ixgbe: firmware recovery mode

Add check for FW NVM recovery mode during driver initialization and
service task. If in recovery mode, log message and unregister device

Signed-off-by: Sebastian Basierski <sebastianx.basierski@intel.com>
Tested-by: Don Buchholz <donald.buchholz@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 9a23d33a47ed..604282f03d23 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -7775,6 +7775,33 @@ static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
 }
 
 /**
+ * ixgbe_check_fw_error - Check firmware for errors
+ * @adapter: the adapter private structure
+ *
+ * Check firmware errors in register FWSM
+ */
+static bool ixgbe_check_fw_error(struct ixgbe_adapter *adapter)
+{
+	struct ixgbe_hw *hw = &adapter->hw;
+	u32 fwsm;
+
+	/* read fwsm.ext_err_ind register and log errors */
+	fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));
+
+	if (fwsm & IXGBE_FWSM_EXT_ERR_IND_MASK ||
+	    !(fwsm & IXGBE_FWSM_FW_VAL_BIT))
+		e_dev_warn("Warning firmware error detected FWSM: 0x%08X\n",
+			   fwsm);
+
+	if (hw->mac.ops.fw_recovery_mode && hw->mac.ops.fw_recovery_mode(hw)) {
+		e_dev_err("Firmware recovery mode detected. Limiting functionality. Refer to the Intel(R) Ethernet Adapters and Devices User Guide for details on firmware recovery mode.\n");
+		return true;
+	}
+
+	return false;
+}
+
+/**
  * ixgbe_service_task - manages and runs subtasks
  * @work: pointer to work_struct containing our data
  **/
@@ -7792,6 +7819,15 @@ static void ixgbe_service_task(struct work_struct *work)
 		ixgbe_service_event_complete(adapter);
 		return;
 	}
+	if (ixgbe_check_fw_error(adapter)) {
+		if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
+			rtnl_lock();
+			unregister_netdev(adapter->netdev);
+			rtnl_unlock();
+		}
+		ixgbe_service_event_complete(adapter);
+		return;
+	}
 	if (adapter->flags2 & IXGBE_FLAG2_UDP_TUN_REREG_NEEDED) {
 		rtnl_lock();
 		adapter->flags2 &= ~IXGBE_FLAG2_UDP_TUN_REREG_NEEDED;
@@ -10716,6 +10752,11 @@ 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");