Dear all,
I have a dual Asix Electronics Corporation (Wrong ID) MCS9922 PCIe
Multi-I/O Controller card, with 2 serial ports and some GPIOs since a
long time. I've tried different drivers & kernel from time to time, with
the hope that the drivers will be fixed one day, but with no luck.
Long time ago, I've tried the Asix drivers, but they were always ending
in some kernel Oops, so I gave up with them as they were rather old. So
I go back to the mainstream serial drivers. But unfortunately they still
don't work in my case.
I'm running a Debian 5.10.113-1 kernel but some remarks below are valid
since 3.X linux kernel (at least).
First (new) things seems to be related to the IOMMU DMA R/W protection,
as I've got this kind of messages in dmesg, when trying to use stty -F
on associated tty:
DMAR: DRHD: handling fault status reg 2
DMAR: [DMA Write] Request device [03:00.0] PASID ffffffff fault addr 0
[fault reason 05] PTE Write access is not set
Digging around, it looks like this is probably linked to the lack of
pci_map_* calls, but I'm a total newbie with X86 PCI/DMA architecture
and I'm probably totaly wrong.
Second is this kind of messages:
__common_interrupt: 5.33 No irq handler for vector
__common_interrupt: 6.33 No irq handler for vector
When trying to play with the cards. Ending most of the time with :
Mar 29 23:34:23 blhc kernel: [25287447.821957] irq 16: nobody cared (try
booting with the "irqpoll" option)
Mar 29 23:34:23 blhc kernel: [25287447.821966] CPU: 0 PID: 0 Comm:
swapper/0 Tainted: G W OE 5.10.0-14-amd64 #1 Debian 5.10.113-1
Mar 29 23:34:23 blhc kernel: [25287447.821968] Hardware name: ASUS All
Series/Z97-E, BIOS XXXX XX/XX/XXXX
Mar 29 23:34:23 blhc kernel: [25287447.821969] Call Trace:
Mar 29 23:34:23 blhc kernel: [25287447.821972] <IRQ>
Mar 29 23:34:23 blhc kernel: [25287447.821980] dump_stack+0x6b/0x83
Mar 29 23:34:23 blhc kernel: [25287447.821984] __report_bad_irq+0x35/0xa7
Mar 29 23:34:23 blhc kernel: [25287447.821987] note_interrupt.cold+0xb/0x61
Mar 29 23:34:23 blhc kernel: [25287447.821992] handle_irq_event+0xa8/0xb0
Mar 29 23:34:23 blhc kernel: [25287447.821995]
handle_fasteoi_irq+0x78/0x1c0
Mar 29 23:34:23 blhc kernel: [25287447.822000]
asm_call_irq_on_stack+0x12/0x20
Mar 29 23:34:23 blhc kernel: [25287447.822002] </IRQ>
Mar 29 23:34:23 blhc kernel: [25287447.822007] common_interrupt+0xb0/0x130
Mar 29 23:34:23 blhc kernel: [25287447.822010]
asm_common_interrupt+0x1e/0x40
Mar 29 23:34:23 blhc kernel: [25287447.822014] RIP:
0010:cpuidle_enter_state+0xc7/0x350
Mar 29 23:34:23 blhc kernel: [25287447.822017] Code: 8b 3d ed 17 77 77
e8 f8 cc a1 ff 49 89 c5 0f 1f 44 00 00 31 ff e8 09 d8 a1 ff 45 84 ff 0f
85 fa 00 00 00 fb 66 0f 1f 44 00 00 <45> 85 f6 0f 88 06 01 00 00 49 63
c6 4c 2b 2c 24 48 8d 14 40 48 8d
Mar 29 23:34:23 blhc kernel: [25287447.822020] RSP:
0018:ffffffff89803e70 EFLAGS: 00000246
Mar 29 23:34:23 blhc kernel: [25287447.822023] RAX: ffff889e9fe2fcc0
RBX: 0000000000000005 RCX: 000000000000001f
Mar 29 23:34:23 blhc kernel: [25287447.822025] RDX: 0000000000000000
RSI: 000000002000029f RDI: 0000000000000000
Mar 29 23:34:23 blhc kernel: [25287447.822026] RBP: ffff889e9fe39c00
R08: 0059d6ccc0b42569 R09: 0059d6a819e269af
Mar 29 23:34:23 blhc kernel: [25287447.822028] R10: 0000000000000001
R11: 0000000000000001 R12: ffffffff899ae780
Mar 29 23:34:23 blhc kernel: [25287447.822029] R13: 0059d6ccc0b42569
R14: 0000000000000005 R15: 0000000000000000
Mar 29 23:34:23 blhc kernel: [25287447.822035] cpuidle_enter+0x29/0x40
Mar 29 23:34:23 blhc kernel: [25287447.822040] do_idle+0x1ef/0x2b0
Mar 29 23:34:23 blhc kernel: [25287447.822044] cpu_startup_entry+0x19/0x20
Mar 29 23:34:23 blhc kernel: [25287447.822049] start_kernel+0x587/0x5a8
Mar 29 23:34:23 blhc kernel: [25287447.822054]
secondary_startup_64_no_verify+0xb0/0xbb
Mar 29 23:34:23 blhc kernel: [25287447.822057] handlers:
Mar 29 23:34:23 blhc kernel: [25287447.822076] [<00000000bd5696c1>]
usb_hcd_irq [usbcore]
Mar 29 23:34:23 blhc kernel: [25287447.822079] Disabling IRQ #16
Mar 29 23:42:30 blhc kernel: [25287935.482980] serial 0000:03:00.0: LSR
safety check engaged!
Of course, IRQ 16 is a shared IRQ with some USB controllers, and this is
sometimes annoying, but (at least in last kernels) not deadfull.
I would be happy to help to fix these cases, as far as I can. I can even
try to fix myself some little things if you can pinpoint me were to look
at and what kind of thing is the way to go. As a bonus I would like to
add the support to the associated GPIOs, but I'm not sure on "what would
be the best way to do it".
Here's the current lspci -vvv (I've moved them under the vfio-pci to try
to play with them with qmeu/kvm to avoid to hard lock my Pc):
03:00.0 Serial controller: MosChip Semiconductor Technology Ltd. MCS9922
PCIe Multi-I/O Controller (prog-if 02 [16550])
Subsystem: Asix Electronics Corporation (Wrong ID) MCS9922 PCIe
Multi-I/O Controller
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 16
IOMMU group: 13
Region 0: I/O ports at d010 [virtual] [size=8]
Region 1: Memory at f7803000 (32-bit, non-prefetchable)
[virtual] [size=4K]
Region 5: Memory at f7802000 (32-bit, non-prefetchable)
[virtual] [size=4K]
Capabilities: [50] MSI: Enable- Count=1/8 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [78] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA
PME(D0-,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [80] Express (v1) Legacy Endpoint, MSI 00
DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s
<1us, L1 <2us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq-
RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
MaxPayload 128 bytes, MaxReadReq 512 bytes
DevSta: CorrErr+ NonFatalErr- FatalErr- UnsupReq-
AuxPwr- TransPend-
LnkCap: Port #1, Speed 2.5GT/s, Width x1, ASPM L0s L1,
Exit Latency L0s <64ns, L1 unlimited
ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp-
LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk-
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s (ok), Width x1 (ok)
TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
Capabilities: [100 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-
VC1: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128-
WRR256-
Ctrl: Enable- ID=0 ArbSelect=Fixed TC/VC=00
Status: NegoPending- InProgress-
Capabilities: [800 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+
AdvNonFatalErr-
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout-
AdvNonFatalErr+
AERCap: First Error Pointer: 00, ECRCGenCap- ECRCGenEn-
ECRCChkCap- ECRCChkEn-
MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
HeaderLog: 00000000 00000000 00000000 00000000
Kernel driver in use: vfio-pci
03:00.1 Serial controller: MosChip Semiconductor Technology Ltd. MCS9922
PCIe Multi-I/O Controller (prog-if 02 [16550])
Subsystem: Asix Electronics Corporation (Wrong ID) MCS9922 PCIe
Multi-I/O Controller
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 B routed to IRQ 17
IOMMU group: 13
Region 0: I/O ports at d000 [virtual] [size=8]
Region 1: Memory at f7801000 (32-bit, non-prefetchable)
[virtual] [size=4K]
Region 5: Memory at f7800000 (32-bit, non-prefetchable)
[virtual] [size=4K]
Capabilities: [50] MSI: Enable- Count=1/8 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [78] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA
PME(D0-,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [80] Express (v1) Legacy Endpoint, MSI 00
DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s
<1us, L1 <2us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq-
RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
MaxPayload 128 bytes, MaxReadReq 512 bytes
DevSta: CorrErr+ NonFatalErr- FatalErr- UnsupReq-
AuxPwr- TransPend-
LnkCap: Port #1, Speed 2.5GT/s, Width x1, ASPM L0s L1,
Exit Latency L0s <64ns, L1 unlimited
ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp-
LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk-
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s (ok), Width x1 (ok)
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+
AdvNonFatalErr-
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout-
AdvNonFatalErr+
AERCap: First Error Pointer: 00, ECRCGenCap- ECRCGenEn-
ECRCChkCap- ECRCChkEn-
MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
HeaderLog: 00000000 00000000 00000000 00000000
Kernel driver in use: vfio-pci
Please keep me in copy as I'm not (yet) a subscriber to the list.
Thanks for your help,
Best regards,
Caeies.
