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From:   Manish Dharanenthiran <quic_mdharane@quicinc.com>
To:     <ath12k@lists.infradead.org>
CC:     <linux-wireless@vger.kernel.org>,
        Manish Dharanenthiran <quic_mdharane@quicinc.com>
Subject: [PATCH 2/2] wifi: ath12k: fix radar detection in 160 MHz
Date:   Wed, 2 Aug 2023 14:28:52 +0530
Message-ID: <20230802085852.19821-3-quic_mdharane@quicinc.com>
In-Reply-To: <20230802085852.19821-1-quic_mdharane@quicinc.com>
References: <20230802085852.19821-1-quic_mdharane@quicinc.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

Radar detection fails in the secondary 80 MHz when the
the AP's primary 80 MHz is in non-DFS region in 160 MHz.

This is due to WMI channel flag WMI_CHAN_INFO_DFS_FREQ2 is not set
properly in case of the primary 80 MHz is in non-DFS region.
HALPHY detects the radar pulses in the secondary 80 MHz only when
WMI_CHAN_INFO_DFS_FREQ2 is set.

Fix this issue by setting WMI channel flag WMI_CHAN_INFO_DFS_FREQ2
based on the radar_enabled flag from the channel context.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1

Signed-off-by: Manish Dharanenthiran <quic_mdharane@quicinc.com>
---
 drivers/net/wireless/ath/ath12k/mac.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index 0ab95e138d1d..78177861e38f 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -5450,12 +5450,13 @@ static void ath12k_mac_op_remove_chanctx(struct ieee80211_hw *hw,
 
 static int
 ath12k_mac_vdev_start_restart(struct ath12k_vif *arvif,
-			      const struct cfg80211_chan_def *chandef,
+			      struct ieee80211_chanctx_conf *ctx,
 			      bool restart)
 {
 	struct ath12k *ar = arvif->ar;
 	struct ath12k_base *ab = ar->ab;
 	struct wmi_vdev_start_req_arg arg = {};
+	const struct cfg80211_chan_def *chandef = &ctx->def;
 	int he_support = arvif->vif->bss_conf.he_support;
 	int ret;
 
@@ -5488,6 +5489,8 @@ ath12k_mac_vdev_start_restart(struct ath12k_vif *arvif,
 		/* For now allow DFS for AP mode */
 		arg.chan_radar = !!(chandef->chan->flags & IEEE80211_CHAN_RADAR);
 
+		arg.freq2_radar = ctx->radar_enabled;
+
 		arg.passive = arg.chan_radar;
 
 		spin_lock_bh(&ab->base_lock);
@@ -5595,15 +5598,15 @@ static int ath12k_mac_vdev_stop(struct ath12k_vif *arvif)
 }
 
 static int ath12k_mac_vdev_start(struct ath12k_vif *arvif,
-				 const struct cfg80211_chan_def *chandef)
+				 struct ieee80211_chanctx_conf *ctx)
 {
-	return ath12k_mac_vdev_start_restart(arvif, chandef, false);
+	return ath12k_mac_vdev_start_restart(arvif, ctx, false);
 }
 
 static int ath12k_mac_vdev_restart(struct ath12k_vif *arvif,
-				   const struct cfg80211_chan_def *chandef)
+				   struct ieee80211_chanctx_conf *ctx)
 {
-	return ath12k_mac_vdev_start_restart(arvif, chandef, true);
+	return ath12k_mac_vdev_start_restart(arvif, ctx, true);
 }
 
 struct ath12k_mac_change_chanctx_arg {
@@ -5702,7 +5705,7 @@ ath12k_mac_update_vif_chan(struct ath12k *ar,
 		 * If vdev is down then it expect vdev_stop->vdev_start.
 		 */
 		if (arvif->is_up) {
-			ret = ath12k_mac_vdev_restart(arvif, &vifs[i].new_ctx->def);
+			ret = ath12k_mac_vdev_restart(arvif, vifs[i].new_ctx);
 			if (ret) {
 				ath12k_warn(ab, "failed to restart vdev %d: %d\n",
 					    arvif->vdev_id, ret);
@@ -5716,7 +5719,7 @@ ath12k_mac_update_vif_chan(struct ath12k *ar,
 				continue;
 			}
 
-			ret = ath12k_mac_vdev_start(arvif, &vifs[i].new_ctx->def);
+			ret = ath12k_mac_vdev_start(arvif, vifs[i].new_ctx);
 			if (ret)
 				ath12k_warn(ab, "failed to start vdev %d: %d\n",
 					    arvif->vdev_id, ret);
@@ -5792,7 +5795,8 @@ static void ath12k_mac_op_change_chanctx(struct ieee80211_hw *hw,
 	if (WARN_ON(changed & IEEE80211_CHANCTX_CHANGE_CHANNEL))
 		goto unlock;
 
-	if (changed & IEEE80211_CHANCTX_CHANGE_WIDTH)
+	if (changed & IEEE80211_CHANCTX_CHANGE_WIDTH ||
+	    changed & IEEE80211_CHANCTX_CHANGE_RADAR)
 		ath12k_mac_update_active_vif_chan(ar, ctx);
 
 	/* TODO: Recalc radar detection */
@@ -5812,7 +5816,7 @@ static int ath12k_start_vdev_delay(struct ieee80211_hw *hw,
 	if (WARN_ON(arvif->is_started))
 		return -EBUSY;
 
-	ret = ath12k_mac_vdev_start(arvif, &arvif->chanctx.def);
+	ret = ath12k_mac_vdev_start(arvif, &arvif->chanctx);
 	if (ret) {
 		ath12k_warn(ab, "failed to start vdev %i addr %pM on freq %d: %d\n",
 			    arvif->vdev_id, vif->addr,
@@ -5890,7 +5894,7 @@ ath12k_mac_op_assign_vif_chanctx(struct ieee80211_hw *hw,
 		goto out;
 	}
 
-	ret = ath12k_mac_vdev_start(arvif, &ctx->def);
+	ret = ath12k_mac_vdev_start(arvif, ctx);
 	if (ret) {
 		ath12k_warn(ab, "failed to start vdev %i addr %pM on freq %d: %d\n",
 			    arvif->vdev_id, vif->addr,
-- 
2.17.1