XTRX enumeration issue

Greetings!

I’m having an issue with a physical xtrx 1.2 device.

I’m wondering if this could be either the device doesn’t have any configuration on it, or perhaps EEPROM / Flash corruption?

• The PCIe board and software work fine with a different xtrx 1.2 device.

• My understanding is that this device has never been flashed or even powered on prior to this issue being visible.

• I’m using commit 368efb0154a459e42317ae270bf9716e776b82ac of LimeSuiteNG to build the kernel module and the relevant lime* CLI tools.

• The device does show up ( with the serial number 00-00-00-00-00-00-00-00 ) using lspci.

• Running limeDevice results in LimePCIe: Failed to open (/dev/limepcie0/control0), errno(5) Input/output error.

• Doing a modprobe limepcie, and subsequent rmmod limepcie results in the following dmesg:

[ 2686.631972] limepcie : module init
[ 2686.635501] limepcie 0000:01:00.0: [Probing device] vid:10EE pid:7023
[ 2686.643162] limepcie 0000:01:00.0: BAR0 address=0x000000002e27903a
[ 2686.669657] limepcie 0000:01:00.0: Identifier: \xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff
[ 2686.696487] limepcie 0000:01:00.0: [device info] LimeSDR-Unknown FW:255 HW:255 PROTOCOL:255 S/N:0xFFFFFFFFFFFFFFFF 
[ 2686.706980] limepcie 0000:01:00.0: 4.000 Gb/s available PCIe bandwidth, limited by 5.0 GT/s PCIe x1 link at 0000:00:00.0 (capable of 8.000 Gb/s with 5.0 GT/s PCIe x2 link)
[ 2686.722351] limepcie 0000:01:00.0: Required DMA mask ffffffffffffffff. Attempting 64bit mask.
[ 2686.730968] limepcie 0000:01:00.0: 1 MSI IRQs allocated.
[ 2686.736308] limepcie 0000:01:00.0: DMA buffer size not specified, defaulting to 8192
[ 2686.744080] limepcie 0000:01:00.0: Invalid DMA channel count(-1)
[ 2686.750108] limepcie 0000:01:00.0: Creating /dev/limepcie0/control0
[ 2725.930712] limepcie 0000:01:00.0: [Removing device] vid:10EE pid:7023
[ 2725.937279] limepcie 0000:01:00.0: FreeIRQs 1
[ 2725.942045] limepcie : module exit

• The relevant section of lspci -vvvv is below:

0000:01:00.0 Multimedia audio controller: Xilinx Corporation Device 7023 (rev 01)                                                                                                  
        Subsystem: Xilinx Corporation Device 0007                                                                                                                                  
        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 1b80000000 (32-bit, non-prefetchable) [virtual] [size=1M]                                                                                              
        Capabilities: [40] 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: [48] MSI: Enable- Count=1/1 Maskable- 64bit-                                                                                                                 
                Address: 00000000  Data: 0000                                                                                                                                      
        Capabilities: [60] Express (v2) Endpoint, MSI 00                                                                                                                           
                DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <64ns, L1 unlimited                                                                                         
                        ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 0W                                                                                          
                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 #0, Speed 5GT/s, Width x2, ASPM L0s, Exit Latency L0s unlimited                                                                                       
                        ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp-                                                                                                           
                LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk-                                                                                                            
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-                                                                                                             
                LnkSta: Speed 5GT/s, Width x1 (downgraded)                                                                                                                         
                        TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-                                                                                                          
                DevCap2: Completion Timeout: Range B, TimeoutDis- NROPrPrP- LTR-                                                                                                   
                         10BitTagComp- 10BitTagReq- OBFF Not Supported, ExtFmt- EETLPPrefix-                                                                                       
                         EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-                                                                                       
                         FRS- TPHComp- ExtTPHComp-                                                                                                                                 
                         AtomicOpsCap: 32bit- 64bit- 128bitCAS-                                                                                                                    
                DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR- 10BitTagReq- OBFF Disabled,                                                                            
                         AtomicOpsCtl: ReqEn-                                                                                                                                      
                LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-                                                                                                      
                         Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-                                                                          
                         Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB preshoot                                                                                             
                LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- EqualizationPhase1-                                                                                
                         EqualizationPhase2- EqualizationPhase3- LinkEqualizationRequest-                                                                                          
                         Retimer- 2Retimers- CrosslinkRes: unsupported                                                                                                             
        Capabilities: [100 v1] Device Serial Number 00-00-00-00-00-00-00-00                                                                                                        
        Kernel modules: limepcie

An earlier version of the LimeSuiteNG repository using litepcie kernel module seemed to have a similar non-functional response.

Is there something that anyone would recommend other than soldering to the JTAG port?

Thanks!

edit: forgot to mention, the kernel is forcing 32bit DMA ( comes out of this thread ), without it the device is not found at all.

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