I am reposting this msg in kernel-newbie list hoping to get some help.Sorry if this is not encouraged.
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 (0xd6000000) and scenario 2 (183ffe808000 ).
4. Why do i see BAR 7 : failed to assign memory. All operations to the device are working fine. so can i ignore this ?
Setup:
Currently running 3.19 ( linux yocto ). Also tried on 4.4.16 ( linux yocto ). Below log is from running 4.4.16 kernel
pcie switch has inbuilt hotplug controller and pcieport driver binds to all the ports. All downstream ports are hotplug enabled which is bound by pciehp service driver.
I checked that BIOS has allocated enough memory for all the devices ( scenario 2 proves
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.
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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