linux-kernel - Re: [PATCH v4] acpi/iort: numa: Add numa node mapping for smmuv3 devices

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Message-ID: <20170815150213.GD18024@rric.localdomain>
Date:   Tue, 15 Aug 2017 17:02:13 +0200
From:   Robert Richter <robert.richter@...ium.com>
To:     Will.Deacon@....com, lorenzo.pieralisi@....com
Cc:     Ganapatrao Kulkarni <ganapatrao.kulkarni@...ium.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-acpi@...r.kernel.org, iommu@...ts.linux-foundation.org,
        hanjun.guo@...aro.org, sudeep.holla@....com, robin.murphy@....com,
        lv.zheng@...el.com, joro@...tes.org, rjw@...ysocki.net,
        lenb@...nel.org, jnair@...iumnetworks.com, gklkml16@...il.com
Subject: Re: [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@...ium.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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