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>

1 files changed, 101 insertions, 38 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
index 5c86e28bcd21..b5e27c29b1c4 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
@@ -2171,7 +2171,6 @@ out:
 
 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)
@@ -2192,43 +2191,22 @@ mt7996_mcu_sta_key_tlv(struct mt76_wcid *wcid,
 			return -EOPNOTSUPP;
 
 		sec_key = &sec->key[0];
+		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);
-
-		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->cipher_id = cipher;
-			sec_key->key_id = key->keyidx;
-			sec_key->key_len = key->keylen;
-			memcpy(sec_key->key, key->key, key->keylen);
-
-			if (cipher == MCU_CIPHER_TKIP) {
-				/* Rx/Tx MIC keys are swapped */
-				memcpy(sec_key->key + 16, key->key + 24, 8);
-				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;
+		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) {
+			/* Rx/Tx MIC keys are swapped */
+			memcpy(sec_key->key + 16, key->key + 24, 8);
+			memcpy(sec_key->key + 24, key->key + 16, 8);
 		}
+
+		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)
 {