net: dsa: mv88e6xxx: add VTU Load/Purge operation

Add a new vtu_loadpurge operation to the chip info structure to differ
the various implementations of the VTU accesses.

Now that the STU handling is abstracted behind VTU operations, kill the
obsolete MV88E6XXX_FLAG_STU flag.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/global1_vtu.c

@@ -302,6 +302,72 @@ int mv88e6352_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
 	return 0;
 }
 
+int mv88e6185_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
+			       struct mv88e6xxx_vtu_entry *entry)
+{
+	u16 op = GLOBAL_VTU_OP_VTU_LOAD_PURGE;
+	int err;
+
+	err = mv88e6xxx_g1_vtu_op_wait(chip);
+	if (err)
+		return err;
+
+	err = mv88e6xxx_g1_vtu_vid_write(chip, entry);
+	if (err)
+		return err;
+
+	if (entry->valid) {
+		err = mv88e6185_g1_vtu_data_write(chip, entry);
+		if (err)
+			return err;
+
+		/* VTU DBNum[3:0] are located in VTU Operation 3:0
+		 * VTU DBNum[7:4] are located in VTU Operation 11:8
+		 */
+		op |= entry->fid & 0x000f;
+		op |= (entry->fid & 0x00f0) << 8;
+	}
+
+	return mv88e6xxx_g1_vtu_op(chip, op);
+}
+
+int mv88e6352_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
+			       struct mv88e6xxx_vtu_entry *entry)
+{
+	int err;
+
+	err = mv88e6xxx_g1_vtu_op_wait(chip);
+	if (err)
+		return err;
+
+	err = mv88e6xxx_g1_vtu_vid_write(chip, entry);
+	if (err)
+		return err;
+
+	if (entry->valid) {
+		/* Write MemberTag and PortState data */
+		err = mv88e6185_g1_vtu_data_write(chip, entry);
+		if (err)
+			return err;
+
+		err = mv88e6xxx_g1_vtu_sid_write(chip, entry);
+		if (err)
+			return err;
+
+		/* Load STU entry */
+		err = mv88e6xxx_g1_vtu_op(chip, GLOBAL_VTU_OP_STU_LOAD_PURGE);
+		if (err)
+			return err;
+
+		err = mv88e6xxx_g1_vtu_fid_write(chip, entry);
+		if (err)
+			return err;
+	}
+
+	/* Load/Purge VTU entry */
+	return mv88e6xxx_g1_vtu_op(chip, GLOBAL_VTU_OP_VTU_LOAD_PURGE);
+}
+
 int mv88e6xxx_g1_vtu_flush(struct mv88e6xxx_chip *chip)
 {
 	int err;