linux-kernel - Re: [PATCH v2 2/2] acpi/iort: numa: Add numa node mapping for smmuv3 devices

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Date:   Thu, 8 Jun 2017 08:57:02 +0530
From:   Ganapatrao Kulkarni <gpkulkarni@...il.com>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     Ganapatrao Kulkarni <ganapatrao.kulkarni@...ium.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>, linux-acpi@...r.kernel.org,
        iommu@...ts.linux-foundation.org,
        Will Deacon <Will.Deacon@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>, sudeep.holla@....com,
        robin.murphy@....com, Lv Zheng <lv.zheng@...el.com>,
        joro@...tes.org, "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Jayachandran C <jnair@...iumnetworks.com>
Subject: Re: [PATCH v2 2/2] acpi/iort: numa: Add numa node mapping for smmuv3 devices

On Wed, Jun 7, 2017 at 10:08 PM, Lorenzo Pieralisi
<lorenzo.pieralisi@....com> wrote:
> On Tue, Jun 06, 2017 at 04:17:45PM +0530, Ganapatrao Kulkarni wrote:
>> 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>
>> ---
>>  drivers/acpi/arm64/iort.c | 20 ++++++++++++++++++++
>>  1 file changed, 20 insertions(+)
>>
>> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
>> index bba2b59..b4f328f 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 smmv3 device
>> + */
>> +static void  __init iort_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;
>> @@ -1002,6 +1019,9 @@ static int __init iort_add_smmu_platform_device(struct acpi_iort_node *node)
>>       if (!pdev)
>>               return -ENOMEM;
>>
>> +     if (node->type == ACPI_IORT_NODE_SMMU_V3)
>> +             iort_set_proximity(node, &pdev->dev);
>
> Nit: while at it you may add an ops hook to set the proximity
> (NULL for SMMU v2) and call it if present, it is just to make
> the code adding devices more uniform.

thanks, will do

>
> Who is queueing these patches ? I am asking to make sure we sort
> the ACPICA dependency (there are other IORT/ACPICA patches to consider
> too).
>
> Thanks,
> Lorenzo
>
>>       count = ops->iommu_count_resources(node);
>>
>>       r = kcalloc(count, sizeof(*r), GFP_KERNEL);
>> --
>> 1.8.1.4
>>

thanks
Ganapat