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Re: [Xen-devel] [VT-D]iommu.c:775: iommu_page_fault: iommu->reg =ffff828

Subject: Re: [Xen-devel] [VT-D]iommu.c:775: iommu_page_fault: iommu->reg =ffff828bfff57000
From: Stefan Bauer <stefan.bauer@xxxxxxxxxxx>
Date: Tue, 28 Oct 2008 20:41:59 +0100
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Ross Philipson schrieb:
> So the trace below is showing a failure during Xen boot and later you
> have trouble passing through a graphics card to an HVM? Do you get
> subsequent errors when starting the HVM? What is device 00:2.0 that is
> causing the fault below? Reason 5 indicates a DMA write to a page where
> the IOMMU PTE W bit is clear to disallow DMA writes.

Hi Ross,

the error after trying to start the hvm guest by xm create win2k is:

VmError: fail to assign device(1:0.0): maybe it has already been
assigned to other domain, or maybe it doesn't exist.
[2008-10-25 19:59:30 2460] DEBUG (__init__:1072)
XendDomainInfo.destroy: domid=5
[2008-10-25 19:59:30 2460] DEBUG (__init__:1072)
XendDomainInfo.destroyDomain(5)
[2008-10-25 19:59:30 2460] DEBUG (__init__:1072) No device model
[2008-10-25 19:59:30 2460] DEBUG (__init__:1072) Releasing devices
[2008-10-25 19:59:30 2460] ERROR (__init__:1072) Domain construction
failed
Traceback (most recent call last):
  File "//usr/lib64/python/xen/xend/XendDomainInfo.py", line 92, in create
    vm.start()
  File "//usr/lib64/python/xen/xend/XendDomainInfo.py", line 424, in start
    XendTask.log_progress(0, 30, self._constructDomain)
  File "//usr/lib64/python/xen/xend/XendTask.py", line 209, in
log_progress
    retval = func(*args, **kwds)
  File "//usr/lib64/python/xen/xend/XendDomainInfo.py", line 2103, in
_constructDomain
    raise VmError("fail to assign device(%x:%x.%x): maybe it has"
VmError: fail to assign device(1:0.0): maybe it has already been
assigned to other domain, or maybe it doesn't exist.

I also noticed that lspci did not show the graphiccard anymore after i
use the boot option iommu in combination with vtd. Might be caused by
that initial error.

I have to admit that lspci did not show device 00:2.0. that looks
strange to me.

please see attached the output of lspci -vv

Thanks in advance

-- 
stefan

00:00.0 Host bridge: Intel Corporation Unknown device 29b0 (rev 02)
        Subsystem: Lenovo Unknown device 3037
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort+ >SERR- <PERR-
        Latency: 0
        Capabilities: [e0] Vendor Specific Information

00:01.0 PCI bridge: Intel Corporation Unknown device 29b1 (rev 02) (prog-if 00 
[Normal decode])
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
        Latency: 0, Cache Line Size: 32 bytes
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        I/O behind bridge: 00002000-00002fff
        Memory behind bridge: d0000000-d2ffffff
        Prefetchable memory behind bridge: 00000000c0000000-00000000cfffffff
        Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- <SERR- <PERR-
        BridgeCtl: Parity- SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B-
        Capabilities: [88] Subsystem: Lenovo Unknown device 3037
        Capabilities: [80] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [90] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 
Enable-
                Address: 00000000  Data: 0000
        Capabilities: [a0] Express Root Port (Slot+) IRQ 0
                Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag-
                Device: Latency L0s <64ns, L1 <1us
                Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported-
                Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
                Device: MaxPayload 128 bytes, MaxReadReq 128 bytes
                Link: Supported Speed 2.5Gb/s, Width x16, ASPM L0s L1, Port 2
                Link: Latency L0s <256ns, L1 <4us
                Link: ASPM Disabled RCB 64 bytes CommClk+ ExtSynch-
                Link: Speed 2.5Gb/s, Width x16
                Slot: AtnBtn- PwrCtrl- MRL- AtnInd- PwrInd- HotPlug- Surpise-
                Slot: Number 4096, PowerLimit 75.000000
                Slot: Enabled AtnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq-
                Slot: AttnInd Off, PwrInd On, Power-
                Root: Correctable- Non-Fatal- Fatal- PME-

00:03.0 Communication controller: Intel Corporation Unknown device 29b4 (rev 02)
        Subsystem: Lenovo Unknown device 3037
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at d3326000 (64-bit, non-prefetchable) [size=16]
        Capabilities: [50] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [8c] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 
Enable-
                Address: 0000000000000000  Data: 0000

00:03.2 IDE interface: Intel Corporation Unknown device 29b6 (rev 02) (prog-if 
85 [Master SecO PriO])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin C routed to IRQ 18
        Region 0: I/O ports at 1c80 [disabled] [size=8]
        Region 1: I/O ports at 1c74 [disabled] [size=4]
        Region 2: I/O ports at 1c78 [disabled] [size=8]
        Region 3: I/O ports at 1c70 [disabled] [size=4]
        Region 4: I/O ports at 1c20 [disabled] [size=16]
        Capabilities: [c8] Power Management version 3
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 
Enable-
                Address: 0000000000000000  Data: 0000

00:03.3 Serial controller: Intel Corporation Unknown device 29b7 (rev 02) 
(prog-if 02 [16550])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin B routed to IRQ 17
        Region 0: I/O ports at 1c88 [size=8]
        Region 1: Memory at d3324000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [c8] Power Management version 3
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 
Enable-
                Address: 0000000000000000  Data: 0000

00:19.0 Ethernet controller: Intel Corporation Unknown device 10bd (rev 02)
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at d3300000 (32-bit, non-prefetchable) [size=128K]
        Region 1: Memory at d3325000 (32-bit, non-prefetchable) [size=4K]
        Region 2: I/O ports at 1820 [size=32]
        Capabilities: [c8] Power Management version 2
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=1 PME-
        Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 
Enable-
                Address: 0000000000000000  Data: 0000
        Capabilities: [e0] #13 [0306]

00:1a.0 USB Controller: Intel Corporation Unknown device 2937 (rev 02) (prog-if 
00 [UHCI])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin A routed to IRQ 16
        Region 4: I/O ports at 1840 [size=32]
        Capabilities: [50] #13 [0306]

00:1a.1 USB Controller: Intel Corporation Unknown device 2938 (rev 02) (prog-if 
00 [UHCI])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin B routed to IRQ 17
        Region 4: I/O ports at 1860 [size=32]
        Capabilities: [50] #13 [0306]

00:1a.2 USB Controller: Intel Corporation Unknown device 2939 (rev 02) (prog-if 
00 [UHCI])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin C routed to IRQ 18
        Region 4: I/O ports at 1880 [size=32]
        Capabilities: [50] #13 [0306]

00:1a.7 USB Controller: Intel Corporation Unknown device 293c (rev 02) (prog-if 
20 [EHCI])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin C routed to IRQ 18
        Region 0: Memory at d3326800 (32-bit, non-prefetchable) [size=1K]
        Capabilities: [50] 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: [58] Debug port
        Capabilities: [98] #13 [0306]

00:1b.0 Audio device: Intel Corporation Unknown device 293e (rev 02)
        Subsystem: Lenovo Unknown device 3037
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
        Latency: 0, Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at d3320000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA 
PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 
Enable-
                Address: 0000000000000000  Data: 0000
        Capabilities: [70] Express Unknown type IRQ 0
                Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag-
                Device: Latency L0s <64ns, L1 <1us
                Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported-
                Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
                Device: MaxPayload 128 bytes, MaxReadReq 128 bytes
                Link: Supported Speed unknown, Width x0, ASPM unknown, Port 0
                Link: Latency L0s <64ns, L1 <1us
                Link: ASPM Disabled CommClk- ExtSynch-
                Link: Speed unknown, Width x0

00:1d.0 USB Controller: Intel Corporation Unknown device 2934 (rev 02) (prog-if 
00 [UHCI])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin A routed to IRQ 16
        Region 4: I/O ports at 18a0 [size=32]
        Capabilities: [50] #13 [0306]

00:1d.1 USB Controller: Intel Corporation Unknown device 2935 (rev 02) (prog-if 
00 [UHCI])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin B routed to IRQ 17
        Region 4: I/O ports at 18c0 [size=32]
        Capabilities: [50] #13 [0306]

00:1d.2 USB Controller: Intel Corporation Unknown device 2936 (rev 02) (prog-if 
00 [UHCI])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin C routed to IRQ 18
        Region 4: I/O ports at 18e0 [size=32]
        Capabilities: [50] #13 [0306]

00:1d.7 USB Controller: Intel Corporation Unknown device 293a (rev 02) (prog-if 
20 [EHCI])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at d3326c00 (32-bit, non-prefetchable) [size=1K]
        Capabilities: [50] 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: [58] Debug port
        Capabilities: [98] #13 [0306]

00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92) (prog-if 01 
[Subtractive decode])
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
        Latency: 0
        Bus: primary=00, secondary=11, subordinate=11, sec-latency=32
        Memory behind bridge: d3000000-d30fffff
        Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort+ <SERR- <PERR-
        BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-
        Capabilities: [50] Subsystem: Lenovo Unknown device 3037

00:1f.0 ISA bridge: Intel Corporation Unknown device 2914 (rev 02)
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Capabilities: [e0] Vendor Specific Information

00:1f.2 IDE interface: Intel Corporation Unknown device 2920 (rev 02) (prog-if 
8a [Master SecP PriP])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin B routed to IRQ 17
        Region 0: I/O ports at <unassigned>
        Region 1: I/O ports at <unassigned>
        Region 2: I/O ports at <unassigned>
        Region 3: I/O ports at <unassigned>
        Region 4: I/O ports at 1c40 [size=16]
        Region 5: I/O ports at 1c30 [size=16]
        Capabilities: [70] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [b0] #13 [0306]

00:1f.3 SMBus: Intel Corporation Unknown device 2930 (rev 02)
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Interrupt: pin B routed to IRQ 17
        Region 0: Memory at d3327000 (64-bit, non-prefetchable) [disabled] 
[size=256]
        Region 4: I/O ports at 1c00 [size=32]

00:1f.5 IDE interface: Intel Corporation Unknown device 2926 (rev 02) (prog-if 
85 [Master SecO PriO])
        Subsystem: Lenovo Unknown device 3037
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin C routed to IRQ 18
        Region 0: I/O ports at 1cb8 [size=8]
        Region 1: I/O ports at 1cac [size=4]
        Region 2: I/O ports at 1cb0 [size=8]
        Region 3: I/O ports at 1ca8 [size=4]
        Region 4: I/O ports at 1c60 [size=16]
        Region 5: I/O ports at 1c50 [size=16]
        Capabilities: [70] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [b0] #13 [0306]

01:00.0 VGA compatible controller: nVidia Corporation Unknown device 0402 (rev 
a1) (prog-if 00 [VGA])
        Subsystem: ASUSTeK Computer Inc. Unknown device 8243
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
        Latency: 0, Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at d2000000 (32-bit, non-prefetchable) [size=16M]
        Region 1: Memory at c0000000 (64-bit, prefetchable) [size=256M]
        Region 3: Memory at d0000000 (64-bit, non-prefetchable) [size=32M]
        Region 5: I/O ports at 2000 [size=128]
        Capabilities: [60] 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-
        Capabilities: [68] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 
Enable-
                Address: 0000000000000000  Data: 0000
        Capabilities: [78] Express Endpoint IRQ 0
                Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag+
                Device: Latency L0s <512ns, L1 <4us
                Device: AtnBtn- AtnInd- PwrInd-
                Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported-
                Device: RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+
                Device: MaxPayload 128 bytes, MaxReadReq 512 bytes
                Link: Supported Speed 2.5Gb/s, Width x16, ASPM L0s L1, Port 0
                Link: Latency L0s <512ns, L1 <4us
                Link: ASPM Disabled RCB 128 bytes CommClk+ ExtSynch-
                Link: Speed 2.5Gb/s, Width x16

11:0c.0 Ethernet controller: Atheros Communications, Inc. AR5005G 802.11abg NIC 
(rev 01)
        Subsystem: Atheros Communications, Inc. Unknown device 2052
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- 
Stepping- SERR+ FastB2B+
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 168 (2500ns min, 7000ns max), Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 20
        Region 0: Memory at d3000000 (32-bit, non-prefetchable) [size=64K]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=2 PME-

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