[dpdk-stable] [PATCH 1/4] net/ena: flush Rx buffers memory pool cache

[dpdk-stable] [PATCH 1/4] net/ena: flush Rx buffers memory pool cache

[Michal Krawczyk]

From: Ido Segev <idose@amazon.com>

As the refill called as part of ena_start(), we end up the refill
progress with stuck buffers at the caller core cache.

Calling to flush the cache results with invalidate this cache and free
those stuck buffers.

Fixes: 1173fca25af9 ("ena: add polling-mode driver")
Cc: stable@dpdk.org

Signed-off-by: Ido Segev <idose@amazon.com>
Reviewed-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
---
 drivers/net/ena/ena_ethdev.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 20ff3653c6..516e244295 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -1246,6 +1246,10 @@ static int ena_queue_start(struct ena_ring *ring)
 		PMD_INIT_LOG(ERR, "Failed to populate rx ring !");
 		return ENA_COM_FAULT;
 	}
+	/* Flush per-core RX buffers pools cache as they can be used on other
+	 * cores as well.
+	 */
+	rte_mempool_cache_flush(NULL, ring->mb_pool);
 
 	return 0;
 }
-- 
2.25.1

[dpdk-stable] [PATCH 2/4] net/ena: Tx doorbell statistics fix

[Michal Krawczyk]

From: Amit Bernstein <amitbern@amazon.com>

Increment Tx doorbell statistics on tx_pkt_burst
after writing to doorbell and in case max burst size achieved

Fixes: c7519ea5eb8d ("net/ena: call additional doorbells if needed")
Cc: stable@dpdk.org

Signed-off-by: Amit Bernstein <amitbern@amazon.com>
Reviewed-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
---
 drivers/net/ena/ena_ethdev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 516e244295..111e830bfa 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -2519,6 +2519,7 @@ static int ena_xmit_mbuf(struct ena_ring *tx_ring, struct rte_mbuf *mbuf)
 			"llq tx max burst size of queue %d achieved, writing doorbell to send burst\n",
 			tx_ring->id);
 		ena_com_write_sq_doorbell(tx_ring->ena_com_io_sq);
+		tx_ring->tx_stats.doorbells++;
 	}
 
 	/* prepare the packet's descriptors to dma engine */
-- 
2.25.1