mlxsw: reg: Add Switch FDB Notification register definition

Add SFN register which is used to poll for newly added and aged-out FDB
entries.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/reg.h

@@ -371,6 +371,105 @@ mlxsw_reg_sfd_uc_unpack(char *payload, int rec_index,
 	*p_local_port = mlxsw_reg_sfd_uc_system_port_get(payload, rec_index);
 }
 
+/* SFN - Switch FDB Notification Register
+ * -------------------------------------------
+ * The switch provides notifications on newly learned FDB entries and
+ * aged out entries. The notifications can be polled by software.
+ */
+#define MLXSW_REG_SFN_ID 0x200B
+#define MLXSW_REG_SFN_BASE_LEN 0x10 /* base length, without records */
+#define MLXSW_REG_SFN_REC_LEN 0x10 /* record length */
+#define MLXSW_REG_SFN_REC_MAX_COUNT 64
+#define MLXSW_REG_SFN_LEN (MLXSW_REG_SFN_BASE_LEN +	\
+			   MLXSW_REG_SFN_REC_LEN * MLXSW_REG_SFN_REC_MAX_COUNT)
+
+static const struct mlxsw_reg_info mlxsw_reg_sfn = {
+	.id = MLXSW_REG_SFN_ID,
+	.len = MLXSW_REG_SFN_LEN,
+};
+
+/* reg_sfn_swid
+ * Switch partition ID.
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, sfn, swid, 0x00, 24, 8);
+
+/* reg_sfn_num_rec
+ * Request: Number of learned notifications and aged-out notification
+ * records requested.
+ * Response: Number of notification records returned (must be smaller
+ * than or equal to the value requested)
+ * Ranges 0..64
+ * Access: OP
+ */
+MLXSW_ITEM32(reg, sfn, num_rec, 0x04, 0, 8);
+
+static inline void mlxsw_reg_sfn_pack(char *payload)
+{
+	MLXSW_REG_ZERO(sfn, payload);
+	mlxsw_reg_sfn_swid_set(payload, 0);
+	mlxsw_reg_sfn_num_rec_set(payload, MLXSW_REG_SFN_REC_MAX_COUNT);
+}
+
+/* reg_sfn_rec_swid
+ * Switch partition ID.
+ * Access: RO
+ */
+MLXSW_ITEM32_INDEXED(reg, sfn, rec_swid, MLXSW_REG_SFN_BASE_LEN, 24, 8,
+		     MLXSW_REG_SFN_REC_LEN, 0x00, false);
+
+enum mlxsw_reg_sfn_rec_type {
+	/* MAC addresses learned on a regular port. */
+	MLXSW_REG_SFN_REC_TYPE_LEARNED_MAC = 0x5,
+	/* Aged-out MAC address on a regular port */
+	MLXSW_REG_SFN_REC_TYPE_AGED_OUT_MAC = 0x7,
+};
+
+/* reg_sfn_rec_type
+ * Notification record type.
+ * Access: RO
+ */
+MLXSW_ITEM32_INDEXED(reg, sfn, rec_type, MLXSW_REG_SFN_BASE_LEN, 20, 4,
+		     MLXSW_REG_SFN_REC_LEN, 0x00, false);
+
+/* reg_sfn_rec_mac
+ * MAC address.
+ * Access: RO
+ */
+MLXSW_ITEM_BUF_INDEXED(reg, sfn, rec_mac, MLXSW_REG_SFN_BASE_LEN, 6,
+		       MLXSW_REG_SFN_REC_LEN, 0x02);
+
+/* reg_sfd_mac_sub_port
+ * VEPA channel on the local port.
+ * 0 if multichannel VEPA is not enabled.
+ * Access: RO
+ */
+MLXSW_ITEM32_INDEXED(reg, sfn, mac_sub_port, MLXSW_REG_SFN_BASE_LEN, 16, 8,
+		     MLXSW_REG_SFN_REC_LEN, 0x08, false);
+
+/* reg_sfd_mac_fid
+ * Filtering identifier.
+ * Access: RO
+ */
+MLXSW_ITEM32_INDEXED(reg, sfn, mac_fid, MLXSW_REG_SFN_BASE_LEN, 0, 16,
+		     MLXSW_REG_SFN_REC_LEN, 0x08, false);
+
+/* reg_sfd_mac_system_port
+ * Unique port identifier for the final destination of the packet.
+ * Access: RO
+ */
+MLXSW_ITEM32_INDEXED(reg, sfn, mac_system_port, MLXSW_REG_SFN_BASE_LEN, 0, 16,
+		     MLXSW_REG_SFN_REC_LEN, 0x0C, false);
+
+static inline void mlxsw_reg_sfn_mac_unpack(char *payload, int rec_index,
+					    char *mac, u16 *p_vid,
+					    u8 *p_local_port)
+{
+	mlxsw_reg_sfn_rec_mac_memcpy_from(payload, rec_index, mac);
+	*p_vid = mlxsw_reg_sfn_mac_fid_get(payload, rec_index);
+	*p_local_port = mlxsw_reg_sfn_mac_system_port_get(payload, rec_index);
+}
+
 /* SPMS - Switch Port MSTP/RSTP State Register
  * -------------------------------------------
  * Configures the spanning tree state of a physical port.
@@ -1467,6 +1566,8 @@ static inline const char *mlxsw_reg_id_str(u16 reg_id)
 		return "SSPR";
 	case MLXSW_REG_SFD_ID:
 		return "SFD";
+	case MLXSW_REG_SFN_ID:
+		return "SFN";
 	case MLXSW_REG_SPMS_ID:
 		return "SPMS";
 	case MLXSW_REG_SFGC_ID: