wifi: mt76: connac: add beacon protection support for mt7996

Implement beacon protection feature for mt7996 chipsets, and also do
some cleanup on the set key routine.
Co-developed-by: Rudra Shahi <rudra.shahi@mediatek.com>
Signed-off-by: Rudra Shahi <rudra.shahi@mediatek.com>
Signed-off-by: Allen Ye <allen.ye@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h

@@ -416,6 +416,14 @@ struct sta_rec_he_6g_capa {
 	u8 rsv[2];
 } __packed;
 
+struct sta_rec_pn_info {
+	__le16 tag;
+	__le16 len;
+	u8 pn[6];
+	u8 tsc_type;
+	u8 rsv;
+} __packed;
+
 struct sec_key {
 	u8 cipher_id;
 	u8 cipher_len;
@@ -768,6 +776,7 @@ struct wtbl_raw {
 					 sizeof(struct sta_rec_sec) +	\
 					 sizeof(struct sta_rec_ra_fixed) + \
 					 sizeof(struct sta_rec_he_6g_capa) + \
+					 sizeof(struct sta_rec_pn_info) + \
 					 sizeof(struct tlv) +		\
 					 MT76_CONNAC_WTBL_UPDATE_MAX_SIZE)
 
@@ -798,6 +807,7 @@ enum {
 	STA_REC_HE_V2 = 0x19,
 	STA_REC_MLD = 0x20,
 	STA_REC_EHT = 0x22,
+	STA_REC_PN_INFO = 0x26,
 	STA_REC_HDRT = 0x28,
 	STA_REC_HDR_TRANS = 0x2B,
 	STA_REC_MAX_NUM
@@ -1090,6 +1100,13 @@ enum mcu_cipher_type {
 	MCU_CIPHER_GCMP_256,
 	MCU_CIPHER_WAPI,
 	MCU_CIPHER_BIP_CMAC_128,
+	MCU_CIPHER_BIP_CMAC_256,
+	MCU_CIPHER_BCN_PROT_CMAC_128,
+	MCU_CIPHER_BCN_PROT_CMAC_256,
+	MCU_CIPHER_BCN_PROT_GMAC_128,
+	MCU_CIPHER_BCN_PROT_GMAC_256,
+	MCU_CIPHER_BIP_GMAC_128,
+	MCU_CIPHER_BIP_GMAC_256,
 };
 
 enum {
@@ -1310,6 +1327,7 @@ enum {
 	UNI_BSS_INFO_RATE = 11,
 	UNI_BSS_INFO_QBSS = 15,
 	UNI_BSS_INFO_SEC = 16,
+	UNI_BSS_INFO_BCN_PROT = 17,
 	UNI_BSS_INFO_TXCMD = 18,
 	UNI_BSS_INFO_UAPSD = 19,
 	UNI_BSS_INFO_PS = 21,
@@ -1771,6 +1789,12 @@ mt76_connac_mcu_get_cipher(int cipher)
 		return MCU_CIPHER_GCMP;
 	case WLAN_CIPHER_SUITE_GCMP_256:
 		return MCU_CIPHER_GCMP_256;
+	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
+		return MCU_CIPHER_BIP_GMAC_128;
+	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
+		return MCU_CIPHER_BIP_GMAC_256;
+	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
+		return MCU_CIPHER_BIP_CMAC_256;
 	case WLAN_CIPHER_SUITE_SMS4:
 		return MCU_CIPHER_WAPI;
 	default:

drivers/net/wireless/mediatek/mt76/mt7996/main.c

@@ -350,6 +350,8 @@ static int mt7996_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 	case WLAN_CIPHER_SUITE_GCMP:
 	case WLAN_CIPHER_SUITE_GCMP_256:
 	case WLAN_CIPHER_SUITE_SMS4:
+	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
+	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 		break;
 	case WLAN_CIPHER_SUITE_WEP40:
 	case WLAN_CIPHER_SUITE_WEP104:
@@ -373,8 +375,12 @@ static int mt7996_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 	}
 
 	mt76_wcid_key_setup(&dev->mt76, wcid, key);
-	err = mt7996_mcu_add_key(&dev->mt76, vif, &msta->bip,
-				 key, MCU_WMWA_UNI_CMD(STA_REC_UPDATE),
+
+	if (key->keyidx == 6 || key->keyidx == 7)
+		err = mt7996_mcu_bcn_prot_enable(dev, vif, key);
+	else
+		err = mt7996_mcu_add_key(&dev->mt76, vif, key,
+					 MCU_WMWA_UNI_CMD(STA_REC_UPDATE),
 					 &msta->wcid, cmd);
 out:
 	mutex_unlock(&dev->mt76.mutex);

drivers/net/wireless/mediatek/mt76/mt7996/mcu.c

@@ -2171,7 +2171,6 @@ int mt7996_mcu_add_sta(struct mt7996_dev *dev, struct ieee80211_vif *vif,
 
 static int
 mt7996_mcu_sta_key_tlv(struct mt76_wcid *wcid,
-		       struct mt76_connac_sta_key_conf *sta_key_conf,
 		       struct sk_buff *skb,
 		       struct ieee80211_key_conf *key,
 		       enum set_key_cmd cmd)
@@ -2192,27 +2191,13 @@ mt7996_mcu_sta_key_tlv(struct mt76_wcid *wcid,
 			return -EOPNOTSUPP;
 
 		sec_key = &sec->key[0];
-		sec_key->cipher_len = sizeof(*sec_key);
-
-		if (cipher == MCU_CIPHER_BIP_CMAC_128) {
-			sec_key->wlan_idx = cpu_to_le16(wcid->idx);
-			sec_key->cipher_id = MCU_CIPHER_AES_CCMP;
-			sec_key->key_id = sta_key_conf->keyidx;
-			sec_key->key_len = 16;
-			memcpy(sec_key->key, sta_key_conf->key, 16);
-
-			sec_key = &sec->key[1];
-			sec_key->wlan_idx = cpu_to_le16(wcid->idx);
-			sec_key->cipher_id = MCU_CIPHER_BIP_CMAC_128;
-			sec_key->cipher_len = sizeof(*sec_key);
-			sec_key->key_len = 16;
-			memcpy(sec_key->key, key->key, 16);
-			sec->n_cipher = 2;
-		} else {
 		sec_key->wlan_idx = cpu_to_le16(wcid->idx);
+		sec_key->mgmt_prot = 0;
 		sec_key->cipher_id = cipher;
+		sec_key->cipher_len = sizeof(*sec_key);
 		sec_key->key_id = key->keyidx;
 		sec_key->key_len = key->keylen;
+		sec_key->need_resp = 0;
 		memcpy(sec_key->key, key->key, key->keylen);
 
 		if (cipher == MCU_CIPHER_TKIP) {
@@ -2221,14 +2206,7 @@ mt7996_mcu_sta_key_tlv(struct mt76_wcid *wcid,
 			memcpy(sec_key->key + 24, key->key + 16, 8);
 		}
 
-			/* store key_conf for BIP batch update */
-			if (cipher == MCU_CIPHER_AES_CCMP) {
-				memcpy(sta_key_conf->key, key->key, key->keylen);
-				sta_key_conf->keyidx = key->keyidx;
-			}
-
 		sec->n_cipher = 1;
-		}
 	} else {
 		sec->n_cipher = 0;
 	}
@@ -2237,7 +2215,6 @@ mt7996_mcu_sta_key_tlv(struct mt76_wcid *wcid,
 }
 
 int mt7996_mcu_add_key(struct mt76_dev *dev, struct ieee80211_vif *vif,
-		       struct mt76_connac_sta_key_conf *sta_key_conf,
 		       struct ieee80211_key_conf *key, int mcu_cmd,
 		       struct mt76_wcid *wcid, enum set_key_cmd cmd)
 {
@@ -2250,13 +2227,99 @@ int mt7996_mcu_add_key(struct mt76_dev *dev, struct ieee80211_vif *vif,
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);
 
-	ret = mt7996_mcu_sta_key_tlv(wcid, sta_key_conf, skb, key, cmd);
+	ret = mt7996_mcu_sta_key_tlv(wcid, skb, key, cmd);
 	if (ret)
 		return ret;
 
 	return mt76_mcu_skb_send_msg(dev, skb, mcu_cmd, true);
 }
 
+static int mt7996_mcu_get_pn(struct mt7996_dev *dev, struct ieee80211_vif *vif,
+			     u8 *pn)
+{
+#define TSC_TYPE_BIGTK_PN 2
+	struct mt7996_vif *mvif = (struct mt7996_vif *)vif->drv_priv;
+	struct sta_rec_pn_info *pn_info;
+	struct sk_buff *skb, *rskb;
+	struct tlv *tlv;
+	int ret;
+
+	skb = mt76_connac_mcu_alloc_sta_req(&dev->mt76, &mvif->mt76, &mvif->sta.wcid);
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	tlv = mt76_connac_mcu_add_tlv(skb, STA_REC_PN_INFO, sizeof(*pn_info));
+	pn_info = (struct sta_rec_pn_info *)tlv;
+
+	pn_info->tsc_type = TSC_TYPE_BIGTK_PN;
+	ret = mt76_mcu_skb_send_and_get_msg(&dev->mt76, skb,
+					    MCU_WM_UNI_CMD_QUERY(STA_REC_UPDATE),
+					    true, &rskb);
+	if (ret)
+		return ret;
+
+	skb_pull(rskb, 4);
+
+	pn_info = (struct sta_rec_pn_info *)rskb->data;
+	if (le16_to_cpu(pn_info->tag) == STA_REC_PN_INFO)
+		memcpy(pn, pn_info->pn, 6);
+
+	dev_kfree_skb(rskb);
+	return 0;
+}
+
+int mt7996_mcu_bcn_prot_enable(struct mt7996_dev *dev, struct ieee80211_vif *vif,
+			       struct ieee80211_key_conf *key)
+{
+	struct mt7996_vif *mvif = (struct mt7996_vif *)vif->drv_priv;
+	struct mt7996_mcu_bcn_prot_tlv *bcn_prot;
+	struct sk_buff *skb;
+	struct tlv *tlv;
+	u8 pn[6] = {};
+	int len = sizeof(struct bss_req_hdr) +
+		  sizeof(struct mt7996_mcu_bcn_prot_tlv);
+	int ret;
+
+	skb = __mt7996_mcu_alloc_bss_req(&dev->mt76, &mvif->mt76, len);
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	tlv = mt76_connac_mcu_add_tlv(skb, UNI_BSS_INFO_BCN_PROT, sizeof(*bcn_prot));
+
+	bcn_prot = (struct mt7996_mcu_bcn_prot_tlv *)tlv;
+
+	ret = mt7996_mcu_get_pn(dev, vif, pn);
+	if (ret) {
+		dev_kfree_skb(skb);
+		return ret;
+	}
+
+	switch (key->cipher) {
+	case WLAN_CIPHER_SUITE_AES_CMAC:
+		bcn_prot->cipher_id = MCU_CIPHER_BCN_PROT_CMAC_128;
+		break;
+	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
+		bcn_prot->cipher_id = MCU_CIPHER_BCN_PROT_GMAC_128;
+		break;
+	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
+		bcn_prot->cipher_id = MCU_CIPHER_BCN_PROT_GMAC_256;
+		break;
+	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
+	default:
+		dev_err(dev->mt76.dev, "Not supported Bigtk Cipher\n");
+		dev_kfree_skb(skb);
+		return -EOPNOTSUPP;
+	}
+
+	pn[0]++;
+	memcpy(bcn_prot->pn, pn, 6);
+	bcn_prot->enable = BP_SW_MODE;
+	memcpy(bcn_prot->key, key->key, WLAN_MAX_KEY_LEN);
+	bcn_prot->key_id = key->keyidx;
+
+	return mt76_mcu_skb_send_msg(&dev->mt76, skb,
+				     MCU_WMWA_UNI_CMD(BSS_INFO_UPDATE), true);
+}
 int mt7996_mcu_add_dev_info(struct mt7996_phy *phy,
 			    struct ieee80211_vif *vif, bool enable)
 {

drivers/net/wireless/mediatek/mt76/mt7996/mcu.h

@@ -345,6 +345,23 @@ struct bss_rate_tlv {
 	u8 __rsv2[9];
 } __packed;
 
+enum {
+	BP_DISABLE,
+	BP_SW_MODE,
+	BP_HW_MODE,
+};
+
+struct mt7996_mcu_bcn_prot_tlv {
+	__le16 tag;
+	__le16 len;
+	u8 pn[6];
+	u8 enable;
+	u8 cipher_id;
+	u8 key[WLAN_MAX_KEY_LEN];
+	u8 key_id;
+	u8 __rsv[3];
+} __packed;
+
 struct bss_ra_tlv {
 	__le16 tag;
 	__le16 len;

drivers/net/wireless/mediatek/mt76/mt7996/mt7996.h

@@ -584,9 +584,10 @@ int mt7996_init_debugfs(struct mt7996_phy *phy);
 void mt7996_debugfs_rx_fw_monitor(struct mt7996_dev *dev, const void *data, int len);
 bool mt7996_debugfs_rx_log(struct mt7996_dev *dev, const void *data, int len);
 int mt7996_mcu_add_key(struct mt76_dev *dev, struct ieee80211_vif *vif,
-		       struct mt76_connac_sta_key_conf *sta_key_conf,
 		       struct ieee80211_key_conf *key, int mcu_cmd,
 		       struct mt76_wcid *wcid, enum set_key_cmd cmd);
+int mt7996_mcu_bcn_prot_enable(struct mt7996_dev *dev, struct ieee80211_vif *vif,
+			       struct ieee80211_key_conf *key);
 int mt7996_mcu_wtbl_update_hdr_trans(struct mt7996_dev *dev,
 				     struct ieee80211_vif *vif,
 				     struct ieee80211_sta *sta);