diff mbox series

[v2,2/8] wifi: rtw88: add port switch for AP mode

Message ID 20230414121135.17828-3-pkshih@realtek.com (mailing list archive)
State Accepted
Commit ccf73f6e69c0244a979e97eb6c38f80cd6cbc116
Delegated to: Kalle Valo
Headers show
Series wifi: rtw88: support single channel concurrency | expand

Commit Message

Ping-Ke Shih April 14, 2023, 12:11 p.m. UTC 
From: Po-Hao Huang <phhuang@realtek.com>

Switch port settings if AP mode does not start on port 0 because of
hardware limitation. For some ICs, beacons on ports other than zero
could misbehave and do not issue properly, to fix this we change AP
VIFs to port zero when multiple interfaces is active.

Signed-off-by: Po-Hao Huang <phhuang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
v2: use rtw_dbg() instead to show message of switching port
---
 drivers/net/wireless/realtek/rtw88/mac80211.c |  1 +
 drivers/net/wireless/realtek/rtw88/main.c     | 79 +++++++++++++++++++
 drivers/net/wireless/realtek/rtw88/main.h     |  1 +
 3 files changed, 81 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/wireless/realtek/rtw88/mac80211.c b/drivers/net/wireless/realtek/rtw88/mac80211.c
index d026094a72c40..19c4d7c29759e 100644
--- a/drivers/net/wireless/realtek/rtw88/mac80211.c
+++ b/drivers/net/wireless/realtek/rtw88/mac80211.c
@@ -212,6 +212,7 @@  static int rtw_ops_add_interface(struct ieee80211_hw *hw,
 	rtwvif->bcn_ctrl = bcn_ctrl;
 	config |= PORT_SET_BCN_CTRL;
 	rtw_vif_port_config(rtwdev, rtwvif, config);
+	rtw_core_port_switch(rtwdev, vif);
 
 	mutex_unlock(&rtwdev->mutex);
 
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index 9fe7e22e31ce2..abebccd0581a2 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -2251,6 +2251,85 @@  void rtw_unregister_hw(struct rtw_dev *rtwdev, struct ieee80211_hw *hw)
 }
 EXPORT_SYMBOL(rtw_unregister_hw);
 
+static
+void rtw_swap_reg_nbytes(struct rtw_dev *rtwdev, const struct rtw_hw_reg *reg1,
+			 const struct rtw_hw_reg *reg2, u8 nbytes)
+{
+	u8 i;
+
+	for (i = 0; i < nbytes; i++) {
+		u8 v1 = rtw_read8(rtwdev, reg1->addr + i);
+		u8 v2 = rtw_read8(rtwdev, reg2->addr + i);
+
+		rtw_write8(rtwdev, reg1->addr + i, v2);
+		rtw_write8(rtwdev, reg2->addr + i, v1);
+	}
+}
+
+static
+void rtw_swap_reg_mask(struct rtw_dev *rtwdev, const struct rtw_hw_reg *reg1,
+		       const struct rtw_hw_reg *reg2)
+{
+	u32 v1, v2;
+
+	v1 = rtw_read32_mask(rtwdev, reg1->addr, reg1->mask);
+	v2 = rtw_read32_mask(rtwdev, reg2->addr, reg2->mask);
+	rtw_write32_mask(rtwdev, reg2->addr, reg2->mask, v1);
+	rtw_write32_mask(rtwdev, reg1->addr, reg1->mask, v2);
+}
+
+struct rtw_iter_port_switch_data {
+	struct rtw_dev *rtwdev;
+	struct rtw_vif *rtwvif_ap;
+};
+
+static void rtw_port_switch_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
+{
+	struct rtw_iter_port_switch_data *iter_data = data;
+	struct rtw_dev *rtwdev = iter_data->rtwdev;
+	struct rtw_vif *rtwvif_target = (struct rtw_vif *)vif->drv_priv;
+	struct rtw_vif *rtwvif_ap = iter_data->rtwvif_ap;
+	const struct rtw_hw_reg *reg1, *reg2;
+
+	if (rtwvif_target->port != RTW_PORT_0)
+		return;
+
+	rtw_dbg(rtwdev, RTW_DBG_STATE, "AP port switch from %d -> %d\n",
+		rtwvif_ap->port, rtwvif_target->port);
+
+	reg1 = &rtwvif_ap->conf->net_type;
+	reg2 = &rtwvif_target->conf->net_type;
+	rtw_swap_reg_mask(rtwdev, reg1, reg2);
+
+	reg1 = &rtwvif_ap->conf->mac_addr;
+	reg2 = &rtwvif_target->conf->mac_addr;
+	rtw_swap_reg_nbytes(rtwdev, reg1, reg2, ETH_ALEN);
+
+	reg1 = &rtwvif_ap->conf->bssid;
+	reg2 = &rtwvif_target->conf->bssid;
+	rtw_swap_reg_nbytes(rtwdev, reg1, reg2, ETH_ALEN);
+
+	reg1 = &rtwvif_ap->conf->bcn_ctrl;
+	reg2 = &rtwvif_target->conf->bcn_ctrl;
+	rtw_swap_reg_nbytes(rtwdev, reg1, reg2, 1);
+
+	swap(rtwvif_target->port, rtwvif_ap->port);
+	swap(rtwvif_target->conf, rtwvif_ap->conf);
+}
+
+void rtw_core_port_switch(struct rtw_dev *rtwdev, struct ieee80211_vif *vif)
+{
+	struct rtw_vif *rtwvif = (struct rtw_vif *)vif->drv_priv;
+	struct rtw_iter_port_switch_data iter_data;
+
+	if (vif->type != NL80211_IFTYPE_AP || rtwvif->port == RTW_PORT_0)
+		return;
+
+	iter_data.rtwdev = rtwdev;
+	iter_data.rtwvif_ap = rtwvif;
+	rtw_iterate_vifs(rtwdev, rtw_port_switch_iter, &iter_data);
+}
+
 MODULE_AUTHOR("Realtek Corporation");
 MODULE_DESCRIPTION("Realtek 802.11ac wireless core module");
 MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h
index efac271497f5b..790ebf781bc41 100644
--- a/drivers/net/wireless/realtek/rtw88/main.h
+++ b/drivers/net/wireless/realtek/rtw88/main.h
@@ -2198,4 +2198,5 @@  void rtw_set_txrx_1ss(struct rtw_dev *rtwdev, bool config_1ss);
 void rtw_update_channel(struct rtw_dev *rtwdev, u8 center_channel,
 			u8 primary_channel, enum rtw_supported_band band,
 			enum rtw_bandwidth bandwidth);
+void rtw_core_port_switch(struct rtw_dev *rtwdev, struct ieee80211_vif *vif);
 #endif