i40e: warn on newer/older firmware API rev

If the firmware's API minor number is larger than the one expected, log
a warning and recommend driver SW update.
If the firmware's API major or minor number is smaller then the one expected
(n for major, n or n-1 for minor), log a warning and recommend NVM update.

Change-ID: If0b887e055478f8e435ba7fa28113b63a6f1bb35
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -8633,6 +8633,20 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_pf_reset;
 	}
 
+	if (hw->aq.api_min_ver > I40E_FW_API_VERSION_MINOR)
+		dev_info(&pdev->dev,
+			 "Note: FW API version %02x.%02x newer than expected %02x.%02x, recommend driver update.\n",
+			 hw->aq.api_maj_ver, hw->aq.api_min_ver,
+			 I40E_FW_API_VERSION_MAJOR, I40E_FW_API_VERSION_MINOR);
+
+	if (hw->aq.api_maj_ver < I40E_FW_API_VERSION_MAJOR ||
+	    hw->aq.api_min_ver < (I40E_FW_API_VERSION_MINOR-1))
+		dev_info(&pdev->dev,
+			 "Note: FW API version %02x.%02x older than expected %02x.%02x, recommend nvm update.\n",
+			 hw->aq.api_maj_ver, hw->aq.api_min_ver,
+			 I40E_FW_API_VERSION_MAJOR, I40E_FW_API_VERSION_MINOR);
+
+
 	i40e_verify_eeprom(pf);
 
 	/* Rev 0 hardware was never productized */