iavf: Fix refreshing iavf adapter stats on ethtool request

[ Upstream commit 3b5bdd18eb76e7570d9bacbcab6828a9b26ae121 ]

Currently iavf adapter statistics are refreshed only in a
watchdog task, triggered approximately every two seconds,
which causes some ethtool requests to return outdated values.

Add explicit statistics refresh when requested by ethtool -S.

Fixes: b476b0030e61 ("iavf: Move commands processing to the separate function")
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/intel/iavf/iavf.h b/drivers/net/ethernet/intel/iavf/iavf.h
index 46312a4415baf75932e29fc33ccb90843ea176c2..dd81698f0d596aefbe10001467b71701d68a3484 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf.h
+++ b/drivers/net/ethernet/intel/iavf/iavf.h
@@ -305,6 +305,7 @@ struct iavf_adapter {
 #define IAVF_FLAG_AQ_DEL_FDIR_FILTER           BIT(26)
 #define IAVF_FLAG_AQ_ADD_ADV_RSS_CFG           BIT(27)
 #define IAVF_FLAG_AQ_DEL_ADV_RSS_CFG           BIT(28)
+#define IAVF_FLAG_AQ_REQUEST_STATS             BIT(29)
 
        /* OS defined structs */
        struct net_device *netdev;
@@ -398,6 +399,7 @@ int iavf_up(struct iavf_adapter *adapter);
 void iavf_down(struct iavf_adapter *adapter);
 int iavf_process_config(struct iavf_adapter *adapter);
 void iavf_schedule_reset(struct iavf_adapter *adapter);
+void iavf_schedule_request_stats(struct iavf_adapter *adapter);
 void iavf_reset(struct iavf_adapter *adapter);
 void iavf_set_ethtool_ops(struct net_device *netdev);
 void iavf_update_stats(struct iavf_adapter *adapter);

diff --git a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
index 71b23922089fbb5207e1e226cbc806a372eda11d..0cecaff38d0427c4d1ccf69e02c2d8d007e19ad1 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
@@ -354,6 +354,9 @@ static void iavf_get_ethtool_stats(struct net_device *netdev,
        struct iavf_adapter *adapter = netdev_priv(netdev);
        unsigned int i;
 
+       /* Explicitly request stats refresh */
+       iavf_schedule_request_stats(adapter);
+
        iavf_add_ethtool_stats(&data, adapter, iavf_gstrings_stats);
 
        rcu_read_lock();

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index aaf8a2f396e46d2a202af515339ad259f7d433dc..5173b6293c6d97ce8e3596fc142dcd37805c0717 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -165,6 +165,19 @@ void iavf_schedule_reset(struct iavf_adapter *adapter)
        }
 }
 
+/**
+ * iavf_schedule_request_stats - Set the flags and schedule statistics request
+ * @adapter: board private structure
+ *
+ * Sets IAVF_FLAG_AQ_REQUEST_STATS flag so iavf_watchdog_task() will explicitly
+ * request and refresh ethtool stats
+ **/
+void iavf_schedule_request_stats(struct iavf_adapter *adapter)
+{
+       adapter->aq_required |= IAVF_FLAG_AQ_REQUEST_STATS;
+       mod_delayed_work(iavf_wq, &adapter->watchdog_task, 0);
+}
+
 /**
  * iavf_tx_timeout - Respond to a Tx Hang
  * @netdev: network interface device structure
@@ -1700,6 +1713,11 @@ static int iavf_process_aq_command(struct iavf_adapter *adapter)
                iavf_del_adv_rss_cfg(adapter);
                return 0;
        }
+       if (adapter->aq_required & IAVF_FLAG_AQ_REQUEST_STATS) {
+               iavf_request_stats(adapter);
+               return 0;
+       }
+
        return -EAGAIN;
 }
 

diff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
index 3c735968e1b8527037a315a4bb74c3b6b930189d..33bde032ca37e19226edc1ebe4b6bcfb5110e2e6 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
@@ -784,6 +784,8 @@ void iavf_request_stats(struct iavf_adapter *adapter)
                /* no error message, this isn't crucial */
                return;
        }
+
+       adapter->aq_required &= ~IAVF_FLAG_AQ_REQUEST_STATS;
        adapter->current_op = VIRTCHNL_OP_GET_STATS;
        vqs.vsi_id = adapter->vsi_res->vsi_id;
        /* queue maps are ignored for this message - only the vsi is used */