VLAN filtering was always performed, even if hw_vlan_filter was
disabled. During device initialization, default filter
RTE_MACVLAN_PERFECT_MATCH was applied. In this situation, all incoming
VLAN frames were dropped by the card (increase of the register RUPP - Rx
Unsupported Protocol).

In order to restore default behavior, if HW VLAN filtering is activated,
set a filter to match MAC and VLAN. If not, set a filter to only match
MAC.

Signed-off-by: Julien Meunier <julien.meunier at 6wind.com>
Signed-off-by: David Marchand <david.marchand at 6wind.com>
---
 drivers/net/i40e/i40e_ethdev.c | 39 ++++++++++++++++++++++++++++++++++++++-
 drivers/net/i40e/i40e_ethdev.h |  1 +
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index bf6220d..ef9d578 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -2332,6 +2332,13 @@ i40e_vlan_offload_set(struct rte_eth_dev *dev, int mask)
        struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
        struct i40e_vsi *vsi = pf->main_vsi;

+       if (mask & ETH_VLAN_FILTER_MASK) {
+               if (dev->data->dev_conf.rxmode.hw_vlan_filter)
+                       i40e_vsi_config_vlan_filter(vsi, TRUE);
+               else
+                       i40e_vsi_config_vlan_filter(vsi, FALSE);
+       }
+
        if (mask & ETH_VLAN_STRIP_MASK) {
                /* Enable or disable VLAN stripping */
                if (dev->data->dev_conf.rxmode.hw_vlan_strip)
@@ -4156,6 +4163,34 @@ fail_mem:
        return NULL;
 }

+/* Configure vlan filter on or off */
+int
+i40e_vsi_config_vlan_filter(struct i40e_vsi *vsi, bool on)
+{
+       struct i40e_hw *hw = I40E_VSI_TO_HW(vsi);
+       struct i40e_mac_filter_info filter;
+       int ret;
+
+       rte_memcpy(&filter.mac_addr,
+                  (struct ether_addr *)(hw->mac.perm_addr), ETH_ADDR_LEN);
+       ret = i40e_vsi_delete_mac(vsi, &filter.mac_addr);
+
+       if (on) {
+               /* Filter to match MAC and VLAN */
+               filter.filter_type = RTE_MACVLAN_PERFECT_MATCH;
+       } else {
+               /* Filter to match only MAC */
+               filter.filter_type = RTE_MAC_PERFECT_MATCH;
+       }
+
+       ret |= i40e_vsi_add_mac(vsi, &filter);
+
+       if (ret)
+               PMD_DRV_LOG(INFO, "Update VSI failed to %s vlan filter",
+                           on ? "enable" : "disable");
+       return ret;
+}
+
 /* Configure vlan stripping on or off */
 int
 i40e_vsi_config_vlan_stripping(struct i40e_vsi *vsi, bool on)
@@ -4203,9 +4238,11 @@ i40e_dev_init_vlan(struct rte_eth_dev *dev)
 {
        struct rte_eth_dev_data *data = dev->data;
        int ret;
+       int mask = 0;

        /* Apply vlan offload setting */
-       i40e_vlan_offload_set(dev, ETH_VLAN_STRIP_MASK);
+       mask = ETH_VLAN_STRIP_MASK | ETH_VLAN_FILTER_MASK;
+       i40e_vlan_offload_set(dev, mask);

        /* Apply double-vlan setting, not implemented yet */

diff --git a/drivers/net/i40e/i40e_ethdev.h b/drivers/net/i40e/i40e_ethdev.h
index 1f9792b..5505d72 100644
--- a/drivers/net/i40e/i40e_ethdev.h
+++ b/drivers/net/i40e/i40e_ethdev.h
@@ -551,6 +551,7 @@ void i40e_vsi_queues_unbind_intr(struct i40e_vsi *vsi);
 int i40e_vsi_vlan_pvid_set(struct i40e_vsi *vsi,
                           struct i40e_vsi_vlan_pvid_info *info);
 int i40e_vsi_config_vlan_stripping(struct i40e_vsi *vsi, bool on);
+int i40e_vsi_config_vlan_filter(struct i40e_vsi *vsi, bool on);
 uint64_t i40e_config_hena(uint64_t flags);
 uint64_t i40e_parse_hena(uint64_t flags);
 enum i40e_status_code i40e_fdir_setup_tx_resources(struct i40e_pf *pf);
-- 
2.1.4

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