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>

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);

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);