RE: ATH9 driver issues on ARM64

Bharat Kumar Gogada
2016-12-09T02:54:35Z

> > >> On 08/12/16 15:29, Bharat Kumar Gogada wrote:
> > >>
> > >> Two things:
> > >>
> > >>> 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
> >
> > By the way, please use a recent kernel. Seeing edge here means you're
> > running with something that is a bit old (and broken). And since you
> > haven't even said what revision of the kernel you're using, hslping
> > you is not an easy task. tglx told you something similar about a week ago.
> >
> > >>> 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
> > >>
> > >> I'm not even going to consider looking at something that is running
> > >> out of tree code. So please start things with a fresh kernel that
> > >> doesn't contain stuff we can't debug.
> > >>
> > > Ok will test with fresh kernel.
> > >
> > >>> 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
> This irq line is handling miscellaneous interrupts this shows level triggered.
> > >>> 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
> > >>
> > >> What is this "dummy" controller? And if that's supposed to be a
> > >> legacy interrupt from the PCI device, it has the wrong trigger.
> > >
> > > Yes it is for legacy interrupt, wrong trigger means ?
> >
> > Aren't legacy interrupts supposed to be *level* triggered, and not edge?
> >
> Yes agreed.
> For legacy interrupts im using irq_set_chained_handler_and_data so the irq line
> between bridge and GIC Will not be shown here. The above how is virq for
> legacy, which is given by kernel, not sure why its state is set to edge.
>
>

Here I'm adding fresh kernel log: (using 4.6.0 kernel version)
root@Xilinx-ZCU102-2016_3:~# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
1: 0 0 0 0 GICv2 29 Edge arch_timer
2: 1368 1294 1655 2657 GICv2 30 Edge arch_timer
30: 0 0 0 0 GICv2 95 Level eth0, eth0
206: 311 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: 7 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: 0 0 0 0 GICv2 81 Level mmc0
219: 0 0 0 0 GICv2 187 Level arm-smmu global fault
220: 126 0 0 0 GICv2 53 Level xuartps
224: 3 0 0 0 dummy 1 Edge ath9k
IPI0: 1293 1003 914 671 Rescheduling interrupts
IPI1: 77 78 25 55 Function call interrupts
IPI2: 0 0 0 0 CPU stop interrupts
IPI3: 0 0 0 0 Timer broadcast interrupts
IPI4: 0 0 0 0 IRQ work interrupts
IPI5: 0 0 0 0 CPU wake-up interrupts

root@Xilinx-ZCU102-2016_3:~#iw dev wlan0 scan
[ 95.869644] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 95.875051] 0-...: (1 GPs behind) idle=659/140000000000001/0 softirq=1166/1166 fqs=257
[ 95.883125] (detected by 3, t=5253 jiffies, g=217, c=216, q=54)
[ 95.889108] Task dump for CPU 0:
[ 95.892318] kworker/u8:0 R running task 0 6 2 0x00000002
[ 95.899359] Workqueue: phy0 ieee80211_scan_work
[ 95.903862] Call trace:
[ 95.906299] [<ffffff8008086b14>] __switch_to+0x9c/0xd0
[ 95.911417] [<ffffffc87b87fc00>] 0xffffffc87b87fc00
[ 158.969641] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 158.975046] 0-...: (1 GPs behind) idle=659/140000000000001/0 softirq=1166/1166 fqs=1028
[ 158.983209] (detected by 3, t=21028 jiffies, g=217, c=216, q=54)
[ 158.989278] Task dump for CPU 0:
[ 158.992489] kworker/u8:0 R running task 0 6 2 0x00000002
[ 158.999523] Workqueue: phy0 ieee80211_scan_work
[ 159.004032] Call trace:
[ 159.006467] [<ffffff8008086b14>] __switch_to+0x9c/0xd0
[ 159.011588] [<ffffffc87b87fc00>] 0xffffffc87b87fc00

Thans & Regards,
Bharat