Access Intel ME IPMB from BMC

[Vijay Khemka]

Hi Oskar,
You need to use ipmb-dev driver which is is being used by ipmbbridge. You don’t need ipmb-host as we are having ipmbbridge to replace that.

Regards
-Vijay

From: Oskar Senft <osk at google.com>
Date: Monday, April 20, 2020 at 11:35 AM
To: Vijay Khemka <vijaykhemka at fb.com>
Cc: OpenBMC Maillist <openbmc at lists.ozlabs.org>
Subject: Re: Access Intel ME IPMB from BMC

Hi Vijay

Thanks for the pointer!

I also found both https://github.com/Mellanox/ipmb-host and https://github.com/openbmc/linux/blob/dev-5.4/drivers/char/ipmi/ipmb_dev_int.c.

Is it right that with ipmbbridge I don't need either of them since ipmbbridge uses the raw i2c dev?

Thanks
Oskar.

On Mon, Apr 20, 2020 at 2:12 PM Vijay Khemka <vijaykhemka at fb.com<mailto:vijaykhemka at fb.com>> wrote:
Hi Oskar,
You need to configure your ME channel in ipmb channel config file https://github.com/openbmc/ipmbbridge/blob/master/ipmb-channels.json
And make sure ipmbbridge is running. Then you can send get device id command to ME from command line itself to test if everything is working.



busctl call xyz.openbmc_project.Ipmi.Channel.Ipmb /xyz/openbmc_project/Ipmi/Channel/Ipmb org.openbmc.Ipmb sendRequest yyyyay 1 6 0 0x1 0

Regards
-Vijay

From: openbmc <openbmc-bounces+vijaykhemka=fb.com at lists.ozlabs.org<mailto:fb.com at lists.ozlabs.org>> on behalf of Oskar Senft <osk at google.com<mailto:osk at google.com>>
Date: Saturday, April 18, 2020 at 6:47 PM
To: OpenBMC Maillist <openbmc at lists.ozlabs.org<mailto:openbmc at lists.ozlabs.org>>
Subject: Access Intel ME IPMB from BMC

Hi everyone

I'm trying to find out how I can access the Intel ME via IPMB from the BMC (OpenBMC).

From what I gathered, Intel ME's IPMB is on the PCH's SMLink0. I know this is connected to one of the SMBus modules on my AST2500. But what I can't find out is how I actually send commands there? I'm sure I'm missing a document that makes this obvious.

Or is it as simple as dropping IPMI packets onto the bus?

Is this by any chance already implemented in OpenBMC?

Thanks for any hints!

Oskar
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