wifi: rtw89: separate BSSID CAM operations

Normally, we allocate a BSSID CAM to a vif. By hardware design, we must
allocate a BSSID CAM to each TDLS peer, so separate BSSID CAM operations
that will be used by later patches.

This patch doesn't change logic at all.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220610072610.27095-3-pkshih@realtek.com

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

@@ -445,15 +445,22 @@ void rtw89_cam_deinit_addr_cam(struct rtw89_dev *rtwdev,
 	clear_bit(addr_cam->addr_cam_idx, cam_info->addr_cam_map);
 }
 
-void rtw89_cam_deinit(struct rtw89_dev *rtwdev, struct rtw89_vif *rtwvif)
+void rtw89_cam_deinit_bssid_cam(struct rtw89_dev *rtwdev,
+				struct rtw89_bssid_cam_entry *bssid_cam)
 {
 	struct rtw89_cam_info *cam_info = &rtwdev->cam_info;
+
+	bssid_cam->valid = false;
+	clear_bit(bssid_cam->bssid_cam_idx, cam_info->bssid_cam_map);
+}
+
+void rtw89_cam_deinit(struct rtw89_dev *rtwdev, struct rtw89_vif *rtwvif)
+{
 	struct rtw89_addr_cam_entry *addr_cam = &rtwvif->addr_cam;
 	struct rtw89_bssid_cam_entry *bssid_cam = &rtwvif->bssid_cam;
 
 	rtw89_cam_deinit_addr_cam(rtwdev, addr_cam);
-	bssid_cam->valid = false;
-	clear_bit(bssid_cam->bssid_cam_idx, cam_info->bssid_cam_map);
+	rtw89_cam_deinit_bssid_cam(rtwdev, bssid_cam);
 }
 
 void rtw89_cam_reset_keys(struct rtw89_dev *rtwdev)
@@ -539,10 +546,11 @@ static int rtw89_cam_get_avail_bssid_cam(struct rtw89_dev *rtwdev,
 	return 0;
 }
 
-static int rtw89_cam_init_bssid_cam(struct rtw89_dev *rtwdev,
-				    struct rtw89_vif *rtwvif)
+int rtw89_cam_init_bssid_cam(struct rtw89_dev *rtwdev,
+			     struct rtw89_vif *rtwvif,
+			     struct rtw89_bssid_cam_entry *bssid_cam,
+			     const u8 *bssid)
 {
-	struct rtw89_bssid_cam_entry *bssid_cam = &rtwvif->bssid_cam;
 	u8 bssid_cam_idx;
 	int ret;
 
@@ -563,7 +571,7 @@ static int rtw89_cam_init_bssid_cam(struct rtw89_dev *rtwdev,
 	bssid_cam->len = BSSID_CAM_ENT_SIZE;
 	bssid_cam->offset = 0;
 	bssid_cam->valid = true;
-	ether_addr_copy(bssid_cam->bssid, rtwvif->bssid);
+	ether_addr_copy(bssid_cam->bssid, bssid);
 
 	return 0;
 }
@@ -581,7 +589,7 @@ int rtw89_cam_init(struct rtw89_dev *rtwdev, struct rtw89_vif *rtwvif)
 	struct rtw89_bssid_cam_entry *bssid_cam = &rtwvif->bssid_cam;
 	int ret;
 
-	ret = rtw89_cam_init_bssid_cam(rtwdev, rtwvif);
+	ret = rtw89_cam_init_bssid_cam(rtwdev, rtwvif, bssid_cam, rtwvif->bssid);
 	if (ret) {
 		rtw89_err(rtwdev, "failed to init bssid cam\n");
 		return ret;

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

@@ -359,6 +359,12 @@ int rtw89_cam_init_addr_cam(struct rtw89_dev *rtwdev,
 			    const struct rtw89_bssid_cam_entry *bssid_cam);
 void rtw89_cam_deinit_addr_cam(struct rtw89_dev *rtwdev,
 			       struct rtw89_addr_cam_entry *addr_cam);
+int rtw89_cam_init_bssid_cam(struct rtw89_dev *rtwdev,
+			     struct rtw89_vif *rtwvif,
+			     struct rtw89_bssid_cam_entry *bssid_cam,
+			     const u8 *bssid);
+void rtw89_cam_deinit_bssid_cam(struct rtw89_dev *rtwdev,
+				struct rtw89_bssid_cam_entry *bssid_cam);
 void rtw89_cam_fill_addr_cam_info(struct rtw89_dev *rtwdev,
 				  struct rtw89_vif *vif,
 				  struct rtw89_sta *rtwsta,