[PATCH v3] app/testpmd: fix DCB in VT configuration

[Singh, Aman Deep]

On 11/15/2021 8:59 AM, Jie Wang wrote:
> When set port DCB in VT mode enabled, it should remove RSS HASH
> offload before reconfiguring the device and queues.
>
> Because port multi-queue mode is changed from RSS to DCB in VT.
>
> Fixes: 2a977b891f99 ("app/testpmd: fix DCB configuration")
>
> Signed-off-by: Jie Wang<jie1x.wang at intel.com>

Acked-by: Aman Deep Singh <aman.deep.singh at intel.com>

> ---
> v3:
>   * update commit log.
>   * remove RSS HASh offload from DCB in VT.
> v2:
>   * update commit log.
>   * remove RSS HASH offload from port->rx_conf[i].offloads.
> ---
>   app/test-pmd/testpmd.c | 7 +++++++
>   1 file changed, 7 insertions(+)
>
> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
> index a66dfb297c..c18942279a 100644
> --- a/app/test-pmd/testpmd.c
> +++ b/app/test-pmd/testpmd.c
> @@ -3948,6 +3948,13 @@ init_port_dcb_config(portid_t pid,
>   	if (retval < 0)
>   		return retval;
>   	port_conf.rxmode.offloads |= RTE_ETH_RX_OFFLOAD_VLAN_FILTER;
> +	/* remove RSS HASH offload for DCB in vt mode */
> +	if (port_conf.rxmode.mq_mode == RTE_ETH_MQ_RX_VMDQ_DCB) {
> +		port_conf.rxmode.offloads &= ~RTE_ETH_RX_OFFLOAD_RSS_HASH;
> +		for (i = 0; i < nb_rxq; i++)
> +			rte_port->rx_conf[i].offloads &=
> +				~RTE_ETH_RX_OFFLOAD_RSS_HASH;
> +	}
>   
>   	/* re-configure the device . */
>   	retval = rte_eth_dev_configure(pid, nb_rxq, nb_rxq, &port_conf);
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