wifi: rtw89: add skeleton of mac80211 chanctx ops support

Support mac80211 chanctx series ops. Still, currently support
single channel. Based on this premise, things should be similar
to before. So, we haven't dealt with relationship between vif
and chanctx in depth. Instead, we leave both ::assign_vif()
and ::unassign_vif() as noops for now.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220809104952.61355-12-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/chan.c

@@ -179,3 +179,56 @@ enum rtw89_entity_mode rtw89_entity_recalc(struct rtw89_dev *rtwdev)
 	rtw89_set_entity_mode(rtwdev, mode);
 	return mode;
 }
+
+int rtw89_chanctx_ops_add(struct rtw89_dev *rtwdev,
+			  struct ieee80211_chanctx_conf *ctx)
+{
+	struct rtw89_hal *hal = &rtwdev->hal;
+	struct rtw89_chanctx_cfg *cfg = (struct rtw89_chanctx_cfg *)ctx->drv_priv;
+	u8 idx;
+
+	idx = find_first_zero_bit(hal->entity_map, NUM_OF_RTW89_SUB_ENTITY);
+	if (idx > RTW89_SUB_ENTITY_0)
+		return -ENOENT;
+
+	rtw89_config_entity_chandef(rtwdev, idx, &ctx->def);
+	rtw89_set_channel(rtwdev);
+	cfg->idx = idx;
+	return 0;
+}
+
+void rtw89_chanctx_ops_remove(struct rtw89_dev *rtwdev,
+			      struct ieee80211_chanctx_conf *ctx)
+{
+	struct rtw89_hal *hal = &rtwdev->hal;
+	struct rtw89_chanctx_cfg *cfg = (struct rtw89_chanctx_cfg *)ctx->drv_priv;
+
+	clear_bit(cfg->idx, hal->entity_map);
+	rtw89_set_channel(rtwdev);
+}
+
+void rtw89_chanctx_ops_change(struct rtw89_dev *rtwdev,
+			      struct ieee80211_chanctx_conf *ctx,
+			      u32 changed)
+{
+	struct rtw89_chanctx_cfg *cfg = (struct rtw89_chanctx_cfg *)ctx->drv_priv;
+	u8 idx = cfg->idx;
+
+	if (changed & IEEE80211_CHANCTX_CHANGE_WIDTH) {
+		rtw89_config_entity_chandef(rtwdev, idx, &ctx->def);
+		rtw89_set_channel(rtwdev);
+	}
+}
+
+int rtw89_chanctx_ops_assign_vif(struct rtw89_dev *rtwdev,
+				 struct rtw89_vif *rtwvif,
+				 struct ieee80211_chanctx_conf *ctx)
+{
+	return 0;
+}
+
+void rtw89_chanctx_ops_unassign_vif(struct rtw89_dev *rtwdev,
+				    struct rtw89_vif *rtwvif,
+				    struct ieee80211_chanctx_conf *ctx)
+{
+}

drivers/net/wireless/realtek/rtw89/chan.h

@@ -47,5 +47,18 @@ void rtw89_config_entity_chandef(struct rtw89_dev *rtwdev,
 				 const struct cfg80211_chan_def *chandef);
 void rtw89_entity_init(struct rtw89_dev *rtwdev);
 enum rtw89_entity_mode rtw89_entity_recalc(struct rtw89_dev *rtwdev);
+int rtw89_chanctx_ops_add(struct rtw89_dev *rtwdev,
+			  struct ieee80211_chanctx_conf *ctx);
+void rtw89_chanctx_ops_remove(struct rtw89_dev *rtwdev,
+			      struct ieee80211_chanctx_conf *ctx);
+void rtw89_chanctx_ops_change(struct rtw89_dev *rtwdev,
+			      struct ieee80211_chanctx_conf *ctx,
+			      u32 changed);
+int rtw89_chanctx_ops_assign_vif(struct rtw89_dev *rtwdev,
+				 struct rtw89_vif *rtwvif,
+				 struct ieee80211_chanctx_conf *ctx);
+void rtw89_chanctx_ops_unassign_vif(struct rtw89_dev *rtwdev,
+				    struct rtw89_vif *rtwvif,
+				    struct ieee80211_chanctx_conf *ctx);
 
 #endif

drivers/net/wireless/realtek/rtw89/core.c

@@ -3114,6 +3114,7 @@ static int rtw89_core_register_hw(struct rtw89_dev *rtwdev)
 	hw->vif_data_size = sizeof(struct rtw89_vif);
 	hw->sta_data_size = sizeof(struct rtw89_sta);
 	hw->txq_data_size = sizeof(struct rtw89_txq);
+	hw->chanctx_data_size = sizeof(struct rtw89_chanctx_cfg);
 
 	SET_IEEE80211_PERM_ADDR(hw, efuse->addr);
 

drivers/net/wireless/realtek/rtw89/core.h

@@ -2623,6 +2623,10 @@ struct rtw89_sar_info {
 	};
 };
 
+struct rtw89_chanctx_cfg {
+	enum rtw89_sub_entity_idx idx;
+};
+
 enum rtw89_entity_mode {
 	RTW89_ENTITY_MODE_SCC,
 };

drivers/net/wireless/realtek/rtw89/mac80211.c

@@ -777,6 +777,69 @@ static void rtw89_ops_sta_rc_update(struct ieee80211_hw *hw,
 	rtw89_phy_ra_updata_sta(rtwdev, sta, changed);
 }
 
+static int rtw89_ops_add_chanctx(struct ieee80211_hw *hw,
+				 struct ieee80211_chanctx_conf *ctx)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	int ret;
+
+	mutex_lock(&rtwdev->mutex);
+	ret = rtw89_chanctx_ops_add(rtwdev, ctx);
+	mutex_unlock(&rtwdev->mutex);
+
+	return ret;
+}
+
+static void rtw89_ops_remove_chanctx(struct ieee80211_hw *hw,
+				     struct ieee80211_chanctx_conf *ctx)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	mutex_lock(&rtwdev->mutex);
+	rtw89_chanctx_ops_remove(rtwdev, ctx);
+	mutex_unlock(&rtwdev->mutex);
+}
+
+static void rtw89_ops_change_chanctx(struct ieee80211_hw *hw,
+				     struct ieee80211_chanctx_conf *ctx,
+				     u32 changed)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+
+	mutex_lock(&rtwdev->mutex);
+	rtw89_chanctx_ops_change(rtwdev, ctx, changed);
+	mutex_unlock(&rtwdev->mutex);
+}
+
+static int rtw89_ops_assign_vif_chanctx(struct ieee80211_hw *hw,
+					struct ieee80211_vif *vif,
+					struct ieee80211_bss_conf *link_conf,
+					struct ieee80211_chanctx_conf *ctx)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	struct rtw89_vif *rtwvif = (struct rtw89_vif *)vif->drv_priv;
+	int ret;
+
+	mutex_lock(&rtwdev->mutex);
+	ret = rtw89_chanctx_ops_assign_vif(rtwdev, rtwvif, ctx);
+	mutex_unlock(&rtwdev->mutex);
+
+	return ret;
+}
+
+static void rtw89_ops_unassign_vif_chanctx(struct ieee80211_hw *hw,
+					   struct ieee80211_vif *vif,
+					   struct ieee80211_bss_conf *link_conf,
+					   struct ieee80211_chanctx_conf *ctx)
+{
+	struct rtw89_dev *rtwdev = hw->priv;
+	struct rtw89_vif *rtwvif = (struct rtw89_vif *)vif->drv_priv;
+
+	mutex_lock(&rtwdev->mutex);
+	rtw89_chanctx_ops_unassign_vif(rtwdev, rtwvif, ctx);
+	mutex_unlock(&rtwdev->mutex);
+}
+
 const struct ieee80211_ops rtw89_ops = {
 	.tx			= rtw89_ops_tx,
 	.wake_tx_queue		= rtw89_ops_wake_tx_queue,
@@ -805,6 +868,11 @@ const struct ieee80211_ops rtw89_ops = {
 	.reconfig_complete	= rtw89_ops_reconfig_complete,
 	.hw_scan		= rtw89_ops_hw_scan,
 	.cancel_hw_scan		= rtw89_ops_cancel_hw_scan,
+	.add_chanctx		= rtw89_ops_add_chanctx,
+	.remove_chanctx		= rtw89_ops_remove_chanctx,
+	.change_chanctx		= rtw89_ops_change_chanctx,
+	.assign_vif_chanctx	= rtw89_ops_assign_vif_chanctx,
+	.unassign_vif_chanctx	= rtw89_ops_unassign_vif_chanctx,
 	.set_sar_specs		= rtw89_ops_set_sar_specs,
 	.sta_rc_update		= rtw89_ops_sta_rc_update,
 };