[dpdk-dev] [PATCH v3] i40e: fix resetting of stats

[Harry van Haaren <harry.van.haaren@intel.com>]

This patch fixes a bug where only some of the statistics were being
reset when calling rte_eth_stats_reset() or rte_eth_xstats_reset().
As both the stats reset and xstats reset do the same, refactor away
the duplicated function.

This patch marks the VSI to update its offset, causing the stats be
look like they are reset.

Fixes: 9aace75fc82e ("i40e: fix statistics")

Signed-off-by: Harry van Haaren <harry.van.haaren@gmail.com>
---

v3: Refactor away function, fixing stats and xstats reset
v2: Remove commented code


 drivers/net/i40e/i40e_ethdev.c | 25 ++++++++-----------------
 1 file changed, 8 insertions(+), 17 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index a39bd28..e7f1fc7 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -426,7 +426,7 @@ static const struct eth_dev_ops i40e_eth_dev_ops = {
 	.stats_get                    = i40e_dev_stats_get,
 	.xstats_get                   = i40e_dev_xstats_get,
 	.stats_reset                  = i40e_dev_stats_reset,
-	.xstats_reset                 = i40e_dev_xstats_reset,
+	.xstats_reset                 = i40e_dev_stats_reset,
 	.queue_stats_mapping_set      = i40e_dev_queue_stats_mapping_set,
 	.dev_infos_get                = i40e_dev_info_get,
 	.vlan_filter_set              = i40e_vlan_filter_set,
@@ -2124,19 +2124,20 @@ i40e_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	PMD_DRV_LOG(DEBUG, "***************** PF stats end ********************");
 }
 
+/* Reset the statistics */
 static void
-i40e_dev_xstats_reset(struct rte_eth_dev *dev)
+i40e_dev_stats_reset(struct rte_eth_dev *dev)
 {
 	struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
 	struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-	struct i40e_hw_port_stats *hw_stats = &pf->stats;
 
-	/* The hw registers are cleared on read */
+	/* Mark PF and VSI stats to update the offset, aka "reset" */
 	pf->offset_loaded = false;
-	i40e_read_stats_registers(pf, hw);
+	if (pf->main_vsi)
+		pf->main_vsi->offset_loaded = false;
 
-	/* reset software counters */
-	memset(hw_stats, 0, sizeof(*hw_stats));
+	/* read the stats, reading current register values into offset */
+	i40e_read_stats_registers(pf, hw);
 }
 
 static int
@@ -2216,16 +2217,6 @@ i40e_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstats *xstats,
 	return I40E_NB_XSTATS;
 }
 
-/* Reset the statistics */
-static void
-i40e_dev_stats_reset(struct rte_eth_dev *dev)
-{
-	struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
-
-	/* It results in reloading the start point of each counter */
-	pf->offset_loaded = false;
-}
-
 static int
 i40e_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *dev,
 				 __rte_unused uint16_t queue_id,
-- 
1.9.1