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Date: Mon, 7 Jan 2019 14:04:17 +0800
From: Kai Heng Feng <kai.heng.feng@...onical.com>
To: Siva Reddy Kallam <siva.kallam@...adcom.com>,
Prashant Sreedharan <prashant@...adcom.com>,
Michael Chan <mchan@...adcom.com>
Cc: Linux Netdev List <netdev@...r.kernel.org>,
Chih-Hsyuan Ho <chih.ho@...onical.com>
Subject: Re: Latitude 5495's tg3 hangs under heavy load
Hi tg3 folks,
Any idea how to solve the bug?
Kai-Heng
> On Dec 7, 2018, at 17:27, Kai Heng Feng <kai.heng.feng@...onical.com> wrote:
>
> Hi tg3 maintainers,
>
> I’ve encountered network freeze when using tg3 in gigabits net.
>
> The issue can be easily reproduced when using scp to transfer files in local network.
>
> The symptom is pretty similar to what this commit is trying to solve:
> commit 3a498606bb04af603a46ebde8296040b2de350d1
> Author: Sanjeev Bansal <sanjeevb.bansal@...adcom.com>
> Date: Mon Jul 16 11:13:32 2018 +0530
>
> tg3: Add higher cpu clock for 5762.
>
> This patch has fix for TX timeout while running bi-directional
> traffic with 100 Mbps using 5762.
>
> But reverting this commit doesn’t help.
>
> Latitude 5495 is a AMD Raven Ridge platform, not sure if this matters.
>
> Here’s the lspci for this device:
> 03:00.0 Ethernet controller [0200]: Broadcom Inc. and subsidiaries NetXtreme BCM5762 Gigabit Ethernet PCIe [14e4:1687] (rev 10)
> Subsystem: Dell NetXtreme BCM5762 Gigabit Ethernet PCIe [1028:0814]
> 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
> Interrupt: pin A routed to IRQ 16
> Region 0: Memory at e0220000 (64-bit, prefetchable) [size=64K]
> Region 2: Memory at e0210000 (64-bit, prefetchable) [size=64K]
> Region 4: Memory at e0200000 (64-bit, prefetchable) [size=64K]
> Capabilities: [48] Power Management version 3
> Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
> Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=1 PME-
> Capabilities: [50] Vital Product Data
> Product Name: Broadcom NetXtreme Gigabit Ethernet Controller
> Read-only fields:
> [PN] Part number: BCM95762
> [EC] Engineering changes: 106679-15
> [SN] Serial number: 0123456789
> [MN] Manufacture ID: 31 34 65 34
> [RV] Reserved: checksum good, 28 byte(s) reserved
> Read/write fields:
> [YA] Asset tag: XYZ01234567
> [RW] Read-write area: 107 byte(s) free
> End
> Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
> Address: 0000000000000000 Data: 0000
> Capabilities: [a0] MSI-X: Enable+ Count=6 Masked-
> Vector table: BAR=4 offset=00000000
> PBA: BAR=2 offset=00000120
> Capabilities: [ac] Express (v2) Endpoint, MSI 00
> DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <4us, L1 <64us
> ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ SlotPowerLimit 0.000W
> DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
> RlxdOrd- ExtTag- PhantFunc- AuxPwr+ NoSnoop- FLReset-
> MaxPayload 128 bytes, MaxReadReq 4096 bytes
> DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
> LnkCap: Port #0, Speed 5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <2us, L1 <64us
> ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
> LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
> ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
> LnkSta: Speed 5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
> DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR+, OBFF Via WAKE#
> DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR+, OBFF Disabled
> LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-
> Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
> Compliance De-emphasis: -6dB
> LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1-
> EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
> 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: 00, GenCap+ CGenEn- ChkCap+ ChkEn-
> Capabilities: [13c v1] Device Serial Number 00-00-a4-4c-c8-5b-65-74
> Capabilities: [150 v1] Power Budgeting <?>
> Capabilities: [160 v1] Virtual Channel
> Caps: LPEVC=0 RefClk=100ns PATEntryBits=1
> Arb: Fixed- WRR32- WRR64- WRR128-
> Ctrl: ArbSelect=Fixed
> Status: InProgress-
> VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
> Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
> Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
> Status: NegoPending- InProgress-
> Capabilities: [1b0 v1] Latency Tolerance Reporting
> Max snoop latency: 1048576ns
> Max no snoop latency: 1048576ns
> Capabilities: [230 v1] Transaction Processing Hints
> Interrupt vector mode supported
> Steering table in MSI-X table
> Kernel driver in use: tg3
> Kernel modules: tg3
>
> Please let me know if you need more information.
>
> Kai-Heng
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