0011-net-ena-add-new-way-of-getting-Rx-drops.patch

From ea9b91a8a853dd97380de080f878c034e16240ec Mon Sep 17 00:00:00 2001
From: Rafal Kozik <rk@semihalf.com>
Date: Fri, 14 Dec 2018 14:18:43 +0100
Subject: [PATCH 11/27] net/ena: add new way of getting Rx drops

[ upstream commit 94c3e3765d9e0366acf145668d32d5eee3200c2b ]

The Rx drops cannot be acquired using the older API. Now, it must be
read in keep alive message.

Change-Id: I9a9740a001e79121681f244900d8c445fb73d5ff
Signed-off-by: Rafal Kozik <rk@semihalf.com>
Acked-by: Michal Krawczyk <mk@semihalf.com>
---
 drivers/net/ena/ena_ethdev.c | 10 ++++++++--
 drivers/net/ena/ena_ethdev.h |  1 +
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 96880aa87b..ee7605a3b6 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -890,6 +890,7 @@ static void ena_stats_restart(struct rte_eth_dev *dev)
 	rte_atomic64_init(&adapter->drv_stats->ierrors);
 	rte_atomic64_init(&adapter->drv_stats->oerrors);
 	rte_atomic64_init(&adapter->drv_stats->rx_nombuf);
+	rte_atomic64_init(&adapter->drv_stats->rx_drops);
 }
 
 static int ena_stats_get(struct rte_eth_dev *dev,
@@ -920,10 +921,9 @@ static int ena_stats_get(struct rte_eth_dev *dev,
 					ena_stats.rx_bytes_low);
 	stats->obytes = __MERGE_64B_H_L(ena_stats.tx_bytes_high,
 					ena_stats.tx_bytes_low);
-	stats->imissed = __MERGE_64B_H_L(ena_stats.rx_drops_high,
-					 ena_stats.rx_drops_low);
 
 	/* Driver related stats */
+	stats->imissed = rte_atomic64_read(&adapter->drv_stats->rx_drops);
 	stats->ierrors = rte_atomic64_read(&adapter->drv_stats->ierrors);
 	stats->oerrors = rte_atomic64_read(&adapter->drv_stats->oerrors);
 	stats->rx_nombuf = rte_atomic64_read(&adapter->drv_stats->rx_nombuf);
@@ -2266,8 +2266,14 @@ static void ena_keep_alive(void *adapter_data,
 			   __rte_unused struct ena_admin_aenq_entry *aenq_e)
 {
 	struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
+	struct ena_admin_aenq_keep_alive_desc *desc;
+	uint64_t rx_drops;
 
 	adapter->timestamp_wd = rte_get_timer_cycles();
+
+	desc = (struct ena_admin_aenq_keep_alive_desc *)aenq_e;
+	rx_drops = ((uint64_t)desc->rx_drops_high << 32) | desc->rx_drops_low;
+	rte_atomic64_set(&adapter->drv_stats->rx_drops, rx_drops);
 }
 
 /**
diff --git a/drivers/net/ena/ena_ethdev.h b/drivers/net/ena/ena_ethdev.h
index 322e90ace8..8eb8543c21 100644
--- a/drivers/net/ena/ena_ethdev.h
+++ b/drivers/net/ena/ena_ethdev.h
@@ -120,6 +120,7 @@ struct ena_driver_stats {
 	rte_atomic64_t ierrors;
 	rte_atomic64_t oerrors;
 	rte_atomic64_t rx_nombuf;
+	rte_atomic64_t rx_drops;
 };
 
 struct ena_stats_dev {
-- 
2.20.1