mt76: mt7921: introduce schedule scan support

introduce schedule scan to control mt7921 firmware to do background scan in
defined plan to see if the matched SSID is available.

Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Co-developed-by: Soul Huang <Soul.Huang@mediatek.com>
Signed-off-by: Soul Huang <Soul.Huang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 83 insertions, 0 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
index ee4b52558974..6f2b4086ca81 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
@@ -2361,6 +2361,89 @@ int mt7921_mcu_cancel_hw_scan(struct mt7921_phy *phy,
 				 sizeof(req), false);
 }
 
+int mt7921_mcu_sched_scan_req(struct mt7921_phy *phy,
+			      struct ieee80211_vif *vif,
+			      struct cfg80211_sched_scan_request *sreq)
+{
+	struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
+	struct ieee80211_channel **scan_list = sreq->channels;
+	struct mt7921_dev *dev = phy->dev;
+	struct mt7921_mcu_scan_channel *chan;
+	struct mt7921_sched_scan_req *req;
+	struct cfg80211_match_set *match;
+	struct cfg80211_ssid *ssid;
+	struct sk_buff *skb;
+	int i;
+
+	skb = mt76_mcu_msg_alloc(&dev->mt76, NULL,
+				 sizeof(*req) + sreq->ie_len);
+	if (!skb)
+		return -ENOMEM;
+
+	mvif->mt76.scan_seq_num = (mvif->mt76.scan_seq_num + 1) & 0x7f;
+
+	req = (struct mt7921_sched_scan_req *)skb_put(skb, sizeof(*req));
+	req->version = 1;
+	req->seq_num = mvif->mt76.scan_seq_num;
+
+	req->ssids_num = sreq->n_ssids;
+	for (i = 0; i < req->ssids_num; i++) {
+		ssid = &sreq->ssids[i];
+		memcpy(req->ssids[i].ssid, ssid->ssid, ssid->ssid_len);
+		req->ssids[i].ssid_len = cpu_to_le32(ssid->ssid_len);
+	}
+
+	req->match_num = sreq->n_match_sets;
+	for (i = 0; i < req->match_num; i++) {
+		match = &sreq->match_sets[i];
+		memcpy(req->match[i].ssid, match->ssid.ssid,
+		       match->ssid.ssid_len);
+		req->match[i].rssi_th = cpu_to_le32(match->rssi_thold);
+		req->match[i].ssid_len = match->ssid.ssid_len;
+	}
+
+	req->channel_type = sreq->n_channels ? 4 : 0;
+	req->channels_num = min_t(u8, sreq->n_channels, 64);
+	for (i = 0; i < req->channels_num; i++) {
+		chan = &req->channels[i];
+		chan->band = scan_list[i]->band == NL80211_BAND_2GHZ ? 1 : 2;
+		chan->channel_num = scan_list[i]->hw_value;
+	}
+
+	req->intervals_num = sreq->n_scan_plans;
+	for (i = 0; i < req->intervals_num; i++)
+		req->intervals[i] = cpu_to_le16(sreq->scan_plans[i].interval);
+
+	if (sreq->ie_len > 0) {
+		req->ie_len = cpu_to_le16(sreq->ie_len);
+		memcpy(skb_put(skb, sreq->ie_len), sreq->ie, sreq->ie_len);
+	}
+
+	return mt76_mcu_skb_send_msg(&dev->mt76, skb, MCU_CMD_SCHED_SCAN_REQ,
+				     false);
+}
+
+int mt7921_mcu_sched_scan_enable(struct mt7921_phy *phy,
+				 struct ieee80211_vif *vif,
+				 bool enable)
+{
+	struct mt7921_dev *dev = phy->dev;
+	struct {
+		u8 active; /* 0: enabled 1: disabled */
+		u8 rsv[3];
+	} __packed req = {
+		.active = !enable,
+	};
+
+	if (enable)
+		set_bit(MT76_HW_SCHED_SCANNING, &phy->mt76->state);
+	else
+		clear_bit(MT76_HW_SCHED_SCANNING, &phy->mt76->state);
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_CMD_SCHED_SCAN_ENABLE, &req,
+				 sizeof(req), false);
+}
+
 u32 mt7921_get_wtbl_info(struct mt7921_dev *dev, u16 wlan_idx)
 {
 	struct mt7921_mcu_wlan_info wtbl_info = {