Re: [dpdk-dev] 82599 TX IP checksum offloading

[Daniel Kaminsky <daniel.kaminsky@infinitelocality.com>]

chen_Ip,

You shoudln't use PKT_RX_IPV4_HDR, either just PKT_TX_IP_CKSUM or some
other combination of PKT_TX_* (e.g. PKT_TX_OFFLOAD_MASK)

Daniel


On Mon, Nov 25, 2013 at 8:23 AM, chen_lp <chen_lp@neusoft.com> wrote:

> Hi,
> I want NIC to calculate ip checksum on dpdk-1.5.0,
>
> I have set:
> static const struct rte_eth_txconf tx_conf = {
>         .tx_thresh = {
>                 .pthresh = TX_PTHRESH,
>                 .hthresh = TX_HTHRESH,
>                 .wthresh = TX_WTHRESH,
>         },
>         .tx_free_thresh = 0,
>         .tx_rs_thresh = 0,
>         .txq_flags = 0,
> };
> this struct is used by int rte_eth_tx_queue_setup(uint8_t port_id,
> uint16_t tx_queue_id,
>                                   uint16_t nb_tx_desc, unsigned int
> socket_id,
>                                   const struct rte_eth_txconf **tx_conf*);
>
> when constructing the pkt will been sending:
>
> mbuf->ol_flags|=(PKT_TX_IP_CKSUM|PKT_RX_IPV4_HDR);
>                                            |~
> mbuf->pkt.vlan_macip.f.l2_len = sizeof(struct ether_hdr);
>                                             |~
> mbuf->pkt.vlan_macip.f.l3_len = sizeof(struct ipv4_hdr);
>
>
> but the NIC not calculate ip checksum,did anyone tell me what's wrong
> whith it?
> by the way,I create multi-queue for tx and rx.
>
>
> Thanks,
> chen_lp
>
>
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