[PATCH v3 2/2] acpi/iort: numa: Add numa node mapping for smmuv3 devices

[Ganapatrao Kulkarni]

Add code to parse proximity domain in SMMUv3 IORT table to
set numa node mapping for smmuv3 devices.

Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulka...@cavium.com>
---
 drivers/acpi/arm64/iort.c | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index bba2b59..e804386 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -882,6 +882,23 @@ static bool __init arm_smmu_v3_is_coherent(struct 
acpi_iort_node *node)
        return smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE;
 }
 
+/*
+ * set numa proximity domain for smmuv3 device
+ */
+static void  __init arm_smmu_v3_set_proximity(struct acpi_iort_node *node,
+               struct device *dev)
+{
+       struct acpi_iort_smmu_v3 *smmu;
+
+       smmu = (struct acpi_iort_smmu_v3 *)node->node_data;
+       if (smmu->flags & ACPI_IORT_SMMU_V3_PXM_VALID) {
+               set_dev_node(dev, acpi_map_pxm_to_node(smmu->pxm));
+               pr_info("SMMUV3[%llx] Mapped to Proximity domain %d\n",
+                       smmu->base_address,
+                       smmu->pxm);
+       }
+}
+
 static int __init arm_smmu_count_resources(struct acpi_iort_node *node)
 {
        struct acpi_iort_smmu *smmu;
@@ -951,20 +968,24 @@ struct iort_iommu_config {
        int (*iommu_count_resources)(struct acpi_iort_node *node);
        void (*iommu_init_resources)(struct resource *res,
                                     struct acpi_iort_node *node);
+       void (*iommu_set_proximity)(struct acpi_iort_node *node,
+                                    struct device *dev);
 };
 
 static const struct iort_iommu_config iort_arm_smmu_v3_cfg __initconst = {
        .name = "arm-smmu-v3",
        .iommu_is_coherent = arm_smmu_v3_is_coherent,
        .iommu_count_resources = arm_smmu_v3_count_resources,
-       .iommu_init_resources = arm_smmu_v3_init_resources
+       .iommu_init_resources = arm_smmu_v3_init_resources,
+       .iommu_set_proximity = arm_smmu_v3_set_proximity
 };
 
 static const struct iort_iommu_config iort_arm_smmu_cfg __initconst = {
        .name = "arm-smmu",
        .iommu_is_coherent = arm_smmu_is_coherent,
        .iommu_count_resources = arm_smmu_count_resources,
-       .iommu_init_resources = arm_smmu_init_resources
+       .iommu_init_resources = arm_smmu_init_resources,
+       .iommu_set_proximity = NULL
 };
 
 static __init
@@ -1002,6 +1023,9 @@ static int __init iort_add_smmu_platform_device(struct 
acpi_iort_node *node)
        if (!pdev)
                return -ENOMEM;
 
+       if (ops->iommu_set_proximity)
+               ops->iommu_set_proximity(node, &pdev->dev);
+
        count = ops->iommu_count_resources(node);
 
        r = kcalloc(count, sizeof(*r), GFP_KERNEL);
-- 
1.8.1.4