igb: setup vlan tag replication stripping in igb_vmm_control

This update adds vlan tag stripping for inter-vf communications to the
igb_vmm_control configuration function.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 20 insertions, 0 deletions

diff --git a/drivers/net/igb/e1000_82575.h b/drivers/net/igb/e1000_82575.h
index 7be3a0b6a057..9418683ed006 100644
--- a/drivers/net/igb/e1000_82575.h
+++ b/drivers/net/igb/e1000_82575.h
@@ -203,6 +203,15 @@ struct e1000_adv_tx_context_desc {
 #define E1000_IOVCTL 0x05BBC
 #define E1000_IOVCTL_REUSE_VFQ 0x00000001
 
+#define E1000_RPLOLR_STRVLAN   0x40000000
+#define E1000_RPLOLR_STRCRC    0x80000000
+
+#define E1000_DTXCTL_8023LL     0x0004
+#define E1000_DTXCTL_VLAN_ADDED 0x0008
+#define E1000_DTXCTL_OOS_ENABLE 0x0010
+#define E1000_DTXCTL_MDP_EN     0x0020
+#define E1000_DTXCTL_SPOOF_INT  0x0040
+
 #define ALL_QUEUES   0xFFFF
 
 void igb_vmdq_set_loopback_pf(struct e1000_hw *, bool);
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 24a119ec005d..9dd290cf754a 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -5799,11 +5799,22 @@ static int igb_set_vf_mac(struct igb_adapter *adapter,
 static void igb_vmm_control(struct igb_adapter *adapter)
 {
         struct e1000_hw *hw = &adapter->hw;
+        u32 reg;
 
         /* replication is not supported for 82575 */
         if (hw->mac.type == e1000_82575)
                 return;
 
+        /* enable replication vlan tag stripping */
+        reg = rd32(E1000_RPLOLR);
+        reg |= E1000_RPLOLR_STRVLAN;
+        wr32(E1000_RPLOLR, reg);
+
+        /* notify HW that the MAC is adding vlan tags */
+        reg = rd32(E1000_DTXCTL);
+        reg |= E1000_DTXCTL_VLAN_ADDED;
+        wr32(E1000_DTXCTL, reg);
+
         if (adapter->vfs_allocated_count) {
                 igb_vmdq_set_loopback_pf(hw, true);
                 igb_vmdq_set_replication_pf(hw, true);