i40e: enable internal switch of PF

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.

Test report: http://www.dpdk.org/ml/archives/dev/2015-February/013237.html

Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
Acked-by: Jijiang Liu <jijiang.liu@intel.com>
Tested-by: Min Cao <min.cao@intel.com>

diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c b/lib/librte_pmd_i40e/i40e_ethdev.c
index 6f24ee5..85e8315 100644 (file)
--- a/lib/librte_pmd_i40e/i40e_ethdev.c
+++ b/lib/librte_pmd_i40e/i40e_ethdev.c
@@ -2870,6 +2870,40 @@ 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);
+       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,
@@ -2905,6 +2939,8 @@ 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);