target/linux/mediatek/patches-5.4/999-4103-mtk-tunnel-crypto-offload-support.patch

--- a/drivers/net/ethernet/mediatek/mtk_hnat/hnat.h
+++ b/drivers/net/ethernet/mediatek/mtk_hnat/hnat.h
@@ -1144,6 +1144,8 @@ enum FoeIpAct {
 #define NR_EIP197_QDMA_TPORT 3
 #define NR_TDMA_TPORT 4
 #define NR_TDMA_QDMA_TPORT 5
+#define NR_TDMA_EIP197_TPORT 8
+#define NR_TDMA_EIP197_QDMA_TPORT 9
 #define LAN_DEV_NAME hnat_priv->lan
 #define LAN2_DEV_NAME hnat_priv->lan2
 #define IS_WAN(dev)                                                            \
--- a/drivers/net/ethernet/mediatek/mtk_hnat/hnat_nf_hook.c
+++ b/drivers/net/ethernet/mediatek/mtk_hnat/hnat_nf_hook.c
@@ -1101,7 +1101,8 @@ static unsigned int hnat_ipv4_get_nextho
 	 * outer header, we must update its outer mac header pointer
 	 * before filling outer mac or it may screw up inner mac
 	 */
-	if (skb_hnat_tops(skb) && skb_hnat_is_encap(skb)) {
+	if ((skb_hnat_tops(skb) && skb_hnat_is_encap(skb))
+	    || (skb_hnat_cdrt(skb) && skb_hnat_is_encrypt(skb))) {
 		skb_push(skb, sizeof(struct ethhdr));
 		skb_reset_mac_header(skb);
 	}
@@ -1110,7 +1111,8 @@ static unsigned int hnat_ipv4_get_nextho
 	memcpy(eth_hdr(skb)->h_source, out->dev_addr, ETH_ALEN);
 	eth_hdr(skb)->h_proto = htons(ETH_P_IP);
 
-	if (skb_hnat_tops(skb) && skb_hnat_is_encap(skb))
+	if ((skb_hnat_tops(skb) && skb_hnat_is_encap(skb))
+	    || (skb_hnat_cdrt(skb) && skb_hnat_is_encrypt(skb)))
 		skb_pull(skb, sizeof(struct ethhdr));
 
 	rcu_read_unlock_bh();
@@ -1258,6 +1260,38 @@ static inline void hnat_get_filled_unbin
 	entry->bfib1.ps = 0;
 }
 
+/*
+ * check offload engine data is prepared
+ * return 0 for packets not related to offload engine
+ * return positive value for offload engine prepared data done
+ * return negative value for data is still constructing
+ */
+static inline int hnat_offload_engine_done(struct sk_buff *skb,
+					   struct flow_offload_hw_path *hw_path)
+{
+	struct dst_entry *dst = skb_dst(skb);
+
+	if ((skb_hnat_tops(skb) && !(hw_path->flags & FLOW_OFFLOAD_PATH_TNL))) {
+		/* tunnel encap'ed */
+		if (dst && dst_xfrm(dst))
+			/*
+			 * skb not ready to bind since it is still needs
+			 * to be encrypted
+			 */
+			return -1;
+
+		/* nothing need to be done further for this skb */
+		return 1;
+	}
+
+	if (skb_hnat_cdrt(skb) && skb_hnat_is_encrypt(skb) && dst && !dst_xfrm(dst))
+		/* crypto encrypted done */
+		return 1;
+
+	/* no need for tunnel encapsulation or crypto encryption */
+	return 0;
+}
+
 static inline void hnat_qos_tnl(u32 id, const struct net_device *dev)
 {
 	u32 cfg;
@@ -1302,9 +1336,15 @@ static inline void hnat_fill_offload_eng
 		 * we fill in hnat tport and tops_entry for tunnel encapsulation
 		 * offloading
 		 */
-		entry->ipv4_hnapt.tport_id = NR_TDMA_QDMA_TPORT;
+		if (skb_hnat_cdrt(skb) && skb_hnat_is_encrypt(skb)) {
+			entry->ipv4_hnapt.tport_id = NR_TDMA_EIP197_QDMA_TPORT;
+			entry->ipv4_hnapt.cdrt_id = skb_hnat_cdrt(skb);
+		} else {
+			entry->ipv4_hnapt.tport_id = NR_TDMA_QDMA_TPORT;
+		}
 		entry->ipv4_hnapt.tops_entry = skb_hnat_tops(skb);
-	} else if (skb_hnat_cdrt(skb)) {
+
+	} else if (skb_hnat_cdrt(skb) && skb_hnat_is_encrypt(skb)) {
 		entry->ipv4_hnapt.tport_id = NR_EIP197_QDMA_TPORT;
 		entry->ipv4_hnapt.cdrt_id = skb_hnat_cdrt(skb);
 	} else {
@@ -1405,6 +1445,7 @@ static unsigned int skb_to_hnat_info(str
 	u32 port_id = 0;
 	u32 payload_len = 0;
 	int mape = 0;
+	int ret;
 	struct mtk_mac *mac = netdev_priv(dev);
 
 	ct = nf_ct_get(skb, &ctinfo);
@@ -1422,9 +1463,12 @@ static unsigned int skb_to_hnat_info(str
 	if (whnat && is_hnat_pre_filled(foe))
 		return 0;
 
-	if (skb_hnat_tops(skb) && !(hw_path->flags & FLOW_OFFLOAD_PATH_TNL)) {
+	ret = hnat_offload_engine_done(skb, hw_path);
+	if (ret == 1) {
 		hnat_get_filled_unbind_entry(skb, &entry);
 		goto hnat_entry_bind;
+	} else if (ret == -1) {
+		return 0;
 	}
 
 	entry.bfib1.pkt_type = foe->udib1.pkt_type; /* Get packte type state*/
@@ -1870,7 +1914,9 @@ static unsigned int skb_to_hnat_info(str
 	/* Fill Layer2 Info.*/
 	entry = ppe_fill_L2_info(eth, entry, hw_path);
 
-	if (skb_hnat_tops(skb) && hw_path->flags & FLOW_OFFLOAD_PATH_TNL)
+	if ((skb_hnat_tops(skb) && hw_path->flags & FLOW_OFFLOAD_PATH_TNL)
+	    || (!skb_hnat_cdrt(skb) && skb_hnat_is_encrypt(skb)
+		&& skb_dst(skb) && dst_xfrm(skb_dst(skb))))
 		goto hnat_entry_skip_bind;
 
 hnat_entry_bind:
@@ -2435,6 +2481,7 @@ int mtk_sw_nat_hook_rx(struct sk_buff *s
 	skb_hnat_alg(skb) = 0;
 	skb_hnat_set_tops(skb, 0);
 	skb_hnat_set_cdrt(skb, 0);
+	skb_hnat_set_is_decrypt(skb, 0);
 	skb_hnat_magic_tag(skb) = HNAT_MAGIC_TAG;
 
 	if (skb_hnat_iface(skb) == FOE_MAGIC_WED0)
@@ -3244,7 +3291,8 @@ mtk_hnat_ipv4_nf_local_out(void *priv, s
 		entry->udib1.pkt_type = IPV6_6RD;
 		hnat_set_head_frags(state, skb, 0, hnat_set_alg);
 	} else if (is_magic_tag_valid(skb)
-		   && (skb_hnat_cdrt(skb) || skb_hnat_tops(skb))) {
+		   && ((skb_hnat_cdrt(skb) && skb_hnat_is_encrypt(skb))
+		       || skb_hnat_tops(skb))) {
 		hnat_set_head_frags(state, skb, 0, hnat_set_alg);
 	} else {
 		hnat_set_head_frags(state, skb, 1, hnat_set_alg);
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2324,10 +2324,11 @@ static int mtk_poll_rx(struct napi_struc
 
 		skb_hnat_alg(skb) = 0;
 		skb_hnat_filled(skb) = 0;
-		skb_hnat_set_cdrt(skb, 0);
+		skb_hnat_set_cdrt(skb, RX_DMA_GET_CDRT(trxd.rxd7));
 		skb_hnat_magic_tag(skb) = HNAT_MAGIC_TAG;
 		skb_hnat_set_tops(skb, 0);
 		skb_hnat_set_is_decap(skb, 0);
+		skb_hnat_set_is_decrypt(skb, (skb_hnat_cdrt(skb) ? 1 : 0));
 
 		if (skb_hnat_reason(skb) == HIT_BIND_FORCE_TO_CPU) {
 			trace_printk("[%s] reason=0x%x(force to CPU) from WAN to Ext\n",
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -656,6 +656,9 @@
 #define RX_DMA_GET_AGG_CNT_V2(_x)	(((_x) >> 16) & 0xff)
 #define RX_DMA_GET_TOPS_CRSN(_x)	(((_x) >> 24) & 0xff)
 
+/* PDMA V2 descriptor rxd7 */
+#define RX_DMA_GET_CDRT(_x)		(((_x) >> 8) & 0xff)
+
 /* PHY Polling and SMI Master Control registers */
 #define MTK_PPSC		0x10000
 #define PPSC_MDC_CFG		GENMASK(29, 24)
--- a/drivers/net/ethernet/mediatek/mtk_hnat/nf_hnat_mtk.h
+++ b/drivers/net/ethernet/mediatek/mtk_hnat/nf_hnat_mtk.h
@@ -47,7 +47,8 @@ struct hnat_desc {
 	u32 tops : 6;
 	u32 is_decap : 1;
 	u32 cdrt : 8;
-	u32 resv3 : 4;
+	u32 is_decrypt : 1;
+	u32 resv3 : 3;
 	u32 magic_tag_protect : 16;
 } __packed;
 #elif defined(CONFIG_MEDIATEK_NETSYS_RX_V2)
@@ -101,7 +102,10 @@ struct hnat_desc {
 #define skb_hnat_set_tops(skb, tops) ((skb_hnat_tops(skb)) = (tops))
 #define skb_hnat_set_is_decap(skb, is_decap) ((skb_hnat_is_decap(skb)) = (is_decap))
 #define skb_hnat_cdrt(skb) (((struct hnat_desc *)((skb)->head))->cdrt)
+#define skb_hnat_is_decrypt(skb) (((struct hnat_desc *)((skb)->head))->is_decrypt)
+#define skb_hnat_is_encrypt(skb) (!skb_hnat_is_decrypt(skb))
 #define skb_hnat_set_cdrt(skb, cdrt) ((skb_hnat_cdrt(skb)) = (cdrt))
+#define skb_hnat_set_is_decrypt(skb, is_dec) ((skb_hnat_is_decrypt(skb)) = is_dec)
 #else /* !defined(CONFIG_MEDIATEK_NETSYS_V3) */
 #define skb_hnat_tops(skb) (0)
 #define skb_hnat_is_decap(skb) (0)
@@ -109,7 +113,10 @@ struct hnat_desc {
 #define skb_hnat_set_tops(skb, tops)
 #define skb_hnat_set_is_decap(skb, is_decap)
 #define skb_hnat_cdrt(skb) (0)
+#define skb_hnat_is_decrypt(skb) (0)
+#define skb_hnat_is_encrypt(skb) (0)
 #define skb_hnat_set_cdrt(skb, cdrt)
+#define skb_hnat_set_is_decrypt(skb, is_dec)
 #endif /* defined(CONFIG_MEDIATEK_NETSYS_V3) */
 #define skb_hnat_magic(skb) (((struct hnat_desc *)(skb->head))->magic)
 #define skb_hnat_reason(skb) (((struct hnat_desc *)(skb->head))->crsn)