net/i40e: fix using recovery mode firmware

Device can't function properly with a firmware that is in recovery
mode.

Check the firmware status at initialization time. If the firmware is
in recovery mode, alert the user to check it.

Cc: stable@dpdk.org
Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 552a7a5..f61a12e 100644 (file)
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -1273,7 +1273,7 @@ eth_i40e_dev_init(struct rte_eth_dev *dev, void *init_params __rte_unused)
        struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
        struct i40e_vsi *vsi;
        int ret;
-       uint32_t len;
+       uint32_t len, val;
        uint8_t aq_fail = 0;
 
        PMD_INIT_FUNC_TRACE();
@@ -1324,6 +1324,15 @@ eth_i40e_dev_init(struct rte_eth_dev *dev, void *init_params __rte_unused)
         */
        hw->switch_tag = 0xffff;
 
+       val = I40E_READ_REG(hw, I40E_GL_FWSTS);
+       if (val & I40E_GL_FWSTS_FWS1B_MASK) {
+               PMD_INIT_LOG(ERR, "\nERROR: "
+                       "Firmware recovery mode detected. Limiting functionality.\n"
+                       "Refer to the Intel(R) Ethernet Adapters and Devices "
+                       "User Guide for details on firmware recovery mode.");
+               return -EIO;
+       }
+
        /* Check if need to support multi-driver */
        i40e_support_multi_driver(dev);
        /* Check if users want the latest supported vec path */