wifi: rtw89: support MULTI_BSSID and correct BSSID mask of H2C

The BSSID mask of H2C is used to match BSSID of receiving packets.
Normally, we set six bits BSSID mask to exactly match BSSID of packets
sent by target AP. After we support multiple BSSID, it could connect a
nontransmitted BSSID, so we can only match first five bytes of BSSID.
That means we could possibly receive other AP's packets if only the last
byte of BSSID is different from target AP.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220530112743.106857-1-pkshih@realtek.com

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

@@ -602,11 +602,18 @@ int rtw89_cam_fill_bssid_cam_info(struct rtw89_dev *rtwdev,
 	struct ieee80211_vif *vif = rtwvif_to_vif(rtwvif);
 	struct rtw89_bssid_cam_entry *bssid_cam = &rtwvif->bssid_cam;
 	u8 bss_color = vif->bss_conf.he_bss_color.color;
+	u8 bss_mask;
+
+	if (vif->bss_conf.nontransmitted)
+		bss_mask = RTW89_BSSID_MATCH_5_BYTES;
+	else
+		bss_mask = RTW89_BSSID_MATCH_ALL;
 
 	FWCMD_SET_ADDR_BSSID_IDX(cmd, bssid_cam->bssid_cam_idx);
 	FWCMD_SET_ADDR_BSSID_OFFSET(cmd, bssid_cam->offset);
 	FWCMD_SET_ADDR_BSSID_LEN(cmd, bssid_cam->len);
 	FWCMD_SET_ADDR_BSSID_VALID(cmd, bssid_cam->valid);
+	FWCMD_SET_ADDR_BSSID_MASK(cmd, bss_mask);
 	FWCMD_SET_ADDR_BSSID_BB_SEL(cmd, bssid_cam->phy_idx);
 	FWCMD_SET_ADDR_BSSID_BSS_COLOR(cmd, bss_color);
 

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

@@ -9,6 +9,9 @@
 
 #define RTW89_SEC_CAM_LEN	20
 
+#define RTW89_BSSID_MATCH_ALL GENMASK(5, 0)
+#define RTW89_BSSID_MATCH_5_BYTES GENMASK(4, 0)
+
 static inline void FWCMD_SET_ADDR_IDX(void *cmd, u32 value)
 {
 	le32p_replace_bits((__le32 *)(cmd) + 1, value, GENMASK(7, 0));
@@ -309,6 +312,11 @@ static inline void FWCMD_SET_ADDR_BSSID_BB_SEL(void *cmd, u32 value)
 	le32p_replace_bits((__le32 *)(cmd) + 13, value, BIT(1));
 }
 
+static inline void FWCMD_SET_ADDR_BSSID_MASK(void *cmd, u32 value)
+{
+	le32p_replace_bits((__le32 *)(cmd) + 13, value, GENMASK(7, 2));
+}
+
 static inline void FWCMD_SET_ADDR_BSSID_BSS_COLOR(void *cmd, u32 value)
 {
 	le32p_replace_bits((__le32 *)(cmd) + 13, value, GENMASK(13, 8));

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

@@ -3011,6 +3011,7 @@ static int rtw89_core_register_hw(struct rtw89_dev *rtwdev)
 	ieee80211_hw_set(hw, SUPPORTS_PS);
 	ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 	ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
+	ieee80211_hw_set(hw, SUPPORTS_MULTI_BSSID);
 
 	hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 				     BIT(NL80211_IFTYPE_AP);