> Testing with an ASM1062 PCIe to SATA mini-PCIe card on Armada 388.
> PCIe capability at 0x80, DevCtl at 0x88, DevSta at 0x8a.
>
> Before:
> /# setpci -s 1:0.0 0x88.l - DevSta: CorrErr+
> 00012810
> /# setpci -s 1:0.0 0x88.w=0x2810 - Write DevCtl only
> /# setpci -s 1:0.0 0x88.l - CorrErr cleared - FAIL
> 00002810
>
> After:
> /# setpci -s 1:0.0 0x88.l - DevSta: CorrErr+
> 00012810
> /# setpci -s 1:0.0 0x88.w=0x2810 - check DevCtl only write
> /# setpci -s 1:0.0 0x88.l - CorErr remains set
> 00012810
> /# setpci -s 1:0.0 0x88.w=0x281f - check DevCtl write works
> /# setpci -s 1:0.0 0x88.l - devctl field updated
> 0001281f
> /# setpci -s 1:0.0 0x8a.w=0xffff - clear DevSta
> /# setpci -s 1:0.0 0x88.l - CorrErr now cleared
> 0000281f
> /# setpci -s 1:0.0 0x88.w=0x2810 - restore DevCtl
> /# setpci -s 1:0.0 0x88.l - check
> 00002810
Hi Russell
Can you give me some hints how to test this in my Kirkwood board.
root@dir665:~# lspci -nvvvv
00:01.0 0604: 11ab:6281 (rev 02) (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-
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00010000-00010fff
Memory behind bridge: e0000000-e00fffff
Prefetchable memory behind bridge: 00000000-000fffff
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
01:00.0 0200: 11ab:2a40
Subsystem: 11ab:2a40
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-
Interrupt: pin A routed to IRQ 83
Region 0: Memory at e0000000 (64-bit, non-prefetchable) [disabled] [size=64K]
Region 2: Memory at e0010000 (64-bit, non-prefetchable) [disabled] [size=64K]
Capabilities: [40] 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: [5c] MSI: Enable- Count=1/1 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [e0] Express (v1) Legacy Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited
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, Exit Latency L0s unlimited, L1 unlimited
ClockPM+ Surprise- LLActRep- BwNot-
LnkCtl: ASPM Disabled; RCB 128 bytes Disabled- CommClk-
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1, 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: 1f, GenCap- CGenEn- ChkCap- ChkEn-
Capabilities: [130 v1] Device Serial Number 00-00-00-00-00-00-00-00
root@dir665:~# setpci -s 1:0.0 0x88.l
00000000
Nothing there, so your test does not work directly.
I tried
root@dir665:~# setpci -s 1:0.0 0xe8.l
00102000
root@dir665:~# setpci -s 1:0.0 0xe8.w=0x2000
root@dir665:~# setpci -s 1:0.0 0xe8.l
00102000
but that is not producing the FAIL you had.
Thanks
Andrew
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