1 files changed, 113 insertions, 22 deletions

diff --git a/drivers/net/e1000e/lib.c b/drivers/net/e1000e/lib.c
index 0fd4eb5ac5f..8377523c054 100644
--- a/drivers/net/e1000e/lib.c
+++ b/drivers/net/e1000e/lib.c
@@ -2139,6 +2139,119 @@ s32 e1000e_write_nvm_spi(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
 }
 
 /**
+ *  e1000_read_pba_string_generic - Read device part number
+ *  @hw: pointer to the HW structure
+ *  @pba_num: pointer to device part number
+ *  @pba_num_size: size of part number buffer
+ *
+ *  Reads the product board assembly (PBA) number from the EEPROM and stores
+ *  the value in pba_num.
+ **/
+s32 e1000_read_pba_string_generic(struct e1000_hw *hw, u8 *pba_num,
+				  u32 pba_num_size)
+{
+	s32 ret_val;
+	u16 nvm_data;
+	u16 pba_ptr;
+	u16 offset;
+	u16 length;
+
+	if (pba_num == NULL) {
+		e_dbg("PBA string buffer was null\n");
+		ret_val = E1000_ERR_INVALID_ARGUMENT;
+		goto out;
+	}
+
+	ret_val = e1000_read_nvm(hw, NVM_PBA_OFFSET_0, 1, &nvm_data);
+	if (ret_val) {
+		e_dbg("NVM Read Error\n");
+		goto out;
+	}
+
+	ret_val = e1000_read_nvm(hw, NVM_PBA_OFFSET_1, 1, &pba_ptr);
+	if (ret_val) {
+		e_dbg("NVM Read Error\n");
+		goto out;
+	}
+
+	/*
+	 * if nvm_data is not ptr guard the PBA must be in legacy format which
+	 * means pba_ptr is actually our second data word for the PBA number
+	 * and we can decode it into an ascii string
+	 */
+	if (nvm_data != NVM_PBA_PTR_GUARD) {
+		e_dbg("NVM PBA number is not stored as string\n");
+
+		/* we will need 11 characters to store the PBA */
+		if (pba_num_size < 11) {
+			e_dbg("PBA string buffer too small\n");
+			return E1000_ERR_NO_SPACE;
+		}
+
+		/* extract hex string from data and pba_ptr */
+		pba_num[0] = (nvm_data >> 12) & 0xF;
+		pba_num[1] = (nvm_data >> 8) & 0xF;
+		pba_num[2] = (nvm_data >> 4) & 0xF;
+		pba_num[3] = nvm_data & 0xF;
+		pba_num[4] = (pba_ptr >> 12) & 0xF;
+		pba_num[5] = (pba_ptr >> 8) & 0xF;
+		pba_num[6] = '-';
+		pba_num[7] = 0;
+		pba_num[8] = (pba_ptr >> 4) & 0xF;
+		pba_num[9] = pba_ptr & 0xF;
+
+		/* put a null character on the end of our string */
+		pba_num[10] = '\0';
+
+		/* switch all the data but the '-' to hex char */
+		for (offset = 0; offset < 10; offset++) {
+			if (pba_num[offset] < 0xA)
+				pba_num[offset] += '0';
+			else if (pba_num[offset] < 0x10)
+				pba_num[offset] += 'A' - 0xA;
+		}
+
+		goto out;
+	}
+
+	ret_val = e1000_read_nvm(hw, pba_ptr, 1, &length);
+	if (ret_val) {
+		e_dbg("NVM Read Error\n");
+		goto out;
+	}
+
+	if (length == 0xFFFF || length == 0) {
+		e_dbg("NVM PBA number section invalid length\n");
+		ret_val = E1000_ERR_NVM_PBA_SECTION;
+		goto out;
+	}
+	/* check if pba_num buffer is big enough */
+	if (pba_num_size < (((u32)length * 2) - 1)) {
+		e_dbg("PBA string buffer too small\n");
+		ret_val = E1000_ERR_NO_SPACE;
+		goto out;
+	}
+
+	/* trim pba length from start of string */
+	pba_ptr++;
+	length--;
+
+	for (offset = 0; offset < length; offset++) {
+		ret_val = e1000_read_nvm(hw, pba_ptr + offset, 1, &nvm_data);
+		if (ret_val) {
+			e_dbg("NVM Read Error\n");
+			goto out;
+		}
+		pba_num[offset * 2] = (u8)(nvm_data >> 8);
+		pba_num[(offset * 2) + 1] = (u8)(nvm_data & 0xFF);
+	}
+	pba_num[offset * 2] = '\0';
+
+out:
+	return ret_val;
+}
+
+/**
  *  e1000_read_mac_addr_generic - Read device MAC address
  *  @hw: pointer to the HW structure
  *
@@ -2579,25 +2692,3 @@ bool e1000e_enable_mng_pass_thru(struct e1000_hw *hw)
 out:
 	return ret_val;
 }
-
-s32 e1000e_read_pba_num(struct e1000_hw *hw, u32 *pba_num)
-{
-	s32 ret_val;
-	u16 nvm_data;
-
-	ret_val = e1000_read_nvm(hw, NVM_PBA_OFFSET_0, 1, &nvm_data);
-	if (ret_val) {
-		e_dbg("NVM Read Error\n");
-		return ret_val;
-	}
-	*pba_num = (u32)(nvm_data << 16);
-
-	ret_val = e1000_read_nvm(hw, NVM_PBA_OFFSET_1, 1, &nvm_data);
-	if (ret_val) {
-		e_dbg("NVM Read Error\n");
-		return ret_val;
-	}
-	*pba_num |= nvm_data;
-
-	return 0;
-}