ixgbe: Fix coexistence of FCoE and Flow Director in 82599

Fix coexistence of Fiber Channel over Ethernet (FCoE) and Flow Director (FDIR)
in 82599 and remove the disabling of FDIR when FCoE is enabled.

Currently, FDIR is turned off when FCoE is enabled under the assumption that
FCoE is always enabled with DCB being turned on. However, FDIR does not have
to be turned off all the time when FCoE is enabled since FCoE can be enabled
without DCB being turned on, e.g., use link pause only. This patch makes sure
that when DCB is turned on or off, FDIR is turned on or off correspondingly;
and when FCoE is enabled, it does not disable FDIR, rather, it will have FDIR
set up properly so FCoE and FDIR can coexist regardless of DCB being on or off.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ixgbe/ixgbe_dcb_nl.c b/drivers/net/ixgbe/ixgbe_dcb_nl.c
index d56890f5c9d53f736c1ba58c5c1d73f5e2c131d2..7c5978ad929adc43424b4c1b475c2ef54c25ded9 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_dcb_nl.c
+++ b/drivers/net/ixgbe/ixgbe_dcb_nl.c
@@ -138,6 +138,10 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
                        adapter->hw.fc.requested_mode = ixgbe_fc_none;
                }
                adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
+               if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
+                       adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
+                       adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
+               }
                adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
                ixgbe_init_interrupt_scheme(adapter);
                if (netif_running(netdev))
@@ -154,6 +158,8 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
                        adapter->dcb_cfg.pfc_mode_enable = false;
                        adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
                        adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
+                       if (adapter->hw.mac.type == ixgbe_mac_82599EB)
+                               adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
                        ixgbe_init_interrupt_scheme(adapter);
                        if (netif_running(netdev))
                                netdev->netdev_ops->ndo_open(netdev);

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index a3061aacffd841f3eb27ef3092740e27906219b5..e3442f47f932a6ceb7d3f70cf84f51907be8bb8e 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -3130,7 +3130,11 @@ static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
 #endif
                if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
                        DPRINTK(PROBE, INFO, "FCOE enabled with RSS \n");
-                       ixgbe_set_rss_queues(adapter);
+                       if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
+                           (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
+                               ixgbe_set_fdir_queues(adapter);
+                       else
+                               ixgbe_set_rss_queues(adapter);
                }
                /* adding FCoE rx rings to the end */
                f->mask = adapter->num_rx_queues;
@@ -3388,7 +3392,12 @@ static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
                }
 #endif /* CONFIG_IXGBE_DCB */
                if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
-                       ixgbe_cache_ring_rss(adapter);
+                       if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
+                           (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
+                               ixgbe_cache_ring_fdir(adapter);
+                       else
+                               ixgbe_cache_ring_rss(adapter);
+
                        fcoe_i = f->mask;
                }
                for (i = 0; i < f->indices; i++, fcoe_i++)
@@ -5578,12 +5587,6 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
                                netdev->features |= NETIF_F_FCOE_CRC;
                                netdev->features |= NETIF_F_FSO;
                                netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
-                               DPRINTK(DRV, INFO, "FCoE enabled, "
-                                       "disabling Flow Director\n");
-                               adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
-                               adapter->flags &=
-                                       ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
-                               adapter->atr_sample_rate = 0;
                        } else {
                                adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
                        }