[RFC PATCH v2 05/58] iommu/arm-smmu-v3: Extract driver-specific bits from probe function

[Mostafa Saleh]

From: Jean-Philippe Brucker <jean-philippe at linaro.org>

As we're about to share the arm_smmu_device_hw_probe() function with the
KVM driver, extract bits that are specific to the normal driver.

Signed-off-by: Jean-Philippe Brucker <jean-philippe at linaro.org>
Signed-off-by: Mostafa Saleh <smostafa at google.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 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 737c5b882355..702863c94f91 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -4167,7 +4167,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
 
 	if (reg & IDR0_MSI) {
 		smmu->features |= ARM_SMMU_FEAT_MSI;
-		if (coherent && !disable_msipolling)
+		if (coherent)
 			smmu->options |= ARM_SMMU_OPT_MSIPOLL;
 	}
 
@@ -4316,11 +4316,6 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
 		smmu->oas = 48;
 	}
 
-	if (arm_smmu_ops.pgsize_bitmap == -1UL)
-		arm_smmu_ops.pgsize_bitmap = smmu->pgsize_bitmap;
-	else
-		arm_smmu_ops.pgsize_bitmap |= smmu->pgsize_bitmap;
-
 	/* Set the DMA mask for our table walker */
 	if (dma_set_mask_and_coherent(smmu->dev, DMA_BIT_MASK(smmu->oas)))
 		dev_warn(smmu->dev,
@@ -4334,9 +4329,6 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
 
 	arm_smmu_device_iidr_probe(smmu);
 
-	if (arm_smmu_sva_supported(smmu))
-		smmu->features |= ARM_SMMU_FEAT_SVA;
-
 	dev_info(smmu->dev, "ias %lu-bit, oas %lu-bit (features 0x%08x)\n",
 		 smmu->ias, smmu->oas, smmu->features);
 	return 0;
@@ -4606,6 +4598,17 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
+	if (arm_smmu_sva_supported(smmu))
+		smmu->features |= ARM_SMMU_FEAT_SVA;
+
+	if (disable_msipolling)
+		smmu->options &= ~ARM_SMMU_OPT_MSIPOLL;
+
+	if (arm_smmu_ops.pgsize_bitmap == -1UL)
+		arm_smmu_ops.pgsize_bitmap = smmu->pgsize_bitmap;
+	else
+		arm_smmu_ops.pgsize_bitmap |= smmu->pgsize_bitmap;
+
 	/* Initialise in-memory data structures */
 	ret = arm_smmu_init_structures(smmu);
 	if (ret)
-- 
2.47.0.338.g60cca15819-goog