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SubjectRe: [PATCH 1/2] acpi: arm64: add iort support for PMCG
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Hi Lorenzo,

On 8/7/2017 12:44 PM, Lorenzo Pieralisi wrote:
> On Fri, Aug 04, 2017 at 03:59:13PM -0400, Neil Leeder wrote:
[...]
>> + } else if (iort_node->type == ACPI_IORT_NODE_PMCG) {
>> + if (iort_add_smmu_platform_device(iort_node))
>> + return;
>
>
> It is becoming a bit messy, probably it makes sense to rework the
> iommu platform device creation to make room for more generic (ie
> iommu platform device creation is not really iommu specific) behaviour
> that can accommodate the PMCG too, it can be made cleaner.
>
> I do not know if we can make it for this cycle but I am happy to put
> a patch together shortly with this in mind.
>
Ok, I will rebase on top of it when it's ready.

>> }
>>
>> iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort_node,
>> diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
>> index 707dda74..2169b6f 100644
>> --- a/include/acpi/actbl2.h
>> +++ b/include/acpi/actbl2.h
>> @@ -695,7 +695,8 @@ enum acpi_iort_node_type {
>> ACPI_IORT_NODE_NAMED_COMPONENT = 0x01,
>> ACPI_IORT_NODE_PCI_ROOT_COMPLEX = 0x02,
>> ACPI_IORT_NODE_SMMU = 0x03,
>> - ACPI_IORT_NODE_SMMU_V3 = 0x04
>> + ACPI_IORT_NODE_SMMU_V3 = 0x04,
>> + ACPI_IORT_NODE_PMCG = 0x05
>> };
>>
>> struct acpi_iort_id_mapping {
>> @@ -811,6 +812,12 @@ struct acpi_iort_smmu_v3 {
>> #define ACPI_IORT_SMMU_V3_COHACC_OVERRIDE (1)
>> #define ACPI_IORT_SMMU_V3_HTTU_OVERRIDE (1<<1)
>>
>> +struct acpi_iort_pmcg {
>> + u64 base_address; /* PMCG base address */
>> + u32 overflow_gsiv;
>> + u32 node_reference;
>> +};
>
> As Robin already said this hunk should be made an ACPICA pull but
> NOT before seeking IORT specs clarification as per his comments.
>
OK, I will add this through ACPICA once the IORT decision is made.

Thanks,

Neil
--
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.

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