RE: 82571EB: Detected Hardware Unit Hang

From: Dave, Tushar N
Date: Tue Nov 20 2012 - 03:58:53 EST

>-----Original Message-----
>From: Joe Jin [mailto:joe.jin@xxxxxxxxxx]
>Sent: Sunday, November 18, 2012 9:38 PM
>To: Dave, Tushar N
>Cc: e1000-devel@xxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux-
>kernel@xxxxxxxxxxxxxxx; Mary Mcgrath
>Subject: Re: 82571EB: Detected Hardware Unit Hang
>
>On 11/16/12 04:26, Dave, Tushar N wrote:
>>> Would you please help to fine the offset of max payload size in eeprom?
>>> I'd like to have a try to modify it by ethtool.
>>
>> It is defined using bit 8 of word 0x1A.
>> Bit value 0 = 128B , bit value 1 = 256B
>
>Hi Tushar,
>
>I checked one of my server which Max Payload Size is 128:
>
># lspci -vvv -s 52:00.1
>52:00.1 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet
>Controller (rev 06)
> Subsystem: Intel Corporation PRO/1000 PT Quad Port Server Adapter
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
>ParErr+ Stepping- SERR- FastB2B- DisINTx+
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
><TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0, Cache Line Size: 64 bytes
> Interrupt: pin B routed to IRQ 266
> Region 0: Memory at dfea0000 (32-bit, non-prefetchable)
>[size=128K]
> Region 1: Memory at dfe80000 (32-bit, non-prefetchable)
>[size=128K]
> Region 2: I/O ports at 6020 [size=32]
> [virtual] Expansion ROM at d8120000 [disabled] [size=128K]
> Capabilities: [c8] Power Management version 2
> Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-
>,D3hot+,D3cold-)
> Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=1 PME-
> Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
> Address: 00000000fee00000 Data: 409a
> Capabilities: [e0] Express (v1) Endpoint, MSI 00
> DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s
><512ns, L1 <64us
> ExtTag- AttnBtn- AttnInd- PwrInd- RBE- FLReset-
> DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+
>Unsupported+
> RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
> MaxPayload 128 bytes, MaxReadReq 4096 bytes
> DevSta: CorrErr- UncorrErr- FatalErr+ UnsuppReq+ AuxPwr-
>TransPend-
> LnkCap: Port #0, Speed 2.5GT/s, Width x4, ASPM L0s,
>Latency L0 <4us, L1 <64us
> ClockPM- Surprise- LLActRep- BwNot-
> LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain-
>CommClk+
> ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> LnkSta: Speed 2.5GT/s, Width x4, TrErr- Train- SlotClk+
>DLActive- BWMgmt- ABWMgmt-
> Capabilities: [100 v1] Advanced Error Reporting
> UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt-
>RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol-
> UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt-
>RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol-
> UESvrt: DLP+ SDES- TLP+ FCP+ CmpltTO+ CmpltAbrt+ UnxCmplt+
>RxOF+ MalfTLP+ ECRC- UnsupReq+ ACSViol-
> CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout-
>NonFatalErr-
> CEMsk: RxErr+ BadTLP+ BadDLLP+ Rollover+ Timeout+
>NonFatalErr-
> AERCap: First Error Pointer: 14, GenCap- CGenEn- ChkCap-
>ChkEn-
> Capabilities: [140 v1] Device Serial Number 00-15-17-ff-ff-16-ed-
>86
> Kernel driver in use: e1000e
> Kernel modules: e1000e
>
>And eeprom dump as below:
>
>Offset Values
>------ ------
>0x0000 00 15 17 16 ed 86 24 05 ff ff a2 50 ff ff ff ff
>0x0010 57 d4 07 74 2f a4 a4 11 86 80 a4 10 86 80 65 b1
>0x0020 08 00 a4 10 00 58 00 00 01 50 00 00 00 00 00 01
>0x0030 f6 6c b0 37 a6 07 03 84 83 07 00 00 03 c3 02 06
>0x0040 08 00 f0 0e 64 21 40 00 01 40 00 00 00 00 00 00
>0x0050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>0x0060 00 01 00 40 1e 12 07 40 00 01 00 40 ff ff ff ff
>
>
>If I did not misunderstand, the value of offset 0x1a is 0x07a6, then the
>bit 8 is 1, but my NIC's MPS is 128b, anything I'm wrong?

Have you power off the system completely after modifying eeprom? If not please do so.
-Tushar
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