igb: Updates to read nvm function for i211 device

The i211 has an integrated secure space to store configuration information that is
usually stored in an EEPROM or flash type device. This patch updates the
read functions to return values or appropriate error codes to prevent
unnecessary init failures on some configuration schemes.
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/igb/e1000_i210.c

@@ -350,16 +350,40 @@ s32 igb_read_nvm_i211(struct e1000_hw *hw, u16 offset, u16 words,
 		if (ret_val != E1000_SUCCESS)
 			hw_dbg("MAC Addr not found in iNVM\n");
 		break;
-	case NVM_ID_LED_SETTINGS:
 	case NVM_INIT_CTRL_2:
+		ret_val = igb_read_invm_i211(hw, (u8)offset, data);
+		if (ret_val != E1000_SUCCESS) {
+			*data = NVM_INIT_CTRL_2_DEFAULT_I211;
+			ret_val = E1000_SUCCESS;
+		}
+		break;
 	case NVM_INIT_CTRL_4:
+		ret_val = igb_read_invm_i211(hw, (u8)offset, data);
+		if (ret_val != E1000_SUCCESS) {
+			*data = NVM_INIT_CTRL_4_DEFAULT_I211;
+			ret_val = E1000_SUCCESS;
+		}
+		break;
 	case NVM_LED_1_CFG:
+		ret_val = igb_read_invm_i211(hw, (u8)offset, data);
+		if (ret_val != E1000_SUCCESS) {
+			*data = NVM_LED_1_CFG_DEFAULT_I211;
+			ret_val = E1000_SUCCESS;
+		}
+		break;
 	case NVM_LED_0_2_CFG:
 		igb_read_invm_i211(hw, offset, data);
+		if (ret_val != E1000_SUCCESS) {
+			*data = NVM_LED_0_2_CFG_DEFAULT_I211;
+			ret_val = E1000_SUCCESS;
+		}
 		break;
-	case NVM_COMPAT:
-		*data = ID_LED_DEFAULT_I210;
-		break;
+	case NVM_ID_LED_SETTINGS:
+		ret_val = igb_read_invm_i211(hw, (u8)offset, data);
+		if (ret_val != E1000_SUCCESS) {
+			*data = ID_LED_RESERVED_FFFF;
+			ret_val = E1000_SUCCESS;
+		}
 	case NVM_SUB_DEV_ID:
 		*data = hw->subsystem_device_id;
 		break;

drivers/net/ethernet/intel/igb/e1000_i210.h

@@ -84,4 +84,10 @@ enum E1000_INVM_STRUCTURE_TYPE {
 					 (ID_LED_DEF1_DEF2 <<  4) | \
 					 (ID_LED_DEF1_DEF2))
 
+/* NVM offset defaults for i211 device */
+#define NVM_INIT_CTRL_2_DEFAULT_I211	0X7243
+#define NVM_INIT_CTRL_4_DEFAULT_I211	0x00C1
+#define NVM_LED_1_CFG_DEFAULT_I211	0x0184
+#define NVM_LED_0_2_CFG_DEFAULT_I211	0x200C
+
 #endif