net/hns3: remove one IO barrier in Rx

[dpdk.git] / drivers / net / hns3 / hns3_rxtx.c

diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index 34919cd..a1655e2 100644 (file)
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -1174,7 +1174,6 @@ hns3_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t nb_desc,
        rxq->io_base = (void *)((char *)hw->io_base + HNS3_TQP_REG_OFFSET +
                                idx * HNS3_TQP_REG_SIZE);
        rxq->rx_buf_len = hw->rx_buf_len;
-       rxq->non_vld_descs = 0;
        rxq->l2_errors = 0;
        rxq->pkt_len_errors = 0;
        rxq->l3_csum_erros = 0;
@@ -1421,7 +1420,6 @@ hns3_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
        uint16_t pkt_len;
        uint16_t nb_rx;
        uint16_t rx_id;
-       int num;                        /* num of desc in ring */
        int ret;
 
        nb_rx = 0;
@@ -1435,15 +1433,11 @@ hns3_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
        last_seg = rxq->pkt_last_seg;
        sw_ring = rxq->sw_ring;
 
-       /* Get num of packets in descriptor ring */
-       num = hns3_read_dev(rxq, HNS3_RING_RX_FBDNUM_REG);
-       while (nb_rx_bd < num && nb_rx < nb_pkts) {
+       while (nb_rx < nb_pkts) {
                rxdp = &rx_ring[rx_id];
                bd_base_info = rte_le_to_cpu_32(rxdp->rx.bd_base_info);
-               if (unlikely(!hns3_get_bit(bd_base_info, HNS3_RXD_VLD_B))) {
-                       rxq->non_vld_descs++;
+               if (unlikely(!hns3_get_bit(bd_base_info, HNS3_RXD_VLD_B)))
                        break;
-               }
 
                nmb = rte_mbuf_raw_alloc(rxq->mb_pool);
                if (unlikely(nmb == NULL)) {
@@ -1454,7 +1448,7 @@ hns3_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
                nb_rx_bd++;
                rxe = &sw_ring[rx_id];
                rx_id++;
-               if (rx_id == rxq->nb_rx_desc)
+               if (unlikely(rx_id == rxq->nb_rx_desc))
                        rx_id = 0;
 
                rte_prefetch0(sw_ring[rx_id].mbuf);