net/ena: add (un)likely statements

Add likely and unlikely statements to increase performance.

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 5fbf0e5..1425a04 100644 (file)
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -936,7 +936,7 @@ ena_calc_queue_size(struct ena_com_dev *ena_dev,
        if (!rte_is_power_of_2(queue_size))
                queue_size = rte_align32pow2(queue_size >> 1);
 
-       if (queue_size == 0) {
+       if (unlikely(queue_size == 0)) {
                PMD_INIT_LOG(ERR, "Invalid queue size");
                return -EFAULT;
        }
@@ -1360,7 +1360,7 @@ static int ena_populate_rx_queue(struct ena_ring *rxq, unsigned int count)
        }
 
        /* When we submitted free recources to device... */
-       if (i > 0) {
+       if (likely(i > 0)) {
                /* ...let HW know that it can fill buffers with data */
                rte_wmb();
                ena_com_write_sq_doorbell(rxq->ena_com_io_sq);
@@ -1466,7 +1466,7 @@ static void ena_interrupt_handler_rte(void *cb_arg)
        struct ena_com_dev *ena_dev = &adapter->ena_dev;
 
        ena_com_admin_q_comp_intr_handler(ena_dev);
-       if (adapter->state != ENA_ADAPTER_STATE_CLOSED)
+       if (likely(adapter->state != ENA_ADAPTER_STATE_CLOSED))
                ena_com_aenq_intr_handler(ena_dev, adapter);
 }
 
@@ -1856,7 +1856,7 @@ static uint16_t eth_ena_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
                        mbuf->data_off = RTE_PKTMBUF_HEADROOM;
                        mbuf->refcnt = 1;
                        mbuf->next = NULL;
-                       if (segments == 0) {
+                       if (unlikely(segments == 0)) {
                                mbuf->nb_segs = ena_rx_ctx.descs;
                                mbuf->port = rx_ring->port_id;
                                mbuf->pkt_len = 0;