From: Haiyue Wang Date: Wed, 29 Jul 2020 07:50:39 +0000 (+0800) Subject: net/ice: calculate TCP header size for offload X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=7365a3cee51f;p=dpdk.git net/ice: calculate TCP header size for offload The ice needs the exact TCP header size including options for TCP checksum offload, but according to PKT_TX_TCP_CKSUM note, l4_len is not required to be set, so it needs to calculate the TCP header size if not set. Fixes: 17c7d0f9d6a4 ("net/ice: support basic Rx/Tx") Cc: stable@dpdk.org Signed-off-by: Haiyue Wang Acked-by: Qi Zhang Acked-by: Qiming Yang --- diff --git a/drivers/net/ice/ice_rxtx.c b/drivers/net/ice/ice_rxtx.c index ddf6a93fb2..bcb67ec251 100644 --- a/drivers/net/ice/ice_rxtx.c +++ b/drivers/net/ice/ice_rxtx.c @@ -2371,6 +2371,28 @@ ice_calc_pkt_desc(struct rte_mbuf *tx_pkt) return count; } +/* Calculate TCP header length for PKT_TX_TCP_CKSUM if not provided */ +static inline uint16_t +ice_calc_pkt_tcp_hdr(struct rte_mbuf *tx_pkt, union ice_tx_offload tx_offload) +{ + uint16_t tcpoff = tx_offload.l2_len + tx_offload.l3_len; + const struct rte_tcp_hdr *tcp_hdr; + struct rte_tcp_hdr _tcp_hdr; + + if (tcpoff + sizeof(struct rte_tcp_hdr) < tx_pkt->data_len) { + tcp_hdr = rte_pktmbuf_mtod_offset(tx_pkt, struct rte_tcp_hdr *, + tcpoff); + + return (tcp_hdr->data_off & 0xf0) >> 2; + } + + tcp_hdr = rte_pktmbuf_read(tx_pkt, tcpoff, sizeof(_tcp_hdr), &_tcp_hdr); + if (tcp_hdr) + return (tcp_hdr->data_off & 0xf0) >> 2; + else + return 0; +} + uint16_t ice_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) { @@ -2468,6 +2490,11 @@ ice_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) /* Enable checksum offloading */ if (ol_flags & ICE_TX_CKSUM_OFFLOAD_MASK) { + if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM && + !tx_offload.l4_len) + tx_offload.l4_len = + ice_calc_pkt_tcp_hdr(tx_pkt, tx_offload); + ice_txd_enable_checksum(ol_flags, &td_cmd, &td_offset, tx_offload); }