[dpdk-dev] [PATCH v2] net/i40e: adjust the RSS table

[Zhang, Qi Z]

minor captures inline

Otherwise
Acked-by: Qi Zhang <qi.z.zhang at intel.com>

> -----Original Message-----
> From: Li, Xiaoyun
> Sent: Monday, December 3, 2018 2:59 PM
> To: Zhang, Qi Z <qi.z.zhang at intel.com>
> Cc: dev at dpdk.org; Li, Xiaoyun <xiaoyun.li at intel.com>
> Subject: [PATCH v2] net/i40e: adjust the RSS table
> 
> When starting the device, the RSS table is initialized. So the RSS update before
> device_start would be overwitten. This patch allows users to update the RSS

s/ overwitten /overwritten

> reta table before device_start and adjusts the order to set entries sequentially.

> 
> Signed-off-by: Xiaoyun Li <xiaoyun.li at intel.com>




> ---
> v2:
>  * Adds support to update RSS table before device_start.
>  * Simplify the codes with rte_bswap32.
>  * Polish the commit log.
> ---
>  drivers/net/i40e/i40e_ethdev.c | 21 ++++++++++++++-------
> drivers/net/i40e/i40e_ethdev.h |  3 +++
>  2 files changed, 17 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
> index 552a7a5..fea42b0 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -2444,6 +2444,8 @@ i40e_dev_stop(struct rte_eth_dev *dev)
>  	pf->tm_conf.committed = false;
> 
>  	hw->adapter_stopped = 1;


> +
> +	pf->adapter->is_rss_reta_update = 0;

How about rename to rss_reta_updated?

>  }
> 
>  static void
> @@ -4255,6 +4257,8 @@ i40e_dev_rss_reta_update(struct rte_eth_dev *dev,
>  	}
>  	ret = i40e_set_rss_lut(pf->main_vsi, lut, reta_size);
> 
> +	pf->adapter->is_rss_reta_update = 1;
> +
>  out:
>  	rte_free(lut);
> 
> @@ -8492,13 +8496,16 @@ i40e_pf_config_rss(struct i40e_pf *pf)
>  		return -ENOTSUP;
>  	}
> 
> -	for (i = 0, j = 0; i < hw->func_caps.rss_table_size; i++, j++) {
> -		if (j == num)
> -			j = 0;
> -		lut = (lut << 8) | (j & ((0x1 <<
> -			hw->func_caps.rss_table_entry_width) - 1));
> -		if ((i & 3) == 3)
> -			I40E_WRITE_REG(hw, I40E_PFQF_HLUT(i >> 2), lut);
> +	if (pf->adapter->is_rss_reta_update == 0) {
> +		for (i = 0, j = 0; i < hw->func_caps.rss_table_size; i++, j++) {
> +			if (j == num)
> +				j = 0;
> +			lut = (lut << 8) | (j & ((0x1 <<
> +				hw->func_caps.rss_table_entry_width) - 1));
> +			if ((i & 3) == 3)
> +				I40E_WRITE_REG(hw, I40E_PFQF_HLUT(i >> 2),
> +					       rte_bswap32(lut));
> +		}
>  	}
> 
>  	rss_conf = pf->dev_data->dev_conf.rx_adv_conf.rss_conf;
> diff --git a/drivers/net/i40e/i40e_ethdev.h b/drivers/net/i40e/i40e_ethdev.h
> index 11ecfc3..854aada 100644
> --- a/drivers/net/i40e/i40e_ethdev.h
> +++ b/drivers/net/i40e/i40e_ethdev.h
> @@ -1081,6 +1081,9 @@ struct i40e_adapter {
> 
>  	/* For devargs */
>  	uint8_t use_latest_vec;
> +
> +	/* For RSS reta table update */
> +	uint8_t is_rss_reta_update;


>  };
> 
>  /**
> --
> 2.7.4