Subject: Re: Detected Hardware Unit Hang on Intel Wired Ethernet

From: Pratyush Anand <[email-masked]>
Date: Fri, 6 Jan 2012 09:55:01 +0530

Thanks Tushar,

On 1/6/2012 5:24 AM, Dave, Tushar N wrote:
> Anand,
>
> Sorry to hear that you have this issue with card. And yeah, thanks for doing the debugging and providing the bus trace.
> I think we should run the debug driver that prints the HW ring details when hang occurs. I can provide you a debug driver. You can then install debug driver and also let the bus tracer running. Once the issue occurs, provide me the full dmesg output (that has HW ring details) and bus trace.
>
> Tell me which card you have, 1gig or 10gig? Which driver are you running e1000e or igb or ixgbe?
> Can you also provide ethtool -i ethx output.
>
> Once I know which driver, I send you debug driver.

I am using Intel PRO/1000 PT Server Adapter.
http://www.intel.com/content/www/us/en/network-adapters/gigabit-network-adapters/pro-1000-pt.html

I am using e1000e driver.

I see the problem when I try to mount rootfilesystem using NFS and use 
MSI interrupt. I see this issue even before I can have cell prompt. 
Please see first mail in this thread.

http://www.mail-archive.com/[email-masked]/msg04894.html

Here, you can also see tx ring details when issue occur.
Please let me know, if you need any more info.

Regards
Pratyush

>
> Thanks.
>
> -Tushar
>
> -----Original Message-----
> From: [email-masked] [mailto:[email-masked]] On Behalf Of Pratyush Anand
> Sent: Wednesday, January 04, 2012 8:31 PM
> To: Greg KH
> Cc: Pratyush Anand; [email-masked]; [email-masked]; Shiraz HASHIM; Deepak SIKRI; Bhavna YADAV; [email-masked]; Linux NICS
> Subject: Re: Detected Hardware Unit Hang on Intel Wired Ethernet
>
> On 1/5/2012 12:52 AM, Greg KH wrote:
>> On Wed, Jan 04, 2012 at 04:31:36PM +0530, Pratyush Anand wrote:
>>> Adding PCI mailing list too, as problem is coming only when MSI is enabled.
>>>
>>> If I connect an PCIe analyzer, I see that at the time of issue
>>> MRd(64) for 32 words has been issued with a wrong 64 bit address
>>> from ethernet card to my RC.
>>> In the normal course it always issues MRd(32) only.
>>
>> Bug in your pcie firmware controller?
>>
>> .
>>
>
> when you say "Bug in your pcie firmware controller?", is it RC's
> software or EP's software?
>
> Here I am pasting a part of analyzer log converted into text.
> Packet(177940), is an upstream request for MSI. Whenever any device
> writes at address 0x58A8F8, my PCIe RC considers it as MSI and generates
> an interrupt. So I receive MSI interrupt correctly in my software. Also
> MSI controller is correctly able to point me that the interrupt is from
> ethernet card.
>
> Now in Packet(178010), ethernet controller sends another upstream
> request for MRd(64) of 32 dwords with Address(AFECEB87:A9D88B00).Since,
> this address does not exist in my RC's world so, an UR is returned and
> hence the problem occurs.
>
> Now, question is, why ethernet card is generating inbound request with
> such a wrong address. I have taken log of all the tx_desc->buffer_addr
> programmed by software in function e1000_tx_queue. None of them is 64
> bit or any invalid address.
>
> _______|_______________________________________________________________________
> Packet(177916) Upstream 2.5(x1) TLP(1475) Mem MWr(32)(10:00000) Length(4)
> _______| RequesterID(003:00:0) Tag(2) Address(0EB00200) 1st BE(1111)
> _______| Last BE(1111) Data(4 dwords) LCRC(0x44E0407C)
> _______| Time Stamp(0013 . 460 549 544 s)
> _______|_______________________________________________________________________
> Packet(177918) Downstream 2.5(x1) DLLP ACK AckNak_Seq_Num(1475)
> _______| CRC 16(0x0EB7) Time Stamp(0013 . 460 551 144 s)
> _______|_______________________________________________________________________
> Packet(177940) Upstream 2.5(x1) TLP(1476) Mem MWr(32)(10:00000) Length(1)
> _______| RequesterID(003:00:0) Tag(30) Address(0058A8F8) 1st BE(0011)
> _______| Last BE(0000) Data(1 dword) LCRC(0xC21F32B6)
> _______| Time Stamp(0013 . 460 588 544 s)
> _______|_______________________________________________________________________
> Packet(177942) Downstream 2.5(x1) DLLP ACK AckNak_Seq_Num(1476)
> _______| CRC 16(0x69F5) Time Stamp(0013 . 460 590 088 s)
> _______|_______________________________________________________________________
> Packet(177946) Downstream 2.5(x1) TLP(309) Mem MRd(32)(00:00000) Length(1)
> _______| RequesterID(002:00:0) Tag(19) Address(C01000C0) 1st BE(1111)
> _______| Last BE(0000) LCRC(0x91BDA1F5) Time Stamp(0013 . 460 595 936 s)
> _______|_______________________________________________________________________
> Packet(177947) Upstream 2.5(x1) DLLP ACK AckNak_Seq_Num(309)
> _______| CRC 16(0x25C6) Time Stamp(0013 . 460 596 368 s)
> _______|_______________________________________________________________________
> Packet(177950) Upstream 2.5(x1) TLP(1477) Cpl CplD(10:01010) Length(1)
> _______| RequesterID(002:00:0) Tag(19) CompleterID(003:00:0) Status(SC)
> BCM(0)
> _______| Byte Cnt(4) Lwr Addr(0x40) Data(1 dword) LCRC(0x8FE0D922)
> _______| Time Stamp(0013 . 460 597 304 s)
> _______|_______________________________________________________________________
> Packet(177952) Downstream 2.5(x1) DLLP ACK AckNak_Seq_Num(1477)
> _______| CRC 16(0xC8EE) Time Stamp(0013 . 460 598 840 s)
> _______|_______________________________________________________________________
> Packet(177999) Downstream 2.5(x1) TLP(310) Mem MWr(32)(10:00000) Length(1)
> _______| RequesterID(002:00:0) Tag(0) Address(C0103818) 1st BE(1111)
> _______| Last BE(0000) Data(1 dword) LCRC(0xA898D9A1)
> _______| Time Stamp(0013 . 460 687 936 s)
> _______|_______________________________________________________________________
> Packet(178001) Upstream 2.5(x1) DLLP ACK AckNak_Seq_Num(310)
> _______| CRC 16(0xC6EA) Time Stamp(0013 . 460 688 384 s)
> _______|_______________________________________________________________________
> Packet(178004) Upstream 2.5(x1) TLP(1478) Mem MRd(32)(00:00000) Length(4)
> _______| RequesterID(003:00:0) Tag(4) Address(0EAFB990) 1st BE(1111)
> _______| Last BE(1111) LCRC(0xB54722D2) Time Stamp(0013 . 460 689 312 s)
> _______|_______________________________________________________________________
> Packet(178006) Downstream 2.5(x1) TLP(311) Cpl CplD(10:01010) Length(4)
> _______| RequesterID(003:00:0) Tag(4) CompleterID(002:00:0) Status(SC)
> BCM(0)
> _______| Byte Cnt(16) Lwr Addr(0x10) Data(4 dwords) LCRC(0xFE303776)
> _______| Time Stamp(0013 . 460 690 288 s)
> _______|_______________________________________________________________________
> Packet(178007) Upstream 2.5(x1) DLLP ACK AckNak_Seq_Num(311)
> _______| CRC 16(0x67F1) Time Stamp(0013 . 460 690 776 s)
> _______|_______________________________________________________________________
> Packet(178008) Downstream 2.5(x1) DLLP ACK AckNak_Seq_Num(1478)
> _______| CRC 16(0x2BC2) Time Stamp(0013 . 460 690 824 s)
> _______|_______________________________________________________________________
> Packet(178010) Upstream 2.5(x1) TLP(1479) Mem MRd(64)(01:00000) Length(32)
> _______| RequesterID(003:00:0) Tag(11) Address(AFECEB87:A9D88B00) 1st
> BE(1100)
> _______| Last BE(0011) LCRC(0x6BE341C9) Time Stamp(0013 . 460 691 680 s)
> _______|_______________________________________________________________________
> Packet(178011) Upstream 2.5(x1) TLP(1480) Mem MRd(64)(01:00000) Length(32)
> _______| RequesterID(003:00:0) Tag(8) Address(AFECEB87:A9D88B7C) 1st
> BE(1100)
> _______| Last BE(0011) LCRC(0xAA5647BD) Time Stamp(0013 . 460 691 808 s)
> _______|_______________________________________________________________________
> Packet(178012) Upstream 2.5(x1) TLP(1481) Mem MRd(64)(01:00000) Length(32)
> _______| RequesterID(003:00:0) Tag(9) Address(AFECEB87:A9D88BF8) 1st
> BE(1100)
> _______| Last BE(0011) LCRC(0xEEB1F63F) Time Stamp(0013 . 460 692 120 s)
> _______|_______________________________________________________________________
> Packet(178013) Upstream 2.5(x1) TLP(1482) Mem MRd(64)(01:00000) Length(32)
> _______| RequesterID(003:00:0) Tag(10) Address(AFECEB87:A9D88C74) 1st
> BE(1100)
> _______| Last BE(0011) LCRC(0xA508142C) Time Stamp(0013 . 460 692 248 s)
> _______|_______________________________________________________________________
> Packet(178014) Downstream 2.5(x1) TLP(312) Cpl Cpl(00:01010) Length(0)
> _______| RequesterID(003:00:0) Tag(11) CompleterID(002:00:0) Status(UR)-BAD
> _______| BCM(0) Byte Cnt(124) Lwr Addr(0x02) LCRC(0xCE5540D2)
> _______| Time Stamp(0013 . 460 692 328 s)
> _______|_______________________________________________________________________
> Packet(178015) Downstream 2.5(x1) TLP(313) Cpl Cpl(00:01010) Length(0)
> _______| RequesterID(003:00:0) Tag(8) CompleterID(002:00:0) Status(UR)-BAD
> _______| BCM(0) Byte Cnt(124) Lwr Addr(0x7E) LCRC(0x9FE2487D)
> _______| Time Stamp(0013 . 460 692 456 s)
> _______|_______________________________________________________________________
> Packet(178016) Upstream 2.5(x1) DLLP ACK AckNak_Seq_Num(312)
> _______| CRC 16(0x086E) Time Stamp(0013 . 460 692 760 s)
> _______|_______________________________________________________________________
> Packet(178017) Downstream 2.5(x1) TLP(314) Cpl Cpl(00:01010) Length(0)
> _______| RequesterID(003:00:0) Tag(9) CompleterID(002:00:0) Status(UR)-BAD
> _______| BCM(0) Byte Cnt(124) Lwr Addr(0x7A) LCRC(0x097BF4DE)
> _______| Time Stamp(0013 . 460 692 776 s)
> _______|_______________________________________________________________________
> Packet(178018) Upstream 2.5(x1) DLLP ACK AckNak_Seq_Num(313)
> _______| CRC 16(0xA975) Time Stamp(0013 . 460 692 888 s)
> _______|_______________________________________________________________________
> Packet(178019) Downstream 2.5(x1) TLP(315) Cpl Cpl(00:01010) Length(0)
> _______| RequesterID(003:00:0) Tag(10) CompleterID(002:00:0) Status(UR)-BAD
> _______| BCM(0) Byte Cnt(124) Lwr Addr(0x76) LCRC(0x64BDF921)
> _______| Time Stamp(0013 . 460 692 904 s)
> _______|_______________________________________________________________________
> Packet(178020) Upstream 2.5(x1) TLP(1483) Msg Msg(01:10000)
> _______| Msg Routing(To RC) Length(0) RequesterID(003:00:0) Tag(31)
> _______| Message Code(ERR_FATAL) LCRC(0xCDA53E96)
> _______| Time Stamp(0013 . 460 693 184 s)
> _______|_______________________________________________________________________
> Packet(178021) Downstream 2.5(x1) DLLP ACK AckNak_Seq_Num(1482)
> _______| CRC 16(0xA771) Time Stamp(0013 . 460 693 208 s)
> _______|_______________________________________________________________________
> Packet(178023) Upstream 2.5(x1) DLLP ACK AckNak_Seq_Num(314)
> _______| CRC 16(0x4A59) Time Stamp(0013 . 460 693 280 s)
> _______|_______________________________________________________________________
> Packet(178024) Upstream 2.5(x1) TLP(1484) Msg Msg(01:10000)
> _______| Msg Routing(To RC) Length(0) RequesterID(003:00:0) Tag(31)
> _______| Message Code(ERR_FATAL) LCRC(0x86D9ACB6)
> _______| Time Stamp(0013 . 460 693 312 s)
> _______|_______________________________________________________________________
> Packet(178025) Upstream 2.5(x1) DLLP ACK AckNak_Seq_Num(315)
> _______| CRC 16(0xEB42) Time Stamp(0013 . 460 693 408 s)
> _______|_______________________________________________________________________
> Packet(178026) Upstream 2.5(x1) TLP(1485) Msg Msg(01:10000)
> _______| Msg Routing(To RC) Length(0) RequesterID(003:00:0) Tag(31)
> _______| Message Code(ERR_FATAL) LCRC(0xC5120A31)
> _______| Time Stamp(0013 . 460 693 632 s)
> _______|_______________________________________________________________________
> Packet(178028) Upstream 2.5(x1) TLP(1486) Msg Msg(01:10000)
> _______| Msg Routing(To RC) Length(0) RequesterID(003:00:0) Tag(31)
> _______| Message Code(ERR_FATAL) LCRC(0x41499062)
> _______| Time Stamp(0013 . 460 693 792 s)
> _______|_______________________________________________________________________
> Packet(178029) Downstream 2.5(x1) DLLP ACK AckNak_Seq_Num(1486)
> _______| CRC 16(0x231F) Time Stamp(0013 . 460 694 704 s)
> _______|_______________________________________________________________________
>
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