Re: Suspending and resuming a single PCI device (and bridge)

From: Justin Mattock
Date: Fri Apr 04 2008 - 10:52:18 EST

You're welcome, hopefully you dont have that irritating FIFO blowout.

Justin P. Mattock

2008/4/4 Maciej Żenczykowski <Maciej.Zenczykowski@xxxxxxxxxxxxx>:
> On Fri, 4 Apr 2008, Justin Mattock wrote:
>
>
> > Hello; I noticed this with the macbook pro ati chipset as well(FIFO
> > thing), you probably read somewhere but if you didn't try
> > iwpriv ath0 bgscan 0, and put that in /etc/rc.local for starting up.
> > hope this solves the problem with ath0, also I notice with 2.6.25-rc1
> >
>
> Ok, I hadn't tried this before - because it didn't work - figured out the
> problem was an x86_64 kernel with i386 wireless-tools utilities (so
> reinstalled the 64-bit utilities).
> Now, it works, we'll see if it helps.
>
>
> > this happend quite a bit with the new madwifi, but using
> > madwifi-dfs-r3221-20080119 seems to not produce that kind of problem.
> > Hopefully this helps you out. (if this problem is more than above then
> > hopefully somebody else has the answer for you.)
> > regards;
> > Justin P. Mattock
> >
> >
>
> I've been using madwifi-3421 (and various other versions before that) on an
> smp 64-bit kernel.
>
> I'm assuming the -dfs shouldn't affect this? Anyway, if the bgscan doesn't
> help I'll try the specific version you pointed out.
>
> Thanks,
> Maciej
>
>
> > On Fri, Apr 4, 2008 at 12:13 AM, Maciej Żenczykowski <maze@xxxxxxxxxxxxx>
> wrote:
> >
> > > I've got a wireless card (atheros 5418 on a MacBookPro3,1) which is
> > > (kind-of) supported by the madwifi driver (from head), however
> > > occasionally it gets stuck (long outstanding bug with lots of
> > > comments, but no fixes) - I've noticed that a suspend to ram and
> > > resume (almost?) always fixes the problem.
> > >
> > > Thus, I'm wondering if there is a way to cause a pci device (and
> > > possibly the pci bridge/port it's connected to) to suspend/resume
> > > manually (or naturally, any other solution to the problem)...
> > >
> > > The hardware in question:
> > >
> > > # lspci -t | egrep 0b; lspci -vvnn -s 00:1c.4; lspci -vvnn -s 0b:00.0
> > >
> > > +-1c.4-[0000:0b]----00.0
> > >
> > > 00:1c.4 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI
> > > Express Port 5 [8086:2847] (rev 03) (prog-if 00 [Normal decode])
> > > 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: 256 bytes
> > > Bus: primary=00, secondary=0b, subordinate=0b, sec-latency=0
> > > Memory behind bridge: d7300000-d73fffff
> > > Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort-
> > > <TAbort- <MAbort- <SERR- <PERR-
> > > BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
> > > PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
> > > Capabilities: [40] Express (v1) Root Port (Slot+), MSI 00
> > > DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s
> > > unlimited, L1 unlimited
> > > ExtTag- RBE+ FLReset-
> > > DevCtl: Report errors: Correctable- Non-Fatal- Fatal-
> > > Unsupported-
> > > RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
> > > MaxPayload 128 bytes, MaxReadReq 128 bytes
> > > DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq-
> > > AuxPwr+ TransPend-
> > > LnkCap: Port #5, Speed 2.5GT/s, Width x1, ASPM L0s L1,
> > > Latency L0 <256ns, L1 <4us
> > > ClockPM- Suprise- LLActRep+ BwNot-
> > > LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled-
> > > Retrain- CommClk+
> > > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> > > LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train-
> > > SlotClk+ DLActive+ BWMgmt- ABWMgmt-
> > > SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd-
> > > HotPlug+ Surpise+
> > > Slot # 4, PowerLimit 6.500000; Interlock-
> NoCompl-
> > > SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet-
> > > CmdCplt- HPIrq- LinkChg-
> > > Control: AttnInd Unknown, PwrInd Unknown,
> > > Power- Interlock-
> > > SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt-
> > > PresDet+ Interlock-
> > > Changed: MRL- PresDet+ LinkState+
> > > RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal-
> > > PMEIntEna- CRSVisible-
> > > RootCap: CRSVisible-
> > > RootSta: PME ReqID 0000, PMEStatus- PMEPending-
> > > Capabilities: [80] Message Signalled Interrupts: Mask- 64bit-
> > > Queue=0/0 Enable-
> > > Address: fee0300c Data: 4179
> > > Capabilities: [90] Subsystem: Gammagraphx, Inc. Unknown device
> > > [0000:0000]
> > > Capabilities: [a0] Power Management version 2
> > > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
> > > PME(D0+,D1-,D2-,D3hot+,D3cold+)
> > > Status: D0 PME-Enable- DSel=0 DScale=0 PME-
> > > Kernel driver in use: pcieport-driver
> > > Kernel modules: shpchp
> > >
> > > 0b:00.0 Network controller [0280]: Atheros Communications, Inc. AR5418
> > > 802.11abgn Wireless PCI Express Adapter [168c:0024] (rev 01)
> > > Subsystem: Apple Computer Inc. Unknown device [106b:0087]
> > > 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: 256 bytes
> > > Interrupt: pin A routed to IRQ 16
> > > Region 0: Memory at d7300000 (64-bit, non-prefetchable)
> [size=64K]
> > > Capabilities: [40] Power Management version 2
> > > Flags: PMEClk- DSI- D1+ D2- AuxCurrent=375mA
> > > PME(D0+,D1+,D2-,D3hot+,D3cold-)
> > > Status: D0 PME-Enable- DSel=0 DScale=0 PME-
> > > Capabilities: [50] Message Signalled Interrupts: Mask- 64bit-
> > > Queue=0/0 Enable-
> > > Address: 00000000 Data: 0000
> > > Capabilities: [60] Express (v1) Legacy Endpoint, MSI 00
> > > DevCap: MaxPayload 128 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 512 bytes
> > > DevSta: CorrErr- UncorrErr+ FatalErr- UnsuppReq+
> > > AuxPwr- TransPend-
> > > LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1,
> > > Latency L0 <512ns, L1 <64us
> > > ClockPM- Suprise- LLActRep- BwNot-
> > > LnkCtl: ASPM L1 Enabled; RCB 128 bytes Disabled-
> > > Retrain- CommClk+
> > > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> > > LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train-
> > > SlotClk+ DLActive- BWMgmt- ABWMgmt-
> > > Capabilities: [90] MSI-X: Enable- Mask- TabSize=1
> > > Vector table: BAR=0 offset=00000000
> > > PBA: BAR=0 offset=00000000
> > > Kernel driver in use: ath_pci
> > > Kernel modules: ath5k, ath_pci
> > >
> > > When the problem happens, the kernel driver reports:
> > > kernel: wifi0: ath_rxorn_tasklet: Receive FIFO overrun; resetting.
> > > kernel:last message repeated 92 times
> > >
> > > I've noticed this seems to be correlated to <MAbort+ being asserted on
> > > the pci port (00:1c.4) and on the device itself (0b:00.0) - thus I
> > > think the above message is more of a symptom, than an actual
> > > problem...
> > >
> > > Does anyone have any ideas (for example how [else] to clear MAbort)?
> > >
> > > This is on kernel 2.6.24.4-74.fc8 from koji for fedora core 8 (also
> > > present on 2.6.24.3-*.fc8), but people have reported issues on pretty
> > > much everything (ubuntu, etc), any desired futher information
> > > available by request...
> > >
> > > Not currently subscribed so please keep me CC'ed.
> > >
> > > Thanks,
> > > Maciej
> > > --
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> > >
> > >
> >
> >
> >
> > --
> > Justin P. Mattock
>



--
Justin P. Mattock
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