[PATCH v5] net/gve : Update EOP & csum bit in txd rte_mbuf chain

[Tathagat Priyadarshi]

hi Ferruh,

Could you please accept the updated patch?! let us know what's pending.

https://patches.dpdk.org/project/dpdk/patch/1722575288-2408630-1-git-send-email-tathagat.dpdk@gmail.com/

TIA

On Fri, Aug 2, 2024 at 10:40 AM Tathagat Priyadarshi
<tathagat.dpdk at gmail.com> wrote:
>
> Updated the if-else block with an optimised inverse operator. Thanks
> for your suggestion Stephen.
>
> On Fri, Aug 2, 2024 at 10:36 AM Tathagat Priyadarshi
> <tathagat.dpdk at gmail.com> wrote:
> >
> > The EOP and csum bit was not set for all the packets in mbuf chain
> > causing packet transmission stalls for packets split across
> > mbuf in chain.
> >
> > Fixes: 4022f99 ("net/gve: support basic Tx data path for DQO")
> > Cc: stable at dpdk.org
> >
> > Signed-off-by: Tathagat Priyadarshi <tathagat.dpdk at gmail.com>
> > Signed-off-by: Varun Lakkur Ambaji Rao <varun.la at gmail.com>
> >
> > Acked-by: Joshua Washington <joshwash at google.com>
> > ---
> >  drivers/net/gve/gve_tx_dqo.c | 9 ++++++---
> >  1 file changed, 6 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/net/gve/gve_tx_dqo.c b/drivers/net/gve/gve_tx_dqo.c
> > index a65e6aa..bbaf46d 100644
> > --- a/drivers/net/gve/gve_tx_dqo.c
> > +++ b/drivers/net/gve/gve_tx_dqo.c
> > @@ -89,6 +89,7 @@
> >         uint16_t sw_id;
> >         uint64_t bytes;
> >         uint16_t first_sw_id;
> > +       uint8_t csum;
> >
> >         sw_ring = txq->sw_ring;
> >         txr = txq->tx_ring;
> > @@ -114,6 +115,9 @@
> >                 ol_flags = tx_pkt->ol_flags;
> >                 nb_used = tx_pkt->nb_segs;
> >                 first_sw_id = sw_id;
> > +
> > +               csum = !!(ol_flags & GVE_TX_CKSUM_OFFLOAD_MASK_DQO);
> > +
> >                 do {
> >                         if (sw_ring[sw_id] != NULL)
> >                                 PMD_DRV_LOG(DEBUG, "Overwriting an entry in sw_ring");
> > @@ -126,6 +130,8 @@
> >                         txd->pkt.dtype = GVE_TX_PKT_DESC_DTYPE_DQO;
> >                         txd->pkt.compl_tag = rte_cpu_to_le_16(first_sw_id);
> >                         txd->pkt.buf_size = RTE_MIN(tx_pkt->data_len, GVE_TX_MAX_BUF_SIZE_DQO);
> > +                       txd->pkt.end_of_packet = 0;
> > +                       txd->pkt.checksum_offload_enable = csum;
> >
> >                         /* size of desc_ring and sw_ring could be different */
> >                         tx_id = (tx_id + 1) & mask;
> > @@ -138,9 +144,6 @@
> >                 /* fill the last descriptor with End of Packet (EOP) bit */
> >                 txd->pkt.end_of_packet = 1;
> >
> > -               if (ol_flags & GVE_TX_CKSUM_OFFLOAD_MASK_DQO)
> > -                       txd->pkt.checksum_offload_enable = 1;
> > -
> >                 txq->nb_free -= nb_used;
> >                 txq->nb_used += nb_used;
> >         }
> > --
> > 1.8.3.1
> >