[dpdk-dev] [PATCH 1/2] net/qede: fix incorrect link status update

[dpdk-dev] [PATCH 1/2] net/qede: fix incorrect link status update

[Rasesh Mody]

From: Shahed Shaikh <shahed.shaikh@cavium.com>

qede_link_update() always returns -1 i.e. link not changed,
becasue it compares the variables which always hold same value.

Fix this function by using rte_eth_linkstatus_set().

Fixes: 2ea6f76aff40 ("qede: add core driver")
Cc: stable@dpdk.org

Signed-off-by: Shahed Shaikh <shahed.shaikh@cavium.com>
---
 drivers/net/qede/qede_ethdev.c |   27 ++++++++++++++-------------
 1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/net/qede/qede_ethdev.c b/drivers/net/qede/qede_ethdev.c
index cd9ec10..7a63d05 100644
--- a/drivers/net/qede/qede_ethdev.c
+++ b/drivers/net/qede/qede_ethdev.c
@@ -1590,18 +1590,20 @@ static int qede_dev_configure(struct rte_eth_dev *eth_dev)
 {
 	struct qede_dev *qdev = eth_dev->data->dev_private;
 	struct ecore_dev *edev = &qdev->edev;
+	struct qed_link_output q_link;
+	struct rte_eth_link link;
 	uint16_t link_duplex;
-	struct qed_link_output link;
-	struct rte_eth_link *curr = &eth_dev->data->dev_link;
 
-	memset(&link, 0, sizeof(struct qed_link_output));
-	qdev->ops->common->get_link(edev, &link);
+	memset(&q_link, 0, sizeof(q_link));
+	memset(&link, 0, sizeof(link));
+
+	qdev->ops->common->get_link(edev, &q_link);
 
 	/* Link Speed */
-	curr->link_speed = link.speed;
+	link.link_speed = q_link.speed;
 
 	/* Link Mode */
-	switch (link.duplex) {
+	switch (q_link.duplex) {
 	case QEDE_DUPLEX_HALF:
 		link_duplex = ETH_LINK_HALF_DUPLEX;
 		break;
@@ -1612,21 +1614,20 @@ static int qede_dev_configure(struct rte_eth_dev *eth_dev)
 	default:
 		link_duplex = -1;
 	}
-	curr->link_duplex = link_duplex;
+	link.link_duplex = link_duplex;
 
 	/* Link Status */
-	curr->link_status = (link.link_up) ? ETH_LINK_UP : ETH_LINK_DOWN;
+	link.link_status = q_link.link_up ? ETH_LINK_UP : ETH_LINK_DOWN;
 
 	/* AN */
-	curr->link_autoneg = (link.supported_caps & QEDE_SUPPORTED_AUTONEG) ?
+	link.link_autoneg = (q_link.supported_caps & QEDE_SUPPORTED_AUTONEG) ?
 			     ETH_LINK_AUTONEG : ETH_LINK_FIXED;
 
 	DP_INFO(edev, "Link - Speed %u Mode %u AN %u Status %u\n",
-		curr->link_speed, curr->link_duplex,
-		curr->link_autoneg, curr->link_status);
+		link.link_speed, link.link_duplex,
+		link.link_autoneg, link.link_status);
 
-	/* return 0 means link status changed, -1 means not changed */
-	return ((curr->link_status == link.link_up) ? -1 : 0);
+	return rte_eth_linkstatus_set(eth_dev, &link);
 }
 
 static void qede_promiscuous_enable(struct rte_eth_dev *eth_dev)
-- 
1.7.10.3

[dpdk-dev] [PATCH 2/2] net/qede: fix link change event notification

[Rasesh Mody]

From: Shahed Shaikh <shahed.shaikh@cavium.com>

As per existing behavior, when firmware sends a link change
notification, PMD only updates the link structure but does
not notify applications about it.
This results in application sending packets even when link
status is down.

Fix this issue by issuing RTE_ETH_EVENT_INTR_LSC.

Fixes: ec94dbc57362 ("qede: add base driver")
Cc: stable@dpdk.org

Signed-off-by: Shahed Shaikh <shahed.shaikh@cavium.com>
---
 drivers/net/qede/qede_main.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/qede/qede_main.c b/drivers/net/qede/qede_main.c
index c3407fe..de5a7ca 100644
--- a/drivers/net/qede/qede_main.c
+++ b/drivers/net/qede/qede_main.c
@@ -634,8 +634,11 @@ void qed_link_update(struct ecore_hwfn *hwfn)
 {
 	struct ecore_dev *edev = hwfn->p_dev;
 	struct qede_dev *qdev = (struct qede_dev *)edev;
+	struct rte_eth_dev *dev = (struct rte_eth_dev *)qdev->ethdev;
 
-	qede_link_update((struct rte_eth_dev *)qdev->ethdev, 0);
+	if (!qede_link_update(dev, 0))
+		_rte_eth_dev_callback_process(dev,
+					      RTE_ETH_EVENT_INTR_LSC, NULL);
 }
 
 static int qed_drain(struct ecore_dev *edev)
-- 
1.7.10.3

Re: [dpdk-dev] [PATCH 1/2] net/qede: fix incorrect link status update

[Ferruh Yigit]

On 6/7/2018 5:30 PM, Rasesh Mody wrote:
> From: Shahed Shaikh <shahed.shaikh@cavium.com>
> 
> qede_link_update() always returns -1 i.e. link not changed,
> becasue it compares the variables which always hold same value.
> 
> Fix this function by using rte_eth_linkstatus_set().
> 
> Fixes: 2ea6f76aff40 ("qede: add core driver")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Shahed Shaikh <shahed.shaikh@cavium.com>

Series applied to dpdk-next-net/master, thanks.