[v2,08/17] net/fm10k: add checks for max SIMD bitwidth

  When choosing a vector path to take, an extra condition must be
satisfied to ensure the max SIMD bitwidth allows for the CPU enabled
path.

Cc: Qi Zhang <qi.z.zhang@intel.com>
Cc: Xiao Wang <xiao.w.wang@intel.com>

Signed-off-by: Ciara Power <ciara.power@intel.com>
---
 drivers/net/fm10k/fm10k_ethdev.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)
  

Hi Ciara,

BRs,
Xiao

> -----Original Message-----
> From: Power, Ciara <ciara.power@intel.com>
> Sent: Friday, August 28, 2020 12:13 AM
> To: dev@dpdk.org
> Cc: Power, Ciara <ciara.power@intel.com>; Zhang, Qi Z
> <qi.z.zhang@intel.com>; Wang, Xiao W <xiao.w.wang@intel.com>
> Subject: [PATCH v2 08/17] net/fm10k: add checks for max SIMD bitwidth
> 
> When choosing a vector path to take, an extra condition must be
> satisfied to ensure the max SIMD bitwidth allows for the CPU enabled
> path.
> 
> Cc: Qi Zhang <qi.z.zhang@intel.com>
> Cc: Xiao Wang <xiao.w.wang@intel.com>
> 
> Signed-off-by: Ciara Power <ciara.power@intel.com>
> ---
>  drivers/net/fm10k/fm10k_ethdev.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/fm10k/fm10k_ethdev.c
> b/drivers/net/fm10k/fm10k_ethdev.c
> index b574693bca..f7c41d4377 100644
> --- a/drivers/net/fm10k/fm10k_ethdev.c
> +++ b/drivers/net/fm10k/fm10k_ethdev.c
> @@ -2937,7 +2937,9 @@ fm10k_set_tx_function(struct rte_eth_dev *dev)
>  	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
>  		/* primary process has set the ftag flag and offloads */
>  		txq = dev->data->tx_queues[0];
> -		if (fm10k_tx_vec_condition_check(txq)) {
> +		if (fm10k_tx_vec_condition_check(txq) ||
> +				rte_get_max_simd_bitwidth()
> +				< RTE_MAX_128_SIMD) {
>  			dev->tx_pkt_burst = fm10k_xmit_pkts;
>  			dev->tx_pkt_prepare = fm10k_prep_pkts;
>  			PMD_INIT_LOG(DEBUG, "Use regular Tx func");
> @@ -2956,7 +2958,8 @@ fm10k_set_tx_function(struct rte_eth_dev *dev)
>  		txq = dev->data->tx_queues[i];
>  		txq->tx_ftag_en = tx_ftag_en;
>  		/* Check if Vector Tx is satisfied */
> -		if (fm10k_tx_vec_condition_check(txq))
> +		if (fm10k_tx_vec_condition_check(txq) ||
> +				rte_get_max_simd_bitwidth() <
> RTE_MAX_128_SIMD)
>  			use_sse = 0;
>  	}
> 
> @@ -2990,7 +2993,9 @@ fm10k_set_rx_function(struct rte_eth_dev *dev)
>  	 * conditions to be met.
>  	 */
>  	if (!fm10k_rx_vec_condition_check(dev) &&
> -			dev_info->rx_vec_allowed && !rx_ftag_en) {
> +			dev_info->rx_vec_allowed && !rx_ftag_en &&
> +				rte_get_max_simd_bitwidth()
> +				>= RTE_MAX_128_SIMD) {
>  		if (dev->data->scattered_rx)
>  			dev->rx_pkt_burst = fm10k_recv_scattered_pkts_vec;
>  		else
> --
> 2.17.1

Acked-by: Xiao Wang <xiao.w.wang@intel.com>

Thanks~