ath11k: fix 4addr multicast packet tx

In 4addr, AP wired backbone to STA wired backbone ping fails due to ARP
request not getting answered. Here 4addr ARP multicast packet is sent in
3addr, so that 4addr STA not honouring the 3addr ARP multicast packet.
Fix this issue by sending out multicast packet in 4addr format, firmware
expects peer meta flag instead of vdev meta flag in Tx descriptor.

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01641-QCAHKSWPL_SILICONZ-1
Signed-off-by: Karthikeyan Periyasamy <periyasa@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210720213147.90042-2-jouni@codeaurora.org

drivers/net/wireless/ath/ath11k/core.h

@@ -377,6 +377,7 @@ struct ath11k_sta {
 #endif
 
 	bool use_4addr_set;
+	u16 tcl_metadata;
 };
 
 #define ATH11K_MIN_5G_FREQ 4150

drivers/net/wireless/ath/ath11k/dp_tx.c

@@ -78,7 +78,7 @@ enum hal_encrypt_type ath11k_dp_tx_get_encrypt_type(u32 cipher)
 }
 
 int ath11k_dp_tx(struct ath11k *ar, struct ath11k_vif *arvif,
-		 struct sk_buff *skb)
+		 struct ath11k_sta *arsta, struct sk_buff *skb)
 {
 	struct ath11k_base *ab = ar->ab;
 	struct ath11k_dp *dp = &ab->dp;
@@ -145,7 +145,15 @@ int ath11k_dp_tx(struct ath11k *ar, struct ath11k_vif *arvif,
 		     FIELD_PREP(DP_TX_DESC_ID_MSDU_ID, ret) |
 		     FIELD_PREP(DP_TX_DESC_ID_POOL_ID, pool_id);
 	ti.encap_type = ath11k_dp_tx_get_encap_type(arvif, skb);
+
+	if (ieee80211_has_a4(hdr->frame_control) &&
+	    is_multicast_ether_addr(hdr->addr3) && arsta &&
+	    arsta->use_4addr_set) {
+		ti.meta_data_flags = arsta->tcl_metadata;
+		ti.flags0 |= FIELD_PREP(HAL_TCL_DATA_CMD_INFO1_TO_FW, 1);
+	} else {
 		ti.meta_data_flags = arvif->tcl_metadata;
+	}
 
 	if (ti.encap_type == HAL_TCL_ENCAP_TYPE_RAW) {
 		if (skb_cb->flags & ATH11K_SKB_CIPHER_SET) {

drivers/net/wireless/ath/ath11k/dp_tx.h

@@ -17,7 +17,7 @@ struct ath11k_dp_htt_wbm_tx_status {
 
 int ath11k_dp_tx_htt_h2t_ver_req_msg(struct ath11k_base *ab);
 int ath11k_dp_tx(struct ath11k *ar, struct ath11k_vif *arvif,
-		 struct sk_buff *skb);
+		 struct ath11k_sta *arsta, struct sk_buff *skb);
 void ath11k_dp_tx_completion_handler(struct ath11k_base *ab, int ring_id);
 int ath11k_dp_tx_send_reo_cmd(struct ath11k_base *ab, struct dp_rx_tid *rx_tid,
 			      enum hal_reo_cmd_type type,

drivers/net/wireless/ath/ath11k/mac.c

@@ -4356,6 +4356,7 @@ static void ath11k_mac_op_tx(struct ieee80211_hw *hw,
 	struct ath11k_vif *arvif = ath11k_vif_to_arvif(vif);
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 	struct ieee80211_key_conf *key = info->control.hw_key;
+	struct ath11k_sta *arsta = NULL;
 	u32 info_flags = info->flags;
 	bool is_prb_rsp;
 	int ret;
@@ -4381,7 +4382,10 @@ static void ath11k_mac_op_tx(struct ieee80211_hw *hw,
 		return;
 	}
 
-	ret = ath11k_dp_tx(ar, arvif, skb);
+	if (control->sta)
+		arsta = (struct ath11k_sta *)control->sta->drv_priv;
+
+	ret = ath11k_dp_tx(ar, arvif, arsta, skb);
 	if (ret) {
 		ath11k_warn(ar->ab, "failed to transmit frame %d\n", ret);
 		ieee80211_free_txskb(ar->hw, skb);

drivers/net/wireless/ath/ath11k/peer.c

@@ -251,6 +251,7 @@ int ath11k_peer_create(struct ath11k *ar, struct ath11k_vif *arvif,
 		       struct ieee80211_sta *sta, struct peer_create_params *param)
 {
 	struct ath11k_peer *peer;
+	struct ath11k_sta *arsta;
 	int ret;
 
 	lockdep_assert_held(&ar->conf_mutex);
@@ -319,6 +320,16 @@ int ath11k_peer_create(struct ath11k *ar, struct ath11k_vif *arvif,
 	peer->sec_type = HAL_ENCRYPT_TYPE_OPEN;
 	peer->sec_type_grp = HAL_ENCRYPT_TYPE_OPEN;
 
+	if (sta) {
+		arsta = (struct ath11k_sta *)sta->drv_priv;
+		arsta->tcl_metadata |= FIELD_PREP(HTT_TCL_META_DATA_TYPE, 0) |
+				       FIELD_PREP(HTT_TCL_META_DATA_PEER_ID,
+						  peer->peer_id);
+
+		/* set HTT extension valid bit to 0 by default */
+		arsta->tcl_metadata &= ~HTT_TCL_META_DATA_VALID_HTT;
+	}
+
 	ar->num_peers++;
 
 	spin_unlock_bh(&ar->ab->base_lock);