Hi Hank,
Thanks for the reply. The IBM server that we have is an x3850 X5 with Intel
processors, so I do not think it is the POWER architecture that you mentioned.
>From my understanding, the BMC and devices on the SMBus should be able to
>communicate in AUX power (power to main CPU is off, OS is not running). So,
>from the IMM port, the BMC should still be able to communicate via IPMI while
>the main power is off. I've tried with both the power off (AUX) and power on
>(OS up and running).
I've heard that our device in the PCI slot should be able to communicate with
the BMC in AUX power mode, so I think it should be available to the BMC. The
main issue I have is how to communicate with the device from outside the
server. Hence, I've been looking into IPMI and the IMM management port using
IPMI.
Do you happen to know how I might bridge IPMI to SMBus or I2C to get to the PCI
device? I noticed that there is a "raw" command in IPMI. Also, there appears
to be a "Send Message" and "Get Message" command that is supposed to bridge
between channels. Not sure if these avenues will help me, though...
You are right, in that I need to make sure the IBM server is even allowing the
communication between the BMC and the device in the PCI slot. From what I've
seen so far, it looks like it may not, but then again it could just be that I
don't know how to "bridge" from the outside protocol (IPMI) to the internal bus.
Thanks for the help,
Steve
Date: Tue, 3 Feb 2015 06:04:34 -0500
Subject: Re: [Ipmitool-devel] How do I find information on a PCI device using
ipmitool over the network?
From: h...@jblade.com
To: smrca...@outlook.com
CC: ipmitool-devel@lists.sourceforge.net
What model IBM server ? If it is the POWER architecture?
There might not be any electrical connection between the PCI connector pins
that the SMBus and the BMC. Neither the PCI spec or the IPMI spec require that
the PCI Bus's SMBus is connected to the BMC. It is up to the server vendor if
they what to add value by connecting the PCI SMBus to to the BMC.
On the PCI card the SMBus is also optional. It is possible to have a
motherboard that connects the BMC to the PCI slosts but the PCI cards do not
implement the SMBus.
To debug this you might try this:
1) Examine the server vendor documentation and see if the PCI SMBus has an
electrical path to the BMC. Thr SMBus might only be routed to a CPU that runs
the BIOS or what ever IBM uses for that.
2) Find out if the PCI card implements the SMBus
3) Ensure that the SMBus is operating. The PCI Bus can be powered off but the
SMBus can be powered on and still operate. You did not mention if the main CPU
is powered on. If it is not there would be a IPMI OEM command to power on/off
the PCI bus or power is supplied to the PCI and SMBus when the CPUs are turned
on by the BMC.
Hank
On Mon, Feb 2, 2015 at 7:44 PM, Steve M <smrca...@outlook.com> wrote:
Hi,
I've been having quite a time trying to use ipmitool to discover and monitor a
PCI device in my server. Using an IBM server going through IMM over the network
using ipmitool, I can't seem to be able to get any information on the PCI
devices in the server. The ipmitool only returns basic information on the
system such as the BMC, chassis, power supplies, fans, etc. No information on
the devices plugged into the PCI slots.
I've tried basic commands like "fru print", "sdr elist", etc. and haven't been
able to get any information from the devices in the PCI slots.
Just hoping someone has had experience using ipmitool to be able to get
information from the devices in the PCI slots.
Specifically, I would like to get the FRU information as well as device ID, I2C
slave address, etc. for accessing the PCI device.
Thanks for any information that you can provide...
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