wifi: rtw89: tweak driver architecture for impending MLO support

The drv_priv hooked to mac80211 become as below.

                           (drv_priv)             (instance-0)
 +---------------+       +-----------+          +----------------+
 | ieee80211_vif | <---> | rtw89_vif | -------> | rtw89_vif_link |
 +---------------+       +-----------+    |     +----------------+
                                          |
                                          |       (instance-1)
                                          |     +----------------+
                                          +---> | rtw89_vif_link |
                                                +----------------+

                           (drv_priv)             (instance-0)
 +---------------+       +-----------+          +----------------+
 | ieee80211_sta | <---> | rtw89_sta | -------> | rtw89_sta_link |
 +---------------+       +-----------+    |     +----------------+
                                          |
                                          |       (instance-1)
                                          |     +----------------+
                                          +---> | rtw89_sta_link |
                                                +----------------+

The relation bewteen mac80211 link_id and our link instance is like below.

                 |\
 (link_id)       | \
     0  -------- |  |
     1  -------- |  | ------ instance-0 (link_id: X) -> work on HW band 0
     2  -------- |  |
     ...         |  | ------ instance-1 (link_id: Y) -> work on HW band 1
     14 -------- |  |
                 | /
                 |/

	N.B. For cases of non-MLD connection, we set our link instance-0
	active with link_id 0. So, our code flow can be compatible between
	non-MLD connection and MLD connection.

Based on above, we tweak entire driver architecture first. But, we don't
dynamically enable multiple links here. That will be handled separately.
Most of the things changed here are changing flows to iterate all active
links and read bss_conf/link_sta data according to target link. And, for
cases of scan, ROC, WOW, we use instance-0 to deal with the request.

There are some things listed below, which work for now but need to extend
before multiple active links.
	1. tx path
		select suitable link instance among multiple active links
	2. rx path
		determine rx link by PPDU instead of always link instance-0
	3. CAM
		apply MLD pairwise key to any active links dynamically

Besides, PS code cannot easily work along with tweaking architecture. With
supporting MLO flag (currently false), we disable PS first and will fix it
by another commit in the following.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20240916053158.47350-8-pkshih@realtek.com

1 files changed, 40 insertions, 23 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/ser.c b/drivers/net/wireless/realtek/rtw89/ser.c
index 50b66eaf9bd0..7b203bb7f151 100644
--- a/drivers/net/wireless/realtek/rtw89/ser.c
+++ b/drivers/net/wireless/realtek/rtw89/ser.c
@@ -298,54 +298,71 @@ static void drv_resume_rx(struct rtw89_ser *ser)
 	clear_bit(RTW89_SER_DRV_STOP_RX, ser->flags);
 }
 
-static void ser_reset_vif(struct rtw89_dev *rtwdev, struct rtw89_vif_link *rtwvif_link)
+static void ser_reset_vif(struct rtw89_dev *rtwdev, struct rtw89_vif *rtwvif)
 {
-	rtw89_core_release_bit_map(rtwdev->hw_port, rtwvif_link->port);
-	rtwvif_link->net_type = RTW89_NET_TYPE_NO_LINK;
-	rtwvif_link->trigger = false;
-	rtwvif_link->tdls_peer = 0;
+	struct rtw89_vif_link *rtwvif_link;
+	unsigned int link_id;
+
+	rtwvif->tdls_peer = 0;
+
+	rtw89_vif_for_each_link(rtwvif, rtwvif_link, link_id) {
+		rtw89_core_release_bit_map(rtwdev->hw_port, rtwvif_link->port);
+		rtwvif_link->net_type = RTW89_NET_TYPE_NO_LINK;
+		rtwvif_link->trigger = false;
+	}
 }
 
 static void ser_sta_deinit_cam_iter(void *data, struct ieee80211_sta *sta)
 {
-	struct rtw89_vif_link *target_rtwvif = (struct rtw89_vif_link *)data;
-	struct rtw89_sta_link *rtwsta_link = (struct rtw89_sta_link *)sta->drv_priv;
-	struct rtw89_vif_link *rtwvif_link = rtwsta_link->rtwvif_link;
-	struct rtw89_dev *rtwdev = rtwvif_link->rtwdev;
+	struct rtw89_vif *target_rtwvif = (struct rtw89_vif *)data;
+	struct rtw89_sta *rtwsta = sta_to_rtwsta(sta);
+	struct rtw89_vif *rtwvif = rtwsta->rtwvif;
+	struct rtw89_dev *rtwdev = rtwvif->rtwdev;
+	struct rtw89_vif_link *rtwvif_link;
+	struct rtw89_sta_link *rtwsta_link;
+	unsigned int link_id;
 
-	if (rtwvif_link != target_rtwvif)
+	if (rtwvif != target_rtwvif)
 		return;
 
-	if (rtwvif_link->net_type == RTW89_NET_TYPE_AP_MODE || sta->tdls)
-		rtw89_cam_deinit_addr_cam(rtwdev, &rtwsta_link->addr_cam);
-	if (sta->tdls)
-		rtw89_cam_deinit_bssid_cam(rtwdev, &rtwsta_link->bssid_cam);
+	rtw89_sta_for_each_link(rtwsta, rtwsta_link, link_id) {
+		rtwvif_link = rtwsta_link->rtwvif_link;
 
-	INIT_LIST_HEAD(&rtwsta_link->ba_cam_list);
+		if (rtwvif_link->net_type == RTW89_NET_TYPE_AP_MODE || sta->tdls)
+			rtw89_cam_deinit_addr_cam(rtwdev, &rtwsta_link->addr_cam);
+		if (sta->tdls)
+			rtw89_cam_deinit_bssid_cam(rtwdev, &rtwsta_link->bssid_cam);
+
+		INIT_LIST_HEAD(&rtwsta_link->ba_cam_list);
+	}
 }
 
-static void ser_deinit_cam(struct rtw89_dev *rtwdev, struct rtw89_vif_link *rtwvif_link)
+static void ser_deinit_cam(struct rtw89_dev *rtwdev, struct rtw89_vif *rtwvif)
 {
+	struct rtw89_vif_link *rtwvif_link;
+	unsigned int link_id;
+
 	ieee80211_iterate_stations_atomic(rtwdev->hw,
 					  ser_sta_deinit_cam_iter,
-					  rtwvif_link);
+					  rtwvif);
 
-	rtw89_cam_deinit(rtwdev, rtwvif_link);
+	rtw89_vif_for_each_link(rtwvif, rtwvif_link, link_id)
+		rtw89_cam_deinit(rtwdev, rtwvif_link);
 
 	bitmap_zero(rtwdev->cam_info.ba_cam_map, RTW89_MAX_BA_CAM_NUM);
 }
 
 static void ser_reset_mac_binding(struct rtw89_dev *rtwdev)
 {
-	struct rtw89_vif_link *rtwvif_link;
+	struct rtw89_vif *rtwvif;
 
 	rtw89_cam_reset_keys(rtwdev);
-	rtw89_for_each_rtwvif(rtwdev, rtwvif_link)
-		ser_deinit_cam(rtwdev, rtwvif_link);
+	rtw89_for_each_rtwvif(rtwdev, rtwvif)
+		ser_deinit_cam(rtwdev, rtwvif);
 
 	rtw89_core_release_all_bits_map(rtwdev->mac_id_map, RTW89_MAX_MAC_ID_NUM);
-	rtw89_for_each_rtwvif(rtwdev, rtwvif_link)
-		ser_reset_vif(rtwdev, rtwvif_link);
+	rtw89_for_each_rtwvif(rtwdev, rtwvif)
+		ser_reset_vif(rtwdev, rtwvif);
 
 	rtwdev->total_sta_assoc = 0;
 }