[PATCH 0/4] wifi: ath12k: Add support to enable debugfs_htt_stats

[Ramya Gnanasekar]

> -----Original Message-----
> From: Jeff Johnson (QUIC) <quic_jjohnson at quicinc.com>
> Sent: Tuesday, April 30, 2024 3:05 AM
> To: Ramya Gnanasekar (Temp) (QUIC) <quic_rgnanase at quicinc.com>;
> ath12k at lists.infradead.org
> Cc: linux-wireless at vger.kernel.org
> Subject: Re: [PATCH 0/4] wifi: ath12k: Add support to enable debugfs_htt_stats
> 
> On 4/29/2024 10:38 AM, Ramya Gnanasekar wrote:
> > Bring in the basic infrastructure necessary for enabling htt_stats via debugfs.
> > Patch series bring support to request stats type to firmware, dump the
> > stats and request to reset the stats from firmware.
> >
> > Schema with one ath12k device:
> >
> > ath12k
> > `-- pci-0000:06:00.0
> >     |-- mac0
> >         `-- htt_stats
> >         |-- htt_stats_type
> >         |-- htt_stats_reset
> >
> > Dinesh Karthikeyan (3):
> >   wifi: ath12k: Add support to enable debugfs_htt_stats
> >   wifi: ath12k: Add htt_stats_dump file ops support
> >   wifi: ath12k: Add support to parse requested stats_type
> >
> > Ramya Gnanasekar (1):
> >   wifi: ath12k: Dump additional Tx PDEV HTT stats
> >
> >  drivers/net/wireless/ath/ath12k/Makefile      |   2 +-
> >  drivers/net/wireless/ath/ath12k/core.h        |  11 +
> >  drivers/net/wireless/ath/ath12k/debugfs.c     |   3 +
> >  .../wireless/ath/ath12k/debugfs_htt_stats.c   | 713 ++++++++++++++++++
> >  .../wireless/ath/ath12k/debugfs_htt_stats.h   | 300 ++++++++
> >  drivers/net/wireless/ath/ath12k/dp_rx.c       |  10 +-
> >  drivers/net/wireless/ath/ath12k/dp_rx.h       |   4 +
> >  7 files changed, 1038 insertions(+), 5 deletions(-)  create mode
> > 100644 drivers/net/wireless/ath/ath12k/debugfs_htt_stats.c
> >  create mode 100644
> > drivers/net/wireless/ath/ath12k/debugfs_htt_stats.h
> >
> >
> > base-commit: 326f8f68f28b0b831233acfabffb486a5b0f4717
> 
> testing on my laptop
> 
> good news is the files are being populated:
> # ls /sys/kernel/debug/ath12k/pci-0000\:03\:00.0/mac0/
> dfs_simulate_radar  htt_stats  htt_stats_reset  htt_stats_type
> 
> bad news is:
> # echo 1 > /sys/kernel/debug/ath12k/pci-0000\:03\:00.0/mac0/htt_stats_type
> # cat /sys/kernel/debug/ath12k/pci-0000\:03\:00.0/mac0/htt_stats
> cat: '/sys/kernel/debug/ath12k/pci-0000:03:00.0/mac0/htt_stats': Connection
> timed out
> 
> journalctl shows:
> Apr 29 14:17:16 qca-HP-ZBook-14-G2 kernel: ath12k_pci 0000:03:00.0: htc rx
> completion ep 2 skb ffff8c4e50e5ed00 Apr 29 14:17:19 qca-HP-ZBook-14-G2
> kernel: ath12k_pci 0000:03:00.0: stats request timed out
> 
> so something isn't right, at least for WCN7850
> 
> has this been tested with upstream kernel?

Tested on QCN9274 upstream kernel. HTT stats event is not received by host upon stats request.
Will check further on this.