net/octeontx: fix packet corruption on Tx

LMTST does not guarantee packet content get synced with L2C when
HW access the packet for transmitting.

Adding coherent IO write barrier will make sure HW sees the correct
packet if its modified.

Fixes: 9e747589bd4c ("net/octeontx: add packet transmit burst function")
Cc: stable@dpdk.org
Reported-by: Vikas Aggarwal <vikas.aggarwal@caviumnetworks.com>
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Acked-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>

diff --git a/drivers/net/octeontx/octeontx_rxtx.c b/drivers/net/octeontx/octeontx_rxtx.c
index a9149b4e12513fb657bf5d5e9d984132bf397edb..f861313e603e8727ebe8a18791b9ac6f96eccaf5 100644 (file)
--- a/drivers/net/octeontx/octeontx_rxtx.c
+++ b/drivers/net/octeontx/octeontx_rxtx.c
@@ -63,6 +63,7 @@ octeontx_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 
        count = 0;
 
+       rte_cio_wmb();
        while (count < nb_pkts) {
                res = __octeontx_xmit_pkts(dq->lmtline_va, dq->ioreg_va,
                                           dq->fc_status_va,