[dpdk-dev] [PATCH v2] net/i40e: i40evf exposes LSC flag to application

[SteveX Yang]

When PF event VIRTCHNL_EVENT_LINK_CHANGE received, i40evf need update
the link status and issue RTE_ETH_EVENT_INTR_LSC via rte ether device
callback function.

Signed-off-by: SteveX Yang <stevex.y...@intel.com>
---
v2:
  - add RTE_PCI_DRV_INTR_LSC in drv_flags
  - configure the intr_conf.lsc according to RTE_ETH_EVENT_INTR_LSC
  - update i40e_vf.ini

---
 doc/guides/nics/features/i40e_vf.ini |  1 +
 drivers/net/i40e/i40e_ethdev_vf.c    | 12 +++++++++---
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/doc/guides/nics/features/i40e_vf.ini 
b/doc/guides/nics/features/i40e_vf.ini
index 9f95063d2..4984a6177 100644
--- a/doc/guides/nics/features/i40e_vf.ini
+++ b/doc/guides/nics/features/i40e_vf.ini
@@ -6,6 +6,7 @@
 [Features]
 Rx interrupt         = Y
 Link status          = Y
+Link status event    = Y
 Fast mbuf free       = P
 Queue start/stop     = Y
 Jumbo frame          = Y
diff --git a/drivers/net/i40e/i40e_ethdev_vf.c 
b/drivers/net/i40e/i40e_ethdev_vf.c
index 69cab8e73..b4e42939e 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1381,13 +1381,16 @@ i40evf_handle_pf_event(struct rte_eth_dev *dev, uint8_t 
*msg,
        switch (pf_msg->event) {
        case VIRTCHNL_EVENT_RESET_IMPENDING:
                PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_RESET_IMPENDING event");
-               _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET,
-                                             NULL);
+               _rte_eth_dev_callback_process(dev,
+                               RTE_ETH_EVENT_INTR_RESET, NULL);
                break;
        case VIRTCHNL_EVENT_LINK_CHANGE:
                PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_LINK_CHANGE event");
                vf->link_up = pf_msg->event_data.link_event.link_status;
                vf->link_speed = pf_msg->event_data.link_event.link_speed;
+               i40evf_dev_link_update(dev, 0);
+               _rte_eth_dev_callback_process(dev,
+                               RTE_ETH_EVENT_INTR_LSC, NULL);
                break;
        case VIRTCHNL_EVENT_PF_DRIVER_CLOSE:
                PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_PF_DRIVER_CLOSE event");
@@ -1609,7 +1612,7 @@ static int eth_i40evf_pci_remove(struct rte_pci_device 
*pci_dev)
  */
 static struct rte_pci_driver rte_i40evf_pmd = {
        .id_table = pci_id_i40evf_map,
-       .drv_flags = RTE_PCI_DRV_NEED_MAPPING,
+       .drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC,
        .probe = eth_i40evf_pci_probe,
        .remove = eth_i40evf_pci_remove,
 };
@@ -1635,6 +1638,9 @@ i40evf_dev_configure(struct rte_eth_dev *dev)
        ad->tx_simple_allowed = true;
        ad->tx_vec_allowed = true;
 
+       dev->data->dev_conf.intr_conf.lsc =
+               !!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC);
+
        if (num_queue_pairs > vf->vsi_res->num_queue_pairs) {
                struct i40e_hw *hw;
                int ret;
-- 
2.17.1