[PATCH 3/3] wifi: ath12k: report station mode signal strength

[Jeff Johnson]

On 4/10/2024 7:53 PM, Lingbo Kong wrote:
> Currently, the signal strength of "iw dev xxx station dump" always show an
> invalid value.
> 
> This is because signal strength is only set in ath12k_mgmt_rx_event()
> function, and not set for received data packet. So, change to get signal
> from firmware and report to mac80211.
> 
> After that, "iw dev xxx station dump" show the correct signal strength.
> Such as:
> 
> Station 00:03:7f:12:03:03 (on wlo1)
>         inactive time:  36 ms
>         rx bytes:       61571
>         rx packets:     336
>         tx bytes:       28204
>         tx packets:     205
>         tx retries:     49
>         tx failed:      0
>         beacon loss:    0
>         beacon rx:      83
>         rx drop misc:   66
>         signal:         -24 dBm
>         beacon signal avg:      -22 dBm
> 
> For WCN7850, the firmware supports db2dbm, so not need to add noise floor.
> For QCN9274, the firmware not support db2dbm, so need to add noise floor.
> 
> This patch affects the station mode of WCN7850 and QCN9274.
> 
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.2.1-00201-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Lingbo Kong <quic_lingbok at quicinc.com>
> ---
>  drivers/net/wireless/ath/ath12k/core.h |   2 +
>  drivers/net/wireless/ath/ath12k/mac.c  |  56 ++++++++++-
>  drivers/net/wireless/ath/ath12k/wmi.c  | 130 +++++++++++++++++++++++++
>  drivers/net/wireless/ath/ath12k/wmi.h  |  48 +++++++++
>  4 files changed, 234 insertions(+), 2 deletions(-)
[...]
> diff --git a/drivers/net/wireless/ath/ath12k/wmi.h b/drivers/net/wireless/ath/ath12k/wmi.h
> index 78afc94a815d..9016eda03d57 100644
> --- a/drivers/net/wireless/ath/ath12k/wmi.h
> +++ b/drivers/net/wireless/ath/ath12k/wmi.h
> @@ -4811,6 +4811,52 @@ struct wmi_twt_disable_event {
>  	__le32 status;
>  } __packed;
>  
> +struct wmi_stats_event {
> +	__le32 stats_id;
> +	__le32 num_pdev_stats;
> +	__le32 num_vdev_stats;
> +	__le32 num_peer_stats;
> +	__le32 num_bcnflt_stats;
> +	__le32 num_chan_stats;
> +	__le32 num_mib_stats;
> +	__le32 pdev_id;
> +	__le32 num_bcn_stats;
> +	__le32 num_peer_extd_stats;
> +	__le32 num_peer_extd2_stats;
> +} __packed;
> +
> +enum wmi_stats_id {
> +	WMI_REQUEST_VDEV_STAT	= BIT(3),
> +};
> +
> +struct wmi_request_stats_cmd {
> +	__le32 tlv_header;
> +	__le32 stats_id;
> +	__le32 vdev_id;
> +	struct ath12k_wmi_mac_addr_params peer_macaddr;
> +	__le32 pdev_id;
> +} __packed;
> +
> +#define WLAN_MAX_AC 4
> +#define MAX_TX_RATE_VALUES 10
> +
> +struct ath12k_wmi_vdev_stats {

this name does not conform to the "Naming conventions for structures" outlined
at the beginning of the file:
 * _params is a structure which is embedded either into _cmd or _event (or
 * both), it is not sent individually.

> +	__le32 vdev_id;
> +	__le32 beacon_snr;
> +	__le32 data_snr;
> +	__le32 num_tx_frames[WLAN_MAX_AC];
> +	__le32 num_rx_frames;
> +	__le32 num_tx_frames_retries[WLAN_MAX_AC];
> +	__le32 num_tx_frames_failures[WLAN_MAX_AC];
> +	__le32 num_rts_fail;
> +	__le32 num_rts_success;
> +	__le32 num_rx_err;
> +	__le32 num_rx_discard;
> +	__le32 num_tx_not_acked;
> +	__le32 tx_rate_history[MAX_TX_RATE_VALUES];
> +	__le32 beacon_rssi_history[MAX_TX_RATE_VALUES];
> +} __packed;