net: Use queue aware tests throughout.

This effectively "flips the switch" by making the core networking
and multiqueue-aware drivers use the new TX multiqueue structures.

Non-multiqueue drivers need no changes.  The interfaces they use such
as netif_stop_queue() degenerate into an operation on TX queue zero.
So everything "just works" for them.

Code that really wants to do "X" to all TX queues now invokes a
routine that does so, such as netif_tx_wake_all_queues(),
netif_tx_stop_all_queues(), etc.

pktgen and netpoll required a little bit more surgery than the others.

In particular the pktgen changes, whilst functional, could be largely
improved.  The initial check in pktgen_xmit() will sometimes check the
wrong queue, which is mostly harmless.  The thing to do is probably to
invoke fill_packet() earlier.

The bulk of the netpoll changes is to make the code operate solely on
the TX queue indicated by by the SKB queue mapping.

Setting of the SKB queue mapping is entirely confined inside of
net/core/dev.c:dev_pick_tx().  If we end up needing any kind of
special semantics (drops, for example) it will be implemented here.

Finally, we now have a "real_num_tx_queues" which is where the driver
indicates how many TX queues are actually active.

With IGB changes from Jeff Kirsher.

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

1 files changed, 8 insertions, 12 deletions

diff --git a/drivers/net/cpmac.c b/drivers/net/cpmac.c
index 7c7b54e4828e..fbd4280c102c 100644
--- a/drivers/net/cpmac.c
+++ b/drivers/net/cpmac.c
@@ -544,7 +544,7 @@ fatal_error:
 
         spin_unlock(&priv->rx_lock);
         netif_rx_complete(priv->dev, napi);
-        netif_stop_queue(priv->dev);
+        netif_tx_stop_all_queues(priv->dev);
         napi_disable(&priv->napi);
 
         atomic_inc(&priv->reset_pending);
@@ -750,9 +750,7 @@ static void cpmac_hw_error(struct work_struct *work)
         barrier();
         atomic_dec(&priv->reset_pending);
 
-        for (i = 0; i < CPMAC_QUEUES; i++)
-                netif_wake_subqueue(priv->dev, i);
-        netif_wake_queue(priv->dev);
+        netif_tx_wake_all_queues(priv->dev);
         cpmac_write(priv->regs, CPMAC_MAC_INT_ENABLE, 3);
 }
 
@@ -781,7 +779,7 @@ static void cpmac_check_status(struct net_device *dev)
                                      dev->name, tx_code, tx_channel, macstatus);
                 }
 
-                netif_stop_queue(dev);
+                netif_tx_stop_all_queues(dev);
                 cpmac_hw_stop(dev);
                 if (schedule_work(&priv->reset_work))
                         atomic_inc(&priv->reset_pending);
@@ -842,9 +840,7 @@ static void cpmac_tx_timeout(struct net_device *dev)
         barrier();
         atomic_dec(&priv->reset_pending);
 
-        netif_wake_queue(priv->dev);
-        for (i = 0; i < CPMAC_QUEUES; i++)
-                netif_wake_subqueue(dev, i);
+        netif_tx_wake_all_queues(priv->dev);
 }
 
 static int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
@@ -935,7 +931,7 @@ static void cpmac_adjust_link(struct net_device *dev)
 
         spin_lock(&priv->lock);
         if (priv->phy->link) {
-                netif_start_queue(dev);
+                netif_tx_start_all_queues(dev);
                 if (priv->phy->duplex != priv->oldduplex) {
                         new_state = 1;
                         priv->oldduplex = priv->phy->duplex;
@@ -949,10 +945,10 @@ static void cpmac_adjust_link(struct net_device *dev)
                 if (!priv->oldlink) {
                         new_state = 1;
                         priv->oldlink = 1;
-                        netif_schedule(dev);
+                        netif_tx_schedule_all(dev);
                 }
         } else if (priv->oldlink) {
-                netif_stop_queue(dev);
+                netif_tx_stop_all_queues(dev);
                 new_state = 1;
                 priv->oldlink = 0;
                 priv->oldspeed = 0;
@@ -1072,7 +1068,7 @@ static int cpmac_stop(struct net_device *dev)
         struct cpmac_priv *priv = netdev_priv(dev);
         struct resource *mem;
 
-        netif_stop_queue(dev);
+        netif_tx_stop_all_queues(dev);
 
         cancel_work_sync(&priv->reset_work);
         napi_disable(&priv->napi);