[dpdk-dev] [PATCH v2 3/4] net/fm10k: support switch restart on VF

[Xiao Wang]

For events indicating a change in the state of the switch manager, the
driver will restore the basic port configurations and then pass this event
to application so that the application can restore any additional
configurations if required. In this way, once the switch manager restarts,
the DPDK application can resume its network.

Signed-off-by: Xiao Wang <xiao.w.wang at intel.com>
---
v2:
- Remove unnecessary parentheses.
---
 drivers/net/fm10k/fm10k_ethdev.c | 41 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index c71c0fc..d0dfc14 100644
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -2670,6 +2670,11 @@ static void fm10k_MAC_filter_set(struct rte_eth_dev *dev,
 {
 	struct rte_eth_dev *dev = (struct rte_eth_dev *)param;
 	struct fm10k_hw *hw = FM10K_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	struct fm10k_mbx_info *mbx = &hw->mbx;
+	struct fm10k_dev_info *dev_info =
+		FM10K_DEV_PRIVATE_TO_INFO(dev->data->dev_private);
+	const enum fm10k_mbx_state state = mbx->state;
+	int status_mbx;
 
 	if (hw->mac.type != fm10k_mac_vf)
 		return;
@@ -2679,6 +2684,42 @@ static void fm10k_MAC_filter_set(struct rte_eth_dev *dev,
 	hw->mbx.ops.process(hw, &hw->mbx);
 	fm10k_mbx_unlock(hw);
 
+	if (state == FM10K_STATE_OPEN && mbx->state == FM10K_STATE_CONNECT) {
+		PMD_INIT_LOG(INFO, "INT: Switch has gone down");
+
+		fm10k_mbx_lock(hw);
+		hw->mac.ops.update_lport_state(hw, hw->mac.dglort_map, MAX_LPORT_NUM, 1);
+		fm10k_mbx_unlock(hw);
+
+		/* Setting reset flag */
+		dev_info->sm_down = 1;
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, NULL);
+	}
+
+	if (dev_info->sm_down == 1 && hw->mac.dglort_map == FM10K_DGLORTMAP_ZERO) {
+		PMD_INIT_LOG(INFO, "INT: Switch has gone up");
+		fm10k_mbx_lock(hw);
+		status_mbx = hw->mac.ops.update_xcast_mode(hw, hw->mac.dglort_map,
+				FM10K_XCAST_MODE_NONE);
+		if (status_mbx != FM10K_SUCCESS)
+			PMD_INIT_LOG(ERR, "Failed to set XCAST mode");
+		fm10k_mbx_unlock(hw);
+
+		/* first clear the internal SW recording structure */
+		fm10k_vlan_filter_set(dev, hw->mac.default_vid, false);
+		fm10k_MAC_filter_set(dev, hw->mac.addr, false, MAIN_VSI_POOL_NUMBER);
+
+		/* Add default mac address and vlan for the logical ports that
+		 * have been created, leave to the application to fully recover
+		 * Rx filtering.
+		 */
+		fm10k_MAC_filter_set(dev, hw->mac.addr, true, MAIN_VSI_POOL_NUMBER);
+		fm10k_vlan_filter_set(dev, hw->mac.default_vid, true);
+
+		dev_info->sm_down = 0;
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, NULL);
+	}
+
 	/* Re-enable interrupt from device side */
 	FM10K_WRITE_REG(hw, FM10K_VFITR(0), FM10K_ITR_AUTOMASK |
 					FM10K_ITR_MASK_CLEAR);
-- 
1.8.3.1