Re: [dpdk-dev] [PATCH 2/2] i40e: enable internal switch of pf

["Qiu, Michael" <michael.qiu@intel.com>]

On 1/29/2015 9:42 AM, Jingjing Wu wrote:
> This patch enables PF's internal switch by setting ALLOWLOOPBACK
> flag when VEB is created. With this patch, traffic from PF can be
> switched on the VEB.
>
> Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
> ---
>  lib/librte_pmd_i40e/i40e_ethdev.c | 36 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 36 insertions(+)
>
> diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c b/lib/librte_pmd_i40e/i40e_ethdev.c
> index fe758c2..94fd36c 100644
> --- a/lib/librte_pmd_i40e/i40e_ethdev.c
> +++ b/lib/librte_pmd_i40e/i40e_ethdev.c
> @@ -2854,6 +2854,40 @@ i40e_vsi_dump_bw_config(struct i40e_vsi *vsi)
>  	return 0;
>  }
>  
> +/*
> + * i40e_enable_pf_lb
> + * @pf: pointer to the pf structure
> + *
> + * allow loopback on pf
> + */
> +static inline void
> +i40e_enable_pf_lb(struct i40e_pf *pf)
> +{
> +	struct i40e_hw *hw = I40E_PF_TO_HW(pf);
> +	struct i40e_vsi_context ctxt;
> +	int ret;
> +
> +	memset(&ctxt, 0, sizeof(ctxt));
> +	ctxt.seid = pf->main_vsi_seid;
> +	ctxt.pf_num = hw->pf_id;
> +	ret = i40e_aq_get_vsi_params(hw, &ctxt, NULL);
> +	if (ret) {
> +		PMD_DRV_LOG(ERR, "couldn't get pf vsi config, err %d, aq_err %d",
> +			ret, hw->aq.asq_last_status);
> +		return;
> +	}
> +	ctxt.flags = I40E_AQ_VSI_TYPE_PF;
> +	ctxt.info.valid_sections =
> +		rte_cpu_to_le_16(I40E_AQ_VSI_PROP_SWITCH_VALID);

Here does it need to be "|=" ? As ctxt.infowill be filled in
i40e_aq_get_vsi_params(), I don't know if it has other issue for
override this filled by "=".

Thanks,
Michael
> +	ctxt.info.switch_id |=
> +		rte_cpu_to_le_16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
> +
> +	ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
> +	if (ret)
> +		PMD_DRV_LOG(ERR, "update vsi switch failed, aq_err=%d\n",
> +			hw->aq.asq_last_status);
> +}
> +
>  /* Setup a VSI */
>  struct i40e_vsi *
>  i40e_vsi_setup(struct i40e_pf *pf,
> @@ -2889,6 +2923,8 @@ i40e_vsi_setup(struct i40e_pf *pf,
>  			PMD_DRV_LOG(ERR, "VEB setup failed");
>  			return NULL;
>  		}
> +		/* set ALLOWLOOPBACk on pf, when veb is created */
> +		i40e_enable_pf_lb(pf);
>  	}
>  
>  	vsi = rte_zmalloc("i40e_vsi", sizeof(struct i40e_vsi), 0);