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SubjectRe: ATH9 driver issues on ARM64
Date
Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com> writes:

> > [+cc Kalle, ath9k list]

Thanks, but please also CC linux-wireless. Full thread below for the
folks there.

>> On Thu, Dec 08, 2016 at 01:49:42PM +0000, Bharat Kumar Gogada wrote:
>> > Hi,
>> >
>> > Did anyone test Atheros ATH9 driver(drivers/net/wireless/ath/ath9k/)
>> > on ARM64. The end point is TP link wifi card with which supports
>> > only legacy interrupts.
>>
>> If it works on other arches and the arm64 PCI enumeration works, my
>> first guess would be an INTx issue, e.g., maybe the driver is waiting
>> for an interrupt that never arrives.
> We are not sure for now.
>>
>> > We are trying to test it on ARM64 with
>> > (drivers/pci/host/pcie-xilinx-nwl.c) as root port.
>> >
>> > EP is getting enumerated and able to link up.
>> >
>> > But when we start scan system gets hanged.
>>
>> When you say the system hangs when you start a scan, I assume you mean
>> a wifi scan, not the PCI enumeration. A problem with a wifi scan
>> might cause a *process* to hang, but it shouldn't hang the entire
>> system.
>>
> Yes wifi scan.
>> > When we took trace we see that after we start scan assert message is
>> > sent but there is no de assert from end point.
>>
>> Are you talking about a trace from a PCIe analyzer? Do you see an
>> Assert_INTx PCIe message on the link?
>>
> Yes lecroy trace, yes we do see Assert_INTx and Deassert_INTx happening when we do interface link up.
> When we have less debug prints in Atheros driver, and do wifi scan we see Assert_INTx but never Deassert_INTx,
>> > What might cause end point not sending de assert ?
>>
>> If the endpoint doesn't send a Deassert_INTx message, I expect that
>> would mean the driver didn't service the interrupt and remove the
>> condition that caused the device to assert the interrupt in the first
>> place.
>>
>> If the driver didn't receive the interrupt, it couldn't service it, of
>> course. You could add a printk in the ath9k interrupt service
>> routine to see if you ever get there.
>>
> The interrupt behavior is changing w.r.t amount of debug prints we add. (I kept many prints to aid debug)
> root@Xilinx-ZCU102-2016_3:~# iw dev wlan0 scan
> [ 83.064675] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.069486] ath9k: ath9k_ioread32 ffffff800a400024
> [ 83.074257] ath9k_hw_kill_interrupts 793
> [ 83.078260] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.083107] ath9k: ath9k_ioread32 ffffff800a400024
> [ 83.087882] ath9k_hw_kill_interrupts 793
> [ 83.095450] ath9k_hw_enable_interrupts 821
> [ 83.099557] ath9k_hw_enable_interrupts 825
> [ 83.103721] ath9k_hw_enable_interrupts 832
> [ 83.107887] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.112748] AR_SREV_9100 0
> [ 83.115438] ath9k_hw_enable_interrupts 848
> [ 83.119607] ath9k: ath9k_ioread32 ffffff800a400024
> [ 83.124389] ath9k_hw_intrpend 762
> [ 83.127761] (AR_SREV_9340(ah) val 0
> [ 83.131234] ath9k_hw_intrpend 767
> [ 83.134628] ath_isr 603
> [ 83.137134] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.141995] ath9k: ath9k_ioread32 ffffff800a400024
> [ 83.146771] ath9k_hw_kill_interrupts 793
> [ 83.150864] ath9k_hw_enable_interrupts 821
> [ 83.154971] ath9k_hw_enable_interrupts 825
> [ 83.159135] ath9k_hw_enable_interrupts 832
> [ 83.163300] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.168161] AR_SREV_9100 0
> [ 83.170852] ath9k_hw_enable_interrupts 848
> [ 83.170855] ath9k_hw_intrpend 762
> [ 83.178398] (AR_SREV_9340(ah) val 0
> [ 83.181873] ath9k_hw_intrpend 767
> [ 83.185265] ath_isr 603
> [ 83.187773] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.192635] ath9k: ath9k_ioread32 ffffff800a400024
> [ 83.197411] ath9k_hw_kill_interrupts 793
> [ 83.201414] ath9k: ath9k_ioread32 ffffff800a400024
> [ 83.206258] ath9k_hw_enable_interrupts 821
> [ 83.210368] ath9k_hw_enable_interrupts 825
> [ 83.214531] ath9k_hw_enable_interrupts 832
> [ 83.218698] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.223558] AR_SREV_9100 0
> [ 83.226243] ath9k_hw_enable_interrupts 848
> [ 83.226246] ath9k_hw_intrpend 762
> [ 83.233794] (AR_SREV_9340(ah) val 0
> [ 83.237268] ath9k_hw_intrpend 767
> [ 83.240661] ath_isr 603
> [ 83.243169] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.248030] ath9k: ath9k_ioread32 ffffff800a400024
> [ 83.252806] ath9k_hw_kill_interrupts 793
> [ 83.256811] ath9k: ath9k_ioread32 ffffff800a400024
> [ 83.261651] ath9k_hw_enable_interrupts 821
> [ 83.265753] ath9k_hw_enable_interrupts 825
> [ 83.269919] ath9k_hw_enable_interrupts 832
> [ 83.274083] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.278945] AR_SREV_9100 0
> [ 83.281630] ath9k_hw_enable_interrupts 848
> [ 83.281633] ath9k_hw_intrpend 762
> [ 83.281634] (AR_SREV_9340(ah) val 0
> [ 83.281637] ath9k_hw_intrpend 767
> [ 83.281648] ath_isr 603
> [ 83.281649] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.281651] ath9k: ath9k_ioread32 ffffff800a400024
> [ 83.281654] ath9k_hw_kill_interrupts 793
> [ 83.312192] ath9k: ath9k_ioread32 ffffff800a400024
> [ 83.317030] ath9k_hw_enable_interrupts 821
> [ 83.321132] ath9k_hw_enable_interrupts 825
> [ 83.325297] ath9k_hw_enable_interrupts 832
> [ 83.329463] ath9k: ath9k_iowrite32 ffffff800a400024
> [ 83.334324] AR_SREV_9100 0
> [ 83.337014] ath9k_hw_enable_interrupts 848
> ..
> ..
> This log continues until I turn off board without obtaining scanning result.
>
> In between I get following cpu stall outputs :
> 230.457179] INFO: rcu_sched self-detected stall on CPU
> [ 230.457185] 2-...: (31314 ticks this GP) idle=2d1/140000000000001/0 softirq=1400/1400 fqs=36713
> [ 230.457189] (t=36756 jiffies g=161 c=160 q=16169)
> [ 230.457191] Task dump for CPU 2:
> [ 230.457196] kworker/u8:4 R running task 0 1342 2 0x00000002
> [ 230.457207] Workqueue: phy0 ieee80211_scan_work
> [ 230.457208] Call trace:
> [ 230.457214] [<ffffff8008089860>] dump_backtrace+0x0/0x198
> [ 230.457219] [<ffffff8008089a0c>] show_stack+0x14/0x20
> [ 230.457224] [<ffffff80080c0930>] sched_show_task+0x98/0xf8
> [ 230.457228] [<ffffff80080c2628>] dump_cpu_task+0x40/0x50
> [ 230.457233] [<ffffff80080e14a8>] rcu_dump_cpu_stacks+0xa0/0xf0
> [ 230.457239] [<ffffff80080e4cd8>] rcu_check_callbacks+0x468/0x748
> [ 230.457243] [<ffffff80080e7cfc>] update_process_times+0x3c/0x68
> [ 230.457249] [<ffffff80080f6dfc>] tick_sched_handle.isra.5+0x3c/0x50
> [ 230.457253] [<ffffff80080f6e54>] tick_sched_timer+0x44/0x90
> [ 230.457257] [<ffffff80080e86b0>] __hrtimer_run_queues+0xf0/0x178
> ** 10 printk messages dropped ** [ 230.457302] f8c0: 0000000000000000 0000000005f5e0ff 000000000001379a 3866666666666620
> [ 230.457306] f8e0: ffffff800a1b4065 0000000000000006 ffffff800a129000 ffffffc87b8010a8
> [ 230.457310] f900: ffffff808a1b4057 ffffff800a1c3000 ffffff800a1b3000 ffffff800a13b000
> [ 230.457314] f920: 0000000000000140 0000000000000006 ffffff800a1b3b10 ffffff800a1c39e8
> [ 230.457318] f940: 000000000000002f ffffff800a1b8a98 ffffff800a1b3ae8 ffffffc87b07f990
> [ 230.457322] f960: ffffff80080d6230 ffffffc87b07f990 ffffff80080d6234 0000000060000145
> ** 1 printk messages dropped ** [ 230.457329] [<ffffff8008085720>] el1_irq+0xa0/0x100
> ** 9 printk messages dropped ** [ 230.457373] [<ffffff800885ad60>] ieee80211_hw_config+0x50/0x290
> [ 230.457377] [<ffffff8008863690>] ieee80211_scan_work+0x1f8/0x480
> [ 230.457383] [<ffffff80080b15d0>] process_one_work+0x120/0x378
> [ 230.457386] [<ffffff80080b1870>] worker_thread+0x48/0x4b0
> [ 230.457391] [<ffffff80080b7108>] kthread+0xd0/0xe8
> [ 230.457395] [<ffffff8008085dd0>] ret_from_fork+0x10/0x40
> [ 230.480389] ath9k_hw_intrpend 762
>
>
> [ 545.487987] ath9k: ath9k_ioread32 ffffff800a400024
> [ 545.526189] INFO: rcu_sched self-detected stall on CPU
> [ 545.526195] 2-...: (97636 ticks this GP) idle=2d1/140000000000001/0 softirq=1400/1400 fqs=115374
> [ 545.526199] (t=115523 jiffies g=161 c=160 q=51066)
> [ 545.526201] Task dump for CPU 2:
> [ 545.526206] kworker/u8:4 R running task 0 1342 2 0x00000002
> ** 3 printk messages dropped ** [ 545.526231] [<ffffff8008089a0c>] show_stack+0x14/0x20
> ** 9 printk messages dropped ** [ 545.526280] [<ffffff80086a71e8>] arch_timer_handler_phys+0x30/0x40
> [ 545.526284] [<ffffff80080dbe18>] handle_percpu_devid_irq+0x78/0xa0
> [ 545.526291] [<ffffff80080d760c>] generic_handle_irq+0x24/0x38
> [ 545.526296] [<ffffff80080d7944>] __handle_domain_irq+0x5c/0xb8
> [ 545.526299] [<ffffff80080824bc>] gic_handle_irq+0x64/0xc0
> [ 545.526302] Exception stack(0xffffffc87b07f870 to 0xffffffc87b07f990)
> [ 545.526306] f860: 0000000000009732 ffffff800a1eaaa8
> ** 8 printk messages dropped ** [ 545.526341] f980: ffffff800a1c39e8 0000000000000036
> [ 545.526345] [<ffffff8008085720>] el1_irq+0xa0/0x100
> [ 545.526349] [<ffffff80080d6234>] console_unlock+0x384/0x5b0
> [ 545.526353] [<ffffff80080d673c>] vprintk_emit+0x2dc/0x4b0
> [ 545.526357] [<ffffff80080d6a50>] vprintk_default+0x38/0x40
> [ 545.526362] [<ffffff8008129704>] printk+0x58/0x60
> [ 545.526366] [<ffffff800859e3e4>] ath9k_iowrite32+0x9c/0xa8
> [ 545.526372] [<ffffff80085c7ca8>] ath9k_hw_kill_interrupts+0x28/0xf0
> [ 545.526376] [<ffffff80085a18ec>] ath_reset+0x24/0x68
> ** 2 printk messages dropped ** [ 545.526391] [<ffffff800885ad60>] ieee80211_hw_config+0x50/0x290
> ** 11 printk messages dropped ** [ 545.532834] ath9k_hw_kill_interrupts 793
> [ 545.532890] ath9k_hw_enable_interrupts 821
>
>
> But if we have less debug prints it does not reach EP handler sometimes, due to following
> Condition in "kernel/irq/chip.c" in function handle_simple_irq
>
> if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
> desc->istate |= IRQS_PENDING;
> goto out_unlock;
> }
> Here irqd_irq_disabled is being set to 1.
>
> With lesser debug prints it stops after following prints:
> root@Xilinx-ZCU102-2016_3:~# iw dev wlan0 scan
> [ 54.781045] ath9k_hw_kill_interrupts 793
> [ 54.785007] ath9k_hw_kill_interrupts 793
> [ 54.792535] ath9k_hw_enable_interrupts 821
> [ 54.796642] ath9k_hw_enable_interrupts 825
> [ 54.800807] ath9k_hw_enable_interrupts 832
> [ 54.804973] AR_SREV_9100 0
> [ 54.807663] ath9k_hw_enable_interrupts 848
> [ 54.811843] ath9k_hw_intrpend 762
> [ 54.815211] (AR_SREV_9340(ah) val 0
> [ 54.818684] ath9k_hw_intrpend 767
> [ 54.822078] ath_isr 603
> [ 54.824587] ath9k_hw_kill_interrupts 793
> [ 54.828601] ath9k_hw_enable_interrupts 821
> [ 54.832750] ath9k_hw_enable_interrupts 825
> [ 54.836916] ath9k_hw_enable_interrupts 832
> [ 54.841082] AR_SREV_9100 0
> [ 54.843772] ath9k_hw_enable_interrupts 848
> [ 54.843775] ath9k_hw_intrpend 762
> [ 54.851319] (AR_SREV_9340(ah) val 0
> [ 54.854793] ath9k_hw_intrpend 767
> [ 54.858185] ath_isr 603
> [ 54.860696] ath9k_hw_kill_interrupts 793
> [ 54.864776] ath9k_hw_enable_interrupts 821
> [ 54.867061] ath9k_hw_kill_interrupts 793
> [ 54.872870] ath9k_hw_enable_interrupts 825
> [ 54.877036] ath9k_hw_enable_interrupts 832
> [ 54.881202] AR_SREV_9100 0
> [ 54.883892] ath9k_hw_enable_interrupts 848
> [ 75.963129] INFO: rcu_sched detected stalls on CPUs/tasks:
> [ 75.968602] 0-...: (2 GPs behind) idle=9d5/140000000000001/0 softirq=1103/1109 fqs=519
> [ 75.976675] (detected by 2, t=5274 jiffies, g=64, c=63, q=11)
> [ 75.982485] Task dump for CPU 0:
> [ 75.985696] ksoftirqd/0 R running task 0 3 2 0x00000002
> [ 75.992726] Call trace:
> [ 75.995165] [<ffffff8008086b3c>] __switch_to+0xc4/0xd0
> [ 76.000281] [<ffffffc87b830500>] 0xffffffc87b830500
> [ 139.059027] INFO: rcu_sched detected stalls on CPUs/tasks:
> [ 139.064430] 0-...: (2 GPs behind) idle=9d5/140000000000001/0 softirq=1103/1109 fqs=2097
> [ 139.072593] (detected by 2, t=21049 jiffies, g=64, c=63, q=11)
> [ 139.078489] Task dump for CPU 0:
> [ 139.081700] ksoftirqd/0 R running task 0 3 2 0x00000002
> [ 139.088731] Call trace:
> [ 139.091165] [<ffffff8008086b3c>] __switch_to+0xc4/0xd0
> [ 139.096285] [<ffffffc87b830500>] 0xffffffc87b830500
>
>
>> > We are not seeing any issues on 32-bit ARM platform and X86
>> > platform.
>>
>> Can you collect a dmesg log (or, if the system hang means you can't
>> collect that, a console log with "ignore_loglevel"), and "lspci -vv"
>> output as root? That should have clues about whether the INTx got
>> routed correctly. /proc/interrupts should also show whether we're
>> receiving interrupts from the device.
>
> Here is the lspci output:
> 00:00.0 PCI bridge: Xilinx Corporation Device d022 (prog-if 00 [Normal decode])
> 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-
> Latency: 0
> Interrupt: pin A routed to IRQ 224
> Bus: primary=00, secondary=01, subordinate=0c, sec-latency=0
> I/O behind bridge: 00000000-00000fff
> Memory behind bridge: e0000000-e00fffff
> Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff
> Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
> BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
> PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
> 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: [60] Express (v2) Root Port (Slot-), MSI 00
> DevCap: MaxPayload 256 bytes, PhantFunc 0
> ExtTag- RBE+
> 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 not supported, Exit Latency L0s unlimited, L1 unlimited
> 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-
> RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible+
> RootCap: CRSVisible+
> RootSta: PME ReqID 0000, PMEStatus- PMEPending-
> DevCap2: Completion Timeout: Range B, TimeoutDis+, LTR-, OBFF Not Supported ARIFwd-
> DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled ARIFwd-
> LnkCtl2: Target Link Speed: 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] Device Serial Number 00-00-00-00-00-00-00-00
> Capabilities: [10c 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: [128 v1] Vendor Specific Information: ID=1234 Rev=1 Len=018 <?>
>
> 01:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network Adapter (rev 01)
> Subsystem: Qualcomm Atheros Device 3112
> 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-
> Latency: 0, Cache Line Size: 128 bytes
> Interrupt: pin A routed to IRQ 224
> Region 0: Memory at e0000000 (64-bit, non-prefetchable) [size=128K]
> [virtual] Expansion ROM at e0020000 [disabled] [size=64K]
> Capabilities: [40] Power Management version 3
> Flags: PMEClk- DSI- D1+ D2- AuxCurrent=375mA PME(D0+,D1+,D2-,D3hot+,D3cold-)
> Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
> Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+
> Address: 0000000000000000 Data: 0000
> Masking: 00000000 Pending: 00000000
> Capabilities: [70] Express (v2) Endpoint, MSI 00
> DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <1us, L1 <8us
> ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 0.000W
> 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 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <2us, L1 <64us
> 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: Not Supported, 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: -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: [140 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: [300 v1] Device Serial Number 00-00-00-00-00-00-00-00
> Kernel driver in use: ath9k
>
> Here is the cat /proc/interrupts (after we do interface up):
>
> root@:~# ifconfig wlan0 up
> [ 1548.926601] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
> root@Xilinx-ZCU102-2016_3:~# cat /proc/interrupts
> CPU0 CPU1 CPU2 CPU3
> 1: 0 0 0 0 GICv2 29 Edge arch_timer
> 2: 19873 20058 19089 17435 GICv2 30 Edge arch_timer
> 12: 0 0 0 0 GICv2 156 Level zynqmp-dma
> 13: 0 0 0 0 GICv2 157 Level zynqmp-dma
> 14: 0 0 0 0 GICv2 158 Level zynqmp-dma
> 15: 0 0 0 0 GICv2 159 Level zynqmp-dma
> 16: 0 0 0 0 GICv2 160 Level zynqmp-dma
> 17: 0 0 0 0 GICv2 161 Level zynqmp-dma
> 18: 0 0 0 0 GICv2 162 Level zynqmp-dma
> 19: 0 0 0 0 GICv2 163 Level zynqmp-dma
> 20: 0 0 0 0 GICv2 164 Level Mali_GP_MMU, Mali_GP, Mali_PP0_MMU, Mali_PP0, Mali_PP1_MMU, Mali_PP1
> 30: 0 0 0 0 GICv2 95 Level eth0, eth0
> 206: 314 0 0 0 GICv2 49 Level cdns-i2c
> 207: 40 0 0 0 GICv2 50 Level cdns-i2c
> 209: 0 0 0 0 GICv2 150 Level nwl_pcie:misc
> 214: 12 0 0 0 GICv2 47 Level ff0f0000.spi
> 215: 0 0 0 0 GICv2 58 Level ffa60000.rtc
> 216: 0 0 0 0 GICv2 59 Level ffa60000.rtc
> 217: 0 0 0 0 GICv2 165 Level ahci-ceva[fd0c0000.ahci]
> 218: 61 0 0 0 GICv2 81 Level mmc0
> 219: 0 0 0 0 GICv2 187 Level arm-smmu global fault
> 220: 471 0 0 0 GICv2 53 Level xuartps
> 223: 0 0 0 0 GICv2 154 Level fd4c0000.dma
> 224: 3 0 0 0 dummy 1 Edge ath9k
> 225: 0 0 0 0 GICv2 97 Level xhci-hcd:usb1
>
> Regards,
> Bharat

--
Kalle Valo

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