wifi: rtw89: add BW info for both TX and RX in phy_info

In order to debug performance issue intuitively, add bandwidth information
into debugfs entry phy_info. After applying this patch, it looks like:

 TX rate [0]: HE 2SS MCS-11 GI:0.8 BW:80 (hw_rate=0x19b) ==> agg_wait=1 (3500)
 RX rate [0]: HE 2SS MCS-9 GI:0.8 BW:80  (hw_rate=0x199)
Signed-off-by: Eric Huang <echuang@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/20221021091601.39884-1-pkshih@realtek.com

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

@@ -51,6 +51,22 @@ struct rtw89_debugfs_priv {
 	};
 };
 
+static const u16 rtw89_rate_info_bw_to_mhz_map[] = {
+	[RATE_INFO_BW_20] = 20,
+	[RATE_INFO_BW_40] = 40,
+	[RATE_INFO_BW_80] = 80,
+	[RATE_INFO_BW_160] = 160,
+	[RATE_INFO_BW_320] = 320,
+};
+
+static u16 rtw89_rate_info_bw_to_mhz(enum rate_info_bw bw)
+{
+	if (bw < ARRAY_SIZE(rtw89_rate_info_bw_to_mhz_map))
+		return rtw89_rate_info_bw_to_mhz_map[bw];
+
+	return 0;
+}
+
 static int rtw89_debugfs_single_show(struct seq_file *m, void *v)
 {
 	struct rtw89_debugfs_priv *debugfs_priv = m->private;
@@ -2379,6 +2395,7 @@ static void rtw89_sta_info_get_iter(void *data, struct ieee80211_sta *sta)
 	else
 		seq_printf(m, "Legacy %d", rate->legacy);
 	seq_printf(m, "%s", rtwsta->ra_report.might_fallback_legacy ? " FB_G" : "");
+	seq_printf(m, " BW:%u", rtw89_rate_info_bw_to_mhz(rate->bw));
 	seq_printf(m, "\t(hw_rate=0x%x)", rtwsta->ra_report.hw_rate);
 	seq_printf(m, "\t==> agg_wait=%d (%d)\n", rtwsta->max_agg_wait,
 		   sta->deflink.agg.max_rc_amsdu_len);
@@ -2404,6 +2421,7 @@ static void rtw89_sta_info_get_iter(void *data, struct ieee80211_sta *sta)
 			   he_gi_str[rate->he_gi] : "N/A");
 		break;
 	}
+	seq_printf(m, " BW:%u", rtw89_rate_info_bw_to_mhz(status->bw));
 	seq_printf(m, "\t(hw_rate=0x%x)\n", rtwsta->rx_hw_rate);
 
 	rssi = ewma_rssi_read(&rtwsta->avg_rssi);