5 files changed, 87 insertions, 0 deletions

diff --git a/drivers/net/igb/e1000_82575.c b/drivers/net/igb/e1000_82575.c
index 50f6e9649845..0a2368fa6bc6 100644
--- a/drivers/net/igb/e1000_82575.c
+++ b/drivers/net/igb/e1000_82575.c
@@ -1480,6 +1480,39 @@ out:
 }
 
 /**
+ *  igb_vmdq_set_anti_spoofing_pf - enable or disable anti-spoofing
+ *  @hw: pointer to the hardware struct
+ *  @enable: state to enter, either enabled or disabled
+ *  @pf: Physical Function pool - do not set anti-spoofing for the PF
+ *
+ *  enables/disables L2 switch anti-spoofing functionality.
+ **/
+void igb_vmdq_set_anti_spoofing_pf(struct e1000_hw *hw, bool enable, int pf)
+{
+	u32 dtxswc;
+
+	switch (hw->mac.type) {
+	case e1000_82576:
+	case e1000_i350:
+		dtxswc = rd32(E1000_DTXSWC);
+		if (enable) {
+			dtxswc |= (E1000_DTXSWC_MAC_SPOOF_MASK |
+				   E1000_DTXSWC_VLAN_SPOOF_MASK);
+			/* The PF can spoof - it has to in order to
+			 * support emulation mode NICs */
+			dtxswc ^= (1 << pf | 1 << (pf + MAX_NUM_VFS));
+		} else {
+			dtxswc &= ~(E1000_DTXSWC_MAC_SPOOF_MASK |
+				    E1000_DTXSWC_VLAN_SPOOF_MASK);
+		}
+		wr32(E1000_DTXSWC, dtxswc);
+		break;
+	default:
+		break;
+	}
+}
+
+/**
  *  igb_vmdq_set_loopback_pf - enable or disable vmdq loopback
  *  @hw: pointer to the hardware struct
  *  @enable: state to enter, either enabled or disabled
diff --git a/drivers/net/igb/e1000_82575.h b/drivers/net/igb/e1000_82575.h
index cbd1e1259e4d..1d01af2472e7 100644
--- a/drivers/net/igb/e1000_82575.h
+++ b/drivers/net/igb/e1000_82575.h
@@ -194,6 +194,10 @@ struct e1000_adv_tx_context_desc {
 #define E1000_NVM_APME_82575          0x0400
 #define MAX_NUM_VFS                   8
 
+#define E1000_DTXSWC_MAC_SPOOF_MASK   0x000000FF /* Per VF MAC spoof control */
+#define E1000_DTXSWC_VLAN_SPOOF_MASK  0x0000FF00 /* Per VF VLAN spoof control */
+#define E1000_DTXSWC_LLE_MASK         0x00FF0000 /* Per VF Local LB enables */
+#define E1000_DTXSWC_VLAN_SPOOF_SHIFT 8
 #define E1000_DTXSWC_VMDQ_LOOPBACK_EN (1 << 31)  /* global VF LB enable */
 
 /* Easy defines for setting default pool, would normally be left a zero */
@@ -243,6 +247,7 @@ struct e1000_adv_tx_context_desc {
 
 /* RX packet buffer size defines */
 #define E1000_RXPBS_SIZE_MASK_82576  0x0000007F
+void igb_vmdq_set_anti_spoofing_pf(struct e1000_hw *, bool, int);
 void igb_vmdq_set_loopback_pf(struct e1000_hw *, bool);
 void igb_vmdq_set_replication_pf(struct e1000_hw *, bool);
 u16 igb_rxpbs_adjust_82580(u32 data);
diff --git a/drivers/net/igb/e1000_regs.h b/drivers/net/igb/e1000_regs.h
index abb7333a1fbf..8ac83c5190d5 100644
--- a/drivers/net/igb/e1000_regs.h
+++ b/drivers/net/igb/e1000_regs.h
@@ -301,6 +301,7 @@
 #define E1000_VFTE      0x00C90 /* VF Transmit Enables */
 #define E1000_QDE       0x02408 /* Queue Drop Enable - RW */
 #define E1000_DTXSWC    0x03500 /* DMA Tx Switch Control - RW */
+#define E1000_WVBR      0x03554 /* VM Wrong Behavior - RWS */
 #define E1000_RPLOLR    0x05AF0 /* Replication Offload - RW */
 #define E1000_UTA       0x0A000 /* Unicast Table Array - RW */
 #define E1000_IOVTCL    0x05BBC /* IOV Control Register */
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index edab9c442399..92a4ef09e55c 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -324,6 +324,7 @@ struct igb_adapter {
 	unsigned int vfs_allocated_count;
 	struct vf_data_storage *vf_data;
 	u32 rss_queues;
+	u32 wvbr;
 };
 
 #define IGB_FLAG_HAS_MSI           (1 << 0)
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index a364ae69ab37..58c665b7513d 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -3366,6 +3366,45 @@ static void igb_set_rx_mode(struct net_device *netdev)
 	igb_restore_vf_multicasts(adapter);
 }
 
+static void igb_check_wvbr(struct igb_adapter *adapter)
+{
+	struct e1000_hw *hw = &adapter->hw;
+	u32 wvbr = 0;
+
+	switch (hw->mac.type) {
+	case e1000_82576:
+	case e1000_i350:
+		if (!(wvbr = rd32(E1000_WVBR)))
+			return;
+		break;
+	default:
+		break;
+	}
+
+	adapter->wvbr |= wvbr;
+}
+
+#define IGB_STAGGERED_QUEUE_OFFSET 8
+
+static void igb_spoof_check(struct igb_adapter *adapter)
+{
+	int j;
+
+	if (!adapter->wvbr)
+		return;
+
+	for(j = 0; j < adapter->vfs_allocated_count; j++) {
+		if (adapter->wvbr & (1 << j) ||
+		    adapter->wvbr & (1 << (j + IGB_STAGGERED_QUEUE_OFFSET))) {
+			dev_warn(&adapter->pdev->dev,
+				"Spoof event(s) detected on VF %d\n", j);
+			adapter->wvbr &=
+				~((1 << j) |
+				  (1 << (j + IGB_STAGGERED_QUEUE_OFFSET)));
+		}
+	}
+}
+
 /* Need to wait a few seconds after link up to get diagnostic information from
  * the phy */
 static void igb_update_phy_info(unsigned long data)
@@ -3525,6 +3564,8 @@ static void igb_watchdog_task(struct work_struct *work)
 		wr32(E1000_ICS, E1000_ICS_RXDMT0);
 	}
 
+	igb_spoof_check(adapter);
+
 	/* Reset the timer */
 	if (!test_bit(__IGB_DOWN, &adapter->state))
 		mod_timer(&adapter->watchdog_timer,
@@ -4521,6 +4562,10 @@ static irqreturn_t igb_msix_other(int irq, void *data)
 	if (icr & E1000_ICR_DOUTSYNC) {
 		/* HW is reporting DMA is out of sync */
 		adapter->stats.doosync++;
+		/* The DMA Out of Sync is also indication of a spoof event
+		 * in IOV mode. Check the Wrong VM Behavior register to
+		 * see if it is really a spoof event. */
+		igb_check_wvbr(adapter);
 	}
 
 	/* Check for a mailbox event */
@@ -6595,6 +6640,8 @@ static void igb_vmm_control(struct igb_adapter *adapter)
 	if (adapter->vfs_allocated_count) {
 		igb_vmdq_set_loopback_pf(hw, true);
 		igb_vmdq_set_replication_pf(hw, true);
+		igb_vmdq_set_anti_spoofing_pf(hw, true,
+						adapter->vfs_allocated_count);
 	} else {
 		igb_vmdq_set_loopback_pf(hw, false);
 		igb_vmdq_set_replication_pf(hw, false);