回覆: Read smbios2 file failed

Fri Aug 19 19:50:45 AEST 2022

Hello everyone,

I would like to send the SMBIOS table from Host to BMC by using "smbios-ipmi-blobs" interface. But, after reviewing all your discussions, I still have no idea how to enable the feature. Could you help to share more details with me? for example,

  1.  How to generate a raw SMBIOS table with MDRv2 header? (like using "dmidecode --dump-bin" and what else?)
  2.  How do start sending SMBIOS binary file at Host-side? (As I know, the FW update mechanism through IPMI blob would need to build a host-tool, named burn-my-bmc, on the Host and then run the tool to start image data transformation. Does the "smbios-ipmi-blobs" with the same method?)

p.s. The OS running on the Host is Ubuntu 20.04.

Thanks.

Regards,
Chris Chen

________________________________
寄件者: openbmc <openbmc-bounces+chris.chen3=flex.com at lists.ozlabs.org> 代表 Thang Nguyen <thang at amperemail.onmicrosoft.com>
寄件日期: 2021年9月17日 下午 09:40
收件者: Jie Yang <jjy at google.com>
副本: Garrett, Mike (HPE Server Firmware) <mike.garrett at hpe.com>; Andrei Kartashev <a.kartashev at yadro.com>; CS20 CHLi30 <chli30 at nuvoton.com>; openbmc <openbmc at lists.ozlabs.org>
主旨: Re: Read smbios2 file failed

Thanks Jia for your information

On 17/09/2021 05:36, Jie Yang wrote:
Hi,

Actually I added an ipmi blob interface to smbios-mdr https://github.com/openbmc/smbios-mdr/tree/master/src/smbios-ipmi-blobs<https://urldefense.com/v3/__https://github.com/openbmc/smbios-mdr/tree/master/src/smbios-ipmi-blobs__;!!HSntlCg!EtwhV18i5GdJ-OcUFIP0uI2ezn8lbBtTEAcWRgPad7EUuOOzOfTVuW4xtvpYjCWU$>. With this interface you can send the smbios tables to BMC either through LinuxBoot or host. The LinuxBoot code https://github.com/u-root/u-root/tree/master/cmds/exp/smbios_transfer<https://urldefense.com/v3/__https://github.com/u-root/u-root/tree/master/cmds/exp/smbios_transfer__;!!HSntlCg!EtwhV18i5GdJ-OcUFIP0uI2ezn8lbBtTEAcWRgPad7EUuOOzOfTVuW4xtiWmoL2X$>. Writing and committing to this blob will generate the MDR header.

-Jie

On Thu, Sep 16, 2021 at 4:19 AM Thang Nguyen <thang at amperemail.onmicrosoft.com<mailto:thang at amperemail.onmicrosoft.com>> wrote:
Thanks Tim, Mike and Andrei for very useful information. We can make it
work by adding MDRv2 header.

I am finding some information about the IPMI blobs commands. I can see
some notes at

https://github.com/openbmc/docs/blob/master/designs/binarystore-via-blobs.md<https://urldefense.com/v3/__https://github.com/openbmc/docs/blob/master/designs/binarystore-via-blobs.md__;!!HSntlCg!EtwhV18i5GdJ-OcUFIP0uI2ezn8lbBtTEAcWRgPad7EUuOOzOfTVuW4xtoaEVKUv$>

https://github.com/openbmc/phosphor-ipmi-blobs/blob/master/README.md<https://urldefense.com/v3/__https://github.com/openbmc/phosphor-ipmi-blobs/blob/master/README.md__;!!HSntlCg!EtwhV18i5GdJ-OcUFIP0uI2ezn8lbBtTEAcWRgPad7EUuOOzOfTVuW4xtrf-IcxD$>

But I have not found more description about the IPMI blob commands like
NetFn, Func, ... that I can send a file from Host to BMC. Do you have
any information about them?

Thanks,

Thang Q. Nguyen

On 16/09/2021 09:40, CS20 CHLi30 wrote:
> Hi Thang,
> Did you try to use smbios_entry_point or DMI from host to BMC /var/lib/smbios/smbios2 for parsing?
>
> You can refer this sysfs-firmware-dmi-tables as below:
>
> The firmware provides DMI structures as a packed list of data referenced by a SMBIOS table entry point.
> The SMBIOS entry point contains general information, like SMBIOS version, DMI table size, etc.
> The structure, content and size of SMBIOS entry point is dependent on SMBIOS version.
>
> The format of SMBIOS entry point and DMI structures can be read in SMBIOS specification.
> The dmi/tables provides raw SMBIOS entry point and DMI tables through sysfs as an alternative to utilities reading them from /dev/mem.
>
> The raw SMBIOS entry point and DMI table are presented as binary attributes and are accessible via:
> /sys/firmware/dmi/tables/smbios_entry_point
> /sys/firmware/dmi/tables/DMI
>
> Best regards,
> Tim
>
> -----Original Message-----
> From: openbmc [mailto:openbmc-bounces+chli30<mailto:openbmc-bounces%2Bchli30>=nuvoton.com at lists.ozlabs.org<mailto:nuvoton.com at lists.ozlabs.org>] On Behalf Of Garrett, Mike (HPE Server Firmware)
> Sent: Wednesday, September 15, 2021 9:19 PM
> To: Andrei Kartashev <a.kartashev at yadro.com<mailto:a.kartashev at yadro.com>>; Thang Nguyen <thang at amperemail.onmicrosoft.com<mailto:thang at amperemail.onmicrosoft.com>>; openbmc <openbmc at lists.ozlabs.org<mailto:openbmc at lists.ozlabs.org>>
> Subject: RE: Read smbios2 file failed
>
> We recently did the same thing and got it working.  All you have to do is take the RAW smbios records blob in binary form (delivered as noted below in whatever way you choose) and prepend a specific header:  https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fopenbmc%2Fsmbios-mdr%2Fblob%2F33c948a473bd273fea0cff82d4c99b70b7784be6%2Finclude%2Fsmbios_mdrv2.hpp%23L114&data=04%7C01%7Cchli30%40nuvoton.com%7C81a4bd29e4904bf4d84608d978510b92%7Ca3f24931d4034b4a94f17d83ac638e07%7C0%7C0%7C637673526954552742%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjo iV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=oQwcozsSoGlgSFwztPFV3FAoPpRZGYoZ7pc0%2BxDi1MA%3D&reserved=0<https://urldefense.com/v3/__https://apc01.safelinks.protection.outlook.com/?url=https*3A*2F*2Fgithub.com*2Fopenbmc*2Fsmbios-mdr*2Fblob*2F33c948a473bd273fea0cff82d4c99b70b7784be6*2Finclude*2Fsmbios_mdrv2.hpp*23L114&data=04*7C01*7Cchli30*40nuvoton.com*7C81a4bd29e4904bf4d84608d978510b92*7Ca3f24931d4034b4a94f17d83ac638e07*7C0*7C0*7C637673526954552742*7CUnknown*7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0*3D*7C1000&sdata=oQwcozsSoGlgSFwztPFV3FAoPpRZGYoZ7pc0*2BxDi1MA*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUl!!HSntlCg!EtwhV18i5GdJ-OcUFIP0uI2ezn8lbBtTEAcWRgPad7EUuOOzOfTVuW4xtsg8Gx_y$>
>
> It is a little bit fragile as it introduces a dependency on the file download logic to write a non-standard header defined in another service that could potentially change.
>
> Mike
>
>> -----Original Message-----
>> From: openbmc <openbmc-
>> bounces+mike.garrett=hpe.com at lists.ozlabs.org<mailto:hpe.com at lists.ozlabs.org>> On Behalf Of Andrei
>> Kartashev
>> Sent: Wednesday, September 15, 2021 3:17 AM
>> To: Thang Nguyen <thang at amperemail.onmicrosoft.com<mailto:thang at amperemail.onmicrosoft.com>>; openbmc
>> <openbmc at lists.ozlabs.org<mailto:openbmc at lists.ozlabs.org>>
>> Subject: Re: Read smbios2 file failed
>>
>> I don't know what is format of "dmidecode --dump-bin", but if it just
>> raw dump of smbios then you only need to add mdr header.
>>
>> See answer for the same question here:
>> INVALID URI REMOVED
>> 021-July/026882.html__;!!NpxR!2w0FkPs2KyaB6XOvB8et52bWKqAMLImmL-
>> iUk9A_zZbJ8WLhMeXdvRAp-pcxt8Q$
>>
>> On Wed, 2021-09-15 at 12:41 +0700, Thang Nguyen wrote:
>>> Hi Andrei,
>>>
>>> I see output of "dmidecode --dump-bin" follows SMBIOS specification.
>>> As
>>> the data for smbios-mdr does not follow this, do you know about the
>>> document or any information I can reference to prepare data to send
>>> to BMC??
>>>
>>>
>>> Best Regards,
>>>
>>> Thang Q. Nguyen
>>>
>>> On 14/09/2021 15:51, Andrei Kartashev wrote:
>>>> No, it is not same as "dmidecode --dump-bin".
>>>>
>>>> On Tue, 2021-09-14 at 13:46 +0700, Thang Nguyen wrote:
>>>>> On 13/09/2021 23:56, Andrei Kartashev wrote:
>>>>>> You need to somehow deliver smbios data image to BMC. This
>>>>>> means, your BIOS should implementat some logic to transfer
>>>>>> this data.
>>>>>> For BMC side see example here:
>>>>>> https://apc01.safelinks.protection.outlook.com/?url=https%3A%2<https://urldefense.com/v3/__https://apc01.safelinks.protection.outlook.com/?url=https*3A*2__;JSU!!HSntlCg!EtwhV18i5GdJ-OcUFIP0uI2ezn8lbBtTEAcWRgPad7EUuOOzOfTVuW4xtgGDlRqi$>
>>>>>> F%2Fgithub.com%2Fopenbmc%2Fintel-ipmi-&data=04%7C01%7Cchli
>>>>>> 30%40nuvoton.com<https://urldefense.com/v3/__http://40nuvoton.com__;!!HSntlCg!EtwhV18i5GdJ-OcUFIP0uI2ezn8lbBtTEAcWRgPad7EUuOOzOfTVuW4xthWsemHr$>%7C81a4bd29e4904bf4d84608d978510b92%7Ca3f24931
>>>>>> d4034b4a94f17d83ac638e07%7C0%7C0%7C637673526954552742%7CUnknow
>>>>>> n%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik
>>>>>> 1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=cG6ZZzOSXkuUtcQuuoymsRdP
>>>>>> p24mINa%2FhCy%2BYhe%2FNmk%3D&reserved=0
>> oem/blob/master/src/smbios
>>>>>> mdrv2handler.cpp
>>>>> Hi Andrei,
>>>>>
>>>>> What is the format of smbios data to transfer to BMC? Is it the
>>>>> same content of "dmidecode --dump-bin" command from Host Linux?
>> or
>>>>> anything special in formatting the content to send?
>>>>>
>>>>>> On Mon, 2021-09-13 at 17:40 +0300, Alexander Raih wrote:
>>>>>>> Hi guys, I am beginner in openbmc I build openbmc with
>>>>>>> smbios-mdr repository and I have error:
>>>>>>>
>>>>>>> Read data from flash error - Open MDRV2 table file failure
>>>>>>>
>>>>>>> There isnt file in /var/lib/smbios/smbios2
>>>>>>>
>>>>>>> How I can resolve this problem?
>>>>>>> Help me please!!!
>>
>> --
>> Best regards,
>> Andrei Kartashev
>>
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