net/ena: call additional doorbells if needed

Before sending next packet, check if calling doorbell is needed.

Signed-off-by: Rafal Kozik <rk@semihalf.com>
Acked-by: Michal Krawczyk <mk@semihalf.com>

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index f835523..5f7dec0 100644 (file)
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -2363,7 +2363,16 @@ static uint16_t eth_ena_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 
                ena_tx_ctx.num_bufs = tx_info->num_of_bufs;
 
-               /* Write data to device */
+               if (ena_com_is_doorbell_needed(tx_ring->ena_com_io_sq,
+                                              &ena_tx_ctx)) {
+                       RTE_LOG(DEBUG, PMD, "llq tx max burst size of queue %d"
+                               " achieved, writing doorbell to send burst\n",
+                               tx_ring->id);
+                       rte_wmb();
+                       ena_com_write_sq_doorbell(tx_ring->ena_com_io_sq);
+               }
+
+               /* prepare the packet's descriptors to dma engine */
                rc = ena_com_prepare_tx(tx_ring->ena_com_io_sq,
                                        &ena_tx_ctx, &nb_hw_desc);
                if (unlikely(rc))