[dpdk-dev] [PATCH 2/6] net/hns3: fix VF configuration table entries restore failure

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

From: "Wei Hu (Xavier)" <xavier_huwei@163.com>

When the application using VF device exits abnormally, for example,
when it is killed by 'kill -9', kernel PF netdev driver also stores
the corresponding configuration table entries of VF device.

This patch fixes it by adding message of deleting VF configuration
table entry corresponds to the revision of kernel hns3 netdev
driver, the new message is added to notify the kernel PF netdev
driver to clean up the VF configuration initialization during VF
initialization.

This revision is compatible with the old version of kernel hns3
netdev driver. The old version of kernel pf netdev driver will
ignore this message.

Fixes: a5475d61fa34 ("net/hns3: support VF")
Cc: stable@dpdk.org

Signed-off-by: Hongbo Zheng <zhenghongbo3@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier_huwei@163.com>
---
 drivers/net/hns3/hns3_ethdev_vf.c | 14 ++++++++++++++
 drivers/net/hns3/hns3_mbx.h       |  6 ++++++
 2 files changed, 20 insertions(+)

diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index 403674969..2274ac35e 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -1096,6 +1096,14 @@ hns3vf_init_hardware(struct hns3_adapter *hns)
 	return ret;
 }
 
+static int
+hns3vf_clear_vport_list(struct hns3_hw *hw)
+{
+	return hns3_send_mbx_msg(hw, HNS3_MBX_HANDLE_VF_TBL,
+				 HNS3_MBX_VPORT_LIST_CLEAR, NULL, 0, false,
+				 NULL, 0);
+}
+
 static int
 hns3vf_init_vf(struct rte_eth_dev *eth_dev)
 {
@@ -1147,6 +1155,12 @@ hns3vf_init_vf(struct rte_eth_dev *eth_dev)
 
 	rte_eth_random_addr(hw->mac.mac_addr); /* Generate a random mac addr */
 
+	ret = hns3vf_clear_vport_list(hw);
+	if (ret) {
+		PMD_INIT_LOG(ERR, "Failed to clear tbl list: %d", ret);
+		goto err_get_config;
+	}
+
 	ret = hns3vf_init_hardware(hns);
 	if (ret)
 		goto err_get_config;
diff --git a/drivers/net/hns3/hns3_mbx.h b/drivers/net/hns3/hns3_mbx.h
index ee6e82314..01eddb845 100644
--- a/drivers/net/hns3/hns3_mbx.h
+++ b/drivers/net/hns3/hns3_mbx.h
@@ -39,6 +39,8 @@ enum HNS3_MBX_OPCODE {
 	HNS3_MBX_SET_ALIVE,             /* (VF -> PF) set alive state */
 	HNS3_MBX_SET_MTU,               /* (VF -> PF) set mtu */
 	HNS3_MBX_GET_QID_IN_PF,         /* (VF -> PF) get queue id in pf */
+
+	HNS3_MBX_HANDLE_VF_TBL = 38,    /* (VF -> PF) store/clear hw cfg tbl */
 };
 
 /* below are per-VF mac-vlan subcodes */
@@ -58,6 +60,10 @@ enum hns3_mbx_vlan_cfg_subcode {
 	HNS3_MBX_VLAN_RX_OFF_CFG,               /* set rx side vlan offload */
 };
 
+enum hns3_mbx_tbl_cfg_subcode {
+	HNS3_MBX_VPORT_LIST_CLEAR = 0,
+};
+
 #define HNS3_MBX_MAX_MSG_SIZE	16
 #define HNS3_MBX_MAX_RESP_DATA_SIZE	8
 #define HNS3_MBX_RING_MAP_BASIC_MSG_NUM	3
-- 
2.23.0