<div dir="ltr"><div>On a side note regarding the ipmb-dev driver: It seems that the Documentation/IPMB.txt has gotten "lost". The only version I could find is this: <a href="https://github.com/openbmc/linux/blob/51bd6f291583684f495ea498984dfc22049d7fd2/Documentation/IPMB.txt" target="_blank">https://github.com/openbmc/linux/blob/51bd6f291583684f495ea498984dfc22049d7fd2/Documentation/IPMB.txt</a>. But it's not in any of the recent branches (dev-5.3 or dev-5.4).</div><div><br></div><div>Should this file be resurrected?</div><div><br></div><div>Oskar.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Apr 23, 2020 at 11:31 AM Oskar Senft <<a href="mailto:osk@google.com">osk@google.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Thanks again!<div><br></div><div>ipmbbridge solved my problem. I found that my version of OpenBMC (incl. kernel) used a slightly older version of ipmbbridge which still used the i2c slave mqueue, which worked fine. Reading a bit of source code made it clear how it worked. The key is to configure ipbm-channels.json with the correct i2c device and the rest "just works".</div><div><br></div><div>For the benefit of others: My understanding is that the current version of ipmbbridge no longer uses the i2c slave mqueue but requires the ipmb-dev driver in the kernel. It's not necessary to actually attach the driver to an i2c device as that can happen at runtime.</div><div><br></div><div>Oskar.<br><div><div><br></div><div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 20, 2020 at 4:34 PM Vijay Khemka <<a href="mailto:vijaykhemka@fb.com" target="_blank">vijaykhemka@fb.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal">Hi Oskar,<u></u><u></u></p>
<p class="MsoNormal">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.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Regards<u></u><u></u></p>
<p class="MsoNormal">-Vijay<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><b><span style="font-size:12pt;color:black">From: </span></b><span style="font-size:12pt;color:black">Oskar Senft <<a href="mailto:osk@google.com" target="_blank">osk@google.com</a>><br>
<b>Date: </b>Monday, April 20, 2020 at 11:35 AM<br>
<b>To: </b>Vijay Khemka <<a href="mailto:vijaykhemka@fb.com" target="_blank">vijaykhemka@fb.com</a>><br>
<b>Cc: </b>OpenBMC Maillist <<a href="mailto:openbmc@lists.ozlabs.org" target="_blank">openbmc@lists.ozlabs.org</a>><br>
<b>Subject: </b>Re: Access Intel ME IPMB from BMC<u></u><u></u></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Hi Vijay <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Thanks for the pointer!<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">I also found both <a href="https://github.com/Mellanox/ipmb-host" target="_blank">https://github.com/Mellanox/ipmb-host</a> and <a href="https://github.com/openbmc/linux/blob/dev-5.4/drivers/char/ipmi/ipmb_dev_int.c" target="_blank">https://github.com/openbmc/linux/blob/dev-5.4/drivers/char/ipmi/ipmb_dev_int.c</a>. <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Is it right that with ipmbbridge I don't need either of them since ipmbbridge uses the raw i2c dev?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Thanks<u></u><u></u></p>
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<p class="MsoNormal">Oskar.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Mon, Apr 20, 2020 at 2:12 PM Vijay Khemka <<a href="mailto:vijaykhemka@fb.com" target="_blank">vijaykhemka@fb.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">Hi Oskar,<u></u><u></u></p>
<p class="MsoNormal">You need to configure your ME channel in ipmb channel config file
<a href="https://github.com/openbmc/ipmbbridge/blob/master/ipmb-channels.json" target="_blank">
https://github.com/openbmc/ipmbbridge/blob/master/ipmb-channels.json</a><u></u><u></u></p>
<p class="MsoNormal">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.<u></u><u></u></p>
<p><span> </span><u></u><u></u></p>
<p><span>busctl call xyz.openbmc_project.Ipmi.Channel.Ipmb /xyz/openbmc_project/Ipmi/Channel/Ipmb org.openbmc.Ipmb sendRequest yyyyay 1 6 0 0x1 0</span><u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Regards<u></u><u></u></p>
<p class="MsoNormal">-Vijay<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal"><b><span style="font-size:12pt;color:black">From:
</span></b><span style="font-size:12pt;color:black">openbmc <openbmc-bounces+vijaykhemka=<a href="mailto:fb.com@lists.ozlabs.org" target="_blank">fb.com@lists.ozlabs.org</a>> on behalf of Oskar Senft <<a href="mailto:osk@google.com" target="_blank">osk@google.com</a>><br>
<b>Date: </b>Saturday, April 18, 2020 at 6:47 PM<br>
<b>To: </b>OpenBMC Maillist <<a href="mailto:openbmc@lists.ozlabs.org" target="_blank">openbmc@lists.ozlabs.org</a>><br>
<b>Subject: </b>Access Intel ME IPMB from BMC</span><u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Hi everyone
<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">I'm trying to find out how I can access the Intel ME via IPMB from the BMC (OpenBMC).<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">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.<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Or is it as simple as dropping IPMI packets onto the bus?<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Is this by any chance already implemented in OpenBMC?<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Thanks for any hints!<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Oskar<u></u><u></u></p>
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