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Subject: Re: Where to collect information for Redfish System's Processors,
 Storage, Memory data
To: Ed Tanous <edtanous@google.com>
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From: Thang Nguyen <thang@os.amperecomputing.com>
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On 18/03/2021 23:07, Ed Tanous wrote:
> On Thu, Mar 18, 2021 at 1:26 AM Thang Nguyen
> <thang@os.amperecomputing.com> wrote:
>>
>> On 18/03/2021 02:45, Ed Tanous wrote:
>>> On Tue, Mar 16, 2021 at 3:22 AM Thang Nguyen
>>> <thang@os.amperecomputing.com> wrote:
>>>> Hi,
>>>>
>>>> I am looking for how to support Redfish System schema which information
>>>> from Host:
>>>>
>>>> - Processors: redfish/v1/Systems/system/Processors
>>>>
>>>> - Storage: redfish/v1/Systems/system/Storage
>>>>
>>>> - Memory: redfish/v1/Systems/system/Memory
>>>>
>>>> I looked into the bmcweb repository at redfish-core/lib/memory.hpp and
>>>> redfish-core/lib/pcie.hpp but just see doGet() function to read data
>>>> from dbus to report via Redfish. There is no doPost() function to post
>>>> codes to Redfish.
>>> Today, there's no way to do this sort of Redfish POST/PATCH for normal
>>> BIOS use cases.  I'm working on a design doc for how to add this (via
>>> redfish host interface) to bmcweb.  If you have any ideas here for how
>>> this should work, or requirements for what you're trying to do,
>>> please, share.
>> I checked on the Redfish Schema Supplement document and saw attributes
>> from the Memory, Pcie, ... schema are read-only. It means no POST/PATCH
>> action is supported now.
>>
>> How's about suggesting on supporting POST/PATCH action with the needed
>> information change to read-write? UEFI will then collect data and send
>> Redfish commands via the Redfish Host Interface.
>
> That's effectively what I'm hoping to propose.  ar ethe Memory and
> PCIe schemas the only things you need?

I think the following information should be sent from UEFI: CPU 
(information in SMBIOS type 4)), Memory, PCIE, Storage (SSD/NVMe, HDD, 
...) and firmware information (information in SMBIOS Type 0).

I see in some hardware designs, there are I2C connections from BMC to 
DIMM SPD and PCIE slots. I wonder if we can have alternative way to read 
DIMM SPD and PCIE devices information.

>
>>>> My questions are:
>>>>
>>>> 1. How can Host BIOS collect information and send to BMC so that BMC can
>>>> report via Redfish? via in-band Redfish?
>>>>
>>>> 2. If the information is not from BIOS, how can BMC collect information?
>>>> What recipes/repositories are used to collect information?
>>>>
>>>>
>>>> Thanks,
>>>>
>>>> Thang Q. Nguyen -
>>>>