1 files changed, 42 insertions, 12 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c33db79cdd0a..5b1c12ff98c0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -111,7 +111,7 @@ static void stmmac_init_fs(struct net_device *dev);
 static void stmmac_exit_fs(struct net_device *dev);
 #endif
 
-#define STMMAC_COAL_TIMER(x) (jiffies + usecs_to_jiffies(x))
+#define STMMAC_COAL_TIMER(x) (ns_to_ktime((x) * NSEC_PER_USEC))
 
 /**
  * stmmac_verify_args - verify the driver parameters.
@@ -294,6 +294,16 @@ static inline u32 stmmac_rx_dirty(struct stmmac_priv *priv, u32 queue)
 	return dirty;
 }
 
+static void stmmac_lpi_entry_timer_config(struct stmmac_priv *priv, bool en)
+{
+	int tx_lpi_timer;
+
+	/* Clear/set the SW EEE timer flag based on LPI ET enablement */
+	priv->eee_sw_timer_en = en ? 0 : 1;
+	tx_lpi_timer  = en ? priv->tx_lpi_timer : 0;
+	stmmac_set_eee_lpi_timer(priv, priv->hw, tx_lpi_timer);
+}
+
 /**
  * stmmac_enable_eee_mode - check and enter in LPI mode
  * @priv: driver private structure
@@ -327,6 +337,11 @@ static void stmmac_enable_eee_mode(struct stmmac_priv *priv)
  */
 void stmmac_disable_eee_mode(struct stmmac_priv *priv)
 {
+	if (!priv->eee_sw_timer_en) {
+		stmmac_lpi_entry_timer_config(priv, 0);
+		return;
+	}
+
 	stmmac_reset_eee_mode(priv, priv->hw);
 	del_timer_sync(&priv->eee_ctrl_timer);
 	priv->tx_path_in_lpi_mode = false;
@@ -376,6 +391,7 @@ bool stmmac_eee_init(struct stmmac_priv *priv)
 	if (!priv->eee_active) {
 		if (priv->eee_enabled) {
 			netdev_dbg(priv->dev, "disable EEE\n");
+			stmmac_lpi_entry_timer_config(priv, 0);
 			del_timer_sync(&priv->eee_ctrl_timer);
 			stmmac_set_eee_timer(priv, priv->hw, 0, eee_tw_timer);
 		}
@@ -389,7 +405,15 @@ bool stmmac_eee_init(struct stmmac_priv *priv)
 				     eee_tw_timer);
 	}
 
-	mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(priv->tx_lpi_timer));
+	if (priv->plat->has_gmac4 && priv->tx_lpi_timer <= STMMAC_ET_MAX) {
+		del_timer_sync(&priv->eee_ctrl_timer);
+		priv->tx_path_in_lpi_mode = false;
+		stmmac_lpi_entry_timer_config(priv, 1);
+	} else {
+		stmmac_lpi_entry_timer_config(priv, 0);
+		mod_timer(&priv->eee_ctrl_timer,
+			  STMMAC_LPI_T(priv->tx_lpi_timer));
+	}
 
 	mutex_unlock(&priv->lock);
 	netdev_dbg(priv->dev, "Energy-Efficient Ethernet initialized\n");
@@ -2057,14 +2081,16 @@ static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue)
 		netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, queue));
 	}
 
-	if ((priv->eee_enabled) && (!priv->tx_path_in_lpi_mode)) {
+	if (priv->eee_enabled && !priv->tx_path_in_lpi_mode &&
+	    priv->eee_sw_timer_en) {
 		stmmac_enable_eee_mode(priv);
 		mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(priv->tx_lpi_timer));
 	}
 
 	/* We still have pending packets, let's call for a new scheduling */
 	if (tx_q->dirty_tx != tx_q->cur_tx)
-		mod_timer(&tx_q->txtimer, STMMAC_COAL_TIMER(priv->tx_coal_timer));
+		hrtimer_start(&tx_q->txtimer, STMMAC_COAL_TIMER(priv->tx_coal_timer),
+			      HRTIMER_MODE_REL);
 
 	__netif_tx_unlock_bh(netdev_get_tx_queue(priv->dev, queue));
 
@@ -2348,7 +2374,8 @@ static void stmmac_tx_timer_arm(struct stmmac_priv *priv, u32 queue)
 {
 	struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
 
-	mod_timer(&tx_q->txtimer, STMMAC_COAL_TIMER(priv->tx_coal_timer));
+	hrtimer_start(&tx_q->txtimer, STMMAC_COAL_TIMER(priv->tx_coal_timer),
+		      HRTIMER_MODE_REL);
 }
 
 /**
@@ -2357,9 +2384,9 @@ static void stmmac_tx_timer_arm(struct stmmac_priv *priv, u32 queue)
  * Description:
  * This is the timer handler to directly invoke the stmmac_tx_clean.
  */
-static void stmmac_tx_timer(struct timer_list *t)
+static enum hrtimer_restart stmmac_tx_timer(struct hrtimer *t)
 {
-	struct stmmac_tx_queue *tx_q = from_timer(tx_q, t, txtimer);
+	struct stmmac_tx_queue *tx_q = container_of(t, struct stmmac_tx_queue, txtimer);
 	struct stmmac_priv *priv = tx_q->priv_data;
 	struct stmmac_channel *ch;
 
@@ -2373,6 +2400,8 @@ static void stmmac_tx_timer(struct timer_list *t)
 		spin_unlock_irqrestore(&ch->lock, flags);
 		__napi_schedule(&ch->tx_napi);
 	}
+
+	return HRTIMER_NORESTART;
 }
 
 /**
@@ -2395,7 +2424,8 @@ static void stmmac_init_coalesce(struct stmmac_priv *priv)
 	for (chan = 0; chan < tx_channel_count; chan++) {
 		struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan];
 
-		timer_setup(&tx_q->txtimer, stmmac_tx_timer, 0);
+		hrtimer_init(&tx_q->txtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+		tx_q->txtimer.function = stmmac_tx_timer;
 	}
 }
 
@@ -2887,7 +2917,7 @@ irq_error:
 	phylink_stop(priv->phylink);
 
 	for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++)
-		del_timer_sync(&priv->tx_queue[chan].txtimer);
+		hrtimer_cancel(&priv->tx_queue[chan].txtimer);
 
 	stmmac_hw_teardown(dev);
 init_error:
@@ -2917,7 +2947,7 @@ static int stmmac_release(struct net_device *dev)
 	stmmac_disable_all_queues(priv);
 
 	for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++)
-		del_timer_sync(&priv->tx_queue[chan].txtimer);
+		hrtimer_cancel(&priv->tx_queue[chan].txtimer);
 
 	/* Free the IRQ lines */
 	free_irq(dev->irq, dev);
@@ -3321,7 +3351,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
 	tx_q = &priv->tx_queue[queue];
 	first_tx = tx_q->cur_tx;
 
-	if (priv->tx_path_in_lpi_mode)
+	if (priv->tx_path_in_lpi_mode && priv->eee_sw_timer_en)
 		stmmac_disable_eee_mode(priv);
 
 	/* Manage oversized TCP frames for GMAC4 device */
@@ -5163,7 +5193,7 @@ int stmmac_suspend(struct device *dev)
 	stmmac_disable_all_queues(priv);
 
 	for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++)
-		del_timer_sync(&priv->tx_queue[chan].txtimer);
+		hrtimer_cancel(&priv->tx_queue[chan].txtimer);
 
 	if (priv->eee_enabled) {
 		priv->tx_path_in_lpi_mode = false;