i40e: add VEB switching support

VEB switching feature for i40e is used to enable the switching between the
VSIs connect to the virtual bridge. The old implementation is setting the
virtual bridge mode as VEPA which is port aggregation. Enable the switching
ability by setting the loop back mode for the specific VSIs which connect
to PF or VFs.

VEB/VSI/VEPA are concepts not specific to the i40e HW, the concepts are
from 802.1qbg spec
IEEE EVB tutorial:
http://www.ieee802.org/802_tutorials/2009-11/evb-tutorial-draft-20091116_v09.pdf

VEB: a virtual switch can forward the packet based on the specific match
field.
VSI: a virtual interface connect between the VEB/VEPA and virtual machine.
VEPA: a virtual Ethernet port aggregator will upstream the packets from
VSI to the LAN port.

Signed-off-by: Zhe Tao <zhe.tao@intel.com>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>

diff --git a/doc/guides/rel_notes/release_16_04.rst b/doc/guides/rel_notes/release_16_04.rst
index 61bbde9..b5da7ca 100644 (file)
--- a/doc/guides/rel_notes/release_16_04.rst
+++ b/doc/guides/rel_notes/release_16_04.rst
@@ -150,6 +150,8 @@ This section should contain new features added in this release. Sample format:
 
   Added support for DCB in VMDQ mode to i40e driver.
 
+* **Added i40e VEB switching support.**
+
 * **Increased number of next hops for LPM IPv4 to 2^24.**
 
   The next_hop field is extended from 8 bits to 24 bits for IPv4.

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index e7214e1..478ad78 100644 (file)
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -3904,6 +3904,45 @@ i40e_vsi_get_bw_config(struct i40e_vsi *vsi)
        return I40E_SUCCESS;
 }
 
+/* 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;
+
+       /* Use the FW API if FW >= v5.0 */
+       if (hw->aq.fw_maj_ver < 5) {
+               PMD_INIT_LOG(ERR, "FW < v5.0, cannot enable loopback");
+               return;
+       }
+
+       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, "cannot 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,
@@ -3939,6 +3978,8 @@ 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);
@@ -4111,14 +4152,14 @@ i40e_vsi_setup(struct i40e_pf *pf,
                ctxt.connection_type = 0x1;
                ctxt.flags = I40E_AQ_VSI_TYPE_VF;
 
-               /**
-                * Do not configure switch ID to enable VEB switch by
-                * I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB. Because in Fortville,
-                * if the source mac address of packet sent from VF is not
-                * listed in the VEB's mac table, the VEB will switch the
-                * packet back to the VF. Need to enable it when HW issue
-                * is fixed.
-                */
+               /* Use the VEB configuration if FW >= v5.0 */
+               if (hw->aq.fw_maj_ver >= 5) {
+                       /* Configure switch ID */
+                       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);
+               }
 
                /* Configure port/vlan */
                ctxt.info.valid_sections |=