RE: ATH9 driver issues on ARM64

From: Bharat Kumar Gogada <hidden>
Date: 2016-12-09 14:36:07
Also in: linux-pci, lkml

 Correcting Manohar Mail ID.

Hello there,
=20
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.
=20
Greetings,
=20
Tobias
=20
=20
On 08.12.2016 18:36, Kalle Valo wrote:

quoted

Bharat Kumar Gogada [off-list ref] writes:

quoted

  > [+cc Kalle, ath9k list]

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

quoted

On Thu, Dec 08, 2016 at 01:49:42PM +0000, Bharat Kumar Gogada wrote:

quoted

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.

quoted

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 mea=

quoted

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.

quoted

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 happenin=

when we do interface link up.

quoted

When we have less debug prints in Atheros driver, and do wifi scan we =

see

Assert_INTx but never Deassert_INTx,

quoted

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, o=

quoted

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)

quoted

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 r=

esult.

quoted

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=3D2d1/140000000000001/0 softirq=3D1400/1400 fqs=3D36713

quoted

[  230.457189] 	 (t=3D36756 jiffies g=3D161 c=3D160 q=3D16169)
[  230.457191] Task dump for CPU 2:
[  230.457196] kworker/u8:4    R  running task        0  1342      2 0=

x00000002

quoted

[  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

quoted

[  230.457306] f8e0: ffffff800a1b4065 0000000000000006 ffffff800a12900=

ffffffc87b8010a8

quoted

[  230.457310] f900: ffffff808a1b4057 ffffff800a1c3000 ffffff800a1b300=

ffffff800a13b000

quoted

[  230.457314] f920: 0000000000000140 0000000000000006

ffffff800a1b3b10 ffffff800a1c39e8

quoted

[  230.457318] f940: 000000000000002f ffffff800a1b8a98 ffffff800a1b3ae=

ffffffc87b07f990

quoted

[  230.457322] f960: ffffff80080d6230 ffffffc87b07f990 ffffff80080d623=

0000000060000145

quoted

** 1 printk messages dropped ** [  230.457329] [<ffffff8008085720>]

el1_irq+0xa0/0x100

quoted

** 9 printk messages dropped ** [  230.457373] [<ffffff800885ad60>]

ieee80211_hw_config+0x50/0x290

quoted

[  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=3D2d1/140000000000001/0 softirq=3D1400/1400 fqs=3D115374

quoted

[  545.526199] 	 (t=3D115523 jiffies g=3D161 c=3D160 q=3D51066)
[  545.526201] Task dump for CPU 2:
[  545.526206] kworker/u8:4    R  running task        0  1342      2 0=

x00000002

quoted

** 3 printk messages dropped ** [  545.526231] [<ffffff8008089a0c>]

show_stack+0x14/0x20

quoted

** 9 printk messages dropped ** [  545.526280] [<ffffff80086a71e8>]

arch_timer_handler_phys+0x30/0x40

quoted

[  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 0xffffffc87b07f99=

0)

quoted

[  545.526306] f860:                                   000000000000973=

2 ffffff800a1eaaa8

quoted

** 8 printk messages dropped ** [  545.526341] f980: ffffff800a1c39e8

0000000000000036

quoted

[  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

quoted

** 11 printk messages dropped ** [  545.532834] ath9k_hw_kill_interrup=

ts

quoted

[  545.532890] ath9k_hw_enable_interrupts	 821

=20
[   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=3D60002 jiffies, g=3D1873, c=3D1872,=

 q=3D4967)

[   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+0x40/0x4=

[   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+0x40/0x4=

[   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:
=20

quoted


But if we have less debug prints it does not reach EP handler sometime=

s, due

to following

quoted

Condition in "kernel/irq/chip.c" in function handle_simple_irq

if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
                 desc->istate |=3D 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=3D9d5/140000000000001/0

softirq=3D1103/1109 fqs=3D519

quoted

[   75.976675] 	(detected by 2, t=3D5274 jiffies, g=3D64, c=3D63, q=3D=

11)

quoted

[   75.982485] Task dump for CPU 0:
[   75.985696] ksoftirqd/0     R  running task        0     3      2 0=

x00000002

quoted

[   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=3D9d5/140000000000001/0

softirq=3D1103/1109 fqs=3D2097

quoted

[  139.072593] 	(detected by 2, t=3D21049 jiffies, g=3D64, c=3D63, q=

=3D11)

quoted

[  139.078489] Task dump for CPU 0:
[  139.081700] ksoftirqd/0     R  running task        0     3      2 0=

x00000002

quoted

[  139.088731] Call trace:
[  139.091165] [<ffffff8008086b3c>] __switch_to+0xc4/0xd0
[  139.096285] [<ffffffc87b830500>] 0xffffffc87b830500

quoted

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])

quoted

	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-

ParErr- Stepping- SERR- FastB2B- DisINTx-

quoted

	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=3Dfast >TAbort-

<TAbort- <MAbort- >SERR- <PERR- INTx-

quoted

	Latency: 0
	Interrupt: pin A routed to IRQ 224
	Bus: primary=3D00, secondary=3D01, subordinate=3D0c, sec-latency=3D0
	I/O behind bridge: 00000000-00000fff
	Memory behind bridge: e0000000-e00fffff
	Prefetchable memory behind bridge: 00000000fff00000-

00000000000fffff

quoted

	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=3Dfast >TAbort-

<TAbort- <MAbort- <SERR- <PERR-

quoted

	BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: [40] Power Management version 3
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=3D0mA

PME(D0+,D1+,D2+,D3hot+,D3cold-)

quoted

		Status: D0 NoSoftRst+ PME-Enable- DSel=3D0 DScale=3D0 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-

quoted

			RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
			MaxPayload 128 bytes, MaxReadReq 512 bytes
		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr-

TransPend+

quoted

		LnkCap:	Port #0, Speed 5GT/s, Width x2, ASPM not supported,

Exit Latency L0s unlimited, L1 unlimited

quoted

			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-

quoted

		RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna-

CRSVisible+

quoted

		RootCap: CRSVisible+
		RootSta: PME ReqID 0000, PMEStatus- PMEPending-
		DevCap2: Completion Timeout: Range B, TimeoutDis+, LTR-,

OBFF Not Supported ARIFwd-

quoted

		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-,

OBFF Disabled ARIFwd-

quoted

		LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
			 Transmit Margin: Normal Operating Range,

EnterModifiedCompliance- ComplianceSOS-

quoted

			 Compliance De-emphasis: -6dB
		LnkSta2: Current De-emphasis Level: -3.5dB,

EqualizationComplete-, EqualizationPhase1-

quoted

			 EqualizationPhase2-, EqualizationPhase3-,

LinkEqualizationRequest-

quoted

	Capabilities: [100 v1] Device Serial Number 00-00-00-00-00-00-00-00
	Capabilities: [10c v1] Virtual Channel
		Caps:	LPEVC=3D0 RefClk=3D100ns PATEntryBits=3D1
		Arb:	Fixed- WRR32- WRR64- WRR128-
		Ctrl:	ArbSelect=3DFixed
		Status:	InProgress-
		VC0:	Caps:	PATOffset=3D00 MaxTimeSlots=3D1 RejSnoopTrans-
			Arb:	Fixed- WRR32- WRR64- WRR128- TWRR128-

WRR256-

quoted

			Ctrl:	Enable+ ID=3D0 ArbSelect=3DFixed TC/VC=3Dff
			Status:	NegoPending- InProgress-
	Capabilities: [128 v1] Vendor Specific Information: ID=3D1234 Rev=3D1

Len=3D018 <?>

quoted

01:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network

Adapter (rev 01)

quoted

	Subsystem: Qualcomm Atheros Device 3112
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-

ParErr- Stepping- SERR- FastB2B- DisINTx-

quoted

	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=3Dfast >TAbort-

<TAbort- <MAbort- >SERR- <PERR- INTx-

quoted

	Latency: 0, Cache Line Size: 128 bytes
	Interrupt: pin A routed to IRQ 224
	Region 0: Memory at e0000000 (64-bit, non-prefetchable) [size=3D128K]
	[virtual] Expansion ROM at e0020000 [disabled] [size=3D64K]
	Capabilities: [40] Power Management version 3
		Flags: PMEClk- DSI- D1+ D2- AuxCurrent=3D375mA

PME(D0+,D1+,D2-,D3hot+,D3cold-)

quoted

		Status: D0 NoSoftRst- PME-Enable- DSel=3D0 DScale=3D0 PME-
	Capabilities: [50] MSI: Enable- Count=3D1/4 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

quoted

			ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-

SlotPowerLimit 0.000W

quoted

		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal-

Unsupported-

quoted

			RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop-
			MaxPayload 128 bytes, MaxReadReq 512 bytes
		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr-

TransPend-

quoted

		LnkCap:	Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit

Latency L0s <2us, L1 <64us

quoted

			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-

quoted

		DevCap2: Completion Timeout: Not Supported, TimeoutDis+,

LTR-, OBFF Not Supported

quoted

		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-,

OBFF Disabled

quoted

		LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance-

SpeedDis-

quoted

			 Transmit Margin: Normal Operating Range,

EnterModifiedCompliance- ComplianceSOS-

quoted

			 Compliance De-emphasis: -6dB
		LnkSta2: Current De-emphasis Level: -6dB,

EqualizationComplete-, EqualizationPhase1-

quoted

			 EqualizationPhase2-, EqualizationPhase3-,

LinkEqualizationRequest-

quoted

	Capabilities: [100 v1] Advanced Error Reporting
		UESta:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt-

RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-

quoted

		UEMsk:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt-

RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-

quoted

		UESvrt:	DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt-

RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-

quoted

		CESta:	RxErr- BadTLP- BadDLLP- Rollover- Timeout-

NonFatalErr-

quoted

		CEMsk:	RxErr- BadTLP- BadDLLP- Rollover- Timeout-

NonFatalErr+

quoted

		AERCap:	First Error Pointer: 00, GenCap- CGenEn-

ChkCap- ChkEn-

quoted

	Capabilities: [140 v1] Virtual Channel
		Caps:	LPEVC=3D0 RefClk=3D100ns PATEntryBits=3D1
		Arb:	Fixed- WRR32- WRR64- WRR128-
		Ctrl:	ArbSelect=3DFixed
		Status:	InProgress-
		VC0:	Caps:	PATOffset=3D00 MaxTimeSlots=3D1 RejSnoopTrans-
			Arb:	Fixed- WRR32- WRR64- WRR128- TWRR128-

WRR256-

quoted

			Ctrl:	Enable+ ID=3D0 ArbSelect=3DFixed TC/VC=3Dff
			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

quoted

   2:      19873      20058      19089      17435     GICv2  30 Edge  =

    arch_timer

quoted

  12:          0          0          0          0     GICv2 156 Level =

    zynqmp-dma

quoted

  13:          0          0          0          0     GICv2 157 Level =

    zynqmp-dma

quoted

  14:          0          0          0          0     GICv2 158 Level =

    zynqmp-dma

quoted

  15:          0          0          0          0     GICv2 159 Level =

    zynqmp-dma

quoted

  16:          0          0          0          0     GICv2 160 Level =

    zynqmp-dma

quoted

  17:          0          0          0          0     GICv2 161 Level =

    zynqmp-dma

quoted

  18:          0          0          0          0     GICv2 162 Level =

    zynqmp-dma

quoted

  19:          0          0          0          0     GICv2 163 Level =

    zynqmp-dma

quoted

  20:          0          0          0          0     GICv2 164 Level =

    Mali_GP_MMU,

Mali_GP, Mali_PP0_MMU, Mali_PP0, Mali_PP1_MMU, Mali_PP1

quoted

  30:          0          0          0          0     GICv2  95 Level =

    eth0, eth0

quoted

206:        314          0          0          0     GICv2  49 Level  =

   cdns-i2c

quoted

207:         40          0          0          0     GICv2  50 Level  =

   cdns-i2c

quoted

209:          0          0          0          0     GICv2 150 Level  =

   nwl_pcie:misc

quoted

214:         12          0          0          0     GICv2  47 Level  =

   ff0f0000.spi

quoted

215:          0          0          0          0     GICv2  58 Level  =

   ffa60000.rtc

quoted

216:          0          0          0          0     GICv2  59 Level  =

   ffa60000.rtc

quoted

217:          0          0          0          0     GICv2 165 Level  =

   ahci-

ceva[fd0c0000.ahci]

quoted

218:         61          0          0          0     GICv2  81 Level  =

   mmc0

quoted

219:          0          0          0          0     GICv2 187 Level  =

   arm-smmu global fault

quoted

220:        471          0          0          0     GICv2  53 Level  =

   xuartps

quoted

223:          0          0          0          0     GICv2 154 Level  =

   fd4c0000.dma

quoted

224:          3          0          0          0     dummy   1 Edge   =

   ath9k

quoted

225:          0          0          0          0     GICv2  97 Level  =

   xhci-hcd:usb1

quoted
quoted
Regards,
Bharat

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