From: Thierry Reding <thierry.reding@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Will Deacon <will@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc: Joerg Roedel <joro@8bytes.org>,
iommu@lists.linux-foundation.org,
Jon Hunter <jonathanh@nvidia.com>,
Nicolin Chen <nicolinc@nvidia.com>,
linux-tegra@vger.kernel.org, Robin Murphy <robin.murphy@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 3/9] iommu/arm-smmu: Implement ->probe_finalize()
Date: Thu, 3 Jun 2021 18:46:26 +0200 [thread overview]
Message-ID: <20210603164632.1000458-4-thierry.reding@gmail.com> (raw)
In-Reply-To: <20210603164632.1000458-1-thierry.reding@gmail.com>
From: Thierry Reding <treding@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 <treding@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
--
2.31.1
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next prev parent reply other threads:[~2021-06-03 16:51 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-03 16:46 [PATCH v3 0/9] arm64: tegra: Prevent early SMMU faults Thierry Reding
2021-06-03 16:46 ` [PATCH v3 1/9] memory: tegra: Implement SID override programming Thierry Reding
2021-06-03 16:46 ` [PATCH v3 2/9] dt-bindings: arm-smmu: Add Tegra186 compatible string Thierry Reding
2021-06-18 19:47 ` Rob Herring
2021-06-21 6:46 ` Krzysztof Kozlowski
2021-06-21 14:11 ` Thierry Reding
2021-06-21 15:54 ` Will Deacon
2021-06-21 16:03 ` Thierry Reding
2021-06-03 16:46 ` Thierry Reding [this message]
2021-06-15 18:01 ` [PATCH v3 3/9] iommu/arm-smmu: Implement ->probe_finalize() Marek Szyprowski
2021-06-15 18:08 ` Robin Murphy
2021-06-15 18:12 ` Krishna Reddy
2021-06-15 18:21 ` Will Deacon
2021-06-15 19:50 ` Will Deacon
2021-06-03 16:46 ` [PATCH v3 4/9] iommu/arm-smmu: tegra: Detect number of instances at runtime Thierry Reding
2021-06-03 16:46 ` [PATCH v3 5/9] iommu/arm-smmu: tegra: Implement SID override programming Thierry Reding
2021-06-03 16:46 ` [PATCH v3 6/9] iommu/arm-smmu: Use Tegra implementation on Tegra186 Thierry Reding
2021-06-03 16:46 ` [PATCH v3 7/9] arm64: tegra: Use correct compatible string for Tegra186 SMMU Thierry Reding
2021-06-03 16:46 ` [PATCH v3 8/9] arm64: tegra: Hook up memory controller to SMMU on Tegra186 Thierry Reding
2021-06-03 16:46 ` [PATCH v3 9/9] arm64: tegra: Enable SMMU support on Tegra194 Thierry Reding
2021-06-03 19:51 ` (subset) [PATCH v3 0/9] arm64: tegra: Prevent early SMMU faults Krzysztof Kozlowski
2021-06-11 6:48 ` Krzysztof Kozlowski
2021-06-11 12:05 ` Thierry Reding
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