[dpdk-dev] [PATCH] net/mlx5: return RSS hash result in mbuf

[Adrien Mazarguil]

On Wed, Sep 14, 2016 at 10:16:05AM +0200, Nelio Laranjeiro wrote:
> Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro at 6wind.com>

Acked-by: Adrien Mazarguil <adrien.mazarguil at 6wind.com>

> ---
>  drivers/net/mlx5/mlx5_rxq.c  | 1 +
>  drivers/net/mlx5/mlx5_rxtx.c | 6 +++++-
>  drivers/net/mlx5/mlx5_rxtx.h | 2 ++
>  3 files changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
> index f6f4315..65c264b 100644
> --- a/drivers/net/mlx5/mlx5_rxq.c
> +++ b/drivers/net/mlx5/mlx5_rxq.c
> @@ -926,6 +926,7 @@ rxq_ctrl_setup(struct rte_eth_dev *dev, struct rxq_ctrl *rxq_ctrl,
>  		.rxq = {
>  			.elts_n = log2above(desc),
>  			.mp = mp,
> +			.rss_hash = !!(priv->rxqs_n > 1),
>  		},
>  	};
>  	struct ibv_exp_wq_attr mod;
> diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
> index b91b644..17ae5e4 100644
> --- a/drivers/net/mlx5/mlx5_rxtx.c
> +++ b/drivers/net/mlx5/mlx5_rxtx.c
> @@ -1338,12 +1338,16 @@ mlx5_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
>  			/* Update packet information. */
>  			pkt->packet_type = 0;
>  			pkt->ol_flags = 0;
> +			if (rxq->rss_hash) {
> +				pkt->hash.rss = ntohl(cqe->rx_hash_res);
> +				pkt->ol_flags = PKT_RX_RSS_HASH;
> +			}
>  			if (rxq->csum | rxq->csum_l2tun | rxq->vlan_strip |
>  			    rxq->crc_present) {
>  				if (rxq->csum) {
>  					pkt->packet_type =
>  						rxq_cq_to_pkt_type(cqe);
> -					pkt->ol_flags =
> +					pkt->ol_flags |=
>  						rxq_cq_to_ol_flags(rxq, cqe);
>  				}
>  				if (cqe->l4_hdr_type_etc &
> diff --git a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h
> index 9828aef..e813f38 100644
> --- a/drivers/net/mlx5/mlx5_rxtx.h
> +++ b/drivers/net/mlx5/mlx5_rxtx.h
> @@ -113,6 +113,8 @@ struct rxq {
>  	unsigned int cqe_n:4; /* Log 2 of CQ elements. */
>  	unsigned int elts_n:4; /* Log 2 of Mbufs. */
>  	unsigned int port_id:8;
> +	unsigned int rss_hash:1; /* RSS hash result is enabled. */
> +	unsigned int :9; /* Remaining bits. */
>  	volatile uint32_t *rq_db;
>  	volatile uint32_t *cq_db;
>  	uint16_t rq_ci;
> -- 
> 2.1.4
> 

-- 
Adrien Mazarguil
6WIND