wifi: rtw88: assign mac_id for vif/sta and update to TX desc

A mac_id as an instance in firmware has to be assigned for each station
including AP and connected stations. Firmware will use the mac_id to
control TX rate and do statistics.

Assignment rule is to assign mac_id to each vif when adding vif.
For station mode, sta->mac_id will reuse vif->mac_id. For AP mode,
dynamically allocate an sta->mac_id to a station, and vif->mac_id is
used to send broadcast/multicast packets which are not belong to
a station. For example,

                  vif->mac_id      sta->mac_id
vif0 (STA mode)        0               0
vif1 (AP mode)         1               2...

By the way, remove unused RTW_BC_MC_MACID, which was planed to send
broadcast/multicast packets on fixed mac_id.

Tested-on RTL8822CE with STA + AP SCC mode.

Link: https://lore.kernel.org/linux-wireless/e4be0a75-43b2-4ae5-9aab-5c4a88e78097@gmail.com/
Cc: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20240819025248.17939-1-pkshih@realtek.com
(cherry picked from commit 902cb7b11f9a7ff07233cc4c626b54c3e4703149)

drivers/net/wireless/realtek/rtw88/mac80211.c

@@ -168,6 +168,12 @@ static int rtw_ops_add_interface(struct ieee80211_hw *hw,
 
 	mutex_lock(&rtwdev->mutex);
 
+	rtwvif->mac_id = rtw_acquire_macid(rtwdev);
+	if (rtwvif->mac_id >= RTW_MAX_MAC_ID_NUM) {
+		mutex_unlock(&rtwdev->mutex);
+		return -ENOSPC;
+	}
+
 	port = find_first_zero_bit(rtwdev->hw_port, RTW_PORT_NUM);
 	if (port >= RTW_PORT_NUM) {
 		mutex_unlock(&rtwdev->mutex);
@@ -215,7 +221,8 @@ static int rtw_ops_add_interface(struct ieee80211_hw *hw,
 
 	mutex_unlock(&rtwdev->mutex);
 
-	rtw_dbg(rtwdev, RTW_DBG_STATE, "start vif %pM on port %d\n", vif->addr, rtwvif->port);
+	rtw_dbg(rtwdev, RTW_DBG_STATE, "start vif %pM mac_id %d on port %d\n",
+		vif->addr, rtwvif->mac_id, rtwvif->port);
 	return 0;
 }
 
@@ -226,7 +233,8 @@ static void rtw_ops_remove_interface(struct ieee80211_hw *hw,
 	struct rtw_vif *rtwvif = (struct rtw_vif *)vif->drv_priv;
 	u32 config = 0;
 
-	rtw_dbg(rtwdev, RTW_DBG_STATE, "stop vif %pM on port %d\n", vif->addr, rtwvif->port);
+	rtw_dbg(rtwdev, RTW_DBG_STATE, "stop vif %pM mac_id %d on port %d\n",
+		vif->addr, rtwvif->mac_id, rtwvif->port);
 
 	mutex_lock(&rtwdev->mutex);
 
@@ -243,6 +251,7 @@ static void rtw_ops_remove_interface(struct ieee80211_hw *hw,
 	config |= PORT_SET_BCN_CTRL;
 	rtw_vif_port_config(rtwdev, rtwvif, config);
 	clear_bit(rtwvif->port, rtwdev->hw_port);
+	rtw_release_macid(rtwdev, rtwvif->mac_id);
 	rtw_recalc_lps(rtwdev, NULL);
 
 	mutex_unlock(&rtwdev->mutex);

drivers/net/wireless/realtek/rtw88/main.c

@@ -306,17 +306,6 @@ static void rtw_ips_work(struct work_struct *work)
 	mutex_unlock(&rtwdev->mutex);
 }
 
-static u8 rtw_acquire_macid(struct rtw_dev *rtwdev)
-{
-	unsigned long mac_id;
-
-	mac_id = find_first_zero_bit(rtwdev->mac_id_map, RTW_MAX_MAC_ID_NUM);
-	if (mac_id < RTW_MAX_MAC_ID_NUM)
-		set_bit(mac_id, rtwdev->mac_id_map);
-
-	return mac_id;
-}
-
 static void rtw_sta_rc_work(struct work_struct *work)
 {
 	struct rtw_sta_info *si = container_of(work, struct rtw_sta_info,
@@ -335,12 +324,14 @@ int rtw_sta_add(struct rtw_dev *rtwdev, struct ieee80211_sta *sta,
 	struct rtw_vif *rtwvif = (struct rtw_vif *)vif->drv_priv;
 	int i;
 
-	si->mac_id = rtw_acquire_macid(rtwdev);
-	if (si->mac_id >= RTW_MAX_MAC_ID_NUM)
-		return -ENOSPC;
+	if (vif->type == NL80211_IFTYPE_STATION) {
+		si->mac_id = rtwvif->mac_id;
+	} else {
+		si->mac_id = rtw_acquire_macid(rtwdev);
+		if (si->mac_id >= RTW_MAX_MAC_ID_NUM)
+			return -ENOSPC;
+	}
 
-	if (vif->type == NL80211_IFTYPE_STATION && vif->cfg.assoc == 0)
-		rtwvif->mac_id = si->mac_id;
 	si->rtwdev = rtwdev;
 	si->sta = sta;
 	si->vif = vif;
@@ -365,11 +356,13 @@ void rtw_sta_remove(struct rtw_dev *rtwdev, struct ieee80211_sta *sta,
 		    bool fw_exist)
 {
 	struct rtw_sta_info *si = (struct rtw_sta_info *)sta->drv_priv;
+	struct ieee80211_vif *vif = si->vif;
 	int i;
 
 	cancel_work_sync(&si->rc_work);
 
-	rtw_release_macid(rtwdev, si->mac_id);
+	if (vif->type != NL80211_IFTYPE_STATION)
+		rtw_release_macid(rtwdev, si->mac_id);
 	if (fw_exist)
 		rtw_fw_media_status_report(rtwdev, si->mac_id, false);
 
@@ -609,6 +602,8 @@ static void rtw_reset_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
 	rtw_bf_disassoc(rtwdev, vif, NULL);
 	rtw_vif_assoc_changed(rtwvif, NULL);
 	rtw_txq_cleanup(rtwdev, vif->txq);
+
+	rtw_release_macid(rtwdev, rtwvif->mac_id);
 }
 
 void rtw_fw_recovery(struct rtw_dev *rtwdev)
@@ -2139,7 +2134,6 @@ int rtw_core_init(struct rtw_dev *rtwdev)
 	rtwdev->sec.total_cam_num = 32;
 	rtwdev->hal.current_channel = 1;
 	rtwdev->dm_info.fix_rate = U8_MAX;
-	set_bit(RTW_BC_MC_MACID, rtwdev->mac_id_map);
 
 	rtw_stats_init(rtwdev);
 

drivers/net/wireless/realtek/rtw88/main.h

@@ -772,7 +772,6 @@ struct rtw_txq {
 	unsigned long flags;
 };
 
-#define RTW_BC_MC_MACID 1
 DECLARE_EWMA(rssi, 10, 16);
 
 struct rtw_sta_info {
@@ -835,7 +834,7 @@ struct rtw_bf_info {
 struct rtw_vif {
 	enum rtw_net_type net_type;
 	u16 aid;
-	u8 mac_id; /* for STA mode only */
+	u8 mac_id;
 	u8 mac_addr[ETH_ALEN];
 	u8 bssid[ETH_ALEN];
 	u8 port;
@@ -2157,6 +2156,17 @@ static inline bool rtw_chip_has_tx_stbc(struct rtw_dev *rtwdev)
 	return rtwdev->chip->tx_stbc;
 }
 
+static inline u8 rtw_acquire_macid(struct rtw_dev *rtwdev)
+{
+	unsigned long mac_id;
+
+	mac_id = find_first_zero_bit(rtwdev->mac_id_map, RTW_MAX_MAC_ID_NUM);
+	if (mac_id < RTW_MAX_MAC_ID_NUM)
+		set_bit(mac_id, rtwdev->mac_id_map);
+
+	return mac_id;
+}
+
 static inline void rtw_release_macid(struct rtw_dev *rtwdev, u8 mac_id)
 {
 	clear_bit(mac_id, rtwdev->mac_id_map);

drivers/net/wireless/realtek/rtw88/tx.c

@@ -46,7 +46,8 @@ void rtw_tx_fill_tx_desc(struct rtw_tx_pkt_info *pkt_info, struct sk_buff *skb)
 		      le32_encode_bits(pkt_info->ls, RTW_TX_DESC_W0_LS) |
 		      le32_encode_bits(pkt_info->dis_qselseq, RTW_TX_DESC_W0_DISQSELSEQ);
 
-	tx_desc->w1 = le32_encode_bits(pkt_info->qsel, RTW_TX_DESC_W1_QSEL) |
+	tx_desc->w1 = le32_encode_bits(pkt_info->mac_id, RTW_TX_DESC_W1_MACID) |
+		      le32_encode_bits(pkt_info->qsel, RTW_TX_DESC_W1_QSEL) |
 		      le32_encode_bits(pkt_info->rate_id, RTW_TX_DESC_W1_RATE_ID) |
 		      le32_encode_bits(pkt_info->sec_type, RTW_TX_DESC_W1_SEC_TYPE) |
 		      le32_encode_bits(pkt_info->pkt_offset, RTW_TX_DESC_W1_PKT_OFFSET) |
@@ -415,14 +416,18 @@ void rtw_tx_pkt_info_update(struct rtw_dev *rtwdev,
 	const struct rtw_chip_info *chip = rtwdev->chip;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	struct ieee80211_vif *vif = info->control.vif;
 	struct rtw_sta_info *si;
-	struct ieee80211_vif *vif = NULL;
+	struct rtw_vif *rtwvif;
 	__le16 fc = hdr->frame_control;
 	bool bmc;
 
 	if (sta) {
 		si = (struct rtw_sta_info *)sta->drv_priv;
-		vif = si->vif;
+		pkt_info->mac_id = si->mac_id;
+	} else if (vif) {
+		rtwvif = (struct rtw_vif *)vif->drv_priv;
+		pkt_info->mac_id = rtwvif->mac_id;
 	}
 
 	if (ieee80211_is_mgmt(fc) || ieee80211_is_nullfunc(fc))

drivers/net/wireless/realtek/rtw88/tx.h

@@ -27,6 +27,7 @@ struct rtw_tx_desc {
 #define RTW_TX_DESC_W0_BMC BIT(24)
 #define RTW_TX_DESC_W0_LS BIT(26)
 #define RTW_TX_DESC_W0_DISQSELSEQ BIT(31)
+#define RTW_TX_DESC_W1_MACID GENMASK(7, 0)
 #define RTW_TX_DESC_W1_QSEL GENMASK(12, 8)
 #define RTW_TX_DESC_W1_RATE_ID GENMASK(20, 16)
 #define RTW_TX_DESC_W1_SEC_TYPE GENMASK(23, 22)