ixgbe: Update ixgbe driver to use __netdev_pick_tx in ixgbe_select_queue

This change updates the ixgbe driver to use __netdev_pick_tx instead of
the current logic it is using to select a queue.  The main result of this
change is that ixgbe can now fully support XPS, and in the case of non-FCoE
enabled configs it means we don't need to have our own ndo_select_queue.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Reviewed-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 16c9858..872d7aa 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -6374,38 +6374,40 @@ static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
        return __ixgbe_maybe_stop_tx(tx_ring, size);
 }
 
+#ifdef IXGBE_FCOE
 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
 {
-       struct ixgbe_adapter *adapter = netdev_priv(dev);
-       int txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
-                                              smp_processor_id();
-#ifdef IXGBE_FCOE
-       __be16 protocol = vlan_get_protocol(skb);
+       struct ixgbe_adapter *adapter;
+       struct ixgbe_ring_feature *f;
+       int txq;
 
-       if (((protocol == htons(ETH_P_FCOE)) ||
-           (protocol == htons(ETH_P_FIP))) &&
-           (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) {
-               struct ixgbe_ring_feature *f;
+       /*
+        * only execute the code below if protocol is FCoE
+        * or FIP and we have FCoE enabled on the adapter
+        */
+       switch (vlan_get_protocol(skb)) {
+       case __constant_htons(ETH_P_FCOE):
+       case __constant_htons(ETH_P_FIP):
+               adapter = netdev_priv(dev);
 
-               f = &adapter->ring_feature[RING_F_FCOE];
+               if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
+                       break;
+       default:
+               return __netdev_pick_tx(dev, skb);
+       }
 
-               while (txq >= f->indices)
-                       txq -= f->indices;
-               txq += adapter->ring_feature[RING_F_FCOE].offset;
+       f = &adapter->ring_feature[RING_F_FCOE];
 
-               return txq;
-       }
-#endif
+       txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
+                                          smp_processor_id();
 
-       if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
-               while (unlikely(txq >= dev->real_num_tx_queues))
-                       txq -= dev->real_num_tx_queues;
-               return txq;
-       }
+       while (txq >= f->indices)
+               txq -= f->indices;
 
-       return skb_tx_hash(dev, skb);
+       return txq + f->offset;
 }
 
+#endif
 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
                          struct ixgbe_adapter *adapter,
                          struct ixgbe_ring *tx_ring)
@@ -7129,7 +7131,9 @@ static const struct net_device_ops ixgbe_netdev_ops = {
        .ndo_open               = ixgbe_open,
        .ndo_stop               = ixgbe_close,
        .ndo_start_xmit         = ixgbe_xmit_frame,
+#ifdef IXGBE_FCOE
        .ndo_select_queue       = ixgbe_select_queue,
+#endif
        .ndo_set_rx_mode        = ixgbe_set_rx_mode,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_set_mac_address    = ixgbe_set_mac,