Re: ATH9 driver issues on ARM64

From: Tobias Klausmann
Date: Fri Dec 09 2016 - 09:22:49 EST

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Hello there,

as this is a thread about ath9k and ARM64, i'm not sure if i should answer here or not, but i have similar "stalls" with ath9k on x86_64 (starting with 4.9rc), stack trace is posted down below where the original ARM64 stall traces are.

Greetings,

Tobias

On 08.12.2016 18:36, Kalle Valo wrote:

Bharat Kumar Gogada <bharat.kumar.gogada@xxxxxxxxxx> 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

[ 81.876902] INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 81.876912] Tasks blocked on level-0 rcu_node (CPUs 0-7): P0
[ 81.876932] (detected by 4, t=60002 jiffies, g=1873, c=1872, q=4967)
[ 81.876936] swapper/4 R running task 0 0 1 0x00000000
[ 81.876941] 0000000000000001 ffffffff810725f6 ffff88017edbc240 ffffffff81a3dc40
[ 81.876945] ffffffff81101e46 ffff88025ef173c0 ffffffff81a3dc40 ffffffff81a3dc40
[ 81.876948] 00000000ffffffff ffffffff810a7333 ffff88017ecee698 ffff88017edbc240
[ 81.876951] Call Trace:
[ 81.876970] <IRQ>
[ 81.876979] [<ffffffff810725f6>] ? sched_show_task+0xd6/0x140
[ 81.876983] [<ffffffff81101e46>] ? rcu_print_detail_task_stall_rnp+0x40/0x61
[ 81.876989] [<ffffffff810a7333>] ? rcu_check_callbacks+0x6b3/0x8c0
[ 81.876993] [<ffffffff810b8350>] ? tick_sched_handle.isra.14+0x40/0x40
[ 81.876996] [<ffffffff810aa4c3>] ? update_process_times+0x23/0x50
[ 81.876999] [<ffffffff810b8383>] ? tick_sched_timer+0x33/0x60
[ 81.877002] [<ffffffff810aaf09>] ? __hrtimer_run_queues+0xb9/0x150
[ 81.877004] [<ffffffff810ab198>] ? hrtimer_interrupt+0x98/0x1a0
[ 81.877008] [<ffffffff81031b1e>] ? smp_trace_apic_timer_interrupt+0x5e/0x90
[ 81.877012] [<ffffffff815b31bf>] ? apic_timer_interrupt+0x7f/0x90
[ 81.877013] <EOI>
[ 81.877017] [<ffffffff8147f28d>] ? cpuidle_enter_state+0x13d/0x1f0
[ 81.877019] [<ffffffff8147f289>] ? cpuidle_enter_state+0x139/0x1f0
[ 81.877021] [<ffffffff81088c19>] ? cpu_startup_entry+0x139/0x210
[ 81.877027] [<ffffffff8102fc9e>] ? start_secondary+0x13e/0x170
[ 81.877029] swapper/4 R running task 0 0 1 0x00000000
[ 81.877032] 0000000000000001 ffffffff810725f6 ffff88017edbc240 ffffffff81a3dc40
[ 81.877035] ffffffff81101e46 ffff88025ef173c0 ffffffff81a3dc40 ffffffff81a3dc40
[ 81.877038] 00000000ffffffff ffffffff810a7368 ffff88017ecee698 ffff88017edbc240
[ 81.877041] Call Trace:
[ 81.877045] <IRQ>
[ 81.877049] [<ffffffff810725f6>] ? sched_show_task+0xd6/0x140
[ 81.877051] [<ffffffff81101e46>] ? rcu_print_detail_task_stall_rnp+0x40/0x61
[ 81.877055] [<ffffffff810a7368>] ? rcu_check_callbacks+0x6e8/0x8c0
[ 81.877058] [<ffffffff810b8350>] ? tick_sched_handle.isra.14+0x40/0x40
[ 81.877060] [<ffffffff810aa4c3>] ? update_process_times+0x23/0x50
[ 81.877063] [<ffffffff810b8383>] ? tick_sched_timer+0x33/0x60
[ 81.877065] [<ffffffff810aaf09>] ? __hrtimer_run_queues+0xb9/0x150
[ 81.877068] [<ffffffff810ab198>] ? hrtimer_interrupt+0x98/0x1a0
[ 81.877070] [<ffffffff81031b1e>] ? smp_trace_apic_timer_interrupt+0x5e/0x90
[ 81.877073] [<ffffffff815b31bf>] ? apic_timer_interrupt+0x7f/0x90
[ 81.877074] <EOI>
[ 81.877076] [<ffffffff8147f28d>] ? cpuidle_enter_state+0x13d/0x1f0
[ 81.877078] [<ffffffff8147f289>] ? cpuidle_enter_state+0x139/0x1f0
[ 81.877080] [<ffffffff81088c19>] ? cpu_startup_entry+0x139/0x210
[ 81.877084] [<ffffffff8102fc9e>] ? start_secondary+0x13e/0x170
[ 91.132787] INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P0 } 63785 jiffies s: 505 root: 0x0/T
[ 91.132796] blocking rcu_node structures:

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

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