[brcmfmac] Support high power/low power/etc scan flags

This patch adds support for handling the scan flags that come from the
802.11 stack.  This enables the stack to control whether we are doing
high/low power scans, as well as other options.

Signed-off-by: Daniel Berlin <dberlin@dberlin.org>

Author: dberlin

drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c

@@ -1092,6 +1092,28 @@ static void brcmf_scan_params_v2_to_v1(struct brcmf_scan_params_v2_le *params_v2
 	       &params_v2_le->channel_list[0], params_size);
 }
 
+static u32 brcmf_nl80211_scan_flags_to_scan_flags(u32 nl80211_flags)
+{
+	u32 scan_flags = 0;
+	if (nl80211_flags & NL80211_SCAN_FLAG_LOW_SPAN) {
+		scan_flags |= BRCMF_SCANFLAGS_LOW_SPAN;
+		brcmf_dbg(SCAN, "requested low span scan\n");
+	}
+	if (nl80211_flags & NL80211_SCAN_FLAG_HIGH_ACCURACY) {
+		scan_flags |= BRCMF_SCANFLAGS_HIGH_ACCURACY;
+		brcmf_dbg(SCAN, "requested high accuracy scan\n");
+	}
+	if (nl80211_flags & NL80211_SCAN_FLAG_LOW_POWER) {
+		scan_flags |= BRCMF_SCANFLAGS_LOW_POWER;
+		brcmf_dbg(SCAN, "requested low power scan\n");
+	}
+	if (nl80211_flags & NL80211_SCAN_FLAG_LOW_PRIORITY) {
+		scan_flags |= BRCMF_SCANFLAGS_LOW_PRIO;
+		brcmf_dbg(SCAN, "requested low priority scan\n");
+	}
+	return scan_flags;
+}
+
 static void brcmf_escan_prep(struct brcmf_cfg80211_info *cfg,
 			     struct brcmf_if *ifp,
 			     struct brcmf_scan_params_v2_le *params_le,
@@ -1105,6 +1127,7 @@ static void brcmf_escan_prep(struct brcmf_cfg80211_info *cfg,
 	char *ptr;
 	int length;
 	struct brcmf_ssid_le ssid_le;
+	u32 scan_type = BRCMF_SCANTYPE_ACTIVE;
 
 	eth_broadcast_addr(params_le->bssid);
 
@@ -1117,7 +1140,6 @@ static void brcmf_escan_prep(struct brcmf_cfg80211_info *cfg,
 
 	params_le->bss_type = DOT11_BSSTYPE_ANY;
 	params_le->ssid_type = 0;
-	params_le->scan_type = cpu_to_le32(BRCMF_SCANTYPE_ACTIVE);
 	params_le->channel_num = 0;
 	params_le->nprobes = cpu_to_le32(-1);
 	params_le->active_time = cpu_to_le32(-1);
@@ -1177,9 +1199,17 @@ static void brcmf_escan_prep(struct brcmf_cfg80211_info *cfg,
 		}
 	} else {
 		brcmf_dbg(SCAN, "Performing passive scan\n");
-		params_le->scan_type = cpu_to_le32(BRCMF_SCANTYPE_PASSIVE);
+		scan_type = BRCMF_SCANTYPE_PASSIVE;
 	}
+	scan_type |= brcmf_nl80211_scan_flags_to_scan_flags(request->flags);
+	params_le->scan_type = cpu_to_le32(scan_type);
 	params_le->length = cpu_to_le16(length);
+
+	/* Include RNR results if requested */
+	if (request->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ) {
+		params_le->ssid_type |= BRCMF_SCANSSID_INC_RNR;
+	}
+
 	/* Adding mask to channel numbers */
 	params_le->channel_num =
 		cpu_to_le32((n_ssids << BRCMF_SCAN_PARAMS_NSSID_SHIFT) |
@@ -7865,6 +7895,13 @@ static int brcmf_setup_wiphy(struct wiphy *wiphy, struct brcmf_if *ifp)
 	}
 	if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_SAE_EXT))
 		wiphy->features |= NL80211_FEATURE_SAE;
+
+	/* High accuracy and low power scans are always supported. */
+	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_HIGH_ACCURACY_SCAN);
+	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_LOW_POWER_SCAN);
+	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_LOW_SPAN_SCAN);
+	wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN;
+
 	wiphy->mgmt_stypes = brcmf_txrx_stypes;
 	wiphy->max_remain_on_channel_duration = 5000;
 	if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_PNO)) {

drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h

@@ -64,6 +64,15 @@
 #define BRCMF_SCANTYPE_ACTIVE		0
 #define BRCMF_SCANTYPE_PASSIVE		1
 
+/* Additional scanning flags */
+#define BRCMF_SCANFLAGS_LOW_PRIO 	0x2
+#define BRCMF_SCANFLAGS_LOW_POWER	0x1000
+#define BRCMF_SCANFLAGS_HIGH_ACCURACY	0x2000
+#define BRCMF_SCANFLAGS_LOW_SPAN	0x4000
+
+/* scan ssid_type flags */
+#define BRCMF_SCANSSID_INC_RNR		0x02 /* Include RNR channels*/
+
 #define BRCMF_WSEC_MAX_PSK_LEN		32
 #define	BRCMF_WSEC_PASSPHRASE		BIT(0)