wil6210: support FW RSSI reporting

New FW supports reporting RSSI signal in dBm.
Report RSSI to kernel in case FW has this capability.
Signed-off-by: Dedy Lansky <qca_dlansky@qca.qualcomm.com>
Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/wil6210/cfg80211.c

@@ -273,12 +273,12 @@ int wil_cid_fill_sinfo(struct wil6210_priv *wil, int cid,
 
 	wil_dbg_wmi(wil, "Link status for CID %d: {\n"
 		    "  MCS %d TSF 0x%016llx\n"
-		    "  BF status 0x%08x SNR 0x%08x SQI %d%%\n"
+		    "  BF status 0x%08x RSSI %d SQI %d%%\n"
 		    "  Tx Tpt %d goodput %d Rx goodput %d\n"
 		    "  Sectors(rx:tx) my %d:%d peer %d:%d\n""}\n",
 		    cid, le16_to_cpu(reply.evt.bf_mcs),
 		    le64_to_cpu(reply.evt.tsf), reply.evt.status,
-		    le32_to_cpu(reply.evt.snr_val),
+		    reply.evt.rssi,
 		    reply.evt.sqi,
 		    le32_to_cpu(reply.evt.tx_tpt),
 		    le32_to_cpu(reply.evt.tx_goodput),
@@ -311,7 +311,11 @@ int wil_cid_fill_sinfo(struct wil6210_priv *wil, int cid,
 
 	if (test_bit(wil_status_fwconnected, wil->status)) {
 		sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL);
-		sinfo->signal = reply.evt.sqi;
+		if (test_bit(WMI_FW_CAPABILITY_RSSI_REPORTING,
+			     wil->fw_capabilities))
+			sinfo->signal = reply.evt.rssi;
+		else
+			sinfo->signal = reply.evt.sqi;
 	}
 
 	return rc;
@@ -1794,7 +1798,7 @@ static void wil_wiphy_init(struct wiphy *wiphy)
 
 	wiphy->bands[NL80211_BAND_60GHZ] = &wil_band_60ghz;
 
-	/* TODO: figure this out */
+	/* may change after reading FW capabilities */
 	wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 
 	wiphy->cipher_suites = wil_cipher_suites;

drivers/net/wireless/ath/wil6210/debugfs.c

@@ -1016,6 +1016,7 @@ static int wil_bf_debugfs_show(struct seq_file *s, void *data)
 			   "  TSF = 0x%016llx\n"
 			   "  TxMCS = %2d TxTpt = %4d\n"
 			   "  SQI = %4d\n"
+			   "  RSSI = %4d\n"
 			   "  Status = 0x%08x %s\n"
 			   "  Sectors(rx:tx) my %2d:%2d peer %2d:%2d\n"
 			   "  Goodput(rx:tx) %4d:%4d\n"
@@ -1025,6 +1026,7 @@ static int wil_bf_debugfs_show(struct seq_file *s, void *data)
 			   le16_to_cpu(reply.evt.bf_mcs),
 			   le32_to_cpu(reply.evt.tx_tpt),
 			   reply.evt.sqi,
+			   reply.evt.rssi,
 			   status, wil_bfstatus_str(status),
 			   le16_to_cpu(reply.evt.my_rx_sector),
 			   le16_to_cpu(reply.evt.my_tx_sector),

drivers/net/wireless/ath/wil6210/pcie_bus.c

@@ -84,6 +84,9 @@ void wil_set_capabilities(struct wil6210_priv *wil)
 
 	/* extract FW capabilities from file without loading the FW */
 	wil_request_firmware(wil, wil->wil_fw_name, false);
+
+	if (test_bit(WMI_FW_CAPABILITY_RSSI_REPORTING, wil->fw_capabilities))
+		wil_to_wiphy(wil)->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 }
 
 void wil_disable_irq(struct wil6210_priv *wil)

drivers/net/wireless/ath/wil6210/wmi.c

@@ -381,12 +381,15 @@ static void wmi_evt_rx_mgmt(struct wil6210_priv *wil, int id, void *d, int len)
 	ch_no = data->info.channel + 1;
 	freq = ieee80211_channel_to_frequency(ch_no, NL80211_BAND_60GHZ);
 	channel = ieee80211_get_channel(wiphy, freq);
-	signal = data->info.sqi;
+	if (test_bit(WMI_FW_CAPABILITY_RSSI_REPORTING, wil->fw_capabilities))
+		signal = 100 * data->info.rssi;
+	else
+		signal = data->info.sqi;
 	d_status = le16_to_cpu(data->info.status);
 	fc = rx_mgmt_frame->frame_control;
 
-	wil_dbg_wmi(wil, "MGMT Rx: channel %d MCS %d SNR %d SQI %d%%\n",
-		    data->info.channel, data->info.mcs, data->info.snr,
+	wil_dbg_wmi(wil, "MGMT Rx: channel %d MCS %d RSSI %d SQI %d%%\n",
+		    data->info.channel, data->info.mcs, data->info.rssi,
 		    data->info.sqi);
 	wil_dbg_wmi(wil, "status 0x%04x len %d fc 0x%04x\n", d_status, d_len,
 		    le16_to_cpu(fc));

drivers/net/wireless/ath/wil6210/wmi.h

@@ -60,6 +60,7 @@ enum wmi_fw_capability {
 	WMI_FW_CAPABILITY_WMI_ONLY		= 5,
 	WMI_FW_CAPABILITY_THERMAL_THROTTLING	= 7,
 	WMI_FW_CAPABILITY_D3_SUSPEND		= 8,
+	WMI_FW_CAPABILITY_RSSI_REPORTING	= 12,
 	WMI_FW_CAPABILITY_MAX,
 };
 
@@ -1306,7 +1307,8 @@ struct wmi_notify_req_done_event {
 	/* beamforming status, 0: fail; 1: OK; 2: retrying */
 	__le32 status;
 	__le64 tsf;
-	__le32 snr_val;
+	s8 rssi;
+	u8 reserved0[3];
 	__le32 tx_tpt;
 	__le32 tx_goodput;
 	__le32 rx_goodput;
@@ -1602,7 +1604,7 @@ struct wmi_get_ssid_event {
 /* wmi_rx_mgmt_info */
 struct wmi_rx_mgmt_info {
 	u8 mcs;
-	s8 snr;
+	s8 rssi;
 	u8 range;
 	u8 sqi;
 	__le16 stype;