igb: Add function to read i211's invm version

The i211's one-time programmable (invm) version field is different than the
other fields contained in it.  This patch adds a function to get the invm version
of it and store it for output from ethtool.
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

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

@@ -422,6 +422,100 @@ s32 igb_read_invm_i211(struct e1000_hw *hw, u16 address, u16 *data)
 	return status;
 }
 
+/**
+ *  igb_read_invm_version - Reads iNVM version and image type
+ *  @hw: pointer to the HW structure
+ *  @invm_ver: version structure for the version read
+ *
+ *  Reads iNVM version and image type.
+ **/
+s32 igb_read_invm_version(struct e1000_hw *hw,
+			  struct e1000_fw_version *invm_ver) {
+	u32 *record = NULL;
+	u32 *next_record = NULL;
+	u32 i = 0;
+	u32 invm_dword = 0;
+	u32 invm_blocks = E1000_INVM_SIZE - (E1000_INVM_ULT_BYTES_SIZE /
+					     E1000_INVM_RECORD_SIZE_IN_BYTES);
+	u32 buffer[E1000_INVM_SIZE];
+	s32 status = -E1000_ERR_INVM_VALUE_NOT_FOUND;
+	u16 version = 0;
+
+	/* Read iNVM memory */
+	for (i = 0; i < E1000_INVM_SIZE; i++) {
+		invm_dword = rd32(E1000_INVM_DATA_REG(i));
+		buffer[i] = invm_dword;
+	}
+
+	/* Read version number */
+	for (i = 1; i < invm_blocks; i++) {
+		record = &buffer[invm_blocks - i];
+		next_record = &buffer[invm_blocks - i + 1];
+
+		/* Check if we have first version location used */
+		if ((i == 1) && ((*record & E1000_INVM_VER_FIELD_ONE) == 0)) {
+			version = 0;
+			status = E1000_SUCCESS;
+			break;
+		}
+		/* Check if we have second version location used */
+		else if ((i == 1) &&
+			 ((*record & E1000_INVM_VER_FIELD_TWO) == 0)) {
+			version = (*record & E1000_INVM_VER_FIELD_ONE) >> 3;
+			status = E1000_SUCCESS;
+			break;
+		}
+		/* Check if we have odd version location
+		 * used and it is the last one used
+		 */
+		else if ((((*record & E1000_INVM_VER_FIELD_ONE) == 0) &&
+			 ((*record & 0x3) == 0)) || (((*record & 0x3) != 0) &&
+			 (i != 1))) {
+			version = (*next_record & E1000_INVM_VER_FIELD_TWO)
+				  >> 13;
+			status = E1000_SUCCESS;
+			break;
+		}
+		/* Check if we have even version location
+		 * used and it is the last one used
+		 */
+		else if (((*record & E1000_INVM_VER_FIELD_TWO) == 0) &&
+			 ((*record & 0x3) == 0)) {
+			version = (*record & E1000_INVM_VER_FIELD_ONE) >> 3;
+			status = E1000_SUCCESS;
+			break;
+		}
+	}
+
+	if (status == E1000_SUCCESS) {
+		invm_ver->invm_major = (version & E1000_INVM_MAJOR_MASK)
+					>> E1000_INVM_MAJOR_SHIFT;
+		invm_ver->invm_minor = version & E1000_INVM_MINOR_MASK;
+	}
+	/* Read Image Type */
+	for (i = 1; i < invm_blocks; i++) {
+		record = &buffer[invm_blocks - i];
+		next_record = &buffer[invm_blocks - i + 1];
+
+		/* Check if we have image type in first location used */
+		if ((i == 1) && ((*record & E1000_INVM_IMGTYPE_FIELD) == 0)) {
+			invm_ver->invm_img_type = 0;
+			status = E1000_SUCCESS;
+			break;
+		}
+		/* Check if we have image type in first location used */
+		else if ((((*record & 0x3) == 0) &&
+			 ((*record & E1000_INVM_IMGTYPE_FIELD) == 0)) ||
+			 ((((*record & 0x3) != 0) && (i != 1)))) {
+			invm_ver->invm_img_type =
+				(*next_record & E1000_INVM_IMGTYPE_FIELD) >> 23;
+			status = E1000_SUCCESS;
+			break;
+		}
+	}
+	return status;
+}
+
 /**
  *  igb_validate_nvm_checksum_i210 - Validate EEPROM checksum
  *  @hw: pointer to the HW structure

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

@@ -43,6 +43,8 @@ extern void igb_release_nvm_i210(struct e1000_hw *hw);
 extern s32 igb_valid_led_default_i210(struct e1000_hw *hw, u16 *data);
 extern s32 igb_read_nvm_i211(struct e1000_hw *hw, u16 offset, u16 words,
 			       u16 *data);
+extern s32 igb_read_invm_version(struct e1000_hw *hw,
+				 struct e1000_fw_version *invm_ver);
 
 #define E1000_STM_OPCODE		0xDB00
 #define E1000_EEPROM_FLASH_SIZE_WORD	0x11
@@ -65,6 +67,15 @@ enum E1000_INVM_STRUCTURE_TYPE {
 
 #define E1000_INVM_RSA_KEY_SHA256_DATA_SIZE_IN_DWORDS	8
 #define E1000_INVM_CSR_AUTOLOAD_DATA_SIZE_IN_DWORDS	1
+#define E1000_INVM_ULT_BYTES_SIZE			8
+#define E1000_INVM_RECORD_SIZE_IN_BYTES			4
+#define E1000_INVM_VER_FIELD_ONE			0x1FF8
+#define E1000_INVM_VER_FIELD_TWO			0x7FE000
+#define E1000_INVM_IMGTYPE_FIELD			0x1F800000
+
+#define E1000_INVM_MAJOR_MASK		0x3F0
+#define E1000_INVM_MINOR_MASK		0xF
+#define E1000_INVM_MAJOR_SHIFT		4
 
 #define ID_LED_DEFAULT_I210		((ID_LED_OFF1_ON2  << 8) | \
 					 (ID_LED_OFF1_OFF2 <<  4) | \

drivers/net/ethernet/intel/igb/e1000_mac.h

@@ -33,6 +33,7 @@
 #include "e1000_phy.h"
 #include "e1000_nvm.h"
 #include "e1000_defines.h"
+#include "e1000_i210.h"
 
 /*
  * Functions that should not be called directly from drivers but can be used

drivers/net/ethernet/intel/igb/e1000_nvm.c

@@ -727,6 +727,7 @@ void igb_get_fw_version(struct e1000_hw *hw, struct e1000_fw_version *fw_vers)
 
 	switch (hw->mac.type) {
 	case e1000_i211:
+		igb_read_invm_version(hw, fw_vers);
 		return;
 	case e1000_82575:
 	case e1000_82576: