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<p>We did see some similar issues on a p570 (and yes I have heard others report no problems on 710 systems). The work-around that we discovered was to not load the IB modules at boot time. Suspect there could be some sequencing issue that Roland points out.<br>
<br>
We used the blacklist to disable IB modules being loaded at bootup. After boot a "modprobe ib_mthca" does not seem to cause the MMIO failure. By the way what kind of power5 machine are you using?<br>
<br>
Pradeep<br>
pradeep@us.ibm.com<br>
<img src="cid:10__=07BBFA11DFF2301C8f9e8a93df938@us.ibm.com" width="16" height="16" alt="Inactive hide details for Roland Dreier <rolandd@cisco.com>">Roland Dreier <rolandd@cisco.com><br>
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<ul><b><font size="2">Roland Dreier <rolandd@cisco.com></font></b><font size="2"> </font><br>
<font size="2">Sent by: openib-general-bounces@openib.org</font>
<p><font size="2">09/20/2005 10:37 AM</font></ul>
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<div align="right"><font size="2">To</font></div></td><td width="100%"><img src="cid:30__=07BBFA11DFF2301C8f9e8a93df938@us.ibm.com" border="0" height="1" width="1" alt=""><br>
<font size="2">Thaddeus Ternes <tternes@gmail.com></font></td></tr>
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<div align="right"><font size="2">cc</font></div></td><td width="100%"><img src="cid:30__=07BBFA11DFF2301C8f9e8a93df938@us.ibm.com" border="0" height="1" width="1" alt=""><br>
<font size="2">openib-general@openib.org</font></td></tr>
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<div align="right"><font size="2">Subject</font></div></td><td width="100%"><img src="cid:30__=07BBFA11DFF2301C8f9e8a93df938@us.ibm.com" border="0" height="1" width="1" alt=""><br>
<font size="2">Re: [openib-general] EEH: MMIO Failure on Power5</font></td></tr>
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<tt> Thaddeus> I'm attempting to bring up a Mellanox card in a Power5<br>
Thaddeus> machine and have hit a snag. I'm wondering if anybody<br>
Thaddeus> else has seen issues similar to this on this particular<br>
Thaddeus> hardware, as these cards seem to work in the Power4<br>
Thaddeus> machines. The card is detected, but then I hit an MMIO<br>
Thaddeus> failure and ib_mthca fails. The call trace (from dmesg)<br>
Thaddeus> is listed below. I do see that the firmware is older,<br>
Thaddeus> but am not sure if that would necessarily bring about<br>
Thaddeus> this problem. Any input is appreciated.<br>
<br>
For what it's worth, I have Mellanox PCI-X HCAs working fine in<br>
POWER5-based OpenPower 710 systems. What kind of system are you using?<br>
<br>
It seems that you may really be hitting an error on the PCI bus that<br>
the pSeries hardware is detecting.<br>
<br>
- R.<br>
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