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

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Message-Id: <20251030043150.3905086-1-yu.zhang@oss.qualcomm.com>
Date: Wed, 29 Oct 2025 21:31:44 -0700
From: "Yu Zhang(Yuriy)" <yu.zhang@....qualcomm.com>
To: jjohnson@...nel.org
Cc: linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        ath11k@...ts.infradead.org
Subject: [PATCH ath-next 0/6] wifi: ath11k: Add single shot/periodic CFR capture support

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>
---
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         | 991 ++++++++++++++++++
 drivers/net/wireless/ath/ath11k/cfr.h         | 301 ++++++
 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, 1816 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: 197498315de711140bcc4722fdeb7c1761777100
-- 
2.34.1