mt76: mt7663: introduce ARP filter offload

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

drivers/net/wireless/mediatek/mt76/mt7615/main.c

@@ -491,6 +491,9 @@ static void mt7615_bss_info_changed(struct ieee80211_hw *hw,
 	if (changed & BSS_CHANGED_PS)
 		mt7615_mcu_set_vif_ps(dev, vif);
 
+	if (changed & BSS_CHANGED_ARP_FILTER)
+		mt7615_mcu_update_arp_filter(hw, vif, info);
+
 	mutex_unlock(&dev->mt76.mutex);
 }
 

drivers/net/wireless/mediatek/mt76/mt7615/mcu.c

@@ -3542,6 +3542,32 @@ mt7615_mcu_set_gtk_rekey(struct mt7615_dev *dev,
 				   &req, sizeof(req), true);
 }
 
+static int
+mt7615_mcu_set_arp_filter(struct mt7615_dev *dev, struct ieee80211_vif *vif,
+			  bool suspend)
+{
+	struct mt7615_vif *mvif = (struct mt7615_vif *)vif->drv_priv;
+	struct {
+		struct {
+			u8 bss_idx;
+			u8 pad[3];
+		} __packed hdr;
+		struct mt7615_arpns_tlv arpns;
+	} req = {
+		.hdr = {
+			.bss_idx = mvif->idx,
+		},
+		.arpns = {
+			.tag = cpu_to_le16(UNI_OFFLOAD_OFFLOAD_ARP),
+			.len = cpu_to_le16(sizeof(struct mt7615_arpns_tlv)),
+			.mode = suspend,
+		},
+	};
+
+	return __mt76_mcu_send_msg(&dev->mt76, MCU_UNI_CMD_OFFLOAD,
+				   &req, sizeof(req), true);
+}
+
 void mt7615_mcu_set_suspend_iter(void *priv, u8 *mac,
 				 struct ieee80211_vif *vif)
 {
@@ -3554,6 +3580,7 @@ void mt7615_mcu_set_suspend_iter(void *priv, u8 *mac,
 	mt7615_mcu_set_bss_pm(phy->dev, vif, suspend);
 
 	mt7615_mcu_set_gtk_rekey(phy->dev, vif, suspend);
+	mt7615_mcu_set_arp_filter(phy->dev, vif, suspend);
 
 	mt7615_mcu_set_suspend_mode(phy->dev, vif, suspend, 1, true);
 
@@ -3653,6 +3680,53 @@ int mt7615_mcu_set_roc(struct mt7615_phy *phy, struct ieee80211_vif *vif,
 				   sizeof(req), false);
 }
 
+int mt7615_mcu_update_arp_filter(struct ieee80211_hw *hw,
+				 struct ieee80211_vif *vif,
+				 struct ieee80211_bss_conf *info)
+{
+	struct mt7615_vif *mvif = (struct mt7615_vif *)vif->drv_priv;
+	struct mt7615_dev *dev = mt7615_hw_dev(hw);
+	struct sk_buff *skb;
+	int i, len = min_t(int, info->arp_addr_cnt,
+			   IEEE80211_BSS_ARP_ADDR_LIST_LEN);
+	struct {
+		struct {
+			u8 bss_idx;
+			u8 pad[3];
+		} __packed hdr;
+		struct mt7615_arpns_tlv arp;
+	} req_hdr = {
+		.hdr = {
+			.bss_idx = mvif->idx,
+		},
+		.arp = {
+			.tag = cpu_to_le16(UNI_OFFLOAD_OFFLOAD_ARP),
+			.len = cpu_to_le16(sizeof(struct mt7615_arpns_tlv)),
+			.ips_num = len,
+			.mode = 2,  /* update */
+			.option = 1,
+		},
+	};
+
+	if (!mt7615_firmware_offload(dev))
+		return 0;
+
+	skb = mt76_mcu_msg_alloc(&dev->mt76, NULL,
+				 sizeof(req_hdr) + len * sizeof(__be32));
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put_data(skb, &req_hdr, sizeof(req_hdr));
+	for (i = 0; i < len; i++) {
+		u8 *addr = (u8 *)skb_put(skb, sizeof(__be32));
+
+		memcpy(addr, &info->arp_addr_list[i], sizeof(__be32));
+	}
+
+	return __mt76_mcu_skb_send_msg(&dev->mt76, skb,
+				       MCU_UNI_CMD_OFFLOAD, true);
+}
+
 int mt7615_mcu_set_p2p_oppps(struct ieee80211_hw *hw,
 			     struct ieee80211_vif *vif)
 {

drivers/net/wireless/mediatek/mt76/mt7615/mcu.h

@@ -545,6 +545,15 @@ struct mt7615_roc_tlv {
 	u8 rsv1[8];
 } __packed;
 
+struct mt7615_arpns_tlv {
+	__le16 tag;
+	__le16 len;
+	u8 mode;
+	u8 ips_num;
+	u8 option;
+	u8 pad[1];
+} __packed;
+
 /* offload mcu commands */
 enum {
 	MCU_CMD_START_HW_SCAN = MCU_CE_PREFIX | 0x03,
@@ -580,8 +589,8 @@ enum {
 };
 
 enum {
-	UNI_OFFLOAD_OFFLOAD_ARPNS_IPV4,
-	UNI_OFFLOAD_OFFLOAD_ARPNS_IPV6,
+	UNI_OFFLOAD_OFFLOAD_ARP,
+	UNI_OFFLOAD_OFFLOAD_ND,
 	UNI_OFFLOAD_OFFLOAD_GTK_REKEY,
 	UNI_OFFLOAD_OFFLOAD_BMC_RPY_DETECT,
 };

drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h

@@ -586,7 +586,9 @@ void mt7615_mcu_set_suspend_iter(void *priv, u8 *mac,
 int mt7615_mcu_update_gtk_rekey(struct ieee80211_hw *hw,
 				struct ieee80211_vif *vif,
 				struct cfg80211_gtk_rekey_data *key);
-
+int mt7615_mcu_update_arp_filter(struct ieee80211_hw *hw,
+				 struct ieee80211_vif *vif,
+				 struct ieee80211_bss_conf *info);
 int __mt7663_load_firmware(struct mt7615_dev *dev);
 
 /* usb */