ixgbe: cleanup configuration of EITRSEL and VF reset path

This change is meant to cleanup some of the code related to SR-IOV and the
interrupt registers.  Specifically I am moving the EITRSEL configuration
into the MSI-X configuration section instead of enablement.  Also I am
fixing the VF shutdown path since it had operations in the incorrect order.

Signed-off-by: Alexander Duyck <alexander.h.duyck@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 6378d7f..0ee7d09 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1516,6 +1516,12 @@ static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
 
        q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 
+       /* Populate MSIX to EITR Select */
+       if (adapter->num_vfs > 32) {
+               u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
+               IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
+       }
+
        /*
         * Populate the IVAR table and set the ITR values to the
         * corresponding register.
@@ -2130,11 +2136,6 @@ static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
                ixgbe_irq_enable_queues(adapter, ~0);
        if (flush)
                IXGBE_WRITE_FLUSH(&adapter->hw);
-
-       if (adapter->num_vfs > 32) {
-               u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
-               IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
-       }
 }
 
 /**
@@ -2313,8 +2314,6 @@ static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
                IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
-               if (adapter->num_vfs > 32)
-                       IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
                break;
        default:
                break;
@@ -3863,17 +3862,19 @@ void ixgbe_down(struct ixgbe_adapter *adapter)
 
        del_timer_sync(&adapter->service_timer);
 
-       /* disable receive for all VFs and wait one second */
        if (adapter->num_vfs) {
+               /* Clear EITR Select mapping */
+               IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
+
+               /* Mark all the VFs as inactive */
+               for (i = 0 ; i < adapter->num_vfs; i++)
+                       adapter->vfinfo[i].clear_to_send = 0;
+
                /* ping all the active vfs to let them know we are going down */
                ixgbe_ping_all_vfs(adapter);
 
                /* Disable all VFTE/VFRE TX/RX */
                ixgbe_disable_tx_rx(adapter);
-
-               /* Mark all the VFs as inactive */
-               for (i = 0 ; i < adapter->num_vfs; i++)
-                       adapter->vfinfo[i].clear_to_send = 0;
        }
 
        /* disable transmits in the hardware now that interrupts are off */