I am reposting this msg in kernel-newbie list hoping to get some help.
I am not sure if the linux-pci and other topic specific lists are meant mostly for patches and this list is for questions ?
Hi All,
Scenario 1:
I am seeing BAR 0 assignment issue for one of the devices (Device A) downstream to pcie switch when i insert (hotplug) the card (with the plx switch and devices on it) after linux boots and enter the command prompt. However BAR 0 is assigned successfully to a different device (Device B) on different port of the same pcie switch.
Scenario 2:
In contrast, when i plug the card in the system first and power on, all the devices downstream to the pcie switch are allocated BAR 0.
Questions:
1. How can i get pci/pciehp to assign memory/BAR 0 to Device A (45:00.x) in Scenario 1.
2. Can this be caused by wrong config space settings for Device A ? If yes which register/field i should be looking at ?
3. How is the memory address assigned for Device B ( 44:00.x) change between Scenario 1 and scenario 2.
It would be of great help if someone can point out what am i missing, or how i can solve this. Without solving Question 1, i am not able to successfully enable the device driver for Device A in the hotplug situation, where the error will be something like "can't enable device: BAR 0 [] not claimed "
Thanks
Divakar
Sorry for removing some of the company information from the device details as the product is still under development.Currently running 3.19 ( linux yocto ). Also tried on 4.4.16 ( linux yocto ). Below log is from running 4.4.16 kernel
Scenario 1: HOTPLUG ( Insert the card after power on + linux booted )
BEFORE card Inserted
\-[0000:00]-+-00.0
+-01.0-[01-26]----00.0-[02-26]--+-09.0-[03-0b]--
| +-0a.0-[0c-14]--
| +-0b.0-[15-1d]--
| \-0c.0-[1e-26]--
+-02.0-[27]--+-00.0
| +-00.1
| +-00.2
| \-00.3
+-02.2-[28-2a]--+-00.0
| \-00.1
+-03.0-[2b]--
+-03.1-[2c]--+-00.0
| +-00.1
| +-00.2
| \-00.3
+-03.2-[2d-52]--+-00.0-[2e-52]--+-01.0-[2f-37]--
| | +-02.0-[38-40]--
| | +-03.0-[41-49]--
| | \-04.0-[4a-52]--
| +-00.1
| +-00.2
| +-00.3
| \-00.4
+-05.0
+-05.1
+-05.2
+-05.4
+-14.0
+-1a.0
Hot plug enabled for port of pcie switch where cards can be inserted.
dmesg | grep pciehp
[ 6.851607] pciehp 0000:02:09.0:pcie24: Slot #9 AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl- LLActRep-
[ 6.863882] pciehp 0000:02:09.0:pcie24: service driver pciehp loaded
[ 6.863888] pciehp 0000:02:0a.0:pcie24: Slot #10 AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl- LLActRep-
[ 6.876262] pciehp 0000:02:0a.0:pcie24: service driver pciehp loaded
[ 6.876267] pciehp 0000:02:0b.0:pcie24: Slot #11 AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl- LLActRep-
[ 6.888639] pciehp 0000:02:0b.0:pcie24: service driver pciehp loaded
[ 6.888644] pciehp 0000:02:0c.0:pcie24: Slot #12 AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl- LLActRep-
[ 6.901016] pciehp 0000:02:0c.0:pcie24: service driver pciehp loaded
[ 6.901022] pciehp 0000:2e:01.0:pcie24: Slot #1 AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl- LLActRep-
[ 6.913298] pciehp 0000:2e:01.0:pcie24: service driver pciehp loaded
[ 6.913304] pciehp 0000:2e:02.0:pcie24: Slot #2 AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl- LLActRep-
[ 6.925581] pciehp 0000:2e:02.0:pcie24: service driver pciehp loaded
[ 6.925587] pciehp 0000:2e:03.0:pcie24: Slot #3 AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl- LLActRep-
[ 6.937862] pciehp 0000:2e:03.0:pcie24: service driver pciehp loaded
[ 6.937868] pciehp 0000:2e:04.0:pcie24: Slot #4 AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl- LLActRep-
[ 6.950142] pciehp 0000:2e:04.0:pcie24: service driver pciehp loaded
[ 6.987039] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
AFTER Card (with pcie switch and devices on it) Insertion
\-[0000:00]-+-00.0
+-01.0-[01-26]----00.0-[02-26]--+-09.0-[03-0b]--
| +-0a.0-[0c-14]--
| +-0b.0-[15-1d]--
| \-0c.0-[1e-26]--
+-02.0-[27]--+-00.0
| +-00.1
| +-00.2
| \-00.3
+-02.2-[28-2a]--+-00.0
| \-00.1
+-03.0-[2b]--
+-03.1-[2c]--+-00.0
| +-00.1
| +-00.2
| \-00.3
+-03.2-[2d-52]--+-00.0-[2e-52]--+-01.0-[2f-37]--
| | +-02.0-[38-40]--
| | +-03.0-[41-49]--+-00.0-[42-46]--+-01.0-[43]----00.0
| | | | +-02.0-[44]--+-00.0
| | | | | \-00.1
| | | | +-04.0-[45]--+-00.0
| | | | | +-00.1
| | | | | +-00.2
| | | | | \-00.3
| | | | \-0a.0-[46]--+-00.0
| | | | +-00.1
| | | | +-00.2
| | | | \-00.3
| | | +-00.1
| | | +-00.2
| | | +-00.3
| | | \-00.4
| | \-04.0-[4a-52]--
| +-00.1
| +-00.2
| +-00.3
| \-00.4
+-05.0
+-05.1
+-05.2
+-05.4
+-14.0
When card inserted ( hotplugged ) messages i see
pciehp 0000:2e:03.0:pcie24: Card present on Slot(3)
pci 0000:41:00.0: Max Payload Size set to 256 (was 128, max 256)
pci 0000:41:00.1: Max Payload Size set to 256 (was 128, max 256)
pci 0000:41:00.2: Max Payload Size set to 256 (was 128, max 256)
pci 0000:41:00.3: Max Payload Size set to 256 (was 128, max 256)
pci 0000:41:00.4: Max Payload Size set to 256 (was 128, max 256)
pci 0000:41:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
pci 0000:42:01.0: Max Payload Size set to 256 (was 128, max 256)
pci 0000:42:02.0: Max Payload Size set to 256 (was 128, max 256)
pci 0000:42:04.0: Max Payload Size set to 256 (was 128, max 256)
pci 0000:42:0a.0: Max Payload Size set to 256 (was 128, max 256)
pci 0000:41:00.0: PCI bridge to [bus 42-ff]
pci 0000:42:01.0: bridge configuration invalid ([bus 00-00]), reconfiguring
pci 0000:42:02.0: bridge configuration invalid ([bus 00-00]), reconfiguring
pci 0000:42:04.0: bridge configuration invalid ([bus 00-00]), reconfiguring
pci 0000:42:0a.0: bridge configuration invalid ([bus 00-00]), reconfiguring
pci 0000:43:00.0: Max Payload Size set to 256 (was 128, max 256)
pci 0000:42:01.0: PCI bridge to [bus 43-ff]
pci 0000:44:00.0: can't set Max Payload Size to 256; if necessary, use "pci=pcie_bus_safe" and report a bug
pci 0000:44:00.1: can't set Max Payload Size to 256; if necessary, use "pci=pcie_bus_safe" and report a bug
pci 0000:42:02.0: PCI bridge to [bus 44-ff]
pci 0000:45:00.0: can't set Max Payload Size to 256; if necessary, use "pci=pcie_bus_safe" and report a bug
pci 0000:45:00.1: can't set Max Payload Size to 256; if necessary, use "pci=pcie_bus_safe" and report a bug
pci 0000:45:00.2: can't set Max Payload Size to 256; if necessary, use "pci=pcie_bus_safe" and report a bug
pci 0000:45:00.3: can't set Max Payload Size to 256; if necessary, use "pci=pcie_bus_safe" and report a bug
pci 0000:42:04.0: PCI bridge to [bus 45-ff]
pci 0000:46:00.0: can't set Max Payload Size to 256; if necessary, use "pci=pcie_bus_safe" and report a bug
pci 0000:46:00.1: can't set Max Payload Size to 256; if necessary, use "pci=pcie_bus_safe" and report a bug
pci 0000:46:00.2: can't set Max Payload Size to 256; if necessary, use "pci=pcie_bus_safe" and report a bug
pci 0000:46:00.3: can't set Max Payload Size to 256; if necessary, use "pci=pcie_bus_safe" and report a bug
pci 0000:42:0a.0: PCI bridge to [bus 46-ff]
pci 0000:41:00.0: BAR 9: assigned [mem 0xd5000000-0xd6ffffff 64bit pref]
pci 0000:41:00.0: BAR 8: assigned [mem 0x91000000-0x914fffff]
pci 0000:41:00.0: BAR 0: assigned [mem 0x91500000-0x9153ffff]
pci 0000:41:00.1: BAR 0: assigned [mem 0x91540000-0x91541fff]
pci 0000:41:00.2: BAR 0: assigned [mem 0x91542000-0x91543fff]
pci 0000:41:00.3: BAR 0: assigned [mem 0x91544000-0x91545fff]
pci 0000:41:00.4: BAR 0: assigned [mem 0x91546000-0x91547fff]
pci 0000:41:00.0: BAR 7: no space for [io size 0x2000]
pci 0000:41:00.0: BAR 7: failed to assign [io size 0x2000]
pci 0000:41:00.0: BAR 7: no space for [io size 0x2000]
pci 0000:41:00.0: BAR 7: failed to assign [io size 0x2000]
pci 0000:42:02.0: BAR 9: assigned [mem 0xd5000000-0xd63fffff 64bit pref]
pci 0000:42:01.0: BAR 8: assigned [mem 0x91000000-0x910fffff]
pci 0000:42:02.0: BAR 8: assigned [mem 0x91100000-0x912fffff]
pci 0000:42:04.0: BAR 9: assigned [mem 0xd6400000-0xd67fffff 64bit pref]
pci 0000:42:0a.0: BAR 8: assigned [mem 0x91300000-0x914fffff]
pci 0000:42:0a.0: BAR 9: assigned [mem 0xd6800000-0xd6dfffff 64bit pref]
pci 0000:42:02.0: BAR 7: no space for [io size 0x1000]
pci 0000:42:02.0: BAR 7: failed to assign [io size 0x1000]
pci 0000:42:0a.0: BAR 7: no space for [io size 0x1000]
pci 0000:42:0a.0: BAR 7: failed to assign [io size 0x1000]
pci 0000:42:0a.0: BAR 7: no space for [io size 0x1000]
pci 0000:42:0a.0: BAR 7: failed to assign [io size 0x1000]
pci 0000:42:02.0: BAR 7: no space for [io size 0x1000]
pci 0000:42:02.0: BAR 7: failed to assign [io size 0x1000]
pci 0000:43:00.0: BAR 0: assigned [mem 0x91000000-0x9103ffff]
pci 0000:42:01.0: PCI bridge to [bus 43]
pci 0000:42:01.0: bridge window [mem 0x91000000-0x910fffff]
pci 0000:44:00.0: BAR 2: assigned [mem 0xd5000000-0xd57fffff 64bit pref]
pci 0000:44:00.1: BAR 2: assigned [mem 0xd5800000-0xd5ffffff 64bit pref]
pci 0000:44:00.0: BAR 0: assigned [mem 0xd6000000-0xd6007fff 64bit pref]
pci 0000:44:00.1: BAR 0: assigned [mem 0xd6008000-0xd600ffff 64bit pref]
pci 0000:42:02.0: PCI bridge to [bus 44]
pci 0000:42:02.0: bridge window [mem 0x91100000-0x912fffff]
pci 0000:42:02.0: bridge window [mem 0xd5000000-0xd63fffff 64bit pref]
pci 0000:42:04.0: PCI bridge to [bus 45]
pci 0000:42:04.0: bridge window [mem 0xd6400000-0xd67fffff 64bit pref]
pci 0000:42:0a.0: PCI bridge to [bus 46]
pci 0000:42:0a.0: bridge window [mem 0x91300000-0x914fffff]
pci 0000:42:0a.0: bridge window [mem 0xd6800000-0xd6dfffff 64bit pref]
pci 0000:41:00.0: PCI bridge to [bus 42-46]
pci 0000:41:00.0: bridge window [mem 0x91000000-0x914fffff]
pci 0000:41:00.0: bridge window [mem 0xd5000000-0xd6ffffff 64bit pref]
pcieport 0000:2e:03.0: PCI bridge to [bus 41-49]
pcieport 0000:2e:03.0: bridge window [io 0xa000-0xafff]
pcieport 0000:2e:03.0: bridge window [mem 0x91000000-0x917fffff]
pcieport 0000:2e:03.0: bridge window [mem 0xd5000000-0xdc7fffff 64bit pref]
pcieport 0000:41:00.0: enabling device (0000 -> 0002)
pcieport 0000:42:01.0: enabling device (0000 -> 0002)
pcieport 0000:42:02.0: enabling device (0000 -> 0002)
pciehp 0000:42:02.0:pcie24: Slot #2 AttnBtn+ PwrCtrl+ MRL+ AttnInd+ PwrInd+ HotPlug+ Surprise- Interlock- NoCompl- LLActRep-
pcieport 0000:42:04.0: enabling device (0000 -> 0002)
pcieport 0000:42:0a.0: enabling device (0000 -> 0002)
pciehp 0000:42:0a.0:pcie24: Slot #10 AttnBtn+ PwrCtrl+ MRL+ AttnInd+ PwrInd+ HotPlug+ Surprise- Interlock- NoCompl- LLActRep-
Device A : Memory not assigned
lspci -vvv -s 45:*
45:00.0
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-
Region 0: Memory at <unassigned> (64-bit, prefetchable) [disabled] [size=1M]
Capabilities: [50] MSI: Enable- Count=1/32 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [78] 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=0 PME-
Capabilities: [80] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 25.000W
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 #1, Speed 2.5GT/s, Width x1, ASPM not supported, Exit Latency L0s <4us, L1 <1us
ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk-
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR-, OBFF Not Supported
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] Multi-Function Virtual Channel <?>
Capabilities: [200 v1] Vendor Specific Information:
Device B : Region 0 assigned
lspci -vvv -s 44:*
44:00.0
Subsystem:
Physical Slot: 2-2
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 0
Region 0: Memory at d6000000 (64-bit, prefetchable) [disabled] [size=32K]
Region 2: Memory at d5000000 (64-bit, prefetchable) [disabled] [size=8M]
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
pcilib: sysfs_read_vpd: read failed: Connection timed out
Not readable
Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [a0] MSI-X: Enable- Count=1 Masked-
Vector table: BAR=0 offset=00000000
PBA: BAR=0 offset=00000000
Capabilities: [ac] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <4us, L1 <64us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 25.000W
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 5GT/s, Width x2, ASPM L0s L1, Exit Latency L0s <2us, L1 <4us
ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk-
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 5GT/s, Width x2, 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: 5GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
LnkSta2: Current De-emphasis Level: -6dB, 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 00-00-00-00-00-00-00-00
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: [180 v1] Vendor Specific Information: ID=0000 Rev=0 Len=028 <?>
Capabilities: [1b0 v1] Latency Tolerance Reporting
Max snoop latency: 0ns
Max no snoop latency: 0ns
Capabilities: [250 v1] #12
Scenario 2: COLD boot ( when card is inserted in the slot before power on )
\-[0000:00]-+-00.0
+-01.0-[01-26]----00.0-[02-26]--+-09.0-[03-0b]--
| +-0a.0-[0c-14]--
| +-0b.0-[15-1d]--
| \-0c.0-[1e-26]--
+-02.0-[27]--+-00.0
| +-00.1
| +-00.2
| \-00.3
+-02.2-[28-2a]--+-00.0
| \-00.1
+-03.0-[2b]--
+-03.1-[2c]--+-00.0
| +-00.1
| +-00.2
| \-00.3
+-03.2-[2d-57]--+-00.0-[2e-57]--+-01.0-[2f-37]--
| | +-02.0-[38-40]--
| | +-03.0-[41-4e]--+-00.0-[42-46]--+-01.0-[43]----00.0
| | | | +-02.0-[44]--+-00.0
| | | | | \-00.1
| | | | +-04.0-[45]--+-00.0
| | | | | +-00.1
| | | | | +-00.2
| | | | | \-00.3
| | | | \-0a.0-[46]--+-00.0
| | | | +-00.1
| | | | +-00.2
| | | | \-00.3
| | | +-00.1
| | | +-00.2
| | | +-00.3
| | | \-00.4
| | \-04.0-[4f-57]--
| +-00.1
| +-00.2
| +-00.3
| \-00.4
Device A
lspci -vvv -s 45:00.0
45:00.0
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-
Region 0: Memory at 183fff000000 (64-bit, prefetchable) [size=1M]
Capabilities: [50] MSI: Enable- Count=1/32 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [78] 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=0 PME-
Capabilities: [80] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 25.000W
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 #1, Speed 2.5GT/s, Width x1, ASPM not supported, Exit Latency L0s <4us, L1 <1us
ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk-
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR-, OBFF Not Supported
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] Multi-Function Virtual Channel <?>
Capabilities: [200 v1] Vendor Specific Information:
Device B
lspci -vvv -s 44:00.0
44:00.0
Subsystem:
Physical Slot: 2-2
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 10
Region 0: Memory at 183ffe808000 (64-bit, prefetchable) [size=32K]
Region 2: Memory at 183ffe000000 (64-bit, prefetchable) [size=8M]
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
pcilib: sysfs_read_vpd: read failed: Connection timed out
Not readable
Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [a0] MSI-X: Enable- Count=1 Masked-
Vector table: BAR=0 offset=00000000
PBA: BAR=0 offset=00000000
Capabilities: [ac] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <4us, L1 <64us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 25.000W
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 5GT/s, Width x2, ASPM L0s L1, Exit Latency L0s <2us, L1 <4us
ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk-
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 5GT/s, Width x2, 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: 5GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
LnkSta2: Current De-emphasis Level: -6dB, 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 00-00-00-00-00-00-00-00
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: [180 v1] Vendor Specific Information: ID=0000 Rev=0 Len=028 <?>
Capabilities: [1b0 v1] Latency Tolerance Reporting
Max snoop latency: 0ns
Max no snoop latency: 0ns
Capabilities: [250 v1] #12
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