[v3] net/i40e: add Tx preparation for simple Tx data path

  Introduce i40e_simple_prep_pkts() as the preparation function for
simple Tx data path, as it's for sanity check for simple Tx.

Suggested-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Signed-off-by: Leyi Rong <leyi.rong@intel.com>
---
 drivers/net/i40e/i40e_rxtx.c | 39 +++++++++++++++++++++++++++++++++++-
 drivers/net/i40e/i40e_rxtx.h |  2 ++
 2 files changed, 40 insertions(+), 1 deletion(-)
  

> Introduce i40e_simple_prep_pkts() as the preparation function for
> simple Tx data path, as it's for sanity check for simple Tx.
> 
> Suggested-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Signed-off-by: Leyi Rong <leyi.rong@intel.com>
> ---
>  drivers/net/i40e/i40e_rxtx.c | 39 +++++++++++++++++++++++++++++++++++-
>  drivers/net/i40e/i40e_rxtx.h |  2 ++
>  2 files changed, 40 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
> index 3c7686c3f4..86a9eae370 100644
> --- a/drivers/net/i40e/i40e_rxtx.c
> +++ b/drivers/net/i40e/i40e_rxtx.c
> @@ -1479,6 +1479,43 @@ i40e_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
>  	return nb_tx;
>  }
> 
> +/*********************************************************************
> + *
> + *  TX simple prep functions
> + *
> + **********************************************************************/
> +uint16_t
> +i40e_simple_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
> +		      uint16_t nb_pkts)
> +{
> +	int i;
> +	uint64_t ol_flags;
> +	struct rte_mbuf *m;
> +
> +	for (i = 0; i < nb_pkts; i++) {
> +		m = tx_pkts[i];
> +		ol_flags = m->ol_flags;
> +
> +		if (m->nb_segs != 1) {
> +			rte_errno = EINVAL;
> +			return i;
> +		}
> +
> +		if (ol_flags & PKT_TX_OFFLOAD_MASK) {
> +			rte_errno = ENOTSUP;
> +			return i;
> +		}
> +
> +		/* check the size of packet */
> +		if (m->pkt_len < I40E_TX_MIN_PKT_LEN ||
> +		    m->pkt_len > I40E_FRAME_SIZE_MAX) {
> +			rte_errno = EINVAL;
> +			return i;
> +		}
> +	}
> +	return i;
> +}
> +
>  /*********************************************************************
>   *
>   *  TX prep functions
> @@ -3412,7 +3449,7 @@ i40e_set_tx_function(struct rte_eth_dev *dev)
>  			PMD_INIT_LOG(DEBUG, "Simple tx finally be used.");
>  			dev->tx_pkt_burst = i40e_xmit_pkts_simple;
>  		}
> -		dev->tx_pkt_prepare = NULL;
> +		dev->tx_pkt_prepare = i40e_simple_prep_pkts;
>  	} else {
>  		PMD_INIT_LOG(DEBUG, "Xmit tx finally be used.");
>  		dev->tx_pkt_burst = i40e_xmit_pkts;
> diff --git a/drivers/net/i40e/i40e_rxtx.h b/drivers/net/i40e/i40e_rxtx.h
> index 3447a58c82..5ccf5773e8 100644
> --- a/drivers/net/i40e/i40e_rxtx.h
> +++ b/drivers/net/i40e/i40e_rxtx.h
> @@ -208,6 +208,8 @@ uint16_t i40e_recv_scattered_pkts(void *rx_queue,
>  uint16_t i40e_xmit_pkts(void *tx_queue,
>  			struct rte_mbuf **tx_pkts,
>  			uint16_t nb_pkts);
> +uint16_t i40e_simple_prep_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
> +			       uint16_t nb_pkts);
>  uint16_t i40e_prep_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
>  		uint16_t nb_pkts);
>  int i40e_tx_queue_init(struct i40e_tx_queue *txq);
> --

Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

> 2.17.1
  

> -----Original Message-----
> From: Ananyev, Konstantin <konstantin.ananyev@intel.com>
> Sent: Tuesday, April 20, 2021 4:03 PM
> To: Rong, Leyi <leyi.rong@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
> Cc: dev@dpdk.org
> Subject: RE: [PATCH v3] net/i40e: add Tx preparation for simple Tx data path
> 
> 
> > Introduce i40e_simple_prep_pkts() as the preparation function for
> > simple Tx data path, as it's for sanity check for simple Tx.
> >
> > Suggested-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> > Signed-off-by: Leyi Rong <leyi.rong@intel.com>

Applied to dpdk-next-net-intel.

Thanks
Qi