rtw89: 8852c: add trigger frame counter

Adding this allows us to maintain trigger frame statistics, which is
required for our CFO tracking decisions.
Signed-off-by: Po Hao Huang <phhuang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220608113224.11193-3-pkshih@realtek.com

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

@@ -1343,6 +1343,47 @@ struct rtw89_vif_rx_stats_iter_data {
 	const u8 *bssid;
 };
 
+static void rtw89_stats_trigger_frame(struct rtw89_dev *rtwdev,
+				      struct ieee80211_vif *vif,
+				      struct sk_buff *skb)
+{
+	struct rtw89_vif *rtwvif = (struct rtw89_vif *)vif->drv_priv;
+	struct ieee80211_trigger *tf = (struct ieee80211_trigger *)skb->data;
+	u8 *pos, *end, type;
+	u16 aid;
+
+	if (!ether_addr_equal(vif->bss_conf.bssid, tf->ta) ||
+	    rtwvif->wifi_role != RTW89_WIFI_ROLE_STATION ||
+	    rtwvif->net_type == RTW89_NET_TYPE_NO_LINK)
+		return;
+
+	type = le64_get_bits(tf->common_info, IEEE80211_TRIGGER_TYPE_MASK);
+	if (type != IEEE80211_TRIGGER_TYPE_BASIC)
+		return;
+
+	end = (u8 *)tf + skb->len;
+	pos = tf->variable;
+
+	while (end - pos >= RTW89_TF_BASIC_USER_INFO_SZ) {
+		aid = RTW89_GET_TF_USER_INFO_AID12(pos);
+		rtw89_debug(rtwdev, RTW89_DBG_TXRX,
+			    "[TF] aid: %d, ul_mcs: %d, rua: %d\n",
+			    aid, RTW89_GET_TF_USER_INFO_UL_MCS(pos),
+			    RTW89_GET_TF_USER_INFO_RUA(pos));
+
+		if (aid == RTW89_TF_PAD)
+			break;
+
+		if (aid == vif->bss_conf.aid) {
+			rtwvif->stats.rx_tf_acc++;
+			rtwdev->stats.rx_tf_acc++;
+			break;
+		}
+
+		pos += RTW89_TF_BASIC_USER_INFO_SZ;
+	}
+}
+
 static void rtw89_vif_rx_stats_iter(void *data, u8 *mac,
 				    struct ieee80211_vif *vif)
 {
@@ -1355,6 +1396,11 @@ static void rtw89_vif_rx_stats_iter(void *data, u8 *mac,
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 	const u8 *bssid = iter_data->bssid;
 
+	if (ieee80211_is_trigger(hdr->frame_control)) {
+		rtw89_stats_trigger_frame(rtwdev, vif, skb);
+		return;
+	}
+
 	if (!ether_addr_equal(vif->bss_conf.bssid, bssid))
 		return;
 
@@ -2023,6 +2069,8 @@ static bool rtw89_traffic_stats_calc(struct rtw89_dev *rtwdev,
 	stats->rx_unicast = 0;
 	stats->tx_cnt = 0;
 	stats->rx_cnt = 0;
+	stats->rx_tf_periodic = stats->rx_tf_acc;
+	stats->rx_tf_acc = 0;
 
 	if (tx_tfc_lv != stats->tx_tfc_lv || rx_tfc_lv != stats->rx_tfc_lv)
 		return true;

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

@@ -55,6 +55,16 @@ enum htc_om_channel_width {
 #define RTW89_HTC_MASK_HTC_OM_DL_MU_MIMO_RR BIT(16)
 #define RTW89_HTC_MASK_HTC_OM_UL_MU_DATA_DIS BIT(17)
 
+#define RTW89_TF_PAD GENMASK(11, 0)
+#define RTW89_TF_BASIC_USER_INFO_SZ 6
+
+#define RTW89_GET_TF_USER_INFO_AID12(data)	\
+	le32_get_bits(*((const __le32 *)(data)), GENMASK(11, 0))
+#define RTW89_GET_TF_USER_INFO_RUA(data)	\
+	le32_get_bits(*((const __le32 *)(data)), GENMASK(19, 12))
+#define RTW89_GET_TF_USER_INFO_UL_MCS(data)	\
+	le32_get_bits(*((const __le32 *)(data)), GENMASK(24, 21))
+
 enum rtw89_subband {
 	RTW89_CH_2G = 0,
 	RTW89_CH_5G_BAND_1 = 1,
@@ -943,6 +953,10 @@ struct rtw89_traffic_stats {
 	u32 rx_throughput;
 	u32 tx_throughput_raw;
 	u32 rx_throughput_raw;
+
+	u32 rx_tf_acc;
+	u32 rx_tf_periodic;
+
 	enum rtw89_tfc_lv tx_tfc_lv;
 	enum rtw89_tfc_lv rx_tfc_lv;
 	struct ewma_tp tx_ewma_tp;

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

@@ -2376,7 +2376,8 @@ static int rtw89_debug_priv_phy_info_get(struct seq_file *m, void *v)
 	seq_printf(m, "TP TX: %u [%u] Mbps (lv: %d), RX: %u [%u] Mbps (lv: %d)\n",
 		   stats->tx_throughput, stats->tx_throughput_raw, stats->tx_tfc_lv,
 		   stats->rx_throughput, stats->rx_throughput_raw, stats->rx_tfc_lv);
-	seq_printf(m, "Beacon: %u\n", pkt_stat->beacon_nr);
+	seq_printf(m, "Beacon: %u, TF: %u\n", pkt_stat->beacon_nr,
+		   stats->rx_tf_periodic);
 	seq_printf(m, "Avg packet length: TX=%u, RX=%u\n", stats->tx_avg_len,
 		   stats->rx_avg_len);