ixgb: add NETIF_F_LLTX analogous to e1000
add NETIF_F_LLTX code like e1000 has
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index 13181c4..466cbe2 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -449,6 +449,9 @@
#ifdef NETIF_F_TSO
netdev->features |= NETIF_F_TSO;
#endif
+#ifdef NETIF_F_LLTX
+ netdev->features |= NETIF_F_LLTX;
+#endif
if(pci_using_dac)
netdev->features |= NETIF_F_HIGHDMA;
@@ -1408,13 +1411,26 @@
return 0;
}
+#ifdef NETIF_F_LLTX
+ local_irq_save(flags);
+ if (!spin_trylock(&adapter->tx_lock)) {
+ /* Collision - tell upper layer to requeue */
+ local_irq_restore(flags);
+ return NETDEV_TX_LOCKED;
+ }
+#else
spin_lock_irqsave(&adapter->tx_lock, flags);
+#endif
+
if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) {
netif_stop_queue(netdev);
spin_unlock_irqrestore(&adapter->tx_lock, flags);
- return 1;
+ return NETDEV_TX_BUSY;
}
+
+#ifndef NETIF_F_LLTX
spin_unlock_irqrestore(&adapter->tx_lock, flags);
+#endif
if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
tx_flags |= IXGB_TX_FLAGS_VLAN;
@@ -1426,6 +1442,9 @@
tso = ixgb_tso(adapter, skb);
if (tso < 0) {
dev_kfree_skb_any(skb);
+#ifdef NETIF_F_LLTX
+ spin_unlock_irqrestore(&adapter->tx_lock, flags);
+#endif
return NETDEV_TX_OK;
}
@@ -1439,7 +1458,15 @@
netdev->trans_start = jiffies;
- return 0;
+#ifdef NETIF_F_LLTX
+ /* Make sure there is space in the ring for the next send. */
+ if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED))
+ netif_stop_queue(netdev);
+
+ spin_unlock_irqrestore(&adapter->tx_lock, flags);
+
+#endif
+ return NETDEV_TX_OK;
}
/**