ath9k: add support for DFS master mode
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>
diff --git a/drivers/net/wireless/ath/ath9k/dfs.c b/drivers/net/wireless/ath/ath9k/dfs.c
index ecc8179..508f8b3 100644
--- a/drivers/net/wireless/ath/ath9k/dfs.c
+++ b/drivers/net/wireless/ath/ath9k/dfs.c
@@ -193,9 +193,7 @@
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);
}
}
}
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 4fa2bb1..3473a79 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2380,8 +2380,11 @@
{
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;
}
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 385c59a..3be2eb0 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -319,6 +319,10 @@
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);
}
}
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 24650fd4..2d25148 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1245,10 +1245,27 @@
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) {
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index ee156e5..ee7ca5a 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -381,6 +381,10 @@
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 @@
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);