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sachin_blr's avatar
sachin_blr
Icon for New Contributor rankNew Contributor
5 years ago
Solved

Arria 10 PCIe Gen3x8 DMA(AN 829 ) - Linux Driver Error " Couldn't open the device"

Hi all, We were trying to install the DMA test driver and run the Linux DMA software as mentioned in "AN 829: PCI Express* Avalon®-MM DMA Reference Design" under "1.2.7. Installing the DMA Test Dri...
  • sachin_blr's avatar
    sachin_blr
    5 years ago

    Thank for your following up on this issue, SK.

    Our issue got resolved, on setting the base class code (upper byte at offset 0Bh in the PCIe configuration space) to 0xFF (Device does not fit any defined class). We did not have to change our host device or OS.

    We were able to successfully run the Linux DMA software as mentioned in "AN 829: PCI Express Avalon -MM DMA Reference Design" document.

    Regards,

    Sachin

SengKok_L_Intel's avatar
SengKok_L_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

After reboot, do you able to see the FPGA PCIe is enumerated?


What is the output if you run the commands below?

lspci -nn | grep 1172


lspci -s 5:01.0 -vvv (assuming the BDF is 5.01.0).


Besides, you may try to type "make" compile the driver and then run it again.



  • sachin_blr's avatar
    sachin_blr
    Icon for New Contributor rankNew Contributor
    5 years ago

    Thank you for the response, SK

    Following is the output of running the commands that you mentioned.

    root@grljetson-desktop:/home/grl-jetson/FPGA_PCIe_driver/AN829_driver# lspci -nn | grep 1172
    0005:01:00.0 Non-VGA unclassified device [0000]: Altera Corporation Device [1172:e093] (rev 01)

    root@grljetson-desktop:/home/grl-jetson/FPGA_PCIe_driver/AN829_driver# lspci -s 5:01:0 -vvv
    0005:01:00.0 Non-VGA unclassified device: Altera Corporation Device e093 (rev 01)
    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 <unassigned> (64-bit, prefetchable) [disabled] [size=512]
    Region 2: Memory at <unassigned> (64-bit, prefetchable) [disabled] [size=512M]
    Capabilities: [50] MSI: Enable- Count=1/4 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 256 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
    ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 0.000W
    DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
    RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
    MaxPayload 256 bytes, MaxReadReq 512 bytes
    DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
    LnkCap: Port #1, Speed 8GT/s, Width x8, 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 8GT/s, Width x8, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
    DevCap2: Completion Timeout: Not Supported, TimeoutDis+, LTR-, OBFF Not Supported
    DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled
    LnkCtl2: Target Link Speed: 8GT/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] 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: [200 v1] Vendor Specific Information: ID=1172 Rev=0 Len=044 <?>
    Capabilities: [300 v1] #19
    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- NonFatalErr-
    CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
    AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn-

    Also, I compiled the driver again(using "make") and ran it. Still getting the same output of "Couldn't open the device." as before

    Following are the commands that were used to compile and run (as root user):

    - make EXTRA_CFLAGS=-DARRIA10

    - ./altera_dma_load

    - ./run

    Regards,

    Sachin