[dpdk-dev] [PATCH v2] i40evf: fix link info update

[Jingjing Wu <jingjing.wu@intel.com>]

The issue is the VF's link speed kept as 10G and status always was up.
It did not change even the physical link's status changed.
This patch fixes this issue to make VF's link info consistent with
physical link.

Fixes: 4861cde46116 (i40e: new poll mode driver)
Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
---
v2 change:
 rebase on latest code.

 doc/guides/rel_notes/release_16_04.rst |  6 ++++++
 drivers/net/i40e/i40e_ethdev.h         |  1 +
 drivers/net/i40e/i40e_ethdev_vf.c      | 37 ++++++++++++++++++++++++++++------
 3 files changed, 38 insertions(+), 6 deletions(-)

diff --git a/doc/guides/rel_notes/release_16_04.rst b/doc/guides/rel_notes/release_16_04.rst
index d6e358f..4804109 100644
--- a/doc/guides/rel_notes/release_16_04.rst
+++ b/doc/guides/rel_notes/release_16_04.rst
@@ -382,6 +382,12 @@ Drivers
   info for l3fwd to work well. Now there is an option for l3fwd to analysis
   packet type softly, so enable vector driver by default.
 
+* **i40e: Fixed link info of VF
+
+  Previously, the VF's link speed kept as 10G and status always was up. It did not
+  change even the physical link's status changed. Now this issue is fixed to make
+  VF's link info consistent with physical link.
+
 * **mlx5: Fixed possible crash during initialization.**
 
   A crash could occur when failing to allocate private device context.
diff --git a/drivers/net/i40e/i40e_ethdev.h b/drivers/net/i40e/i40e_ethdev.h
index ce945fe..cfd2399 100644
--- a/drivers/net/i40e/i40e_ethdev.h
+++ b/drivers/net/i40e/i40e_ethdev.h
@@ -502,6 +502,7 @@ struct i40e_vf {
 	/* Event from pf */
 	bool dev_closed;
 	bool link_up;
+	enum i40e_aq_link_speed link_speed;
 	bool vf_reset;
 	volatile uint32_t pend_cmd; /* pending command not finished yet */
 	uint32_t cmd_retval; /* return value of the cmd response from PF */
diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 8cf22ee..2bce69b 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -258,6 +258,8 @@ i40evf_read_pfmsg(struct rte_eth_dev *dev, struct i40evf_arq_msg_info *data)
 		case I40E_VIRTCHNL_EVENT_LINK_CHANGE:
 			vf->link_up =
 				vpe->event_data.link_event.link_status;
+			vf->link_speed =
+				vpe->event_data.link_event.link_speed;
 			vf->pend_msg |= PFMSG_LINK_CHANGE;
 			PMD_DRV_LOG(INFO, "Link status update:%s",
 				    vf->link_up ? "up" : "down");
@@ -1310,6 +1312,7 @@ i40evf_handle_pf_event(__rte_unused struct rte_eth_dev *dev,
 {
 	struct i40e_virtchnl_pf_event *pf_msg =
 			(struct i40e_virtchnl_pf_event *)msg;
+	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
 
 	switch (pf_msg->event) {
 	case I40E_VIRTCHNL_EVENT_RESET_IMPENDING:
@@ -1318,6 +1321,8 @@ i40evf_handle_pf_event(__rte_unused struct rte_eth_dev *dev,
 		break;
 	case I40E_VIRTCHNL_EVENT_LINK_CHANGE:
 		PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_LINK_CHANGE event\n");
+		vf->link_up = pf_msg->event_data.link_event.link_status;
+		vf->link_speed = pf_msg->event_data.link_event.link_speed;
 		break;
 	case I40E_VIRTCHNL_EVENT_PF_DRIVER_CLOSE:
 		PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_PF_DRIVER_CLOSE event\n");
@@ -2121,14 +2126,34 @@ i40evf_dev_link_update(struct rte_eth_dev *dev,
 	 * DPDK pf host provide interfacet to acquire link status
 	 * while Linux driver does not
 	 */
-	if (vf->version_major == I40E_DPDK_VERSION_MAJOR) {
+	if (vf->version_major == I40E_DPDK_VERSION_MAJOR)
 		i40evf_get_link_status(dev, &new_link);
-	} else {
-		/* Always assume it's up, for Linux driver PF host */
-		new_link.link_speed  = ETH_SPEED_NUM_10G;
+	else {
+		/* Linux driver PF host */
+		switch (vf->link_speed) {
+		case I40E_LINK_SPEED_100MB:
+			new_link.link_speed = ETH_SPEED_NUM_100M;
+			break;
+		case I40E_LINK_SPEED_1GB:
+			new_link.link_speed = ETH_SPEED_NUM_1G;
+			break;
+		case I40E_LINK_SPEED_10GB:
+			new_link.link_speed = ETH_SPEED_NUM_10G;
+			break;
+		case I40E_LINK_SPEED_20GB:
+			new_link.link_speed = ETH_SPEED_NUM_20G;
+			break;
+		case I40E_LINK_SPEED_40GB:
+			new_link.link_speed = ETH_SPEED_NUM_40G;
+			break;
+		default:
+			new_link.link_speed = ETH_SPEED_NUM_100M;
+			break;
+		}
+		/* full duplex only */
 		new_link.link_duplex = ETH_LINK_FULL_DUPLEX;
-		new_link.link_autoneg = ETH_LINK_SPEED_AUTONEG;
-		new_link.link_status = ETH_LINK_UP;
+		new_link.link_status = vf->link_up ? ETH_LINK_UP :
+						     ETH_LINK_DOWN;
 	}
 	i40evf_dev_atomic_write_link_status(dev, &new_link);
 
-- 
2.4.0