[dpdk-dev] [PATCH v 2/4] net/hns3: fix VLAN strip configuration when setting a PVID

["Wei Hu (Xavier)" <xavier.huwei@huawei.com>]

From: Chengchang Tang <tangchengchang@huawei.com>

Currently, based on hns3 PF device, hardware will strip 2 vlan tags when
ULP calls rte_eth_dev_set_vlan_pvid API function to set a PVID whether
vlan strip related offload is turned on by calling rte_eth_dev_configure
or rte_eth_dev_set_vlan_offload API function.

When recieving a QinQ packet with the pvid tag, if ULP does not configure
the vlan strip by the method mentioned above, a layer of vlan tag will be
lost to ULP, which is not the expected result.

It is supposed to configure the vlan strip according to the upper level
process's configuration.

Fixes: 411d23b9eafb ("net/hns3: support VLAN")
Cc: stable@dpdk.org

Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 4030bd3..244a3b8 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -832,25 +832,28 @@ hns3_update_vlan_filter_entries(struct hns3_adapter *hns,
 }
 
 static int
-hns3_en_rx_strip_all(struct hns3_adapter *hns, int on)
+hns3_en_pvid_strip(struct hns3_adapter *hns, int on)
 {
+	struct hns3_rx_vtag_cfg *old_cfg = &hns->pf.vtag_config.rx_vcfg;
 	struct hns3_rx_vtag_cfg rx_vlan_cfg;
-	struct hns3_hw *hw = &hns->hw;
 	bool rx_strip_en;
 	int ret;
 
-	rx_strip_en = on ? true : false;
-	rx_vlan_cfg.strip_tag1_en = rx_strip_en;
-	rx_vlan_cfg.strip_tag2_en = rx_strip_en;
+	rx_strip_en = old_cfg->rx_vlan_offload_en ? true : false;
+	if (on) {
+		rx_vlan_cfg.strip_tag1_en = rx_strip_en;
+		rx_vlan_cfg.strip_tag2_en = true;
+	} else {
+		rx_vlan_cfg.strip_tag1_en = false;
+		rx_vlan_cfg.strip_tag2_en = rx_strip_en;
+	}
 	rx_vlan_cfg.vlan1_vlan_prionly = false;
 	rx_vlan_cfg.vlan2_vlan_prionly = false;
-	rx_vlan_cfg.rx_vlan_offload_en = rx_strip_en;
+	rx_vlan_cfg.rx_vlan_offload_en = old_cfg->rx_vlan_offload_en;
 
 	ret = hns3_set_vlan_rx_offload_cfg(hns, &rx_vlan_cfg);
-	if (ret) {
-		hns3_err(hw, "enable strip rx failed, ret =%d", ret);
+	if (ret)
 		return ret;
-	}
 
 	hns3_update_rx_offload_cfg(hns, &rx_vlan_cfg);
 	return ret;
@@ -877,13 +880,15 @@ hns3_vlan_pvid_configure(struct hns3_adapter *hns, uint16_t pvid, int on)
 				    HNS3_PORT_BASE_VLAN_DISABLE;
 	ret = hns3_vlan_txvlan_cfg(hns, port_base_vlan_state, pvid);
 	if (ret) {
-		hns3_err(hw, "Failed to config tx vlan, ret =%d", ret);
+		hns3_err(hw, "failed to config tx vlan for pvid, ret = %d",
+			 ret);
 		return ret;
 	}
 
-	ret = hns3_en_rx_strip_all(hns, on);
+	ret = hns3_en_pvid_strip(hns, on);
 	if (ret) {
-		hns3_err(hw, "Failed to config rx vlan strip, ret =%d", ret);
+		hns3_err(hw, "failed to config rx vlan strip for pvid, "
+			 "ret = %d", ret);
 		return ret;
 	}
 
-- 
2.7.4