Merge branch 'net-airoha-fix-ipv6-hw-acceleration'

Lorenzo Bianconi says:

====================
net: airoha: Fix IPv6 hw acceleration

Fix IPv6 hw acceleration in bridge mode resolving ib2 and
airoha_foe_mac_info_common overwrite in
airoha_ppe_foe_commit_subflow_entry routine.
Introduce UPDMEM source-mac table used to set source mac address for
L3 IPv6 hw accelerated traffic.
====================

Link: https://patch.msgid.link/20250602-airoha-flowtable-ipv6-fix-v2-0-3287f8b55214@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: Paolo Abeni

drivers/net/ethernet/airoha/airoha_eth.c

@@ -84,6 +84,8 @@ static void airoha_set_macaddr(struct airoha_gdm_port *port, const u8 *addr)
 	val = (addr[3] << 16) | (addr[4] << 8) | addr[5];
 	airoha_fe_wr(eth, REG_FE_MAC_LMIN(reg), val);
 	airoha_fe_wr(eth, REG_FE_MAC_LMAX(reg), val);
+
+	airoha_ppe_init_upd_mem(port);
 }
 
 static void airoha_set_gdm_port_fwd_cfg(struct airoha_eth *eth, u32 addr,

drivers/net/ethernet/airoha/airoha_eth.h

@@ -614,6 +614,7 @@ void airoha_ppe_check_skb(struct airoha_ppe *ppe, struct sk_buff *skb,
 int airoha_ppe_setup_tc_block_cb(struct net_device *dev, void *type_data);
 int airoha_ppe_init(struct airoha_eth *eth);
 void airoha_ppe_deinit(struct airoha_eth *eth);
+void airoha_ppe_init_upd_mem(struct airoha_gdm_port *port);
 struct airoha_foe_entry *airoha_ppe_foe_get_entry(struct airoha_ppe *ppe,
 						  u32 hash);
 void airoha_ppe_foe_entry_get_stats(struct airoha_ppe *ppe, u32 hash,

drivers/net/ethernet/airoha/airoha_ppe.c

@@ -223,6 +223,7 @@ static int airoha_ppe_foe_entry_prepare(struct airoha_eth *eth,
 	int dsa_port = airoha_get_dsa_port(&dev);
 	struct airoha_foe_mac_info_common *l2;
 	u32 qdata, ports_pad, val;
+	u8 smac_id = 0xf;
 
 	memset(hwe, 0, sizeof(*hwe));
 
@@ -257,6 +258,8 @@ static int airoha_ppe_foe_entry_prepare(struct airoha_eth *eth,
 		 */
 		if (airhoa_is_lan_gdm_port(port))
 			val |= AIROHA_FOE_IB2_FAST_PATH;
+
+		smac_id = port->id;
 	}
 
 	if (is_multicast_ether_addr(data->eth.h_dest))
@@ -291,7 +294,7 @@ static int airoha_ppe_foe_entry_prepare(struct airoha_eth *eth,
 		hwe->ipv4.l2.src_mac_lo =
 			get_unaligned_be16(data->eth.h_source + 4);
 	} else {
-		l2->src_mac_hi = FIELD_PREP(AIROHA_FOE_MAC_SMAC_ID, 0xf);
+		l2->src_mac_hi = FIELD_PREP(AIROHA_FOE_MAC_SMAC_ID, smac_id);
 	}
 
 	if (data->vlan.num) {
@@ -636,7 +639,6 @@ airoha_ppe_foe_commit_subflow_entry(struct airoha_ppe *ppe,
 	u32 mask = AIROHA_FOE_IB1_BIND_PACKET_TYPE | AIROHA_FOE_IB1_BIND_UDP;
 	struct airoha_foe_entry *hwe_p, hwe;
 	struct airoha_flow_table_entry *f;
-	struct airoha_foe_mac_info *l2;
 	int type;
 
 	hwe_p = airoha_ppe_foe_get_entry(ppe, hash);
@@ -653,18 +655,25 @@ airoha_ppe_foe_commit_subflow_entry(struct airoha_ppe *ppe,
 
 	memcpy(&hwe, hwe_p, sizeof(*hwe_p));
 	hwe.ib1 = (hwe.ib1 & mask) | (e->data.ib1 & ~mask);
-	l2 = &hwe.bridge.l2;
-	memcpy(l2, &e->data.bridge.l2, sizeof(*l2));
 
 	type = FIELD_GET(AIROHA_FOE_IB1_BIND_PACKET_TYPE, hwe.ib1);
-	if (type == PPE_PKT_TYPE_IPV4_HNAPT)
-		memcpy(&hwe.ipv4.new_tuple, &hwe.ipv4.orig_tuple,
-		       sizeof(hwe.ipv4.new_tuple));
-	else if (type >= PPE_PKT_TYPE_IPV6_ROUTE_3T &&
-		 l2->common.etype == ETH_P_IP)
-		l2->common.etype = ETH_P_IPV6;
-
-	hwe.bridge.ib2 = e->data.bridge.ib2;
+	if (type >= PPE_PKT_TYPE_IPV6_ROUTE_3T) {
+		memcpy(&hwe.ipv6.l2, &e->data.bridge.l2, sizeof(hwe.ipv6.l2));
+		hwe.ipv6.ib2 = e->data.bridge.ib2;
+		/* setting smac_id to 0xf instruct the hw to keep original
+		 * source mac address
+		 */
+		hwe.ipv6.l2.src_mac_hi = FIELD_PREP(AIROHA_FOE_MAC_SMAC_ID,
+						    0xf);
+	} else {
+		memcpy(&hwe.bridge.l2, &e->data.bridge.l2,
+		       sizeof(hwe.bridge.l2));
+		hwe.bridge.ib2 = e->data.bridge.ib2;
+		if (type == PPE_PKT_TYPE_IPV4_HNAPT)
+			memcpy(&hwe.ipv4.new_tuple, &hwe.ipv4.orig_tuple,
+			       sizeof(hwe.ipv4.new_tuple));
+	}
+
 	hwe.bridge.data = e->data.bridge.data;
 	airoha_ppe_foe_commit_entry(ppe, &hwe, hash);
 
@@ -1238,6 +1247,27 @@ void airoha_ppe_check_skb(struct airoha_ppe *ppe, struct sk_buff *skb,
 	airoha_ppe_foe_insert_entry(ppe, skb, hash);
 }
 
+void airoha_ppe_init_upd_mem(struct airoha_gdm_port *port)
+{
+	struct airoha_eth *eth = port->qdma->eth;
+	struct net_device *dev = port->dev;
+	const u8 *addr = dev->dev_addr;
+	u32 val;
+
+	val = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
+	airoha_fe_wr(eth, REG_UPDMEM_DATA(0), val);
+	airoha_fe_wr(eth, REG_UPDMEM_CTRL(0),
+		     FIELD_PREP(PPE_UPDMEM_ADDR_MASK, port->id) |
+		     PPE_UPDMEM_WR_MASK | PPE_UPDMEM_REQ_MASK);
+
+	val = (addr[0] << 8) | addr[1];
+	airoha_fe_wr(eth, REG_UPDMEM_DATA(0), val);
+	airoha_fe_wr(eth, REG_UPDMEM_CTRL(0),
+		     FIELD_PREP(PPE_UPDMEM_ADDR_MASK, port->id) |
+		     FIELD_PREP(PPE_UPDMEM_OFFSET_MASK, 1) |
+		     PPE_UPDMEM_WR_MASK | PPE_UPDMEM_REQ_MASK);
+}
+
 int airoha_ppe_init(struct airoha_eth *eth)
 {
 	struct airoha_ppe *ppe;

drivers/net/ethernet/airoha/airoha_regs.h

@@ -313,6 +313,16 @@
 #define REG_PPE_RAM_BASE(_n)			(((_n) ? PPE2_BASE : PPE1_BASE) + 0x320)
 #define REG_PPE_RAM_ENTRY(_m, _n)		(REG_PPE_RAM_BASE(_m) + ((_n) << 2))
 
+#define REG_UPDMEM_CTRL(_n)			(((_n) ? PPE2_BASE : PPE1_BASE) + 0x370)
+#define PPE_UPDMEM_ACK_MASK			BIT(31)
+#define PPE_UPDMEM_ADDR_MASK			GENMASK(11, 8)
+#define PPE_UPDMEM_OFFSET_MASK			GENMASK(7, 4)
+#define PPE_UPDMEM_SEL_MASK			GENMASK(3, 2)
+#define PPE_UPDMEM_WR_MASK			BIT(1)
+#define PPE_UPDMEM_REQ_MASK			BIT(0)
+
+#define REG_UPDMEM_DATA(_n)			(((_n) ? PPE2_BASE : PPE1_BASE) + 0x374)
+
 #define REG_FE_GDM_TX_OK_PKT_CNT_H(_n)		(GDM_BASE(_n) + 0x280)
 #define REG_FE_GDM_TX_OK_BYTE_CNT_H(_n)		(GDM_BASE(_n) + 0x284)
 #define REG_FE_GDM_TX_ETH_PKT_CNT_H(_n)		(GDM_BASE(_n) + 0x288)