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wcn36xx: Add SNR reporting via get_survey()

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Add support for get_survey() reporting. Current channel and noise-floor are
reported, other parameters such as scan, busy, TX and RX time are not
immediately available.

Noise is a useful metric to report, so bring it out now.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220115001646.3981501-5-bryan.odonoghue@linaro.org
This commit is contained in:
Bryan O'Donoghue
2022-01-15 00:16:46 +00:00
committed by Kalle Valo
parent 29696e0aa4
commit 51395cf204
1 changed files with 44 additions and 0 deletions
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44
drivers/net/wireless/ath/wcn36xx/main.c
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@@ -1357,6 +1357,49 @@ static void wcn36xx_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
}
}
static int wcn36xx_get_survey(struct ieee80211_hw *hw, int idx,
struct survey_info *survey)
{
struct wcn36xx *wcn = hw->priv;
struct ieee80211_supported_band *sband;
struct wcn36xx_chan_survey *chan_survey;
int band_idx;
unsigned long flags;
sband = wcn->hw->wiphy->bands[NL80211_BAND_2GHZ];
band_idx = idx;
if (band_idx >= sband->n_channels) {
band_idx -= sband->n_channels;
sband = wcn->hw->wiphy->bands[NL80211_BAND_5GHZ];
}
if (!sband || band_idx >= sband->n_channels)
return -ENOENT;
spin_lock_irqsave(&wcn->survey_lock, flags);
chan_survey = &wcn->chan_survey[idx];
survey->channel = &sband->channels[band_idx];
survey->noise = chan_survey->rssi - chan_survey->snr;
survey->filled = 0;
if (chan_survey->rssi > -100 && chan_survey->rssi < 0)
survey->filled |= SURVEY_INFO_NOISE_DBM;
if (survey->channel == wcn->channel)
survey->filled |= SURVEY_INFO_IN_USE;
spin_unlock_irqrestore(&wcn->survey_lock, flags);
wcn36xx_dbg(WCN36XX_DBG_MAC,
"ch %d rssi %d snr %d noise %d filled %x freq %d\n",
HW_VALUE_CHANNEL(survey->channel->hw_value),
chan_survey->rssi, chan_survey->snr, survey->noise,
survey->filled, survey->channel->center_freq);
return 0;
}
static const struct ieee80211_ops wcn36xx_ops = {
.start = wcn36xx_start,
.stop = wcn36xx_stop,
@@ -1385,6 +1428,7 @@ static const struct ieee80211_ops wcn36xx_ops = {
.ipv6_addr_change = wcn36xx_ipv6_addr_change,
#endif
.flush = wcn36xx_flush,
.get_survey = wcn36xx_get_survey,
CFG80211_TESTMODE_CMD(wcn36xx_tm_cmd)
};