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authorGreg Rose <gregory.v.rose@intel.com>2013-03-26 06:19:41 +0000
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2013-04-24 20:30:08 -0700
commit6f3dc319ec5c101e1e927e55d593ad6637648fe5 (patch)
treee66c72c059624720165ef22f8498fb0b0fcbdcb2 /drivers/net/ethernet/intel/igb
parentc0ba477807191d04f95057a58e08c88ad27b284c (diff)
downloadblackbird-op-linux-6f3dc319ec5c101e1e927e55d593ad6637648fe5.tar.gz
blackbird-op-linux-6f3dc319ec5c101e1e927e55d593ad6637648fe5.zip
igb: Retain HW VLAN filtering while in promiscuous + VT mode
When using the new bridge FDB interface to allow SR-IOV virtual function network devices to communicate with SW bridged network devices the physical function is placed into promiscuous mode and hardware VLAN filtering is disabled. This defeats the ability to use VLAN tagging to isolate user networks. When the device is in promiscuous mode and VT mode simultaneously ensure that VLAN hardware filtering remains enabled. Signed-off-by: Greg Rose <gregory.v.rose@intel.com> Tested-by: Sibai Li <sibai.li@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igb')
-rw-r--r--drivers/net/ethernet/intel/igb/igb_main.c69
1 files changed, 68 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 93be6eced2e3..59a28fec83e8 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -3736,6 +3736,10 @@ static void igb_set_rx_mode(struct net_device *netdev)
rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE | E1000_RCTL_VFE);
if (netdev->flags & IFF_PROMISC) {
+ u32 mrqc = rd32(E1000_MRQC);
+ /* retain VLAN HW filtering if in VT mode */
+ if (mrqc & E1000_MRQC_ENABLE_VMDQ)
+ rctl |= E1000_RCTL_VFE;
rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
vmolr |= (E1000_VMOLR_ROPE | E1000_VMOLR_MPME);
} else {
@@ -5520,12 +5524,75 @@ out:
return err;
}
+static int igb_find_vlvf_entry(struct igb_adapter *adapter, int vid)
+{
+ struct e1000_hw *hw = &adapter->hw;
+ int i;
+ u32 reg;
+
+ /* Find the vlan filter for this id */
+ for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
+ reg = rd32(E1000_VLVF(i));
+ if ((reg & E1000_VLVF_VLANID_ENABLE) &&
+ vid == (reg & E1000_VLVF_VLANID_MASK))
+ break;
+ }
+
+ if (i >= E1000_VLVF_ARRAY_SIZE)
+ i = -1;
+
+ return i;
+}
+
static int igb_set_vf_vlan(struct igb_adapter *adapter, u32 *msgbuf, u32 vf)
{
+ struct e1000_hw *hw = &adapter->hw;
int add = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT;
int vid = (msgbuf[1] & E1000_VLVF_VLANID_MASK);
+ int err = 0;
- return igb_vlvf_set(adapter, vid, add, vf);
+ /* If in promiscuous mode we need to make sure the PF also has
+ * the VLAN filter set.
+ */
+ if (add && (adapter->netdev->flags & IFF_PROMISC))
+ err = igb_vlvf_set(adapter, vid, add,
+ adapter->vfs_allocated_count);
+ if (err)
+ goto out;
+
+ err = igb_vlvf_set(adapter, vid, add, vf);
+
+ if (err)
+ goto out;
+
+ /* Go through all the checks to see if the VLAN filter should
+ * be wiped completely.
+ */
+ if (!add && (adapter->netdev->flags & IFF_PROMISC)) {
+ u32 vlvf, bits;
+
+ int regndx = igb_find_vlvf_entry(adapter, vid);
+ if (regndx < 0)
+ goto out;
+ /* See if any other pools are set for this VLAN filter
+ * entry other than the PF.
+ */
+ vlvf = bits = rd32(E1000_VLVF(regndx));
+ bits &= 1 << (E1000_VLVF_POOLSEL_SHIFT +
+ adapter->vfs_allocated_count);
+ /* If the filter was removed then ensure PF pool bit
+ * is cleared if the PF only added itself to the pool
+ * because the PF is in promiscuous mode.
+ */
+ if ((vlvf & VLAN_VID_MASK) == vid &&
+ !test_bit(vid, adapter->active_vlans) &&
+ !bits)
+ igb_vlvf_set(adapter, vid, add,
+ adapter->vfs_allocated_count);
+ }
+
+out:
+ return err;
}
static inline void igb_vf_reset(struct igb_adapter *adapter, u32 vf)
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