mt76: mt7915: fix MT_CIPHER_BIP_CMAC_128 setkey

MCU expects to set WLAN_CIPHER_SUITE_CCMP and WLAN_CIPHER_SUITE_AES_CMAC
at the same time, so adding an intermediate buffer for batch update.
Tested-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/mcu.c

@@ -1016,9 +1016,10 @@ int mt7915_mcu_add_bss_info(struct mt7915_phy *phy,
 
 /** starec & wtbl **/
 static int
-mt7915_mcu_sta_key_tlv(struct sk_buff *skb, struct ieee80211_key_conf *key,
-		       enum set_key_cmd cmd)
+mt7915_mcu_sta_key_tlv(struct mt7915_sta *msta, struct sk_buff *skb,
+		       struct ieee80211_key_conf *key, enum set_key_cmd cmd)
 {
+	struct mt7915_sta_key_conf *bip = &msta->bip;
 	struct sta_rec_sec *sec;
 	struct tlv *tlv;
 	u32 len = sizeof(*sec);
@@ -1038,22 +1039,23 @@ mt7915_mcu_sta_key_tlv(struct sk_buff *skb, struct ieee80211_key_conf *key,
 
 		sec_key = &sec->key[0];
 		sec_key->cipher_len = sizeof(*sec_key);
-		sec_key->key_id = key->keyidx;
 
 		if (cipher == MT_CIPHER_BIP_CMAC_128) {
 			sec_key->cipher_id = MT_CIPHER_AES_CCMP;
+			sec_key->key_id = bip->keyidx;
 			sec_key->key_len = 16;
-			memcpy(sec_key->key, key->key, 16);
+			memcpy(sec_key->key, bip->key, 16);
 
 			sec_key = &sec->key[1];
 			sec_key->cipher_id = MT_CIPHER_BIP_CMAC_128;
 			sec_key->cipher_len = sizeof(*sec_key);
 			sec_key->key_len = 16;
-			memcpy(sec_key->key, key->key + 16, 16);
+			memcpy(sec_key->key, key->key, 16);
 
 			sec->n_cipher = 2;
 		} else {
 			sec_key->cipher_id = cipher;
+			sec_key->key_id = key->keyidx;
 			sec_key->key_len = key->keylen;
 			memcpy(sec_key->key, key->key, key->keylen);
 
@@ -1063,6 +1065,12 @@ mt7915_mcu_sta_key_tlv(struct sk_buff *skb, struct ieee80211_key_conf *key,
 				memcpy(sec_key->key + 24, key->key + 16, 8);
 			}
 
+			/* store key_conf for BIP batch update */
+			if (cipher == MT_CIPHER_AES_CCMP) {
+				memcpy(bip->key, key->key, key->keylen);
+				bip->keyidx = key->keyidx;
+			}
+
 			len -= sizeof(*sec_key);
 			sec->n_cipher = 1;
 		}
@@ -1088,7 +1096,7 @@ int mt7915_mcu_add_key(struct mt7915_dev *dev, struct ieee80211_vif *vif,
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);
 
-	ret = mt7915_mcu_sta_key_tlv(skb, key, cmd);
+	ret = mt7915_mcu_sta_key_tlv(msta, skb, key, cmd);
 	if (ret)
 		return ret;
 

drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h

@@ -72,6 +72,11 @@ struct mt7915_sta_stats {
 	unsigned long jiffies;
 };
 
+struct mt7915_sta_key_conf {
+	s8 keyidx;
+	u8 key[16];
+};
+
 struct mt7915_sta {
 	struct mt76_wcid wcid; /* must be first */
 
@@ -85,6 +90,8 @@ struct mt7915_sta {
 	struct mt7915_sta_stats stats;
 
 	unsigned long ampdu_state;
+
+	struct mt7915_sta_key_conf bip;
 };
 
 struct mt7915_vif {