mt76: mt7921: introduce support for hardware beacon filter

Introduce support for hw beacon filter available in the mt7921 firmware.

According to mt7921e firmware, enabling hardware filter would rely on
mt7921_mcu_uni_bss_bcnft and disabling hardware filter still rely on legacy
mt7921_mcu_set_bss_pm.
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>

drivers/net/wireless/mediatek/mt76/mt7921/mcu.c

@@ -2500,3 +2500,78 @@ int mt7921_mcu_uni_bss_ps(struct mt7921_dev *dev, struct ieee80211_vif *vif)
 	return mt76_mcu_send_msg(&dev->mt76, MCU_UNI_CMD_BSS_INFO_UPDATE,
 				 &ps_req, sizeof(ps_req), true);
 }
+
+int mt7921_mcu_uni_bss_bcnft(struct mt7921_dev *dev, struct ieee80211_vif *vif,
+			     bool enable)
+{
+	struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
+	struct {
+		struct {
+			u8 bss_idx;
+			u8 pad[3];
+		} __packed hdr;
+		struct bcnft_tlv {
+			__le16 tag;
+			__le16 len;
+			__le16 bcn_interval;
+			u8 dtim_period;
+			u8 pad;
+		} __packed bcnft;
+	} __packed bcnft_req = {
+		.hdr = {
+			.bss_idx = mvif->mt76.idx,
+		},
+		.bcnft = {
+			.tag = cpu_to_le16(UNI_BSS_INFO_BCNFT),
+			.len = cpu_to_le16(sizeof(struct bcnft_tlv)),
+			.bcn_interval = cpu_to_le16(vif->bss_conf.beacon_int),
+			.dtim_period = vif->bss_conf.dtim_period,
+		},
+	};
+
+	if (vif->type != NL80211_IFTYPE_STATION)
+		return 0;
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_UNI_CMD_BSS_INFO_UPDATE,
+				 &bcnft_req, sizeof(bcnft_req), true);
+}
+
+int mt7921_mcu_set_bss_pm(struct mt7921_dev *dev, struct ieee80211_vif *vif,
+			  bool enable)
+{
+	struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
+	struct {
+		u8 bss_idx;
+		u8 dtim_period;
+		__le16 aid;
+		__le16 bcn_interval;
+		__le16 atim_window;
+		u8 uapsd;
+		u8 bmc_delivered_ac;
+		u8 bmc_triggered_ac;
+		u8 pad;
+	} req = {
+		.bss_idx = mvif->mt76.idx,
+		.aid = cpu_to_le16(vif->bss_conf.aid),
+		.dtim_period = vif->bss_conf.dtim_period,
+		.bcn_interval = cpu_to_le16(vif->bss_conf.beacon_int),
+	};
+	struct {
+		u8 bss_idx;
+		u8 pad[3];
+	} req_hdr = {
+		.bss_idx = mvif->mt76.idx,
+	};
+	int err;
+
+	if (vif->type != NL80211_IFTYPE_STATION)
+		return 0;
+
+	err = mt76_mcu_send_msg(&dev->mt76, MCU_CMD_SET_BSS_ABORT, &req_hdr,
+				sizeof(req_hdr), false);
+	if (err < 0 || !enable)
+		return err;
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_CMD_SET_BSS_CONNECTED, &req,
+				 sizeof(req), false);
+}

drivers/net/wireless/mediatek/mt76/mt7921/mcu.h

@@ -211,6 +211,7 @@ enum {
 	UNI_BSS_INFO_QBSS = 15,
 	UNI_BSS_INFO_UAPSD = 19,
 	UNI_BSS_INFO_PS = 21,
+	UNI_BSS_INFO_BCNFT = 22,
 };
 
 enum {

drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h

@@ -356,4 +356,8 @@ int mt7921_mcu_cancel_hw_scan(struct mt7921_phy *phy,
 			      struct ieee80211_vif *vif);
 u32 mt7921_get_wtbl_info(struct mt7921_dev *dev, u16 wlan_idx);
 int mt7921_mcu_uni_bss_ps(struct mt7921_dev *dev, struct ieee80211_vif *vif);
+int mt7921_mcu_uni_bss_bcnft(struct mt7921_dev *dev, struct ieee80211_vif *vif,
+			     bool enable);
+int mt7921_mcu_set_bss_pm(struct mt7921_dev *dev, struct ieee80211_vif *vif,
+			  bool enable);
 #endif