linux-kernel - Re: [PATCH ath-next v3 0/6] wifi: ath11k: Add single shot/periodic CFR capture support

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Message-ID: <2cc29c2e-a066-4c49-99dd-872cc2f5f326@oss.qualcomm.com>
Date: Thu, 6 Nov 2025 16:50:28 +0800
From: Baochen Qiang <baochen.qiang@....qualcomm.com>
To: "Yu Zhang(Yuriy)" <yu.zhang@....qualcomm.com>, jjohnson@...nel.org
Cc: linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        ath11k@...ts.infradead.org
Subject: Re: [PATCH ath-next v3 0/6] wifi: ath11k: Add single shot/periodic
 CFR capture support



On 11/6/2025 1:22 AM, Yu Zhang(Yuriy) wrote:
> To enable/disable cfr feature use command,
> 
> echo <val> > /sys/kernel/debug/ieee80211/phyX/ath11k/enable_cfr
> 
> where, val: 0 to disable CFR and 1 to enable CFR.
> 
> To enable CFR capture for associated peers,
> 
> echo "<val> <bw> <periodicity> <method>"
>  >
> /sys/kernel/debug/ieee80211/phyX/netdev\:wlanx/stations/<mac>/cfr_capture
> 
> val: 0 - stop CFR capture
>      1 - start CFR capture
> bw: CFR capture bandwidth
>      0 - 20MHZ
>      1 - 40MHZ
>      2 - 80MHZ
> Periodicity: Periodicity at which hardware is expceted to collect CFR
> dump.
>      0 - single shot capture.
>      non zero - for Periodic captures (value should be multiple of 10
> ms)
> method: Method used by hardware to collect the CFR dump.
>      0 - from the ACKs of QOS NULL packets.
> 
> To enable CFR capture for unassociated clients,
> 
> echo “<mac address> <val> <periodicity>”
>  > /sys/kernel/debug/ieee80211/phyX/ath11k/cfr_unassoc
> 
> Mac address: mac address of the client.
> Val: 0 - start CFR capture
>      1 – stop CFR capture
> Periodicity: Periodicity at which hardware is expceted to collect CFR
> dump.
>      0 - single shot capture.
>      non zero - for Periodic captures (value should be multiple of 10
> ms)
> 
> To collect the cfr dump,
> cat /sys/kernel/debug/ieee80211/phy0/ath11k/cfr_capture0 > /tmp/cfr.bin
> 
> Previous link:
> https://lore.kernel.org/all/1645005922-7252-1-git-send-email-quic_vnaralas@quicinc.com/
> 
> Signed-off-by: Yu Zhang(Yuriy) <yu.zhang@....qualcomm.com>
> 
> ---
> Changes in v3:
>  - Update related comments. 
> Changes in v2:
>  - Update related comments. 
> ---
> 
> Venkateswara Naralasetty (6):
>   wifi: ath11k: Add initialization and deinitialization sequence for CFR
>     module
>   wifi: ath11k: Register debugfs for CFR configuration
>   wifi: ath11k: Add support unassociated client CFR
>   wifi: ath11k: Register relayfs entries for CFR dump
>   wifi: ath11k: Register DBR event handler for CFR data
>   wifi: ath11k: Register handler for CFR capture event
> 
>  drivers/net/wireless/ath/ath11k/Kconfig       |   11 +
>  drivers/net/wireless/ath/ath11k/Makefile      |    1 +
>  drivers/net/wireless/ath/ath11k/cfr.c         | 1007 +++++++++++++++++
>  drivers/net/wireless/ath/ath11k/cfr.h         |  302 +++++
>  drivers/net/wireless/ath/ath11k/core.c        |   41 +-
>  drivers/net/wireless/ath/ath11k/core.h        |   19 +-
>  drivers/net/wireless/ath/ath11k/dbring.c      |   50 +-
>  drivers/net/wireless/ath/ath11k/dbring.h      |    8 +-
>  drivers/net/wireless/ath/ath11k/debug.h       |    8 +-
>  drivers/net/wireless/ath/ath11k/debugfs_sta.c |  143 ++-
>  drivers/net/wireless/ath/ath11k/hal.c         |    3 +-
>  drivers/net/wireless/ath/ath11k/hw.h          |    5 +-
>  drivers/net/wireless/ath/ath11k/mac.c         |   17 +-
>  drivers/net/wireless/ath/ath11k/wmi.c         |  147 ++-
>  drivers/net/wireless/ath/ath11k/wmi.h         |   97 +-
>  15 files changed, 1833 insertions(+), 26 deletions(-)
>  create mode 100644 drivers/net/wireless/ath/ath11k/cfr.c
>  create mode 100644 drivers/net/wireless/ath/ath11k/cfr.h
> 
> 
> base-commit: 059ca8fd692b67a77fb89e9d4e8f57cf08e32b08

Reviewed-by: Baochen Qiang <baochen.qiang@....qualcomm.com>