[PATCH v2 5/5] net/cnxk: select optimized LLC transaction type

[Jerin Jacob]

On Thu, Feb 22, 2024 at 3:38 PM Rahul Bhansali <rbhansali at marvell.com> wrote:
>
> LLC transaction optimization by using LDWB LDTYPE option
> in SG preparation for Tx. With this, if data is present
> and dirty in LLC then the LLC would mark the data clean.
>
> Signed-off-by: Rahul Bhansali <rbhansali at marvell.com>

Series applied to dpdk-next-net-mrvl/for-main. Thanks



> ---
> Changes in v2: No change
>
>  drivers/net/cnxk/cn10k_tx.h | 16 +++++++++++++---
>  1 file changed, 13 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/cnxk/cn10k_tx.h b/drivers/net/cnxk/cn10k_tx.h
> index 664e47e1fc..fcd19be77e 100644
> --- a/drivers/net/cnxk/cn10k_tx.h
> +++ b/drivers/net/cnxk/cn10k_tx.h
> @@ -331,9 +331,15 @@ cn10k_nix_tx_skeleton(struct cn10k_eth_txq *txq, uint64_t *cmd,
>                 else
>                         cmd[2] = NIX_SUBDC_EXT << 60;
>                 cmd[3] = 0;
> -               cmd[4] = (NIX_SUBDC_SG << 60) | BIT_ULL(48);
> +               if (!(flags & NIX_TX_OFFLOAD_MBUF_NOFF_F))
> +                       cmd[4] = (NIX_SUBDC_SG << 60) | (NIX_SENDLDTYPE_LDWB << 58) | BIT_ULL(48);
> +               else
> +                       cmd[4] = (NIX_SUBDC_SG << 60) | BIT_ULL(48);
>         } else {
> -               cmd[2] = (NIX_SUBDC_SG << 60) | BIT_ULL(48);
> +               if (!(flags & NIX_TX_OFFLOAD_MBUF_NOFF_F))
> +                       cmd[2] = (NIX_SUBDC_SG << 60) | (NIX_SENDLDTYPE_LDWB << 58) | BIT_ULL(48);
> +               else
> +                       cmd[2] = (NIX_SUBDC_SG << 60) | BIT_ULL(48);
>         }
>  }
>
> @@ -1989,7 +1995,11 @@ cn10k_nix_xmit_pkts_vector(void *tx_queue, uint64_t *ws,
>
>         senddesc01_w1 = vdupq_n_u64(0);
>         senddesc23_w1 = senddesc01_w1;
> -       sgdesc01_w0 = vdupq_n_u64((NIX_SUBDC_SG << 60) | BIT_ULL(48));
> +       if (!(flags & NIX_TX_OFFLOAD_MBUF_NOFF_F))
> +               sgdesc01_w0 = vdupq_n_u64((NIX_SUBDC_SG << 60) | (NIX_SENDLDTYPE_LDWB << 58) |
> +                                         BIT_ULL(48));
> +       else
> +               sgdesc01_w0 = vdupq_n_u64((NIX_SUBDC_SG << 60) | BIT_ULL(48));
>         sgdesc23_w0 = sgdesc01_w0;
>
>         if (flags & NIX_TX_NEED_EXT_HDR) {
> --
> 2.25.1
>