ixgbe: add E610 implementation of FW recovery mode

Add E610 implementation of fw_recovery_mode MAC operation.

In case of E610 information about recovery mode is obtained
from FW_MODES field in IXGBE_GL_MNG_FWSM register (0x000B6134).

Introduce recovery specific probing flow and init only
vital features.

User should be able to perform NVM update using devlink
once FW error is detected in order to load a healthy img.

Reviewed-by: Mateusz Polchlopek <mateusz.polchlopek@intel.com>
Co-developed-by: Stefan Wegrzyn <stefan.wegrzyn@intel.com>
Signed-off-by: Stefan Wegrzyn <stefan.wegrzyn@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Bharath R <bharath.r@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 84 insertions, 10 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 84ee481a0ce1..1c69f58466fd 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -8427,6 +8427,18 @@ static bool ixgbe_check_fw_error(struct ixgbe_adapter *adapter)
 	return false;
 }
 
+static void ixgbe_recovery_service_task(struct work_struct *work)
+{
+	struct ixgbe_adapter *adapter = container_of(work,
+						     struct ixgbe_adapter,
+						     service_task);
+
+	ixgbe_handle_fw_event(adapter);
+	ixgbe_service_event_complete(adapter);
+
+	mod_timer(&adapter->service_timer, jiffies + msecs_to_jiffies(100));
+}
+
 /**
  * ixgbe_service_task - manages and runs subtasks
  * @work: pointer to work_struct containing our data
@@ -8446,8 +8458,13 @@ static void ixgbe_service_task(struct work_struct *work)
 		return;
 	}
 	if (ixgbe_check_fw_error(adapter)) {
-		if (!test_bit(__IXGBE_DOWN, &adapter->state))
+		if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
+			if (adapter->mii_bus) {
+				mdiobus_unregister(adapter->mii_bus);
+				adapter->mii_bus = NULL;
+			}
 			unregister_netdev(adapter->netdev);
+		}
 		ixgbe_service_event_complete(adapter);
 		return;
 	}
@@ -11233,6 +11250,65 @@ static void ixgbe_set_fw_version(struct ixgbe_adapter *adapter)
 }
 
 /**
+ * ixgbe_recovery_probe - Handle FW recovery mode during probe
+ * @adapter: the adapter private structure
+ *
+ * Perform limited driver initialization when FW error is detected.
+ *
+ * Return: 0 on successful probe for E610, -EIO if recovery mode is detected
+ * for non-E610 adapter, error status code on any other case.
+ */
+static int ixgbe_recovery_probe(struct ixgbe_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	struct pci_dev *pdev = adapter->pdev;
+	struct ixgbe_hw *hw = &adapter->hw;
+	bool disable_dev;
+	int err = -EIO;
+
+	if (hw->mac.type != ixgbe_mac_e610)
+		goto clean_up_probe;
+
+	ixgbe_get_hw_control(adapter);
+	mutex_init(&hw->aci.lock);
+	err = ixgbe_get_flash_data(&adapter->hw);
+	if (err)
+		goto shutdown_aci;
+
+	timer_setup(&adapter->service_timer, ixgbe_service_timer, 0);
+	INIT_WORK(&adapter->service_task, ixgbe_recovery_service_task);
+	set_bit(__IXGBE_SERVICE_INITED, &adapter->state);
+	clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
+
+	if (hw->mac.ops.get_bus_info)
+		hw->mac.ops.get_bus_info(hw);
+
+	pci_set_drvdata(pdev, adapter);
+	/* We are creating devlink interface so NIC can be managed,
+	 * e.g. new NVM image loaded
+	 */
+	devl_lock(adapter->devlink);
+	ixgbe_devlink_register_port(adapter);
+	SET_NETDEV_DEVLINK_PORT(adapter->netdev,
+				&adapter->devlink_port);
+	devl_register(adapter->devlink);
+	devl_unlock(adapter->devlink);
+
+	return 0;
+shutdown_aci:
+	mutex_destroy(&adapter->hw.aci.lock);
+	ixgbe_release_hw_control(adapter);
+	devlink_free(adapter->devlink);
+clean_up_probe:
+	disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
+	free_netdev(netdev);
+	pci_release_mem_regions(pdev);
+	if (disable_dev)
+		pci_disable_device(pdev);
+	return err;
+}
+
+/**
  * ixgbe_probe - Device Initialization Routine
  * @pdev: PCI device information struct
  * @ent: entry in ixgbe_pci_tbl
@@ -11370,6 +11446,13 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (err)
 		goto err_sw_init;
 
+	/* Make sure the SWFW semaphore is in a valid state */
+	if (hw->mac.ops.init_swfw_sync)
+		hw->mac.ops.init_swfw_sync(hw);
+
+	if (ixgbe_check_fw_error(adapter))
+		return ixgbe_recovery_probe(adapter);
+
 	if (adapter->hw.mac.type == ixgbe_mac_e610) {
 		err = ixgbe_get_caps(&adapter->hw);
 		if (err)
@@ -11396,10 +11479,6 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		break;
 	}
 
-	/* Make sure the SWFW semaphore is in a valid state */
-	if (hw->mac.ops.init_swfw_sync)
-		hw->mac.ops.init_swfw_sync(hw);
-
 	/* Make it possible the adapter to be woken up via WOL */
 	switch (adapter->hw.mac.type) {
 	case ixgbe_mac_82599EB:
@@ -11552,11 +11631,6 @@ skip_sriov:
 	if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
 		netdev->features |= NETIF_F_LRO;
 
-	if (ixgbe_check_fw_error(adapter)) {
-		err = -EIO;
-		goto err_sw_init;
-	}
-
 	/* make sure the EEPROM is good */
 	if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
 		e_dev_err("The EEPROM Checksum Is Not Valid\n");