Re: [PATCH] i40e: fix vlan filtering

["Zhang, Helin" <helin.zhang@intel.com>]

Hi Julien

Nice of seeing your patch for this issue, which has been in our issue list.
I will ask a validation here for your patch. My comments inlined.
Thank you very much!

Regards,
Helin

-----Original Message-----
From: Julien Meunier [mailto:julien.meunier@6wind.com] 
Sent: Tuesday, January 19, 2016 1:19 AM
To: Zhang, Helin <helin.zhang@intel.com>
Cc: dev@dpdk.org
Subject: [PATCH] i40e: fix vlan filtering

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@6wind.com>
Signed-off-by: David Marchand <david.marchand@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);
It would be better to use ether_addr_copy() for mac copy.

+	ret = i40e_vsi_delete_mac(vsi, &filter.mac_addr);
It would be better to add debug messages here for failure case.

+
+	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