[PATCH v3 3/5] net/ena: report Rx overrun errors in xstats

[shaibran at amazon.com]

From: Shai Brandes <shaibran at amazon.com>

RX overrun error occur when a packet arrives but there are
not enough free buffers in the RX ring to receive it.
The driver publishes the extended statistics with the RX
buffer overrun errors as reported by the device.

Signed-off-by: Shai Brandes <shaibran at amazon.com>
Reviewed-by: Amit Bernstein <amitbern at amazon.com>
---
 doc/guides/rel_notes/release_23_11.rst | 1 +
 drivers/net/ena/ena_ethdev.c           | 4 ++++
 drivers/net/ena/ena_ethdev.h           | 1 +
 3 files changed, 6 insertions(+)

diff --git a/doc/guides/rel_notes/release_23_11.rst b/doc/guides/rel_notes/release_23_11.rst
index 77731fbf6a..2666371ccd 100644
--- a/doc/guides/rel_notes/release_23_11.rst
+++ b/doc/guides/rel_notes/release_23_11.rst
@@ -126,6 +126,7 @@ New Features
 
   * Upgraded ENA HAL to latest version.
   * Added support for connection tracking allowance utilization metric.
+  * Added support for reporting rx overrun errors in xstats.
 
 * **Updated Intel cpfl driver.**
 
diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 3e79a58541..bd9d7c6249 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -90,6 +90,7 @@ static const struct ena_stats ena_stats_global_strings[] = {
 	ENA_STAT_GLOBAL_ENTRY(dev_start),
 	ENA_STAT_GLOBAL_ENTRY(dev_stop),
 	ENA_STAT_GLOBAL_ENTRY(tx_drops),
+	ENA_STAT_GLOBAL_ENTRY(rx_overruns),
 };
 
 /*
@@ -3906,15 +3907,18 @@ static void ena_keep_alive(void *adapter_data,
 	struct ena_admin_aenq_keep_alive_desc *desc;
 	uint64_t rx_drops;
 	uint64_t tx_drops;
+	uint64_t rx_overruns;
 
 	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;
 	tx_drops = ((uint64_t)desc->tx_drops_high << 32) | desc->tx_drops_low;
+	rx_overruns = ((uint64_t)desc->rx_overruns_high << 32) | desc->rx_overruns_low;
 
 	adapter->drv_stats->rx_drops = rx_drops;
 	adapter->dev_stats.tx_drops = tx_drops;
+	adapter->dev_stats.rx_overruns = rx_overruns;
 }
 
 /**
diff --git a/drivers/net/ena/ena_ethdev.h b/drivers/net/ena/ena_ethdev.h
index 9268d44dde..3f29764ca6 100644
--- a/drivers/net/ena/ena_ethdev.h
+++ b/drivers/net/ena/ena_ethdev.h
@@ -219,6 +219,7 @@ struct ena_stats_dev {
 	 * As a workaround it is being published as an extended statistic.
 	 */
 	u64 tx_drops;
+	u64 rx_overruns;
 };
 
 struct ena_stats_metrics {
-- 
2.17.1