ath10k: implement AP CSA

Most channel switching logic has been implemented
already so this patch is pretty small. The patch
makes use of mac80211's vif->csa_active for AP CSA
handling.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

2 files changed, 21 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 8fe451796fde..4bf5f19602e4 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3818,6 +3818,14 @@ static int ath10k_set_bitrate_mask(struct ieee80211_hw *hw,
         return ath10k_set_fixed_rate_param(arvif, fixed_rate, fixed_nss);
 }
 
+static void ath10k_channel_switch_beacon(struct ieee80211_hw *hw,
+                                         struct ieee80211_vif *vif,
+                                         struct cfg80211_chan_def *chandef)
+{
+        /* there's no need to do anything here. vif->csa_active is enough */
+        return;
+}
+
 static const struct ieee80211_ops ath10k_ops = {
         .tx                             = ath10k_tx,
         .start                          = ath10k_start,
@@ -3841,6 +3849,7 @@ static const struct ieee80211_ops ath10k_ops = {
         .restart_complete               = ath10k_restart_complete,
         .get_survey                     = ath10k_get_survey,
         .set_bitrate_mask               = ath10k_set_bitrate_mask,
+        .channel_switch_beacon          = ath10k_channel_switch_beacon,
 #ifdef CONFIG_PM
         .suspend                        = ath10k_suspend,
         .resume                         = ath10k_resume,
@@ -4220,6 +4229,7 @@ int ath10k_mac_register(struct ath10k *ar)
         ar->hw->max_listen_interval = ATH10K_MAX_HW_LISTEN_INTERVAL;
 
         ar->hw->wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
+        ar->hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
         ar->hw->wiphy->max_remain_on_channel_duration = 5000;
 
         ar->hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index f0969cd8350f..a1ec5d0fb0ef 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -1405,6 +1405,17 @@ static void ath10k_wmi_event_host_swba(struct ath10k *ar, struct sk_buff *skb)
                         continue;
                 }
 
+                /* There are no completions for beacons so wait for next SWBA
+                 * before telling mac80211 to decrement CSA counter
+                 *
+                 * Once CSA counter is completed stop sending beacons until
+                 * actual channel switch is done */
+                if (arvif->vif->csa_active &&
+                    ieee80211_csa_is_complete(arvif->vif)) {
+                        ieee80211_csa_finish(arvif->vif);
+                        continue;
+                }
+
                 bcn = ieee80211_beacon_get(ar->hw, arvif->vif);
                 if (!bcn) {
                         ath10k_warn("could not get mac80211 beacon\n");