Read smbios2 file failed

Fri Sep 17 08:36:10 AEST 2021

Hi,

Actually I added an ipmi blob interface to smbios-mdr
 https://github.com/openbmc/smbios-mdr/tree/master/src/smbios-ipmi-blobs
<https://github.com/openbmc/smbios-mdr/tree/master/src/smbios-ipmi-blobs>.
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.
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> 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://github.com/openbmc/phosphor-ipmi-blobs/blob/master/README.md
>
> 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=
> 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>; Thang Nguyen <
> thang at amperemail.onmicrosoft.com>; openbmc <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%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=oQwcozsSoGlgSFwztPFV3FAoPpRZGYoZ7pc0%2BxDi1MA%3D&reserved=0
> >
> > 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> On Behalf Of Andrei
> >> Kartashev
> >> Sent: Wednesday, September 15, 2021 3:17 AM
> >> To: Thang Nguyen <thang at amperemail.onmicrosoft.com>; openbmc
> >> <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
> >>>>>> F%2Fgithub.com%2Fopenbmc%2Fintel-ipmi-&data=04%7C01%7Cchli
> >>>>>> 30%40nuvoton.com%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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