[dpdk-dev] [PATCH v2] net/ice: fix link status recovery

[Qiming Yang]

This patch fix a kernel driver link status issue by recovering
link status when device stop.

Fixes: e6161345d8a9 ("net/ice: support link status change")
Cc: sta...@dpdk.org

Signed-off-by: Qiming Yang <qiming.y...@intel.com>
---
 drivers/net/ice/ice_ethdev.c | 27 ++++++++++++++++++++++++++-
 drivers/net/ice/ice_ethdev.h |  1 +
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index d746758..212e1c7 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -2277,7 +2277,10 @@ ice_dev_stop(struct rte_eth_dev *dev)
        /* Clear all queues and release mbufs */
        ice_clear_queues(dev);
 
-       ice_dev_set_link_down(dev);
+       if (pf->init_link_status)
+               ice_dev_set_link_up(dev);
+       else
+               ice_dev_set_link_down(dev);
 
        /* Clean datapath event and queue/vec mapping */
        rte_intr_efd_disable(intr_handle);
@@ -2648,6 +2651,26 @@ ice_rxq_intr_setup(struct rte_eth_dev *dev)
        return 0;
 }
 
+static void ice_get_init_link_status(struct rte_eth_dev *dev)
+{
+       struct ice_hw *hw = ICE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+       struct ice_pf *pf = ICE_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+       bool enable_lse = dev->data->dev_conf.intr_conf.lsc ? true : false;
+       struct ice_link_status link_status;
+       int ret;
+
+       ret = ice_aq_get_link_info(hw->port_info, enable_lse,
+                                  &link_status, NULL);
+       if (ret != ICE_SUCCESS) {
+               PMD_DRV_LOG(ERR, "Failed to get link info");
+               pf->init_link_status = false;
+               return;
+       }
+
+       if (link_status.link_info & ICE_AQ_LINK_UP)
+               pf->init_link_status = true;
+}
+
 static int
 ice_dev_start(struct rte_eth_dev *dev)
 {
@@ -2717,6 +2740,8 @@ ice_dev_start(struct rte_eth_dev *dev)
        if (ret != ICE_SUCCESS)
                PMD_DRV_LOG(WARNING, "Fail to set phy mask");
 
+       ice_get_init_link_status(dev);
+
        ice_dev_set_link_up(dev);
 
        /* Call get_link_info aq commond to enable/disable LSE */
diff --git a/drivers/net/ice/ice_ethdev.h b/drivers/net/ice/ice_ethdev.h
index de67e59..27db4e7 100644
--- a/drivers/net/ice/ice_ethdev.h
+++ b/drivers/net/ice/ice_ethdev.h
@@ -369,6 +369,7 @@ struct ice_pf {
        struct ice_parser_list rss_parser_list;
        struct ice_parser_list perm_parser_list;
        struct ice_parser_list dist_parser_list;
+       bool init_link_status;
 };
 
 #define ICE_MAX_QUEUE_NUM  2048
-- 
2.9.5