netdev - RE: 82571EB: Detected Hardware Unit Hang

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Date:	Thu, 12 Jul 2012 02:52:22 +0000
From:	"Dave, Tushar N" <tushar.n.dave@...el.com>
To:	Joe Jin <joe.jin@...cle.com>
CC:	"e1000-devel@...ts.sf.net" <e1000-devel@...ts.sf.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: 82571EB: Detected Hardware Unit Hang

>-----Original Message-----
>From: Joe Jin [mailto:joe.jin@...cle.com]
>Sent: Wednesday, July 11, 2012 7:23 PM
>To: Dave, Tushar N
>Cc: e1000-devel@...ts.sf.net; netdev@...r.kernel.org; linux-
>kernel@...r.kernel.org
>Subject: Re: 82571EB: Detected Hardware Unit Hang
>
>On 07/12/12 02:51, Dave, Tushar N wrote:
>>
>> Joe,
>>
>> I see couple of errors in lspci output.
>> Device capability status register shows UnCorrectable PCIe error. This
>means there is certainly something went wrong. The only way to recover
>from Uncorrectable errors is reset.
>>
>> 	DevSta:	CorrErr- *UncorrErr+ FatalErr+ UnsuppReq+ AuxPwr+
>TransPend-
>>
>> Also AER sections in lspci output shows PCIe completion timeout.
>>
>> 	Capabilities: [100 v1] Advanced Error Reporting
>> 		UESta:	DLP- SDES- TLP- FCP- *CmpltTO+ CmpltAbrt- UnxCmplt-
>RxOF- MalfTLP+ ECRC- UnsupReq+ ACSViol-
>>
>> I suggest you should load AER driver and check for any error messages in
>log. Also please check any error message reported by system in BIOS log.
>Are there any machine check errors?
>>
>> When did you notice this issue? have 82571 ever been working before on
>this server?
>>
>> One more thing, Cache line size 256 is little unusual( I never seen this
>value before, mostly it's 64). Does BIOS settings have been changed? Are
>you using default BIOS setting?
>>
>
>I checked BIOS's log found the fault from the device, I changed "PCI-E
>Payload Size"
>from 256(default) to 128, now the device works.
>
>I compared lspci output found Address for data of MSI Capabilities's be
>changed:
>
>Old:
>        Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>                Address: 00000000fee21000  Data: 40cb
>
>New:
>        Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>                Address: 00000000fee24000  Data: 405c
>
>Mostly like it's a BIOS bug? please comments.
>
>Thanks,
>Joe

What is the exact error messages in BIOS log?

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