[Patch v9 04/18] net/mana: support link update

[longli@linuxonhyperv.com]

From: Long Li <longli@microsoft.com>

The carrier state is managed by the Azure host. MANA runs as a VF and
always reports "up".

Signed-off-by: Long Li <longli@microsoft.com>
---
 doc/guides/nics/features/mana.ini |  1 +
 drivers/net/mana/mana.c           | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/doc/guides/nics/features/mana.ini b/doc/guides/nics/features/mana.ini
index b92a27374c..62554b0a0a 100644
--- a/doc/guides/nics/features/mana.ini
+++ b/doc/guides/nics/features/mana.ini
@@ -4,6 +4,7 @@
 ; Refer to default.ini for the full list of available PMD features.
 ;
 [Features]
+Link status          = P
 Linux                = Y
 Multiprocess aware   = Y
 Usage doc            = Y
diff --git a/drivers/net/mana/mana.c b/drivers/net/mana/mana.c
index 5fc656110f..90e713318a 100644
--- a/drivers/net/mana/mana.c
+++ b/drivers/net/mana/mana.c
@@ -134,10 +134,28 @@ mana_supported_ptypes(struct rte_eth_dev *dev __rte_unused)
 	return ptypes;
 }
 
+static int
+mana_dev_link_update(struct rte_eth_dev *dev,
+		     int wait_to_complete __rte_unused)
+{
+	struct rte_eth_link link;
+
+	/* MANA has no concept of carrier state, always reporting UP */
+	link = (struct rte_eth_link) {
+		.link_duplex = RTE_ETH_LINK_FULL_DUPLEX,
+		.link_autoneg = RTE_ETH_LINK_SPEED_FIXED,
+		.link_speed = RTE_ETH_SPEED_NUM_100G,
+		.link_status = RTE_ETH_LINK_UP,
+	};
+
+	return rte_eth_linkstatus_set(dev, &link);
+}
+
 static const struct eth_dev_ops mana_dev_ops = {
 	.dev_configure		= mana_dev_configure,
 	.dev_close		= mana_dev_close,
 	.dev_supported_ptypes_get = mana_supported_ptypes,
+	.link_update		= mana_dev_link_update,
 };
 
 static const struct eth_dev_ops mana_dev_secondary_ops = {
-- 
2.17.1