Re: [dpdk-stable] [PATCH v3] net/mlx5: fix Tx metadata for multi-segment packet

[Yongseok Koh <yskoh@mellanox.com>]

> On Jan 30, 2019, at 3:43 PM, Dekel Peled <dekelp@mellanox.com> wrote:
> 
> Original patch implemented the use of match_metadata offload in the
> different burst functions.
> The concurrent use of match_metadata and multi_segs offloads was
> not handled.
> 
> This patch updates function txq_scatter_v(), to pass metadata value
> from mbuf to wqe, when indicated by offload flags.
> 
> Fixes: 6bd7fbd03c62 ("net/mlx5: support metadata as flow rule criteria")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Dekel Peled <dekelp@mellanox.com>
> 
> ---

Acked-by: Yongseok Koh <yskoh@mellanox.com>
 
Thanks

> v3: Update title, modify indentation.
> v2: Apply code review comments.
> ---
> ---
> drivers/net/mlx5/mlx5_rxtx_vec_neon.h | 12 +++++++++---
> drivers/net/mlx5/mlx5_rxtx_vec_sse.h  | 11 ++++++++---
> 2 files changed, 17 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_neon.h b/drivers/net/mlx5/mlx5_rxtx_vec_neon.h
> index 883fe1b..38e915c 100644
> --- a/drivers/net/mlx5/mlx5_rxtx_vec_neon.h
> +++ b/drivers/net/mlx5/mlx5_rxtx_vec_neon.h
> @@ -104,6 +104,8 @@
> 		sizeof(struct mlx5_wqe) / MLX5_WQE_DWORD_SIZE;
> 	unsigned int n;
> 	volatile struct mlx5_wqe *wqe = NULL;
> +	bool metadata_ol =
> +		txq->offloads & DEV_TX_OFFLOAD_MATCH_METADATA ? true : false;
> 
> 	assert(elts_n > pkts_n);
> 	mlx5_tx_complete(txq);
> @@ -127,6 +129,9 @@
> 		uint8x16_t *t_wqe;
> 		uint8_t *dseg;
> 		uint8x16_t ctrl;
> +		rte_be32_t metadata =
> +			metadata_ol && (buf->ol_flags & PKT_TX_METADATA) ?
> +			buf->tx_metadata : 0;
> 
> 		assert(segs_n);
> 		max_elts = elts_n - (elts_head - txq->elts_tail);
> @@ -164,9 +169,10 @@
> 		ctrl = vqtbl1q_u8(ctrl, ctrl_shuf_m);
> 		vst1q_u8((void *)t_wqe, ctrl);
> 		/* Fill ESEG in the header. */
> -		vst1q_u16((void *)(t_wqe + 1),
> -			  ((uint16x8_t) { 0, 0, cs_flags, rte_cpu_to_be_16(len),
> -					  0, 0, 0, 0 }));
> +		vst1q_u32((void *)(t_wqe + 1),
> +			  ((uint32x4_t){ 0,
> +					 cs_flags << 16 | rte_cpu_to_be_16(len),
> +					 metadata, 0 }));
> 		txq->wqe_ci = wqe_ci;
> 	}
> 	if (!n)
> diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_sse.h b/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
> index 14117c4..fb384ef 100644
> --- a/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
> +++ b/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
> @@ -104,6 +104,8 @@
> 		sizeof(struct mlx5_wqe) / MLX5_WQE_DWORD_SIZE;
> 	unsigned int n;
> 	volatile struct mlx5_wqe *wqe = NULL;
> +	bool metadata_ol =
> +		txq->offloads & DEV_TX_OFFLOAD_MATCH_METADATA ? true : false;
> 
> 	assert(elts_n > pkts_n);
> 	mlx5_tx_complete(txq);
> @@ -125,6 +127,9 @@
> 		uint16_t max_wqe;
> 		__m128i *t_wqe, *dseg;
> 		__m128i ctrl;
> +		rte_be32_t metadata =
> +			metadata_ol && (buf->ol_flags & PKT_TX_METADATA) ?
> +			buf->tx_metadata : 0;
> 
> 		assert(segs_n);
> 		max_elts = elts_n - (elts_head - txq->elts_tail);
> @@ -165,9 +170,9 @@
> 		_mm_store_si128(t_wqe, ctrl);
> 		/* Fill ESEG in the header. */
> 		_mm_store_si128(t_wqe + 1,
> -				_mm_set_epi16(0, 0, 0, 0,
> -					      rte_cpu_to_be_16(len), cs_flags,
> -					      0, 0));
> +				_mm_set_epi32(0, metadata,
> +					      (rte_cpu_to_be_16(len) << 16) |
> +					      cs_flags, 0));
> 		txq->wqe_ci = wqe_ci;
> 	}
> 	if (!n)
> -- 
> 1.8.3.1
>