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Message-ID: <8a2629bb98cabb1be72b32c120bb5ed0114b21bc.1724453781.git.nicolinc@nvidia.com>
Date: Fri, 23 Aug 2024 17:10:40 -0700
From: Nicolin Chen <nicolinc@...dia.com>
To: <will@...nel.org>
CC: <robin.murphy@....com>, <joro@...tes.org>, <jgg@...dia.com>,
<thierry.reding@...il.com>, <vdumpa@...dia.com>, <jonathanh@...dia.com>,
<linux-kernel@...r.kernel.org>, <iommu@...ts.linux.dev>,
<linux-arm-kernel@...ts.infradead.org>, <linux-tegra@...r.kernel.org>
Subject: [PATCH v13 06/10] iommu/arm-smmu-v3: Add acpi_smmu_acpi_probe_model for impl
For model-specific implementation, repurpose the acpi_smmu_get_options()
to a wider acpi_smmu_acpi_probe_model(). A new model can add to the list
in this new function.
Suggested-by: Will Deacon <will@...nel.org>
Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index afdb8a76a72a..ceb31d63f79b 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -4341,18 +4341,28 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
}
#ifdef CONFIG_ACPI
-static void acpi_smmu_get_options(u32 model, struct arm_smmu_device *smmu)
+static int acpi_smmu_iort_probe_model(struct acpi_iort_node *node,
+ struct arm_smmu_device *smmu)
{
- switch (model) {
+ struct acpi_iort_smmu_v3 *iort_smmu =
+ (struct acpi_iort_smmu_v3 *)node->node_data;
+
+ switch (iort_smmu->model) {
case ACPI_IORT_SMMU_V3_CAVIUM_CN99XX:
smmu->options |= ARM_SMMU_OPT_PAGE0_REGS_ONLY;
break;
case ACPI_IORT_SMMU_V3_HISILICON_HI161X:
smmu->options |= ARM_SMMU_OPT_SKIP_PREFETCH;
break;
+ case ACPI_IORT_SMMU_V3_GENERIC:
+ break;
+ default:
+ dev_err(smmu->dev, "Unknown/unsupported IORT model!\n");
+ return -ENXIO;
}
dev_notice(smmu->dev, "option mask 0x%x\n", smmu->options);
+ return 0;
}
static int arm_smmu_device_acpi_probe(struct platform_device *pdev,
@@ -4367,8 +4377,6 @@ static int arm_smmu_device_acpi_probe(struct platform_device *pdev,
/* Retrieve SMMUv3 specific data */
iort_smmu = (struct acpi_iort_smmu_v3 *)node->node_data;
- acpi_smmu_get_options(iort_smmu->model, smmu);
-
if (iort_smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE)
smmu->features |= ARM_SMMU_FEAT_COHERENCY;
@@ -4380,7 +4388,7 @@ static int arm_smmu_device_acpi_probe(struct platform_device *pdev,
smmu->features |= ARM_SMMU_FEAT_HA;
}
- return 0;
+ return acpi_smmu_iort_probe_model(node, smmu);
}
#else
static inline int arm_smmu_device_acpi_probe(struct platform_device *pdev,
--
2.43.0
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