net: dsa: mv88e6xxx: flush VTU and STU entries
Implement the VTU Flush operation (which also flushes the STU), so that
warm boots won't preserved old entries.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index 9978245..175353a 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -1182,6 +1182,34 @@
return 0;
}
+static int _mv88e6xxx_vtu_wait(struct dsa_switch *ds)
+{
+ return _mv88e6xxx_wait(ds, REG_GLOBAL, GLOBAL_VTU_OP,
+ GLOBAL_VTU_OP_BUSY);
+}
+
+static int _mv88e6xxx_vtu_cmd(struct dsa_switch *ds, u16 op)
+{
+ int ret;
+
+ ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_VTU_OP, op);
+ if (ret < 0)
+ return ret;
+
+ return _mv88e6xxx_vtu_wait(ds);
+}
+
+static int _mv88e6xxx_vtu_stu_flush(struct dsa_switch *ds)
+{
+ int ret;
+
+ ret = _mv88e6xxx_vtu_wait(ds);
+ if (ret < 0)
+ return ret;
+
+ return _mv88e6xxx_vtu_cmd(ds, GLOBAL_VTU_OP_FLUSH_ALL);
+}
+
static int _mv88e6xxx_atu_mac_write(struct dsa_switch *ds,
const unsigned char *addr)
{
@@ -2071,6 +2099,12 @@
/* Wait for the flush to complete. */
mutex_lock(&ps->smi_mutex);
ret = _mv88e6xxx_stats_wait(ds);
+ if (ret < 0)
+ goto unlock;
+
+ /* Clear all the VTU and STU entries */
+ ret = _mv88e6xxx_vtu_stu_flush(ds);
+unlock:
mutex_unlock(&ps->smi_mutex);
return ret;