCH 6/8] iommu/arm-smmu: Move stream mapping reset to separate function kholk11
2020-10-14 15:56   ` Robin Murphy
2020-09-26 13:00 ` kholk11 [this message]
2020-09-26 13:00 ` [PATCH 8/8] iommu/arm-smmu-qcom: Add stream_mapping_reset detail to QCOM SMMUv2 kholk11
2020-10-14 22:14   ` Bjorn Andersson

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