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ath9k: add support for DFS master mode

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These are the remaining knobs in ath9k to support DFS:
* mark AR9280 and AR9580 as DFS tested
* synchronize DFS regulatory domain to reg notifyer
* set required RX filter flags for radar detection
* process radar PHY errors at DFS detector
* notify DFS master on radar detection

DFS support requires CONFIG_ATH9K_DFS_CERTIFIED to be set.

Signed-off-by: Zefir Kurtisi <zefir.kurtisi@neratec.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Zefir Kurtisi 2013-04-03 18:31:31 +02:00 committed by John W. Linville
parent e39282ee1b
commit 73e4937d48
5 changed files with 35 additions and 6 deletions
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4
drivers/net/wireless/ath/ath9k/dfs.c
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@ -193,9 +193,7 @@ void ath9k_dfs_process_phyerr(struct ath_softc *sc, void *data,
DFS_STAT_INC(sc, pulses_processed);
if (pd != NULL && pd->add_pulse(pd, &pe)) {
DFS_STAT_INC(sc, radar_detected);
/*
* TODO: forward radar event to DFS management layer
*/
ieee80211_radar_detected(sc->hw);
}
}
}

3
drivers/net/wireless/ath/ath9k/hw.c
View File

@ -2380,8 +2380,11 @@ static bool ath9k_hw_dfs_tested(struct ath_hw *ah)
{
switch (ah->hw_version.macVersion) {
/* for temporary testing DFS with 9280 */
case AR_SREV_VERSION_9280:
/* AR9580 will likely be our first target to get testing on */
case AR_SREV_VERSION_9580:
return true;
default:
return false;
}

4
drivers/net/wireless/ath/ath9k/init.c
View File

@ -319,6 +319,10 @@ static void ath9k_reg_notifier(struct wiphy *wiphy,
ath9k_ps_wakeup(sc);
ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit, false);
sc->curtxpow = ath9k_hw_regulatory(ah)->power_limit;
/* synchronize DFS detector if regulatory domain changed */
if (sc->dfs_detector != NULL)
sc->dfs_detector->set_dfs_domain(sc->dfs_detector,
request->dfs_region);
ath9k_ps_restore(sc);
}
}

23
drivers/net/wireless/ath/ath9k/main.c
View File

@ -1245,10 +1245,27 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
if (old_pos >= 0)
ath_update_survey_nf(sc, old_pos);
/* perform spectral scan if requested. */
if (sc->scanning && sc->spectral_mode == SPECTRAL_CHANSCAN)
ath9k_spectral_scan_trigger(hw);
/*
* Enable radar pulse detection if on a DFS channel. Spectral
* scanning and radar detection can not be used concurrently.
*/
if (hw->conf.radar_enabled) {
u32 rxfilter;
/* set HW specific DFS configuration */
ath9k_hw_set_radar_params(ah);
rxfilter = ath9k_hw_getrxfilter(ah);
rxfilter |= ATH9K_RX_FILTER_PHYRADAR |
ATH9K_RX_FILTER_PHYERR;
ath9k_hw_setrxfilter(ah, rxfilter);
ath_dbg(common, DFS, "DFS enabled at freq %d\n",
curchan->center_freq);
} else {
/* perform spectral scan if requested. */
if (sc->scanning &&
sc->spectral_mode == SPECTRAL_CHANSCAN)
ath9k_spectral_scan_trigger(hw);
}
}
if (changed & IEEE80211_CONF_CHANGE_POWER) {

7
drivers/net/wireless/ath/ath9k/recv.c
View File

@ -381,6 +381,10 @@ u32 ath_calcrxfilter(struct ath_softc *sc)
rfilt = ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST
| ATH9K_RX_FILTER_MCAST;
/* if operating on a DFS channel, enable radar pulse detection */
if (sc->hw->conf.radar_enabled)
rfilt |= ATH9K_RX_FILTER_PHYRADAR | ATH9K_RX_FILTER_PHYERR;
if (sc->rx.rxfilter & FIF_PROBE_REQ)
rfilt |= ATH9K_RX_FILTER_PROBEREQ;
@ -1228,6 +1232,9 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
unlikely(tsf_lower - rs.rs_tstamp > 0x10000000))
rxs->mactime += 0x100000000ULL;
if (rs.rs_phyerr == ATH9K_PHYERR_RADAR)
ath9k_dfs_process_phyerr(sc, hdr, &rs, rxs->mactime);
if (rs.rs_status & ATH9K_RXERR_PHY) {
if (ath_process_fft(sc, hdr, &rs, rxs->mactime)) {
RX_STAT_INC(rx_spectral);