net/iavf: fix Tx checksum offload in AVX path

Fix iavf vf_checksum_sw case fail in X710/XXV710, set bit2 to 1
of CMD field in Tx descriptor of AVX Tx path according to Spec.

Fixes: af0c246a3800 ("net/iavf: enable AVX2 for iavf")

Signed-off-by: Leyi Rong <leyi.rong@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

diff --git a/drivers/net/iavf/iavf_rxtx_vec_avx2.c b/drivers/net/iavf/iavf_rxtx_vec_avx2.c
index f0c00be..a5133d8 100644 (file)
--- a/drivers/net/iavf/iavf_rxtx_vec_avx2.c
+++ b/drivers/net/iavf/iavf_rxtx_vec_avx2.c
@@ -785,8 +785,9 @@ iavf_xmit_fixed_burst_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts,
        volatile struct iavf_tx_desc *txdp;
        struct iavf_tx_entry *txep;
        uint16_t n, nb_commit, tx_id;
-       uint64_t flags = IAVF_TX_DESC_CMD_EOP;
-       uint64_t rs = IAVF_TX_DESC_CMD_RS | IAVF_TX_DESC_CMD_EOP;
+       /* bit2 is reserved and must be set to 1 according to Spec */
+       uint64_t flags = IAVF_TX_DESC_CMD_EOP | IAVF_TX_DESC_CMD_ICRC;
+       uint64_t rs = IAVF_TX_DESC_CMD_RS | flags;
 
        /* cross rx_thresh boundary is not allowed */
        nb_pkts = RTE_MIN(nb_pkts, txq->rs_thresh);