From: Jacob Keller <jacob.e.keller@intel.com>
Date: Wed, 24 Jun 2015 20:34:46 +0000 (-0700)
Subject: fm10k: send traffic on default VID to VLAN device if we have one
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e71c9318428fb16de808b497e0229994010d32a1;p=linux-beck.git

fm10k: send traffic on default VID to VLAN device if we have one

This patch ensures that VLAN traffic on the default VID will go to the
corresponding VLAN device if it exists. To do this, mask the rx_ring VID
if we have an active VLAN on that VID.

For this to work correctly, we need to update fm10k_process_skb_fields
to correctly mask off the VLAN_PRIO_MASK bits and compare them
separately, otherwise we incorrectly compare the priority bits with the
cleared flag. This also happens to fix a related bug where having
priority bits set causes us to incorrectly classify traffic.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_main.c b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
index 6ad03e0f2e30..92d415584749 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_main.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
@@ -497,8 +497,11 @@ static unsigned int fm10k_process_skb_fields(struct fm10k_ring *rx_ring,
 	if (rx_desc->w.vlan) {
 		u16 vid = le16_to_cpu(rx_desc->w.vlan);
 
-		if (vid != rx_ring->vid)
+		if ((vid & VLAN_VID_MASK) != rx_ring->vid)
 			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
+		else if (vid & VLAN_PRIO_MASK)
+			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
+					       vid & VLAN_PRIO_MASK);
 	}
 
 	fm10k_type_trans(rx_ring, rx_desc, skb);
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
index e1ceb3a2e2cd..3a6230b405fe 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
@@ -758,6 +758,7 @@ static int fm10k_update_vid(struct net_device *netdev, u16 vid, bool set)
 	struct fm10k_intfc *interface = netdev_priv(netdev);
 	struct fm10k_hw *hw = &interface->hw;
 	s32 err;
+	int i;
 
 	/* updates do not apply to VLAN 0 */
 	if (!vid)
@@ -775,6 +776,17 @@ static int fm10k_update_vid(struct net_device *netdev, u16 vid, bool set)
 	if (!set)
 		clear_bit(vid, interface->active_vlans);
 
+	/* disable the default VID on ring if we have an active VLAN */
+	for (i = 0; i < interface->num_rx_queues; i++) {
+		struct fm10k_ring *rx_ring = interface->rx_ring[i];
+		u16 rx_vid = rx_ring->vid & (VLAN_N_VID - 1);
+
+		if (test_bit(rx_vid, interface->active_vlans))
+			rx_ring->vid |= FM10K_VLAN_CLEAR;
+		else
+			rx_ring->vid &= ~FM10K_VLAN_CLEAR;
+	}
+
 	/* Do not remove default VID related entries from VLAN and MAC tables */
 	if (!set && vid == hw->mac.default_vid)
 		return 0;
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
index 9f2b2f19e2a4..9bdc04da451e 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
@@ -678,6 +678,10 @@ static void fm10k_configure_rx_ring(struct fm10k_intfc *interface,
 	/* assign default VLAN to queue */
 	ring->vid = hw->mac.default_vid;
 
+	/* if we have an active VLAN, disable default VID */
+	if (test_bit(hw->mac.default_vid, interface->active_vlans))
+		ring->vid |= FM10K_VLAN_CLEAR;
+
 	/* Map interrupt */
 	if (ring->q_vector) {
 		rxint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);