This series enables get_survey() on wcn36xx. Tested with wcn3620 and
wcn3680b.
wcn36xx reports RSSI and SNR in the buffer descriptor of each delivered
frame wcn36xx -> host. Thus far we have only extracted RSSI but, extracting
the SNR lets us also report the noise-floor.
Adding in some background tracking of the current tuned channel lets us
flag which channel is currently in use when running "iw wlan0 survey dump"
For both wcn3620 and wcn3680b I have verified both the STA and AP's view of
RSSI and noise.
Example wcn3620:
AP Asus RT-AX88U
SSID: "linaro-test"
noise: -78 dBm Channel: 8
BSSID: 04:D4:C4:AA:BB:CC
MAC RSSI
02:00:16:qq:xx:yy -35dBm
STA
root@linaro-developer:~# iw wlan0 link
Connected to 04:d4:c4:aa:bb:cc (on wlan0)
SSID: linaro-test
freq: 2447
RX: 768377 bytes (4250 packets)
TX: 8136 bytes (97 packets)
signal: -37 dBm
root@linaro-developer:~# iw wlan0 survey dump
Survey data from wlan0
frequency: 2412 MHz
Survey data from wlan0
frequency: 2417 MHz
noise: -12 dBm
Survey data from wlan0
frequency: 2422 MHz
noise: -82 dBm
Survey data from wlan0
frequency: 2427 MHz
noise: -76 dBm
Survey data from wlan0
frequency: 2432 MHz
noise: -78 dBm
Survey data from wlan0
frequency: 2437 MHz
noise: -100 dBm
Survey data from wlan0
frequency: 2442 MHz
noise: -41 dBm
Survey data from wlan0
frequency: 2447 MHz [in use]
noise: -75 dBm
Example wcn3680b:
AP Asus RT-AX88U:
SSID: "linaro-test"
noise: -80 dBm Channel: 60/160
BSSID: 04:D4:C4:DD:EE:FF
MAC RSSI
E2:C0:10:YY:XX:QQ -31dBm
STA:
root@linaro-developer:~# iw wlan0 link
Connected to 04:d4:c4:dd:ee:ff (on wlan0)
SSID: linaro-test
freq: 5300
RX: 5999294 bytes (32764 packets)
TX: 35443 bytes (493 packets)
signal: -27 dBm
rx bitrate: 433.3 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 1
tx bitrate: 6.0 MBit/s
bss flags: short-slot-time
dtim period: 3
beacon int: 100
root@linaro-developer:~# iw wlan0 survey dump
Survey data from wlan0
frequency: 2412 MHz
noise: -63 dBm
Survey data from wlan0
frequency: 2417 MHz
noise: -57 dBm
Survey data from wlan0
frequency: 2422 MHz
noise: -74 dBm
Survey data from wlan0
frequency: 2427 MHz
noise: -90 dBm
Survey data from wlan0
frequency: 2432 MHz
noise: -72 dBm
Survey data from wlan0
frequency: 2437 MHz
noise: -33 dBm
Survey data from wlan0
frequency: 2442 MHz
noise: -72 dBm
Survey data from wlan0
frequency: 2447 MHz
noise: -68 dBm
Survey data from wlan0
frequency: 2452 MHz
noise: -33 dBm
Survey data from wlan0
frequency: 2457 MHz
noise: -33 dBm
Survey data from wlan0
frequency: 2462 MHz
noise: -36 dBm
Survey data from wlan0
frequency: 2467 MHz
noise: -68 dBm
Survey data from wlan0
frequency: 2472 MHz
noise: -34 dBm
Survey data from wlan0
frequency: 5180 MHz
noise: -63 dBm
Survey data from wlan0
frequency: 5200 MHz
noise: -57 dBm
Survey data from wlan0
frequency: 5220 MHz
noise: -74 dBm
Survey data from wlan0
frequency: 5240 MHz
noise: -90 dBm
Survey data from wlan0
frequency: 5260 MHz
noise: -72 dBm
Survey data from wlan0
frequency: 5280 MHz
noise: -33 dBm
Survey data from wlan0
frequency: 5300 MHz [in use]
noise: -72 dBm
Bryan O'Donoghue (4):
wcn36xx: Implement get_snr()
wcn36xx: Track the band and channel we are tuned to
wcn36xx: Track SNR and RSSI for each RX frame
wcn36xx: Add SNR reporting via get_survey()
drivers/net/wireless/ath/wcn36xx/main.c | 81 ++++++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/txrx.c | 37 ++++++++++
drivers/net/wireless/ath/wcn36xx/wcn36xx.h | 13 ++++
3 files changed, 131 insertions(+)
--
2.33.0
