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net/octeontx2: fix CQE ring prefetch on wrap around

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When computing the head of CQE ring of prefetch, use qmask to point to
the correct head index on wrap around case.

Fixes: cc4d7693f2 ("net/octeontx2: support Rx")
Cc: stable@dpdk.org

Signed-off-by: Kommula Shiva Shankar <kshankar@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
This commit is contained in:
Kommula Shiva Shankar 2019-09-13 21:01:12 +05:30 committed by Ferruh Yigit
parent 0cb4150f82
commit bd3e64cb1c
1 changed files with 2 additions and 1 deletions
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3
drivers/net/octeontx2/otx2_rx.c
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@ -61,7 +61,8 @@ nix_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
while (packets < nb_pkts) {
/* Prefetch N desc ahead */
rte_prefetch_non_temporal((void *)(desc + (CQE_SZ(head + 2))));
rte_prefetch_non_temporal((void *)(desc +
(CQE_SZ((head + 2) & qmask))));
cq = (struct nix_cqe_hdr_s *)(desc + CQE_SZ(head));
mbuf = nix_get_mbuf_from_cqe(cq, data_off);