Support dev_ops link_update.

Signed-off-by: Xiaoyun Li <xiaoyun...@intel.com>
Signed-off-by: Junfeng Guo <junfeng....@intel.com>
---
 doc/guides/nics/features/gve.ini |  1 +
 doc/guides/nics/gve.rst          |  3 +++
 drivers/net/gve/gve_ethdev.c     | 30 ++++++++++++++++++++++++++++++
 3 files changed, 34 insertions(+)

diff --git a/doc/guides/nics/features/gve.ini b/doc/guides/nics/features/gve.ini
index 44aec28009..ae466ad677 100644
--- a/doc/guides/nics/features/gve.ini
+++ b/doc/guides/nics/features/gve.ini
@@ -4,6 +4,7 @@
 ; Refer to default.ini for the full list of available PMD features.
 ;
 [Features]
+Link status          = Y
 Linux                = Y
 x86-32               = Y
 x86-64               = Y
diff --git a/doc/guides/nics/gve.rst b/doc/guides/nics/gve.rst
index 703fbcc5de..c42ff23841 100644
--- a/doc/guides/nics/gve.rst
+++ b/doc/guides/nics/gve.rst
@@ -60,6 +60,9 @@ Features and Limitations
 
 In this release, the GVE PMD provides the basic functionality of packet
 reception and transmission.
+Supported features of the GVE PMD are:
+
+- Link state information
 
 Currently, only GQI_QPL and GQI_RDA queue format are supported in PMD.
 Jumbo Frame is not supported in PMD for now. It'll be added in the future
diff --git a/drivers/net/gve/gve_ethdev.c b/drivers/net/gve/gve_ethdev.c
index acbb412509..34243c1672 100644
--- a/drivers/net/gve/gve_ethdev.c
+++ b/drivers/net/gve/gve_ethdev.c
@@ -34,10 +34,39 @@ gve_dev_configure(__rte_unused struct rte_eth_dev *dev)
        return 0;
 }
 
+static int
+gve_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
+{
+       struct gve_priv *priv = dev->data->dev_private;
+       struct rte_eth_link link;
+       int err;
+
+       memset(&link, 0, sizeof(link));
+       link.link_duplex = RTE_ETH_LINK_FULL_DUPLEX;
+       link.link_autoneg = RTE_ETH_LINK_AUTONEG;
+
+       if (!dev->data->dev_started) {
+               link.link_status = RTE_ETH_LINK_DOWN;
+               link.link_speed = RTE_ETH_SPEED_NUM_NONE;
+       } else {
+               link.link_status = RTE_ETH_LINK_UP;
+               PMD_DRV_LOG(DEBUG, "Get link status from hw");
+               err = gve_adminq_report_link_speed(priv);
+               if (err) {
+                       PMD_DRV_LOG(ERR, "Failed to get link speed.");
+                       priv->link_speed = RTE_ETH_SPEED_NUM_UNKNOWN;
+               }
+               link.link_speed = priv->link_speed;
+       }
+
+       return rte_eth_linkstatus_set(dev, &link);
+}
+
 static int
 gve_dev_start(struct rte_eth_dev *dev)
 {
        dev->data->dev_started = 1;
+       gve_link_update(dev, 0);
 
        return 0;
 }
@@ -72,6 +101,7 @@ static const struct eth_dev_ops gve_eth_dev_ops = {
        .dev_start            = gve_dev_start,
        .dev_stop             = gve_dev_stop,
        .dev_close            = gve_dev_close,
+       .link_update          = gve_link_update,
 };
 
 static void
-- 
2.34.1

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