[PATCH net-next v2] net: bcmgenet: add BQL support

[Petri Gynther]

Add Byte Queue Limits (BQL) support to bcmgenet driver.

Signed-off-by: Petri Gynther <pgynt...@google.com>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c 
b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index f7b42b9..c286ae8 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1221,8 +1221,10 @@ static unsigned int __bcmgenet_tx_reclaim(struct 
net_device *dev,
        dev->stats.tx_packets += pkts_compl;
        dev->stats.tx_bytes += bytes_compl;
 
+       txq = netdev_get_tx_queue(dev, ring->queue);
+       netdev_tx_completed_queue(txq, pkts_compl, bytes_compl);
+
        if (ring->free_bds > (MAX_SKB_FRAGS + 1)) {
-               txq = netdev_get_tx_queue(dev, ring->queue);
                if (netif_tx_queue_stopped(txq))
                        netif_tx_wake_queue(txq);
        }
@@ -1516,6 +1518,8 @@ static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, 
struct net_device *dev)
        ring->prod_index += nr_frags + 1;
        ring->prod_index &= DMA_P_INDEX_MASK;
 
+       netdev_tx_sent_queue(txq, GENET_CB(skb)->bytes_sent);
+
        if (ring->free_bds <= (MAX_SKB_FRAGS + 1))
                netif_tx_stop_queue(txq);
 
@@ -2364,6 +2368,7 @@ static int bcmgenet_dma_teardown(struct bcmgenet_priv 
*priv)
 static void bcmgenet_fini_dma(struct bcmgenet_priv *priv)
 {
        int i;
+       struct netdev_queue *txq;
 
        bcmgenet_fini_rx_napi(priv);
        bcmgenet_fini_tx_napi(priv);
@@ -2378,6 +2383,14 @@ static void bcmgenet_fini_dma(struct bcmgenet_priv *priv)
                }
        }
 
+       for (i = 0; i < priv->hw_params->tx_queues; i++) {
+               txq = netdev_get_tx_queue(priv->dev, priv->tx_rings[i].queue);
+               netdev_tx_reset_queue(txq);
+       }
+
+       txq = netdev_get_tx_queue(priv->dev, priv->tx_rings[DESC_INDEX].queue);
+       netdev_tx_reset_queue(txq);
+
        bcmgenet_free_rx_buffers(priv);
        kfree(priv->rx_cbs);
        kfree(priv->tx_cbs);
-- 
2.8.0.rc3.226.g39d4020