ixgbe: use known user priority for FCoE when DCB is enabled

Store the user priority for FCoE and use it directly for outgoing
FCoE traffic when DCB is enabled.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 28 insertions, 13 deletions

diff --git a/drivers/net/ixgbe/ixgbe_fcoe.c b/drivers/net/ixgbe/ixgbe_fcoe.c
index edecdc853c1..da32a108a7b 100644
--- a/drivers/net/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ixgbe/ixgbe_fcoe.c
@@ -499,6 +499,10 @@ void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
         struct ixgbe_hw *hw = &adapter->hw;
         struct ixgbe_fcoe *fcoe = &adapter->fcoe;
         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
+#ifdef CONFIG_IXGBE_DCB
+        u8 tc;
+        u32 up2tc;
+#endif
 
         /* create the pool for ddp if not created yet */
         if (!fcoe->pool) {
@@ -540,6 +544,17 @@ void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
                         IXGBE_FCRXCTRL_FCOELLI |
                         IXGBE_FCRXCTRL_FCCRCBO |
                         (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT));
+#ifdef CONFIG_IXGBE_DCB
+        up2tc = IXGBE_READ_REG(&adapter->hw, IXGBE_RTTUP2TC);
+        for (i = 0; i < MAX_USER_PRIORITY; i++) {
+                tc = (u8)(up2tc >> (i * IXGBE_RTTUP2TC_UP_SHIFT));
+                tc &= (MAX_TRAFFIC_CLASS - 1);
+                if (fcoe->tc == tc) {
+                        fcoe->up = i;
+                        break;
+                }
+        }
+#endif
 }
 
 /**
@@ -671,19 +686,7 @@ out_disable:
  */
 u8 ixgbe_fcoe_getapp(struct ixgbe_adapter *adapter)
 {
-        int i;
-        u8 tc;
-        u32 up2tc;
-
-        up2tc = IXGBE_READ_REG(&adapter->hw, IXGBE_RTTUP2TC);
-        for (i = 0; i < MAX_USER_PRIORITY; i++) {
-                tc = (u8)(up2tc >> (i * IXGBE_RTTUP2TC_UP_SHIFT));
-                tc &= (MAX_TRAFFIC_CLASS - 1);
-                if (adapter->fcoe.tc == tc)
-                        return 1 << i;
-        }
-
-        return 0;
+        return 1 << adapter->fcoe.up;
 }
 
 /**
@@ -710,6 +713,7 @@ u8 ixgbe_fcoe_setapp(struct ixgbe_adapter *adapter, u8 up)
                                 up2tc >>= (i * IXGBE_RTTUP2TC_UP_SHIFT);
                                 up2tc &= (MAX_TRAFFIC_CLASS - 1);
                                 adapter->fcoe.tc = (u8)up2tc;
+                                adapter->fcoe.up = i;
                                 return 0;
                         }
                 }
diff --git a/drivers/net/ixgbe/ixgbe_fcoe.h b/drivers/net/ixgbe/ixgbe_fcoe.h
index b5dee7b3ef1..de8ff53187d 100644
--- a/drivers/net/ixgbe/ixgbe_fcoe.h
+++ b/drivers/net/ixgbe/ixgbe_fcoe.h
@@ -62,7 +62,10 @@ struct ixgbe_fcoe_ddp {
 };
 
 struct ixgbe_fcoe {
+#ifdef CONFIG_IXGBE_DCB
         u8 tc;
+        u8 up;
+#endif
         spinlock_t lock;
         struct pci_pool *pool;
         struct ixgbe_fcoe_ddp ddp[IXGBE_FCOE_DDP_MAX];
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 9ba506f6ef2..09990ed105f 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -3958,8 +3958,10 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
                 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
                 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
                 adapter->ring_feature[RING_F_FCOE].indices = 0;
+#ifdef CONFIG_IXGBE_DCB
                 /* Default traffic class to use for FCoE */
                 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
+#endif
 #endif /* IXGBE_FCOE */
         }
 
@@ -5332,6 +5334,12 @@ static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
             (skb->protocol == htons(ETH_P_FCOE))) {
                 tx_flags |= IXGBE_TX_FLAGS_FCOE;
 #ifdef IXGBE_FCOE
+#ifdef CONFIG_IXGBE_DCB
+                tx_flags &= ~(IXGBE_TX_FLAGS_VLAN_PRIO_MASK
+                              << IXGBE_TX_FLAGS_VLAN_SHIFT);
+                tx_flags |= ((adapter->fcoe.up << 13)
+                              << IXGBE_TX_FLAGS_VLAN_SHIFT);
+#endif
                 r_idx = smp_processor_id();
                 r_idx &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
                 r_idx += adapter->ring_feature[RING_F_FCOE].mask;