ixgbe: driver for Intel(R) 82598 PCI-Express 10GbE adapters (v4)

This patch adds support for the Intel 82598 PCI-Express 10GbE
chipset. Devices will be available on the market soon.

This version of the driver is largely the same as the last release:

  * Driver uses a single RX and single TX queue, each using 1 MSI-X
  irq vector.
  * Driver runs in NAPI mode only
  * Driver is largely multiqueue-ready (TM)

Changes since 20070803:
  * removed wrappers for hardware functions
  * incorporated e1000e-style HW api reorganization code
  * sparse/checkpatch cleanups, namespace cleanups
  * driver prints out extra debugging information at load time
    identifying adapter board number, mac, phy types
  * removed ixgbe_api.c, ixgbe_api.h, ixgbe_osdep.h
  * driver update to 1.1.18
  * removed ixgbe.txt which contained no useful info anymore

[ Integrated napi_struct changes from Auke as well... -DaveM ]

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Ayyappan Veeraiyan <ayyappan.veeraiyan@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1175 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe_common.c b/drivers/net/ixgbe/ixgbe_common.c
new file mode 100644
index 00000000000..512e3b22ed0
--- /dev/null
+++ b/drivers/net/ixgbe/ixgbe_common.c
@@ -0,0 +1,1175 @@
+/*******************************************************************************
+
+  Intel 10 Gigabit PCI Express Linux driver
+  Copyright(c) 1999 - 2007 Intel Corporation.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Contact Information:
+  Linux NICS <linux.nics@intel.com>
+  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+
+#include "ixgbe_common.h"
+#include "ixgbe_phy.h"
+
+static s32 ixgbe_clear_hw_cntrs(struct ixgbe_hw *hw);
+
+static s32 ixgbe_poll_eeprom_eerd_done(struct ixgbe_hw *hw);
+static s32 ixgbe_get_eeprom_semaphore(struct ixgbe_hw *hw);
+static void ixgbe_release_eeprom_semaphore(struct ixgbe_hw *hw);
+static u16 ixgbe_calc_eeprom_checksum(struct ixgbe_hw *hw);
+
+static s32 ixgbe_clear_vfta(struct ixgbe_hw *hw);
+static s32 ixgbe_init_rx_addrs(struct ixgbe_hw *hw);
+static s32 ixgbe_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr);
+static void ixgbe_add_mc_addr(struct ixgbe_hw *hw, u8 *mc_addr);
+
+/**
+ *  ixgbe_start_hw - Prepare hardware for TX/RX
+ *  @hw: pointer to hardware structure
+ *
+ *  Starts the hardware by filling the bus info structure and media type, clears
+ *  all on chip counters, initializes receive address registers, multicast
+ *  table, VLAN filter table, calls routine to set up link and flow control
+ *  settings, and leaves transmit and receive units disabled and uninitialized
+ **/
+s32 ixgbe_start_hw(struct ixgbe_hw *hw)
+{
+	u32 ctrl_ext;
+
+	/* Set the media type */
+	hw->phy.media_type = hw->mac.ops.get_media_type(hw);
+
+	/* Identify the PHY */
+	ixgbe_identify_phy(hw);
+
+	/*
+	 * Store MAC address from RAR0, clear receive address registers, and
+	 * clear the multicast table
+	 */
+	ixgbe_init_rx_addrs(hw);
+
+	/* Clear the VLAN filter table */
+	ixgbe_clear_vfta(hw);
+
+	/* Set up link */
+	hw->phy.ops.setup(hw);
+
+	/* Clear statistics registers */
+	ixgbe_clear_hw_cntrs(hw);
+
+	/* Set No Snoop Disable */
+	ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
+	ctrl_ext |= IXGBE_CTRL_EXT_NS_DIS;
+	IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
+
+	/* Clear adapter stopped flag */
+	hw->adapter_stopped = false;
+
+	return 0;
+}
+
+/**
+ *  ixgbe_init_hw - Generic hardware initialization
+ *  @hw: pointer to hardware structure
+ *
+ *  Initialize the hardware by reseting the hardware, filling the bus info
+ *  structure and media type, clears all on chip counters, initializes receive
+ *  address registers, multicast table, VLAN filter table, calls routine to set
+ *  up link and flow control settings, and leaves transmit and receive units
+ *  disabled and uninitialized
+ **/
+s32 ixgbe_init_hw(struct ixgbe_hw *hw)
+{
+	/* Reset the hardware */
+	hw->mac.ops.reset(hw);
+
+	/* Start the HW */
+	ixgbe_start_hw(hw);
+
+	return 0;
+}
+
+/**
+ *  ixgbe_clear_hw_cntrs - Generic clear hardware counters
+ *  @hw: pointer to hardware structure
+ *
+ *  Clears all hardware statistics counters by reading them from the hardware
+ *  Statistics counters are clear on read.
+ **/
+static s32 ixgbe_clear_hw_cntrs(struct ixgbe_hw *hw)
+{
+	u16 i = 0;
+
+	IXGBE_READ_REG(hw, IXGBE_CRCERRS);
+	IXGBE_READ_REG(hw, IXGBE_ILLERRC);
+	IXGBE_READ_REG(hw, IXGBE_ERRBC);
+	IXGBE_READ_REG(hw, IXGBE_MSPDC);
+	for (i = 0; i < 8; i++)
+		IXGBE_READ_REG(hw, IXGBE_MPC(i));
+
+	IXGBE_READ_REG(hw, IXGBE_MLFC);
+	IXGBE_READ_REG(hw, IXGBE_MRFC);
+	IXGBE_READ_REG(hw, IXGBE_RLEC);
+	IXGBE_READ_REG(hw, IXGBE_LXONTXC);
+	IXGBE_READ_REG(hw, IXGBE_LXONRXC);
+	IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
+	IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
+
+	for (i = 0; i < 8; i++) {
+		IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
+		IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
+		IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
+		IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
+	}
+
+	IXGBE_READ_REG(hw, IXGBE_PRC64);
+	IXGBE_READ_REG(hw, IXGBE_PRC127);
+	IXGBE_READ_REG(hw, IXGBE_PRC255);
+	IXGBE_READ_REG(hw, IXGBE_PRC511);
+	IXGBE_READ_REG(hw, IXGBE_PRC1023);
+	IXGBE_READ_REG(hw, IXGBE_PRC1522);
+	IXGBE_READ_REG(hw, IXGBE_GPRC);
+	IXGBE_READ_REG(hw, IXGBE_BPRC);
+	IXGBE_READ_REG(hw, IXGBE_MPRC);
+	IXGBE_READ_REG(hw, IXGBE_GPTC);
+	IXGBE_READ_REG(hw, IXGBE_GORCL);
+	IXGBE_READ_REG(hw, IXGBE_GORCH);
+	IXGBE_READ_REG(hw, IXGBE_GOTCL);
+	IXGBE_READ_REG(hw, IXGBE_GOTCH);
+	for (i = 0; i < 8; i++)
+		IXGBE_READ_REG(hw, IXGBE_RNBC(i));
+	IXGBE_READ_REG(hw, IXGBE_RUC);
+	IXGBE_READ_REG(hw, IXGBE_RFC);
+	IXGBE_READ_REG(hw, IXGBE_ROC);
+	IXGBE_READ_REG(hw, IXGBE_RJC);
+	IXGBE_READ_REG(hw, IXGBE_MNGPRC);
+	IXGBE_READ_REG(hw, IXGBE_MNGPDC);
+	IXGBE_READ_REG(hw, IXGBE_MNGPTC);
+	IXGBE_READ_REG(hw, IXGBE_TORL);
+	IXGBE_READ_REG(hw, IXGBE_TORH);
+	IXGBE_READ_REG(hw, IXGBE_TPR);
+	IXGBE_READ_REG(hw, IXGBE_TPT);
+	IXGBE_READ_REG(hw, IXGBE_PTC64);
+	IXGBE_READ_REG(hw, IXGBE_PTC127);
+	IXGBE_READ_REG(hw, IXGBE_PTC255);
+	IXGBE_READ_REG(hw, IXGBE_PTC511);
+	IXGBE_READ_REG(hw, IXGBE_PTC1023);
+	IXGBE_READ_REG(hw, IXGBE_PTC1522);
+	IXGBE_READ_REG(hw, IXGBE_MPTC);
+	IXGBE_READ_REG(hw, IXGBE_BPTC);
+	for (i = 0; i < 16; i++) {
+		IXGBE_READ_REG(hw, IXGBE_QPRC(i));
+		IXGBE_READ_REG(hw, IXGBE_QBRC(i));
+		IXGBE_READ_REG(hw, IXGBE_QPTC(i));
+		IXGBE_READ_REG(hw, IXGBE_QBTC(i));
+	}
+
+	return 0;
+}
+
+/**
+ *  ixgbe_get_mac_addr - Generic get MAC address
+ *  @hw: pointer to hardware structure
+ *  @mac_addr: Adapter MAC address
+ *
+ *  Reads the adapter's MAC address from first Receive Address Register (RAR0)
+ *  A reset of the adapter must be performed prior to calling this function
+ *  in order for the MAC address to have been loaded from the EEPROM into RAR0
+ **/
+s32 ixgbe_get_mac_addr(struct ixgbe_hw *hw, u8 *mac_addr)
+{
+	u32 rar_high;
+	u32 rar_low;
+	u16 i;
+
+	rar_high = IXGBE_READ_REG(hw, IXGBE_RAH(0));
+	rar_low = IXGBE_READ_REG(hw, IXGBE_RAL(0));
+
+	for (i = 0; i < 4; i++)
+		mac_addr[i] = (u8)(rar_low >> (i*8));
+
+	for (i = 0; i < 2; i++)
+		mac_addr[i+4] = (u8)(rar_high >> (i*8));
+
+	return 0;
+}
+
+s32 ixgbe_read_part_num(struct ixgbe_hw *hw, u32 *part_num)
+{
+	s32 ret_val;
+	u16 data;
+
+	ret_val = ixgbe_read_eeprom(hw, IXGBE_PBANUM0_PTR, &data);
+	if (ret_val) {
+		hw_dbg(hw, "NVM Read Error\n");
+		return ret_val;
+	}
+	*part_num = (u32)(data << 16);
+
+	ret_val = ixgbe_read_eeprom(hw, IXGBE_PBANUM1_PTR, &data);
+	if (ret_val) {
+		hw_dbg(hw, "NVM Read Error\n");
+		return ret_val;
+	}
+	*part_num |= data;
+
+	return 0;
+}
+
+/**
+ *  ixgbe_stop_adapter - Generic stop TX/RX units
+ *  @hw: pointer to hardware structure
+ *
+ *  Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
+ *  disables transmit and receive units. The adapter_stopped flag is used by
+ *  the shared code and drivers to determine if the adapter is in a stopped
+ *  state and should not touch the hardware.
+ **/
+s32 ixgbe_stop_adapter(struct ixgbe_hw *hw)
+{
+	u32 number_of_queues;
+	u32 reg_val;
+	u16 i;
+
+	/*
+	 * Set the adapter_stopped flag so other driver functions stop touching
+	 * the hardware
+	 */
+	hw->adapter_stopped = true;
+
+	/* Disable the receive unit */
+	reg_val = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
+	reg_val &= ~(IXGBE_RXCTRL_RXEN);
+	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, reg_val);
+	msleep(2);
+
+	/* Clear interrupt mask to stop from interrupts being generated */
+	IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
+
+	/* Clear any pending interrupts */
+	IXGBE_READ_REG(hw, IXGBE_EICR);
+
+	/* Disable the transmit unit.  Each queue must be disabled. */
+	number_of_queues = hw->mac.num_tx_queues;
+	for (i = 0; i < number_of_queues; i++) {
+		reg_val = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
+		if (reg_val & IXGBE_TXDCTL_ENABLE) {
+			reg_val &= ~IXGBE_TXDCTL_ENABLE;
+			IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(i), reg_val);
+		}
+	}
+
+	return 0;
+}
+
+/**
+ *  ixgbe_led_on - Turns on the software controllable LEDs.
+ *  @hw: pointer to hardware structure
+ *  @index: led number to turn on
+ **/
+s32 ixgbe_led_on(struct ixgbe_hw *hw, u32 index)
+{
+	u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
+
+	/* To turn on the LED, set mode to ON. */
+	led_reg &= ~IXGBE_LED_MODE_MASK(index);
+	led_reg |= IXGBE_LED_ON << IXGBE_LED_MODE_SHIFT(index);
+	IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
+
+	return 0;
+}
+
+/**
+ *  ixgbe_led_off - Turns off the software controllable LEDs.
+ *  @hw: pointer to hardware structure
+ *  @index: led number to turn off
+ **/
+s32 ixgbe_led_off(struct ixgbe_hw *hw, u32 index)
+{
+	u32 led_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
+
+	/* To turn off the LED, set mode to OFF. */
+	led_reg &= ~IXGBE_LED_MODE_MASK(index);
+	led_reg |= IXGBE_LED_OFF << IXGBE_LED_MODE_SHIFT(index);
+	IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, led_reg);
+
+	return 0;
+}
+
+
+/**
+ *  ixgbe_init_eeprom - Initialize EEPROM params
+ *  @hw: pointer to hardware structure
+ *
+ *  Initializes the EEPROM parameters ixgbe_eeprom_info within the
+ *  ixgbe_hw struct in order to set up EEPROM access.
+ **/
+s32 ixgbe_init_eeprom(struct ixgbe_hw *hw)
+{
+	struct ixgbe_eeprom_info *eeprom = &hw->eeprom;
+	u32 eec;
+	u16 eeprom_size;
+
+	if (eeprom->type == ixgbe_eeprom_uninitialized) {
+		eeprom->type = ixgbe_eeprom_none;
+
+		/*
+		 * Check for EEPROM present first.
+		 * If not present leave as none
+		 */
+		eec = IXGBE_READ_REG(hw, IXGBE_EEC);
+		if (eec & IXGBE_EEC_PRES) {
+			eeprom->type = ixgbe_eeprom_spi;
+
+			/*
+			 * SPI EEPROM is assumed here.  This code would need to
+			 * change if a future EEPROM is not SPI.
+			 */
+			eeprom_size = (u16)((eec & IXGBE_EEC_SIZE) >>
+					    IXGBE_EEC_SIZE_SHIFT);
+			eeprom->word_size = 1 << (eeprom_size +
+						  IXGBE_EEPROM_WORD_SIZE_SHIFT);
+		}
+
+		if (eec & IXGBE_EEC_ADDR_SIZE)
+			eeprom->address_bits = 16;
+		else
+			eeprom->address_bits = 8;
+		hw_dbg(hw, "Eeprom params: type = %d, size = %d, address bits: "
+			  "%d\n", eeprom->type, eeprom->word_size,
+			  eeprom->address_bits);
+	}
+
+	return 0;
+}
+
+/**
+ *  ixgbe_read_eeprom - Read EEPROM word using EERD
+ *  @hw: pointer to hardware structure
+ *  @offset: offset of  word in the EEPROM to read
+ *  @data: word read from the EEPROM
+ *
+ *  Reads a 16 bit word from the EEPROM using the EERD register.
+ **/
+s32 ixgbe_read_eeprom(struct ixgbe_hw *hw, u16 offset, u16 *data)
+{
+	u32 eerd;
+	s32 status;
+
+	eerd = (offset << IXGBE_EEPROM_READ_ADDR_SHIFT) +
+	       IXGBE_EEPROM_READ_REG_START;
+
+	IXGBE_WRITE_REG(hw, IXGBE_EERD, eerd);
+	status = ixgbe_poll_eeprom_eerd_done(hw);
+
+	if (status == 0)
+		*data = (IXGBE_READ_REG(hw, IXGBE_EERD) >>
+			IXGBE_EEPROM_READ_REG_DATA);
+	else
+		hw_dbg(hw, "Eeprom read timed out\n");
+
+	return status;
+}
+
+/**
+ *  ixgbe_poll_eeprom_eerd_done - Poll EERD status
+ *  @hw: pointer to hardware structure
+ *
+ *  Polls the status bit (bit 1) of the EERD to determine when the read is done.
+ **/
+static s32 ixgbe_poll_eeprom_eerd_done(struct ixgbe_hw *hw)
+{
+	u32 i;
+	u32 reg;
+	s32 status = IXGBE_ERR_EEPROM;
+
+	for (i = 0; i < IXGBE_EERD_ATTEMPTS; i++) {
+		reg = IXGBE_READ_REG(hw, IXGBE_EERD);
+		if (reg & IXGBE_EEPROM_READ_REG_DONE) {
+			status = 0;
+			break;
+		}
+		udelay(5);
+	}
+	return status;
+}
+
+/**
+ *  ixgbe_get_eeprom_semaphore - Get hardware semaphore
+ *  @hw: pointer to hardware structure
+ *
+ *  Sets the hardware semaphores so EEPROM access can occur for bit-bang method
+ **/
+static s32 ixgbe_get_eeprom_semaphore(struct ixgbe_hw *hw)
+{
+	s32 status = IXGBE_ERR_EEPROM;
+	u32 timeout;
+	u32 i;
+	u32 swsm;
+
+	/* Set timeout value based on size of EEPROM */
+	timeout = hw->eeprom.word_size + 1;
+
+	/* Get SMBI software semaphore between device drivers first */
+	for (i = 0; i < timeout; i++) {
+		/*
+		 * If the SMBI bit is 0 when we read it, then the bit will be
+		 * set and we have the semaphore
+		 */
+		swsm = IXGBE_READ_REG(hw, IXGBE_SWSM);
+		if (!(swsm & IXGBE_SWSM_SMBI)) {
+			status = 0;
+			break;
+		}
+		msleep(1);
+	}
+
+	/* Now get the semaphore between SW/FW through the SWESMBI bit */
+	if (status == 0) {
+		for (i = 0; i < timeout; i++) {
+			swsm = IXGBE_READ_REG(hw, IXGBE_SWSM);
+
+			/* Set the SW EEPROM semaphore bit to request access */
+			swsm |= IXGBE_SWSM_SWESMBI;
+			IXGBE_WRITE_REG(hw, IXGBE_SWSM, swsm);
+
+			/*
+			 * If we set the bit successfully then we got the
+			 * semaphore.
+			 */
+			swsm = IXGBE_READ_REG(hw, IXGBE_SWSM);
+			if (swsm & IXGBE_SWSM_SWESMBI)
+				break;
+
+			udelay(50);
+		}
+
+		/*
+		 * Release semaphores and return error if SW EEPROM semaphore
+		 * was not granted because we don't have access to the EEPROM
+		 */
+		if (i >= timeout) {
+			hw_dbg(hw, "Driver can't access the Eeprom - Semaphore "
+				 "not granted.\n");
+			ixgbe_release_eeprom_semaphore(hw);
+			status = IXGBE_ERR_EEPROM;
+		}
+	}
+
+	return status;
+}
+
+/**
+ *  ixgbe_release_eeprom_semaphore - Release hardware semaphore
+ *  @hw: pointer to hardware structure
+ *
+ *  This function clears hardware semaphore bits.
+ **/
+static void ixgbe_release_eeprom_semaphore(struct ixgbe_hw *hw)
+{
+	u32 swsm;
+
+	swsm = IXGBE_READ_REG(hw, IXGBE_SWSM);
+
+	/* Release both semaphores by writing 0 to the bits SWESMBI and SMBI */
+	swsm &= ~(IXGBE_SWSM_SWESMBI | IXGBE_SWSM_SMBI);
+	IXGBE_WRITE_REG(hw, IXGBE_SWSM, swsm);
+}
+
+/**
+ *  ixgbe_calc_eeprom_checksum - Calculates and returns the checksum
+ *  @hw: pointer to hardware structure
+ **/
+static u16 ixgbe_calc_eeprom_checksum(struct ixgbe_hw *hw)
+{
+	u16 i;
+	u16 j;
+	u16 checksum = 0;
+	u16 length = 0;
+	u16 pointer = 0;
+	u16 word = 0;
+
+	/* Include 0x0-0x3F in the checksum */
+	for (i = 0; i < IXGBE_EEPROM_CHECKSUM; i++) {
+		if (ixgbe_read_eeprom(hw, i, &word) != 0) {
+			hw_dbg(hw, "EEPROM read failed\n");
+			break;
+		}
+		checksum += word;
+	}
+
+	/* Include all data from pointers except for the fw pointer */
+	for (i = IXGBE_PCIE_ANALOG_PTR; i < IXGBE_FW_PTR; i++) {
+		ixgbe_read_eeprom(hw, i, &pointer);
+
+		/* Make sure the pointer seems valid */
+		if (pointer != 0xFFFF && pointer != 0) {
+			ixgbe_read_eeprom(hw, pointer, &length);
+
+			if (length != 0xFFFF && length != 0) {
+				for (j = pointer+1; j <= pointer+length; j++) {
+					ixgbe_read_eeprom(hw, j, &word);
+					checksum += word;
+				}
+			}
+		}
+	}
+
+	checksum = (u16)IXGBE_EEPROM_SUM - checksum;
+
+	return checksum;
+}
+
+/**
+ *  ixgbe_validate_eeprom_checksum - Validate EEPROM checksum
+ *  @hw: pointer to hardware structure
+ *  @checksum_val: calculated checksum
+ *
+ *  Performs checksum calculation and validates the EEPROM checksum.  If the
+ *  caller does not need checksum_val, the value can be NULL.
+ **/
+s32 ixgbe_validate_eeprom_checksum(struct ixgbe_hw *hw, u16 *checksum_val)
+{
+	s32 status;
+	u16 checksum;
+	u16 read_checksum = 0;
+
+	/*
+	 * Read the first word from the EEPROM. If this times out or fails, do
+	 * not continue or we could be in for a very long wait while every
+	 * EEPROM read fails
+	 */
+	status = ixgbe_read_eeprom(hw, 0, &checksum);
+
+	if (status == 0) {
+		checksum = ixgbe_calc_eeprom_checksum(hw);
+
+		ixgbe_read_eeprom(hw, IXGBE_EEPROM_CHECKSUM, &read_checksum);
+
+		/*
+		 * Verify read checksum from EEPROM is the same as
+		 * calculated checksum
+		 */
+		if (read_checksum != checksum)
+			status = IXGBE_ERR_EEPROM_CHECKSUM;
+
+		/* If the user cares, return the calculated checksum */
+		if (checksum_val)
+			*checksum_val = checksum;
+	} else {
+		hw_dbg(hw, "EEPROM read failed\n");
+	}
+
+	return status;
+}
+
+/**
+ *  ixgbe_validate_mac_addr - Validate MAC address
+ *  @mac_addr: pointer to MAC address.
+ *
+ *  Tests a MAC address to ensure it is a valid Individual Address
+ **/
+s32 ixgbe_validate_mac_addr(u8 *mac_addr)
+{
+	s32 status = 0;
+
+	/* Make sure it is not a multicast address */
+	if (IXGBE_IS_MULTICAST(mac_addr))
+		status = IXGBE_ERR_INVALID_MAC_ADDR;
+	/* Not a broadcast address */
+	else if (IXGBE_IS_BROADCAST(mac_addr))
+		status = IXGBE_ERR_INVALID_MAC_ADDR;
+	/* Reject the zero address */
+	else if (mac_addr[0] == 0 && mac_addr[1] == 0 && mac_addr[2] == 0 &&
+		 mac_addr[3] == 0 && mac_addr[4] == 0 && mac_addr[5] == 0)
+		status = IXGBE_ERR_INVALID_MAC_ADDR;
+
+	return status;
+}
+
+/**
+ *  ixgbe_set_rar - Set RX address register
+ *  @hw: pointer to hardware structure
+ *  @addr: Address to put into receive address register
+ *  @index: Receive address register to write
+ *  @vind: Vind to set RAR to
+ *  @enable_addr: set flag that address is active
+ *
+ *  Puts an ethernet address into a receive address register.
+ **/
+s32 ixgbe_set_rar(struct ixgbe_hw *hw, u32 index, u8 *addr, u32 vind,
+		  u32 enable_addr)
+{
+	u32 rar_low, rar_high;
+
+	/*
+	 * HW expects these in little endian so we reverse the byte order from
+	 * network order (big endian) to little endian
+	 */
+	rar_low = ((u32)addr[0] |
+		   ((u32)addr[1] << 8) |
+		   ((u32)addr[2] << 16) |
+		   ((u32)addr[3] << 24));
+
+	rar_high = ((u32)addr[4] |
+		    ((u32)addr[5] << 8) |
+		    ((vind << IXGBE_RAH_VIND_SHIFT) & IXGBE_RAH_VIND_MASK));
+
+	if (enable_addr != 0)
+		rar_high |= IXGBE_RAH_AV;
+
+	IXGBE_WRITE_REG(hw, IXGBE_RAL(index), rar_low);
+	IXGBE_WRITE_REG(hw, IXGBE_RAH(index), rar_high);
+
+	return 0;
+}
+
+/**
+ *  ixgbe_init_rx_addrs - Initializes receive address filters.
+ *  @hw: pointer to hardware structure
+ *
+ *  Places the MAC address in receive address register 0 and clears the rest
+ *  of the receive addresss registers. Clears the multicast table. Assumes
+ *  the receiver is in reset when the routine is called.
+ **/
+static s32 ixgbe_init_rx_addrs(struct ixgbe_hw *hw)
+{
+	u32 i;
+	u32 rar_entries = hw->mac.num_rx_addrs;
+
+	/*
+	 * If the current mac address is valid, assume it is a software override
+	 * to the permanent address.
+	 * Otherwise, use the permanent address from the eeprom.
+	 */
+	if (ixgbe_validate_mac_addr(hw->mac.addr) ==
+	    IXGBE_ERR_INVALID_MAC_ADDR) {
+		/* Get the MAC address from the RAR0 for later reference */
+		ixgbe_get_mac_addr(hw, hw->mac.addr);
+
+		hw_dbg(hw, " Keeping Current RAR0 Addr =%.2X %.2X %.2X ",
+			  hw->mac.addr[0], hw->mac.addr[1],
+			  hw->mac.addr[2]);
+		hw_dbg(hw, "%.2X %.2X %.2X\n", hw->mac.addr[3],
+			  hw->mac.addr[4], hw->mac.addr[5]);
+	} else {
+		/* Setup the receive address. */
+		hw_dbg(hw, "Overriding MAC Address in RAR[0]\n");
+		hw_dbg(hw, " New MAC Addr =%.2X %.2X %.2X ",
+			  hw->mac.addr[0], hw->mac.addr[1],
+			  hw->mac.addr[2]);
+		hw_dbg(hw, "%.2X %.2X %.2X\n", hw->mac.addr[3],
+			  hw->mac.addr[4], hw->mac.addr[5]);
+
+		ixgbe_set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
+	}
+
+	hw->addr_ctrl.rar_used_count = 1;
+
+	/* Zero out the other receive addresses. */
+	hw_dbg(hw, "Clearing RAR[1-15]\n");
+	for (i = 1; i < rar_entries; i++) {
+		IXGBE_WRITE_REG(hw, IXGBE_RAL(i), 0);
+		IXGBE_WRITE_REG(hw, IXGBE_RAH(i), 0);
+	}
+
+	/* Clear the MTA */
+	hw->addr_ctrl.mc_addr_in_rar_count = 0;
+	hw->addr_ctrl.mta_in_use = 0;
+	IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL, hw->mac.mc_filter_type);
+
+	hw_dbg(hw, " Clearing MTA\n");
+	for (i = 0; i < IXGBE_MC_TBL_SIZE; i++)
+		IXGBE_WRITE_REG(hw, IXGBE_MTA(i), 0);
+
+	return 0;
+}
+
+/**
+ *  ixgbe_mta_vector - Determines bit-vector in multicast table to set
+ *  @hw: pointer to hardware structure
+ *  @mc_addr: the multicast address
+ *
+ *  Extracts the 12 bits, from a multicast address, to determine which
+ *  bit-vector to set in the multicast table. The hardware uses 12 bits, from
+ *  incoming rx multicast addresses, to determine the bit-vector to check in
+ *  the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
+ *  by the MO field of the MCSTCTRL. The MO field is set during initalization
+ *  to mc_filter_type.
+ **/
+static s32 ixgbe_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
+{
+	u32 vector = 0;
+
+	switch (hw->mac.mc_filter_type) {
+	case 0:	  /* use bits [47:36] of the address */
+		vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
+		break;
+	case 1:	  /* use bits [46:35] of the address */
+		vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
+		break;
+	case 2:	  /* use bits [45:34] of the address */
+		vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
+		break;
+	case 3:	  /* use bits [43:32] of the address */
+		vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
+		break;
+	default:	 /* Invalid mc_filter_type */
+		hw_dbg(hw, "MC filter type param set incorrectly\n");
+		break;
+	}
+
+	/* vector can only be 12-bits or boundary will be exceeded */
+	vector &= 0xFFF;
+	return vector;
+}
+
+/**
+ *  ixgbe_set_mta - Set bit-vector in multicast table
+ *  @hw: pointer to hardware structure
+ *  @hash_value: Multicast address hash value
+ *
+ *  Sets the bit-vector in the multicast table.
+ **/
+static void ixgbe_set_mta(struct ixgbe_hw *hw, u8 *mc_addr)
+{
+	u32 vector;
+	u32 vector_bit;
+	u32 vector_reg;
+	u32 mta_reg;
+
+	hw->addr_ctrl.mta_in_use++;
+
+	vector = ixgbe_mta_vector(hw, mc_addr);
+	hw_dbg(hw, " bit-vector = 0x%03X\n", vector);
+
+	/*
+	 * The MTA is a register array of 128 32-bit registers. It is treated
+	 * like an array of 4096 bits.  We want to set bit
+	 * BitArray[vector_value]. So we figure out what register the bit is
+	 * in, read it, OR in the new bit, then write back the new value.  The
+	 * register is determined by the upper 7 bits of the vector value and
+	 * the bit within that register are determined by the lower 5 bits of
+	 * the value.
+	 */
+	vector_reg = (vector >> 5) & 0x7F;
+	vector_bit = vector & 0x1F;
+	mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
+	mta_reg |= (1 << vector_bit);
+	IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
+}
+
+/**
+ *  ixgbe_add_mc_addr - Adds a multicast address.
+ *  @hw: pointer to hardware structure
+ *  @mc_addr: new multicast address
+ *
+ *  Adds it to unused receive address register or to the multicast table.
+ **/
+static void ixgbe_add_mc_addr(struct ixgbe_hw *hw, u8 *mc_addr)
+{
+	u32 rar_entries = hw->mac.num_rx_addrs;
+
+	hw_dbg(hw, " MC Addr =%.2X %.2X %.2X %.2X %.2X %.2X\n",
+		  mc_addr[0], mc_addr[1], mc_addr[2],
+		  mc_addr[3], mc_addr[4], mc_addr[5]);
+
+	/*
+	 * Place this multicast address in the RAR if there is room,
+	 * else put it in the MTA
+	 */
+	if (hw->addr_ctrl.rar_used_count < rar_entries) {
+		ixgbe_set_rar(hw, hw->addr_ctrl.rar_used_count,
+			      mc_addr, 0, IXGBE_RAH_AV);
+		hw_dbg(hw, "Added a multicast address to RAR[%d]\n",
+			  hw->addr_ctrl.rar_used_count);
+		hw->addr_ctrl.rar_used_count++;
+		hw->addr_ctrl.mc_addr_in_rar_count++;
+	} else {
+		ixgbe_set_mta(hw, mc_addr);
+	}
+
+	hw_dbg(hw, "ixgbe_add_mc_addr Complete\n");
+}
+
+/**
+ *  ixgbe_update_mc_addr_list - Updates MAC list of multicast addresses
+ *  @hw: pointer to hardware structure
+ *  @mc_addr_list: the list of new multicast addresses
+ *  @mc_addr_count: number of addresses
+ *  @pad: number of bytes between addresses in the list
+ *
+ *  The given list replaces any existing list. Clears the MC addrs from receive
+ *  address registers and the multicast table. Uses unsed receive address
+ *  registers for the first multicast addresses, and hashes the rest into the
+ *  multicast table.
+ **/
+s32 ixgbe_update_mc_addr_list(struct ixgbe_hw *hw, u8 *mc_addr_list,
+			      u32 mc_addr_count, u32 pad)
+{
+	u32 i;
+	u32 rar_entries = hw->mac.num_rx_addrs;
+
+	/*
+	 * Set the new number of MC addresses that we are being requested to
+	 * use.
+	 */
+	hw->addr_ctrl.num_mc_addrs = mc_addr_count;
+	hw->addr_ctrl.rar_used_count -= hw->addr_ctrl.mc_addr_in_rar_count;
+	hw->addr_ctrl.mc_addr_in_rar_count = 0;
+	hw->addr_ctrl.mta_in_use = 0;
+
+	/* Zero out the other receive addresses. */
+	hw_dbg(hw, "Clearing RAR[1-15]\n");
+	for (i = hw->addr_ctrl.rar_used_count; i < rar_entries; i++) {
+		IXGBE_WRITE_REG(hw, IXGBE_RAL(i), 0);
+		IXGBE_WRITE_REG(hw, IXGBE_RAH(i), 0);
+	}
+
+	/* Clear the MTA */
+	hw_dbg(hw, " Clearing MTA\n");
+	for (i = 0; i < IXGBE_MC_TBL_SIZE; i++)
+		IXGBE_WRITE_REG(hw, IXGBE_MTA(i), 0);
+
+	/* Add the new addresses */
+	for (i = 0; i < mc_addr_count; i++) {
+		hw_dbg(hw, " Adding the multicast addresses:\n");
+		ixgbe_add_mc_addr(hw, mc_addr_list +
+				  (i * (IXGBE_ETH_LENGTH_OF_ADDRESS + pad)));
+	}
+
+	/* Enable mta */
+	if (hw->addr_ctrl.mta_in_use > 0)
+		IXGBE_WRITE_REG(hw, IXGBE_MCSTCTRL,
+				IXGBE_MCSTCTRL_MFE | hw->mac.mc_filter_type);
+
+	hw_dbg(hw, "ixgbe_update_mc_addr_list Complete\n");
+	return 0;
+}
+
+/**
+ *  ixgbe_clear_vfta - Clear VLAN filter table
+ *  @hw: pointer to hardware structure
+ *
+ *  Clears the VLAN filer table, and the VMDq index associated with the filter
+ **/
+static s32 ixgbe_clear_vfta(struct ixgbe_hw *hw)
+{
+	u32 offset;
+	u32 vlanbyte;
+
+	for (offset = 0; offset < IXGBE_VLAN_FILTER_TBL_SIZE; offset++)
+		IXGBE_WRITE_REG(hw, IXGBE_VFTA(offset), 0);
+
+	for (vlanbyte = 0; vlanbyte < 4; vlanbyte++)
+		for (offset = 0; offset < IXGBE_VLAN_FILTER_TBL_SIZE; offset++)
+			IXGBE_WRITE_REG(hw, IXGBE_VFTAVIND(vlanbyte, offset),
+					0);
+
+	return 0;
+}
+
+/**
+ *  ixgbe_set_vfta - Set VLAN filter table
+ *  @hw: pointer to hardware structure
+ *  @vlan: VLAN id to write to VLAN filter
+ *  @vind: VMDq output index that maps queue to VLAN id in VFTA
+ *  @vlan_on: boolean flag to turn on/off VLAN in VFTA
+ *
+ *  Turn on/off specified VLAN in the VLAN filter table.
+ **/
+s32 ixgbe_set_vfta(struct ixgbe_hw *hw, u32 vlan, u32 vind,
+		   bool vlan_on)
+{
+	u32 VftaIndex;
+	u32 BitOffset;
+	u32 VftaReg;
+	u32 VftaByte;
+
+	/* Determine 32-bit word position in array */
+	VftaIndex = (vlan >> 5) & 0x7F;   /* upper seven bits */
+
+	/* Determine the location of the (VMD) queue index */
+	VftaByte =  ((vlan >> 3) & 0x03); /* bits (4:3) indicating byte array */
+	BitOffset = (vlan & 0x7) << 2;    /* lower 3 bits indicate nibble */
+
+	/* Set the nibble for VMD queue index */
+	VftaReg = IXGBE_READ_REG(hw, IXGBE_VFTAVIND(VftaByte, VftaIndex));
+	VftaReg &= (~(0x0F << BitOffset));
+	VftaReg |= (vind << BitOffset);
+	IXGBE_WRITE_REG(hw, IXGBE_VFTAVIND(VftaByte, VftaIndex), VftaReg);
+
+	/* Determine the location of the bit for this VLAN id */
+	BitOffset = vlan & 0x1F;	   /* lower five bits */
+
+	VftaReg = IXGBE_READ_REG(hw, IXGBE_VFTA(VftaIndex));
+	if (vlan_on)
+		/* Turn on this VLAN id */
+		VftaReg |= (1 << BitOffset);
+	else
+		/* Turn off this VLAN id */
+		VftaReg &= ~(1 << BitOffset);
+	IXGBE_WRITE_REG(hw, IXGBE_VFTA(VftaIndex), VftaReg);
+
+	return 0;
+}
+
+/**
+ *  ixgbe_setup_fc - Configure flow control settings
+ *  @hw: pointer to hardware structure
+ *  @packetbuf_num: packet buffer number (0-7)
+ *
+ *  Configures the flow control settings based on SW configuration.
+ *  This function is used for 802.3x flow control configuration only.
+ **/
+s32 ixgbe_setup_fc(struct ixgbe_hw *hw, s32 packetbuf_num)
+{
+	u32 frctl_reg;
+	u32 rmcs_reg;
+
+	if (packetbuf_num < 0 || packetbuf_num > 7)
+		hw_dbg(hw, "Invalid packet buffer number [%d], expected range"
+		       "is 0-7\n", packetbuf_num);
+
+	frctl_reg = IXGBE_READ_REG(hw, IXGBE_FCTRL);
+	frctl_reg &= ~(IXGBE_FCTRL_RFCE | IXGBE_FCTRL_RPFCE);
+
+	rmcs_reg = IXGBE_READ_REG(hw, IXGBE_RMCS);
+	rmcs_reg &= ~(IXGBE_RMCS_TFCE_PRIORITY | IXGBE_RMCS_TFCE_802_3X);
+
+	/*
+	 * We want to save off the original Flow Control configuration just in
+	 * case we get disconnected and then reconnected into a different hub
+	 * or switch with different Flow Control capabilities.
+	 */
+	hw->fc.type = hw->fc.original_type;
+
+	/*
+	 * The possible values of the "flow_control" parameter are:
+	 * 0: Flow control is completely disabled
+	 * 1: Rx flow control is enabled (we can receive pause frames but not
+	 *    send pause frames).
+	 * 2: Tx flow control is enabled (we can send pause frames but we do not
+	 *    support receiving pause frames)
+	 * 3: Both Rx and TX flow control (symmetric) are enabled.
+	 * other: Invalid.
+	 */
+	switch (hw->fc.type) {
+	case ixgbe_fc_none:
+		break;
+	case ixgbe_fc_rx_pause:
+		/*
+		 * RX Flow control is enabled,
+		 * and TX Flow control is disabled.
+		 */
+		frctl_reg |= IXGBE_FCTRL_RFCE;
+		break;
+	case ixgbe_fc_tx_pause:
+		/*
+		 * TX Flow control is enabled, and RX Flow control is disabled,
+		 * by a software over-ride.
+		 */
+		rmcs_reg |= IXGBE_RMCS_TFCE_802_3X;
+		break;
+	case ixgbe_fc_full:
+		/*
+		 * Flow control (both RX and TX) is enabled by a software
+		 * over-ride.
+		 */
+		frctl_reg |= IXGBE_FCTRL_RFCE;
+		rmcs_reg |= IXGBE_RMCS_TFCE_802_3X;
+		break;
+	default:
+		/* We should never get here.  The value should be 0-3. */
+		hw_dbg(hw, "Flow control param set incorrectly\n");
+		break;
+	}
+
+	/* Enable 802.3x based flow control settings. */
+	IXGBE_WRITE_REG(hw, IXGBE_FCTRL, frctl_reg);
+	IXGBE_WRITE_REG(hw, IXGBE_RMCS, rmcs_reg);
+
+	/*
+	 * We need to set up the Receive Threshold high and low water
+	 * marks as well as (optionally) enabling the transmission of
+	 * XON frames.
+	 */
+	if (hw->fc.type & ixgbe_fc_tx_pause) {
+		if (hw->fc.send_xon) {
+			IXGBE_WRITE_REG(hw, IXGBE_FCRTL(packetbuf_num),
+					(hw->fc.low_water | IXGBE_FCRTL_XONE));
+		} else {
+			IXGBE_WRITE_REG(hw, IXGBE_FCRTL(packetbuf_num),
+					hw->fc.low_water);
+		}
+		IXGBE_WRITE_REG(hw, IXGBE_FCRTH(packetbuf_num),
+				(hw->fc.high_water)|IXGBE_FCRTH_FCEN);
+	}
+
+	IXGBE_WRITE_REG(hw, IXGBE_FCTTV(0), hw->fc.pause_time);
+	IXGBE_WRITE_REG(hw, IXGBE_FCRTV, (hw->fc.pause_time >> 1));
+
+	return 0;
+}
+
+/**
+ *  ixgbe_disable_pcie_master - Disable PCI-express master access
+ *  @hw: pointer to hardware structure
+ *
+ *  Disables PCI-Express master access and verifies there are no pending
+ *  requests. IXGBE_ERR_MASTER_REQUESTS_PENDING is returned if master disable
+ *  bit hasn't caused the master requests to be disabled, else 0
+ *  is returned signifying master requests disabled.
+ **/
+s32 ixgbe_disable_pcie_master(struct ixgbe_hw *hw)
+{
+	u32 ctrl;
+	s32 i;
+	s32 status = IXGBE_ERR_MASTER_REQUESTS_PENDING;
+
+	ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
+	ctrl |= IXGBE_CTRL_GIO_DIS;
+	IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
+
+	for (i = 0; i < IXGBE_PCI_MASTER_DISABLE_TIMEOUT; i++) {
+		if (!(IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_GIO)) {
+			status = 0;
+			break;
+		}
+		udelay(100);
+	}
+
+	return status;
+}
+
+
+/**
+ *  ixgbe_acquire_swfw_sync - Aquire SWFW semaphore
+ *  @hw: pointer to hardware structure
+ *  @mask: Mask to specify wich semaphore to acquire
+ *
+ *  Aquires the SWFW semaphore throught the GSSR register for the specified
+ *  function (CSR, PHY0, PHY1, EEPROM, Flash)
+ **/
+s32 ixgbe_acquire_swfw_sync(struct ixgbe_hw *hw, u16 mask)
+{
+	u32 gssr;
+	u32 swmask = mask;
+	u32 fwmask = mask << 5;
+	s32 timeout = 200;
+
+	while (timeout) {
+		if (ixgbe_get_eeprom_semaphore(hw))
+			return -IXGBE_ERR_SWFW_SYNC;
+
+		gssr = IXGBE_READ_REG(hw, IXGBE_GSSR);
+		if (!(gssr & (fwmask | swmask)))
+			break;
+
+		/*
+		 * Firmware currently using resource (fwmask) or other software
+		 * thread currently using resource (swmask)
+		 */
+		ixgbe_release_eeprom_semaphore(hw);
+		msleep(5);
+		timeout--;
+	}
+
+	if (!timeout) {
+		hw_dbg(hw, "Driver can't access resource, GSSR timeout.\n");
+		return -IXGBE_ERR_SWFW_SYNC;
+	}
+
+	gssr |= swmask;
+	IXGBE_WRITE_REG(hw, IXGBE_GSSR, gssr);
+
+	ixgbe_release_eeprom_semaphore(hw);
+	return 0;
+}
+
+/**
+ *  ixgbe_release_swfw_sync - Release SWFW semaphore
+ *  @hw: pointer to hardware structure
+ *  @mask: Mask to specify wich semaphore to release
+ *
+ *  Releases the SWFW semaphore throught the GSSR register for the specified
+ *  function (CSR, PHY0, PHY1, EEPROM, Flash)
+ **/
+void ixgbe_release_swfw_sync(struct ixgbe_hw *hw, u16 mask)
+{
+	u32 gssr;
+	u32 swmask = mask;
+
+	ixgbe_get_eeprom_semaphore(hw);
+
+	gssr = IXGBE_READ_REG(hw, IXGBE_GSSR);
+	gssr &= ~swmask;
+	IXGBE_WRITE_REG(hw, IXGBE_GSSR, gssr);
+
+	ixgbe_release_eeprom_semaphore(hw);
+}
+
+/**
+ *  ixgbe_read_analog_reg8- Reads 8 bit 82598 Atlas analog register
+ *  @hw: pointer to hardware structure
+ *  @reg: analog register to read
+ *  @val: read value
+ *
+ *  Performs write operation to analog register specified.
+ **/
+s32 ixgbe_read_analog_reg8(struct ixgbe_hw *hw, u32 reg, u8 *val)
+{
+	u32  atlas_ctl;
+
+	IXGBE_WRITE_REG(hw, IXGBE_ATLASCTL,
+			IXGBE_ATLASCTL_WRITE_CMD | (reg << 8));
+	IXGBE_WRITE_FLUSH(hw);
+	udelay(10);
+	atlas_ctl = IXGBE_READ_REG(hw, IXGBE_ATLASCTL);
+	*val = (u8)atlas_ctl;
+
+	return 0;
+}
+
+/**
+ *  ixgbe_write_analog_reg8- Writes 8 bit Atlas analog register
+ *  @hw: pointer to hardware structure
+ *  @reg: atlas register to write
+ *  @val: value to write
+ *
+ *  Performs write operation to Atlas analog register specified.
+ **/
+s32 ixgbe_write_analog_reg8(struct ixgbe_hw *hw, u32 reg, u8 val)
+{
+	u32  atlas_ctl;
+
+	atlas_ctl = (reg << 8) | val;
+	IXGBE_WRITE_REG(hw, IXGBE_ATLASCTL, atlas_ctl);
+	IXGBE_WRITE_FLUSH(hw);
+	udelay(10);
+
+	return 0;
+}
+