Merge branch 'net-stmmac-improve-WOL'

Jisheng Zhang says:

====================
net: stmmac: improve WOL

Currently, stmmac driver relies on the HW PMT to support WOL. We want
to support phy based WOL.

patch1 is a small improvement to disable WAKE_MAGIC for PMT case if
no pmt_magic_frame.
patch2 and patch3 are two prepation patches.
patch4 implement the phy based WOL
patch5 tries to save a bit energy if WOL is enabled.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 3 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 73677c3b33b6..89b2b3472852 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1075,6 +1075,7 @@ static void stmmac_check_pcs_mode(struct stmmac_priv *priv)
  */
 static int stmmac_init_phy(struct net_device *dev)
 {
+	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
 	struct stmmac_priv *priv = netdev_priv(dev);
 	struct device_node *node;
 	int ret;
@@ -1100,6 +1101,9 @@ static int stmmac_init_phy(struct net_device *dev)
 		ret = phylink_connect_phy(priv->phylink, phydev);
 	}
 
+	phylink_ethtool_get_wol(priv->phylink, &wol);
+	device_set_wakeup_capable(priv->device, !!wol.supported);
+
 	return ret;
 }
 
@@ -2819,6 +2823,8 @@ static int stmmac_open(struct net_device *dev)
 	stmmac_init_coalesce(priv);
 
 	phylink_start(priv->phylink);
+	/* We may have called phylink_speed_down before */
+	phylink_speed_up(priv->phylink);
 
 	/* Request the IRQ lines */
 	ret = request_irq(dev->irq, stmmac_interrupt,
@@ -2892,6 +2898,8 @@ static int stmmac_release(struct net_device *dev)
 	if (priv->eee_enabled)
 		del_timer_sync(&priv->eee_ctrl_timer);
 
+	if (device_may_wakeup(priv->device))
+		phylink_speed_down(priv->phylink, false);
 	/* Stop and disconnect the PHY */
 	phylink_stop(priv->phylink);
 	phylink_disconnect_phy(priv->phylink);
@@ -5085,12 +5093,14 @@ int stmmac_suspend(struct device *dev)
 		priv->plat->serdes_powerdown(ndev, priv->plat->bsp_priv);
 
 	/* Enable Power down mode by programming the PMT regs */
-	if (device_may_wakeup(priv->device)) {
+	if (device_may_wakeup(priv->device) && priv->plat->pmt) {
 		stmmac_pmt(priv, priv->hw, priv->wolopts);
 		priv->irq_wake = 1;
 	} else {
 		mutex_unlock(&priv->lock);
 		rtnl_lock();
+		if (device_may_wakeup(priv->device))
+			phylink_speed_down(priv->phylink, false);
 		phylink_stop(priv->phylink);
 		rtnl_unlock();
 		mutex_lock(&priv->lock);
@@ -5157,7 +5167,7 @@ int stmmac_resume(struct device *dev)
 	 * this bit because it can generate problems while resuming
 	 * from another devices (e.g. serial console).
 	 */
-	if (device_may_wakeup(priv->device)) {
+	if (device_may_wakeup(priv->device) && priv->plat->pmt) {
 		mutex_lock(&priv->lock);
 		stmmac_pmt(priv, priv->hw, 0);
 		mutex_unlock(&priv->lock);
@@ -5200,9 +5210,11 @@ int stmmac_resume(struct device *dev)
 
 	mutex_unlock(&priv->lock);
 
-	if (!device_may_wakeup(priv->device)) {
+	if (!device_may_wakeup(priv->device) || !priv->plat->pmt) {
 		rtnl_lock();
 		phylink_start(priv->phylink);
+		/* We may have called phylink_speed_down before */
+		phylink_speed_up(priv->phylink);
 		rtnl_unlock();
 	}