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SubjectRe: [PATCH v4] acpi/iort: numa: Add numa node mapping for smmuv3 devices
Lorenzo, Will,

On 25.07.17 10:32:37, Ganapatrao Kulkarni wrote:
> ARM IORT specification(rev. C) has added provision to define proximity
> domain in SMMUv3 IORT table. Adding required code to parse Proximity
> domain and set numa_node of smmv3 platform devices.
>
> Add code to parse proximity domain in SMMUv3 IORT table to
> set numa node mapping for smmuv3 devices.
>
> Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
> ---
>
> This patch has dependency on header file patch [1], which is
> already merged to linux-pm.
>
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/commit/?h=linux-next&id=c944230064eb65e4fa018d86779b4fd200b1d7e7
>
> v4:
> - Fix compilation issue in !CONFIG_NUMA
>
> v3:
> - Addressed Lorenzo Pieralisi comment.
>
> v2:
> - Changed as per Lorenzo Pieralisi and Hanjun Guo suggestions.
>
> v1:
> - Initial patch
>
> drivers/acpi/arm64/iort.c | 33 +++++++++++++++++++++++++++++++--
> 1 file changed, 31 insertions(+), 2 deletions(-)

could this patch being scheduled for v4.14?

Thanks,

-Robert

>
> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
> index a3215ee..c5c82c3 100644
> --- a/drivers/acpi/arm64/iort.c
> +++ b/drivers/acpi/arm64/iort.c
> @@ -908,6 +908,28 @@ static bool __init arm_smmu_v3_is_coherent(struct acpi_iort_node *node)
> return smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE;
> }
>
> +#if defined(CONFIG_ACPI_NUMA) && (ACPI_CA_VERSION >= 0x20170629)
> +/*
> + * 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);
> + }
> +}
> +#else
> +static void __init arm_smmu_v3_set_proximity(struct acpi_iort_node *node,
> + struct device *dev) { }
> +#endif
> +
> static int __init arm_smmu_count_resources(struct acpi_iort_node *node)
> {
> struct acpi_iort_smmu *smmu;
> @@ -977,20 +999,24 @@ 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
> @@ -1028,6 +1054,9 @@ 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);
> --
> 2.9.4
>
> --
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