[dpdk-dev] [PATCH v14 2/7] ethdev: add mbuf RSS update as an offload

[Andrew Rybchenko]

On 10/29/19 8:03 AM, pbhagavatula at marvell.com wrote:
> From: Pavan Nikhilesh <pbhagavatula at marvell.com>
>
> Add new Rx offload flag `DEV_RX_OFFLOAD_RSS_HASH` which can be used to
> enable/disable PMDs write to `rte_mbuf::hash::rss`.
> PMDs notify the validity of `rte_mbuf::hash:rss` to the applcation
> by enabling `PKT_RX_RSS_HASH ` flag in `rte_mbuf::ol_flags`.
>
> Signed-off-by: Pavan Nikhilesh <pbhagavatula at marvell.com>
> Reviewed-by: Andrew Rybchenko <arybchenko at solarflare.com>

[snip]

> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
> index 6ce8f5e75..fef1dbb61 100644

[snip]

> @@ -1303,6 +1304,16 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
>   		goto rollback;
>   	}
>   
> +	/* Check if Rx*/
> +	if ((dev_conf->rxmode.mq_mode & ETH_MQ_RX_NONE) &&

ETH_MQ_RX_NONE is 0 so above condition is always false.
It should be
if ((dev_conf->rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG) == 0 &&

> +	    (dev_conf->rxmode.offloads & DEV_RX_OFFLOAD_RSS_HASH)) {
> +		RTE_ETHDEV_LOG(ERR,
> +			"Ethdev port_id=%u config invalid mq_mode %s with offloads %s\n",
> +			port_id, "ETH_MQ_RX_NONE", "DEV_RX_OFFLOAD_RSS_HASH");

I think the error message is a bit misleading. It should be:

"Ethdev port_id=%u config invalid mq_mode without RSS but %s offload is requested\n"

rte_eth_dev_rx_offload_name(DEV_RX_OFFLOAD_RSS_HASH) should be used
to log offload name.

> +		ret = -EINVAL;
> +		goto rollback;
> +	}
> +
>   	/*
>   	 * Setup new number of RX/TX queues and reconfigure device.
>   	 */

[snip]