path: root/drivers/net/ixgbe/base/ixgbe_x540.c

/*******************************************************************************

Copyright (c) 2001-2015, Intel Corporation
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 1. Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer.

 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.

 3. Neither the name of the Intel Corporation nor the names of its
    contributors may be used to endorse or promote products derived from
    this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

***************************************************************************/

#include "ixgbe_x540.h"
#include "ixgbe_type.h"
#include "ixgbe_api.h"
#include "ixgbe_common.h"
#include "ixgbe_phy.h"

#define IXGBE_X540_MAX_TX_QUEUES	128
#define IXGBE_X540_MAX_RX_QUEUES	128
#define IXGBE_X540_RAR_ENTRIES		128
#define IXGBE_X540_MC_TBL_SIZE		128
#define IXGBE_X540_VFT_TBL_SIZE		128
#define IXGBE_X540_RX_PB_SIZE		384

STATIC s32 ixgbe_poll_flash_update_done_X540(struct ixgbe_hw *hw);
STATIC s32 ixgbe_get_swfw_sync_semaphore(struct ixgbe_hw *hw);
STATIC void ixgbe_release_swfw_sync_semaphore(struct ixgbe_hw *hw);

/**
 *  ixgbe_init_ops_X540 - Inits func ptrs and MAC type
 *  @hw: pointer to hardware structure
 *
 *  Initialize the function pointers and assign the MAC type for X540.
 *  Does not touch the hardware.
 **/
s32 ixgbe_init_ops_X540(struct ixgbe_hw *hw)
{
	struct ixgbe_mac_info *mac = &hw->mac;
	struct ixgbe_phy_info *phy = &hw->phy;
	struct ixgbe_eeprom_info *eeprom = &hw->eeprom;
	s32 ret_val;

	DEBUGFUNC("ixgbe_init_ops_X540");

	ret_val = ixgbe_init_phy_ops_generic(hw);
	ret_val = ixgbe_init_ops_generic(hw);


	/* EEPROM */
	eeprom->ops.init_params = ixgbe_init_eeprom_params_X540;
	eeprom->ops.read = ixgbe_read_eerd_X540;
	eeprom->ops.read_buffer = ixgbe_read_eerd_buffer_X540;
	eeprom->ops.write = ixgbe_write_eewr_X540;
	eeprom->ops.write_buffer = ixgbe_write_eewr_buffer_X540;
	eeprom->ops.update_checksum = ixgbe_update_eeprom_checksum_X540;
	eeprom->ops.validate_checksum = ixgbe_validate_eeprom_checksum_X540;
	eeprom->ops.calc_checksum = ixgbe_calc_eeprom_checksum_X540;

	/* PHY */
	phy->ops.init = ixgbe_init_phy_ops_generic;
	phy->ops.reset = NULL;
	phy->ops.set_phy_power = ixgbe_set_copper_phy_power;

	/* MAC */
	mac->ops.reset_hw = ixgbe_reset_hw_X540;
	mac->ops.enable_relaxed_ordering = ixgbe_enable_relaxed_ordering_gen2;
	mac->ops.get_media_type = ixgbe_get_media_type_X540;
	mac->ops.get_supported_physical_layer =
				    ixgbe_get_supported_physical_layer_X540;
	mac->ops.read_analog_reg8 = NULL;
	mac->ops.write_analog_reg8 = NULL;
	mac->ops.start_hw = ixgbe_start_hw_X540;
	mac->ops.get_san_mac_addr = ixgbe_get_san_mac_addr_generic;
	mac->ops.set_san_mac_addr = ixgbe_set_san_mac_addr_generic;
	mac->ops.get_device_caps = ixgbe_get_device_caps_generic;
	mac->ops.get_wwn_prefix = ixgbe_get_wwn_prefix_generic;
	mac->ops.get_fcoe_boot_status = ixgbe_get_fcoe_boot_status_generic;
	mac->ops.acquire_swfw_sync = ixgbe_acquire_swfw_sync_X540;
	mac->ops.release_swfw_sync = ixgbe_release_swfw_sync_X540;
	mac->ops.init_swfw_sync = ixgbe_init_swfw_sync_X540;
	mac->ops.disable_sec_rx_path = ixgbe_disable_sec_rx_path_generic;
	mac->ops.enable_sec_rx_path = ixgbe_enable_sec_rx_path_generic;

	/* RAR, Multicast, VLAN */
	mac->ops.set_vmdq = ixgbe_set_vmdq_generic;
	mac->ops.set_vmdq_san_mac = ixgbe_set_vmdq_san_mac_generic;
	mac->ops.clear_vmdq = ixgbe_clear_vmdq_generic;
	mac->ops.insert_mac_addr = ixgbe_insert_mac_addr_generic;
	mac->rar_highwater = 1;
	mac->ops.set_vfta = ixgbe_set_vfta_generic;
	mac->ops.set_vlvf = ixgbe_set_vlvf_generic;
	mac->ops.clear_vfta = ixgbe_clear_vfta_generic;
	mac->ops.init_uta_tables = ixgbe_init_uta_tables_generic;
	mac->ops.set_mac_anti_spoofing = ixgbe_set_mac_anti_spoofing;
	mac->ops.set_vlan_anti_spoofing = ixgbe_set_vlan_anti_spoofing;

	/* Link */
	mac->ops.get_link_capabilities =
				ixgbe_get_copper_link_capabilities_generic;
	mac->ops.setup_link = ixgbe_setup_mac_link_X540;
	mac->ops.setup_rxpba = ixgbe_set_rxpba_generic;
	mac->ops.check_link = ixgbe_check_mac_link_generic;


	mac->mcft_size		= IXGBE_X540_MC_TBL_SIZE;
	mac->vft_size		= IXGBE_X540_VFT_TBL_SIZE;
	mac->num_rar_entries	= IXGBE_X540_RAR_ENTRIES;
	mac->rx_pb_size		= IXGBE_X540_RX_PB_SIZE;
	mac->max_rx_queues	= IXGBE_X540_MAX_RX_QUEUES;
	mac->max_tx_queues	= IXGBE_X540_MAX_TX_QUEUES;
	mac->max_msix_vectors	= ixgbe_get_pcie_msix_count_generic(hw);

	/*
	 * FWSM register
	 * ARC supported; valid only if manageability features are
	 * enabled.
	 */
	mac->arc_subsystem_valid = !!(IXGBE_READ_REG(hw, IXGBE_FWSM_BY_MAC(hw))
				     & IXGBE_FWSM_MODE_MASK);

	hw->mbx.ops.init_params = ixgbe_init_mbx_params_pf;

	/* LEDs */
	mac->ops.blink_led_start = ixgbe_blink_led_start_X540;
	mac->ops.blink_led_stop = ixgbe_blink_led_stop_X540;

	/* Manageability interface */
	mac->ops.set_fw_drv_ver = ixgbe_set_fw_drv_ver_generic;

	mac->ops.get_rtrup2tc = ixgbe_dcb_get_rtrup2tc_generic;

	return ret_val;
}

/**
 *  ixgbe_get_link_capabilities_X540 - Determines link capabilities
 *  @hw: pointer to hardware structure
 *  @speed: pointer to link speed
 *  @autoneg: true when autoneg or autotry is enabled
 *
 *  Determines the link capabilities by reading the AUTOC register.
 **/
s32 ixgbe_get_link_capabilities_X540(struct ixgbe_hw *hw,
				     ixgbe_link_speed *speed,
				     bool *autoneg)
{
	ixgbe_get_copper_link_capabilities_generic(hw, speed, autoneg);

	return IXGBE_SUCCESS;
}

/**
 *  ixgbe_get_media_type_X540 - Get media type
 *  @hw: pointer to hardware structure
 *
 *  Returns the media type (fiber, copper, backplane)
 **/
enum ixgbe_media_type ixgbe_get_media_type_X540(struct ixgbe_hw *hw)
{
	UNREFERENCED_1PARAMETER(hw);
	return ixgbe_media_type_copper;
}

/**
 *  ixgbe_setup_mac_link_X540 - Sets the auto advertised capabilities
 *  @hw: pointer to hardware structure
 *  @speed: new link speed
 *  @autoneg_wait_to_complete: true when waiting for completion is needed
 **/
s32 ixgbe_setup_mac_link_X540(struct ixgbe_hw *hw,
			      ixgbe_link_speed speed,
			      bool autoneg_wait_to_complete)
{
	DEBUGFUNC("ixgbe_setup_mac_link_X540");
	return hw->phy.ops.setup_link_speed(hw, speed, autoneg_wait_to_complete);
}

/**
 *  ixgbe_reset_hw_X540 - Perform hardware reset
 *  @hw: pointer to hardware structure
 *
 *  Resets the hardware by resetting the transmit and receive units, masks
 *  and clears all interrupts, and perform a reset.
 **/
s32 ixgbe_reset_hw_X540(struct ixgbe_hw *hw)
{
	s32 status;
	u32 ctrl, i;
	u32 swfw_mask = hw->phy.phy_semaphore_mask;

	DEBUGFUNC("ixgbe_reset_hw_X540");

	/* Call adapter stop to disable tx/rx and clear interrupts */
	status = hw->mac.ops.stop_adapter(hw);
	if (status != IXGBE_SUCCESS)
		goto reset_hw_out;

	/* flush pending Tx transactions */
	ixgbe_clear_tx_pending(hw);

mac_reset_top:
	status = hw->mac.ops.acquire_swfw_sync(hw, swfw_mask);
	if (status != IXGBE_SUCCESS) {
		ERROR_REPORT2(IXGBE_ERROR_CAUTION,
			"semaphore failed with %d", status);
		return IXGBE_ERR_SWFW_SYNC;
	}
	ctrl = IXGBE_CTRL_RST;
	ctrl |= IXGBE_READ_REG(hw, IXGBE_CTRL);
	IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
	IXGBE_WRITE_FLUSH(hw);
	hw->mac.ops.release_swfw_sync(hw, swfw_mask);

	/* Poll for reset bit to self-clear indicating reset is complete */
	for (i = 0; i < 10; i++) {
		usec_delay(1);
		ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
		if (!(ctrl & IXGBE_CTRL_RST_MASK))
			break;
	}

	if (ctrl & IXGBE_CTRL_RST_MASK) {
		status = IXGBE_ERR_RESET_FAILED;
		ERROR_REPORT1(IXGBE_ERROR_POLLING,
			     "Reset polling failed to complete.\n");
	}
	msec_delay(100);

	/*
	 * Double resets are required for recovery from certain error
	 * conditions.  Between resets, it is necessary to stall to allow time
	 * for any pending HW events to complete.
	 */
	if (hw->mac.flags & IXGBE_FLAGS_DOUBLE_RESET_REQUIRED) {
		hw->mac.flags &= ~IXGBE_FLAGS_DOUBLE_RESET_REQUIRED;
		goto mac_reset_top;
	}

	/* Set the Rx packet buffer size. */
	IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(0), 384 << IXGBE_RXPBSIZE_SHIFT);

	/* Store the permanent mac address */
	hw->mac.ops.get_mac_addr(hw, hw->mac.perm_addr);

	/*
	 * Store MAC address from RAR0, clear receive address registers, and
	 * clear the multicast table.  Also reset num_rar_entries to 128,
	 * since we modify this value when programming the SAN MAC address.
	 */
	hw->mac.num_rar_entries = 128;
	hw->mac.ops.init_rx_addrs(hw);

	/* Store the permanent SAN mac address */
	hw->mac.ops.get_san_mac_addr(hw, hw->mac.san_addr);

	/* Add the SAN MAC address to the RAR only if it's a valid address */
	if (ixgbe_validate_mac_addr(hw->mac.san_addr) == 0) {
		/* Save the SAN MAC RAR index */
		hw->mac.san_mac_rar_index = hw->mac.num_rar_entries - 1;

		hw->mac.ops.set_rar(hw, hw->mac.san_mac_rar_index,
				    hw->mac.san_addr, 0, IXGBE_RAH_AV);

		/* clear VMDq pool/queue selection for this RAR */
		hw->mac.ops.clear_vmdq(hw, hw->mac.san_mac_rar_index,
				       IXGBE_CLEAR_VMDQ_ALL);

		/* Reserve the last RAR for the SAN MAC address */
		hw->mac.num_rar_entries--;
	}

	/* Store the alternative WWNN/WWPN prefix */
	hw->mac.ops.get_wwn_prefix(hw, &hw->mac.wwnn_prefix,
				   &hw->mac.wwpn_prefix);

reset_hw_out:
	return status;
}

/**
 *  ixgbe_start_hw_X540 - Prepare hardware for Tx/Rx
 *  @hw: pointer to hardware structure
 *
 *  Starts the hardware using the generic start_hw function
 *  and the generation start_hw function.
 *  Then performs revision-specific operations, if any.
 **/
s32 ixgbe_start_hw_X540(struct ixgbe_hw *hw)
{
	s32 ret_val = IXGBE_SUCCESS;

	DEBUGFUNC("ixgbe_start_hw_X540");

	ret_val = ixgbe_start_hw_generic(hw);
	if (ret_val != IXGBE_SUCCESS)
		goto out;

	ret_val = ixgbe_start_hw_gen2(hw);

out:
	return ret_val;
}

/**
 *  ixgbe_get_supported_physical_layer_X540 - Returns physical layer type
 *  @hw: pointer to hardware structure
 *
 *  Determines physical layer capabilities of the current configuration.
 **/
u64 ixgbe_get_supported_physical_layer_X540(struct ixgbe_hw *hw)
{
	u64 physical_layer = IXGBE_PHYSICAL_LAYER_UNKNOWN;
	u16 ext_ability = 0;

	DEBUGFUNC("ixgbe_get_supported_physical_layer_X540");

	hw->phy.ops.read_reg(hw, IXGBE_MDIO_PHY_EXT_ABILITY,
	IXGBE_MDIO_PMA_PMD_DEV_TYPE, &ext_ability);
	if (ext_ability & IXGBE_MDIO_PHY_10GBASET_ABILITY)
		physical_layer |= IXGBE_PHYSICAL_LAYER_10GBASE_T;
	if (ext_ability & IXGBE_MDIO_PHY_1000BASET_ABILITY)
		physical_layer |= IXGBE_PHYSICAL_LAYER_1000BASE_T;
	if (ext_ability & IXGBE_MDIO_PHY_100BASETX_ABILITY)
		physical_layer |= IXGBE_PHYSICAL_LAYER_100BASE_TX;

	return physical_layer;
}

/**
 *  ixgbe_init_eeprom_params_X540 - 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_params_X540(struct ixgbe_hw *hw)
{
	struct ixgbe_eeprom_info *eeprom = &hw->eeprom;
	u32 eec;
	u16 eeprom_size;

	DEBUGFUNC("ixgbe_init_eeprom_params_X540");

	if (eeprom->type == ixgbe_eeprom_uninitialized) {
		eeprom->semaphore_delay = 10;
		eeprom->type = ixgbe_flash;

		eec = IXGBE_READ_REG(hw, IXGBE_EEC_BY_MAC(hw));
		eeprom_size = (u16)((eec & IXGBE_EEC_SIZE) >>
				    IXGBE_EEC_SIZE_SHIFT);
		eeprom->word_size = 1 << (eeprom_size +
					  IXGBE_EEPROM_WORD_SIZE_SHIFT);

		DEBUGOUT2("Eeprom params: type = %d, size = %d\n",
			  eeprom->type, eeprom->word_size);
	}

	return IXGBE_SUCCESS;
}

/**
 *  ixgbe_read_eerd_X540- 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_eerd_X540(struct ixgbe_hw *hw, u16 offset, u16 *data)
{
	s32 status = IXGBE_SUCCESS;

	DEBUGFUNC("ixgbe_read_eerd_X540");
	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM) ==
	    IXGBE_SUCCESS) {
		status = ixgbe_read_eerd_generic(hw, offset, data);
		hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
	} else {
		status = IXGBE_ERR_SWFW_SYNC;
	}

	return status;
}

/**
 *  ixgbe_read_eerd_buffer_X540- Read EEPROM word(s) using EERD
 *  @hw: pointer to hardware structure
 *  @offset: offset of  word in the EEPROM to read
 *  @words: number of words
 *  @data: word(s) read from the EEPROM
 *
 *  Reads a 16 bit word(s) from the EEPROM using the EERD register.
 **/
s32 ixgbe_read_eerd_buffer_X540(struct ixgbe_hw *hw,
				u16 offset, u16 words, u16 *data)
{
	s32 status = IXGBE_SUCCESS;

	DEBUGFUNC("ixgbe_read_eerd_buffer_X540");
	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM) ==
	    IXGBE_SUCCESS) {
		status = ixgbe_read_eerd_buffer_generic(hw, offset,
							words, data);
		hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
	} else {
		status = IXGBE_ERR_SWFW_SYNC;
	}

	return status;
}

/**
 *  ixgbe_write_eewr_X540 - Write EEPROM word using EEWR
 *  @hw: pointer to hardware structure
 *  @offset: offset of  word in the EEPROM to write
 *  @data: word write to the EEPROM
 *
 *  Write a 16 bit word to the EEPROM using the EEWR register.
 **/
s32 ixgbe_write_eewr_X540(struct ixgbe_hw *hw, u16 offset, u16 data)
{
	s32 status = IXGBE_SUCCESS;

	DEBUGFUNC("ixgbe_write_eewr_X540");
	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM) ==
	    IXGBE_SUCCESS) {
		status = ixgbe_write_eewr_generic(hw, offset, data);
		hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
	} else {
		status = IXGBE_ERR_SWFW_SYNC;
	}

	return status;
}

/**
 *  ixgbe_write_eewr_buffer_X540 - Write EEPROM word(s) using EEWR
 *  @hw: pointer to hardware structure
 *  @offset: offset of  word in the EEPROM to write
 *  @words: number of words
 *  @data: word(s) write to the EEPROM
 *
 *  Write a 16 bit word(s) to the EEPROM using the EEWR register.
 **/
s32 ixgbe_write_eewr_buffer_X540(struct ixgbe_hw *hw,
				 u16 offset, u16 words, u16 *data)
{
	s32 status = IXGBE_SUCCESS;

	DEBUGFUNC("ixgbe_write_eewr_buffer_X540");
	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM) ==
	    IXGBE_SUCCESS) {
		status = ixgbe_write_eewr_buffer_generic(hw, offset,
							 words, data);
		hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
	} else {
		status = IXGBE_ERR_SWFW_SYNC;
	}

	return status;
}

/**
 *  ixgbe_calc_eeprom_checksum_X540 - Calculates and returns the checksum
 *
 *  This function does not use synchronization for EERD and EEWR. It can
 *  be used internally by function which utilize ixgbe_acquire_swfw_sync_X540.
 *
 *  @hw: pointer to hardware structure
 *
 *  Returns a negative error code on error, or the 16-bit checksum
 **/
s32 ixgbe_calc_eeprom_checksum_X540(struct ixgbe_hw *hw)
{
	u16 i, j;
	u16 checksum = 0;
	u16 length = 0;
	u16 pointer = 0;
	u16 word = 0;
	u16 ptr_start = IXGBE_PCIE_ANALOG_PTR;

	/* Do not use hw->eeprom.ops.read because we do not want to take
	 * the synchronization semaphores here. Instead use
	 * ixgbe_read_eerd_generic
	 */

	DEBUGFUNC("ixgbe_calc_eeprom_checksum_X540");

	/* Include 0x0 up to IXGBE_EEPROM_CHECKSUM; do not include the
	 * checksum itself
	 */
	for (i = 0; i < IXGBE_EEPROM_CHECKSUM; i++) {
		if (ixgbe_read_eerd_generic(hw, i, &word)) {
			DEBUGOUT("EEPROM read failed\n");
			return IXGBE_ERR_EEPROM;
		}
		checksum += word;
	}

	/* Include all data from pointers 0x3, 0x6-0xE.  This excludes the
	 * FW, PHY module, and PCIe Expansion/Option ROM pointers.
	 */
	for (i = ptr_start; i < IXGBE_FW_PTR; i++) {
		if (i == IXGBE_PHY_PTR || i == IXGBE_OPTION_ROM_PTR)
			continue;

		if (ixgbe_read_eerd_generic(hw, i, &pointer)) {
			DEBUGOUT("EEPROM read failed\n");
			return IXGBE_ERR_EEPROM;
		}

		/* Skip pointer section if the pointer is invalid. */
		if (pointer == 0xFFFF || pointer == 0 ||
		    pointer >= hw->eeprom.word_size)
			continue;

		if (ixgbe_read_eerd_generic(hw, pointer, &length)) {
			DEBUGOUT("EEPROM read failed\n");
			return IXGBE_ERR_EEPROM;
		}

		/* Skip pointer section if length is invalid. */
		if (length == 0xFFFF || length == 0 ||
		    (pointer + length) >= hw->eeprom.word_size)
			continue;

		for (j = pointer + 1; j <= pointer + length; j++) {
			if (ixgbe_read_eerd_generic(hw, j, &word)) {
				DEBUGOUT("EEPROM read failed\n");
				return IXGBE_ERR_EEPROM;
			}
			checksum += word;
		}
	}

	checksum = (u16)IXGBE_EEPROM_SUM - checksum;

	return (s32)checksum;
}

/**
 *  ixgbe_validate_eeprom_checksum_X540 - 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_X540(struct ixgbe_hw *hw,
					u16 *checksum_val)
{
	s32 status;
	u16 checksum;
	u16 read_checksum = 0;

	DEBUGFUNC("ixgbe_validate_eeprom_checksum_X540");

	/* 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 = hw->eeprom.ops.read(hw, 0, &checksum);
	if (status) {
		DEBUGOUT("EEPROM read failed\n");
		return status;
	}

	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM))
		return IXGBE_ERR_SWFW_SYNC;

	status = hw->eeprom.ops.calc_checksum(hw);
	if (status < 0)
		goto out;

	checksum = (u16)(status & 0xffff);

	/* Do not use hw->eeprom.ops.read because we do not want to take
	 * the synchronization semaphores twice here.
	 */
	status = ixgbe_read_eerd_generic(hw, IXGBE_EEPROM_CHECKSUM,
					 &read_checksum);
	if (status)
		goto out;

	/* Verify read checksum from EEPROM is the same as
	 * calculated checksum
	 */
	if (read_checksum != checksum) {
		ERROR_REPORT1(IXGBE_ERROR_INVALID_STATE,
			     "Invalid EEPROM checksum");
		status = IXGBE_ERR_EEPROM_CHECKSUM;
	}

	/* If the user cares, return the calculated checksum */
	if (checksum_val)
		*checksum_val = checksum;

out:
	hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);

	return status;
}

/**
 * ixgbe_update_eeprom_checksum_X540 - Updates the EEPROM checksum and flash
 * @hw: pointer to hardware structure
 *
 * After writing EEPROM to shadow RAM using EEWR register, software calculates
 * checksum and updates the EEPROM and instructs the hardware to update
 * the flash.
 **/
s32 ixgbe_update_eeprom_checksum_X540(struct ixgbe_hw *hw)
{
	s32 status;
	u16 checksum;

	DEBUGFUNC("ixgbe_update_eeprom_checksum_X540");

	/* 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 = hw->eeprom.ops.read(hw, 0, &checksum);
	if (status) {
		DEBUGOUT("EEPROM read failed\n");
		return status;
	}

	if (hw->mac.ops.acquire_swfw_sync(hw, IXGBE_GSSR_EEP_SM))
		return IXGBE_ERR_SWFW_SYNC;

	status = hw->eeprom.ops.calc_checksum(hw);
	if (status < 0)
		goto out;

	checksum = (u16)(status & 0xffff);

	/* Do not use hw->eeprom.ops.write because we do not want to
	 * take the synchronization semaphores twice here.
	 */
	status = ixgbe_write_eewr_generic(hw, IXGBE_EEPROM_CHECKSUM, checksum);
	if (status)
		goto out;

	status = ixgbe_update_flash_X540(hw);

out:
	hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);

	return status;
}

/**
 *  ixgbe_update_flash_X540 - Instruct HW to copy EEPROM to Flash device
 *  @hw: pointer to hardware structure
 *
 *  Set FLUP (bit 23) of the EEC register to instruct Hardware to copy
 *  EEPROM from shadow RAM to the flash device.
 **/
s32 ixgbe_update_flash_X540(struct ixgbe_hw *hw)
{
	u32 flup;
	s32 status;

	DEBUGFUNC("ixgbe_update_flash_X540");

	status = ixgbe_poll_flash_update_done_X540(hw);
	if (status == IXGBE_ERR_EEPROM) {
		DEBUGOUT("Flash update time out\n");
		goto out;
	}

	flup = IXGBE_READ_REG(hw, IXGBE_EEC_BY_MAC(hw)) | IXGBE_EEC_FLUP;
	IXGBE_WRITE_REG(hw, IXGBE_EEC_BY_MAC(hw), flup);

	status = ixgbe_poll_flash_update_done_X540(hw);
	if (status == IXGBE_SUCCESS)
		DEBUGOUT("Flash update complete\n");
	else
		DEBUGOUT("Flash update time out\n");

	if (hw->mac.type == ixgbe_mac_X540 && hw->revision_id == 0) {
		flup = IXGBE_READ_REG(hw, IXGBE_EEC_BY_MAC(hw));

		if (flup & IXGBE_EEC_SEC1VAL) {
			flup |= IXGBE_EEC_FLUP;
			IXGBE_WRITE_REG(hw, IXGBE_EEC_BY_MAC(hw), flup);
		}

		status = ixgbe_poll_flash_update_done_X540(hw);
		if (status == IXGBE_SUCCESS)
			DEBUGOUT("Flash update complete\n");
		else
			DEBUGOUT("Flash update time out\n");
	}
out:
	return status;
}

/**
 *  ixgbe_poll_flash_update_done_X540 - Poll flash update status
 *  @hw: pointer to hardware structure
 *
 *  Polls the FLUDONE (bit 26) of the EEC Register to determine when the
 *  flash update is done.
 **/
STATIC s32 ixgbe_poll_flash_update_done_X540(struct ixgbe_hw *hw)
{
	u32 i;
	u32 reg;
	s32 status = IXGBE_ERR_EEPROM;

	DEBUGFUNC("ixgbe_poll_flash_update_done_X540");

	for (i = 0; i < IXGBE_FLUDONE_ATTEMPTS; i++) {
		reg = IXGBE_READ_REG(hw, IXGBE_EEC_BY_MAC(hw));
		if (reg & IXGBE_EEC_FLUDONE) {
			status = IXGBE_SUCCESS;
			break;
		}
		msec_delay(5);
	}

	if (i == IXGBE_FLUDONE_ATTEMPTS)
		ERROR_REPORT1(IXGBE_ERROR_POLLING,
			     "Flash update status polling timed out");

	return status;
}

/**
 *  ixgbe_acquire_swfw_sync_X540 - Acquire SWFW semaphore
 *  @hw: pointer to hardware structure
 *  @mask: Mask to specify which semaphore to acquire
 *
 *  Acquires the SWFW semaphore thought the SW_FW_SYNC register for
 *  the specified function (CSR, PHY0, PHY1, NVM, Flash)
 **/
s32 ixgbe_acquire_swfw_sync_X540(struct ixgbe_hw *hw, u32 mask)
{
	u32 swmask = mask & IXGBE_GSSR_NVM_PHY_MASK;
	u32 fwmask = swmask << 5;
	u32 swi2c_mask = mask & IXGBE_GSSR_I2C_MASK;
	u32 timeout = 200;
	u32 hwmask = 0;
	u32 swfw_sync;
	u32 i;

	DEBUGFUNC("ixgbe_acquire_swfw_sync_X540");

	if (swmask & IXGBE_GSSR_EEP_SM)
		hwmask |= IXGBE_GSSR_FLASH_SM;

	/* SW only mask doesn't have FW bit pair */
	if (mask & IXGBE_GSSR_SW_MNG_SM)
		swmask |= IXGBE_GSSR_SW_MNG_SM;

	swmask |= swi2c_mask;
	fwmask |= swi2c_mask << 2;
	if (hw->mac.type >= ixgbe_mac_X550)
		timeout = 1000;

	for (i = 0; i < timeout; i++) {
		/* SW NVM semaphore bit is used for access to all
		 * SW_FW_SYNC bits (not just NVM)
		 */
		if (ixgbe_get_swfw_sync_semaphore(hw)) {
			DEBUGOUT("Failed to get NVM access and register semaphore, returning IXGBE_ERR_SWFW_SYNC\n");
			return IXGBE_ERR_SWFW_SYNC;
		}

		swfw_sync = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC_BY_MAC(hw));
		if (!(swfw_sync & (fwmask | swmask | hwmask))) {
			swfw_sync |= swmask;
			IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC_BY_MAC(hw),
					swfw_sync);
			ixgbe_release_swfw_sync_semaphore(hw);
			return IXGBE_SUCCESS;
		}
		/* Firmware currently using resource (fwmask), hardware
		 * currently using resource (hwmask), or other software
		 * thread currently using resource (swmask)
		 */
		ixgbe_release_swfw_sync_semaphore(hw);
		msec_delay(5);
	}

	/* If the resource is not released by the FW/HW the SW can assume that
	 * the FW/HW malfunctions. In that case the SW should set the SW bit(s)
	 * of the requested resource(s) while ignoring the corresponding FW/HW
	 * bits in the SW_FW_SYNC register.
	 */
	if (ixgbe_get_swfw_sync_semaphore(hw)) {
		DEBUGOUT("Failed to get NVM sempahore and register semaphore while forcefully ignoring FW sempahore bit(s) and setting SW semaphore bit(s), returning IXGBE_ERR_SWFW_SYNC\n");
		return IXGBE_ERR_SWFW_SYNC;
	}
	swfw_sync = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC_BY_MAC(hw));
	if (swfw_sync & (fwmask | hwmask)) {
		swfw_sync |= swmask;
		IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC_BY_MAC(hw), swfw_sync);
		ixgbe_release_swfw_sync_semaphore(hw);
		msec_delay(5);
		return IXGBE_SUCCESS;
	}
	/* If the resource is not released by other SW the SW can assume that
	 * the other SW malfunctions. In that case the SW should clear all SW
	 * flags that it does not own and then repeat the whole process once
	 * again.
	 */
	if (swfw_sync & swmask) {
		u32 rmask = IXGBE_GSSR_EEP_SM | IXGBE_GSSR_PHY0_SM |
			    IXGBE_GSSR_PHY1_SM | IXGBE_GSSR_MAC_CSR_SM |
			    IXGBE_GSSR_SW_MNG_SM;

		if (swi2c_mask)
			rmask |= IXGBE_GSSR_I2C_MASK;
		ixgbe_release_swfw_sync_X540(hw, rmask);
		ixgbe_release_swfw_sync_semaphore(hw);
		DEBUGOUT("Resource not released by other SW, returning IXGBE_ERR_SWFW_SYNC\n");
		return IXGBE_ERR_SWFW_SYNC;
	}
	ixgbe_release_swfw_sync_semaphore(hw);
	DEBUGOUT("Returning error IXGBE_ERR_SWFW_SYNC\n");

	return IXGBE_ERR_SWFW_SYNC;
}

/**
 *  ixgbe_release_swfw_sync_X540 - Release SWFW semaphore
 *  @hw: pointer to hardware structure
 *  @mask: Mask to specify which semaphore to release
 *
 *  Releases the SWFW semaphore through the SW_FW_SYNC register
 *  for the specified function (CSR, PHY0, PHY1, EVM, Flash)
 **/
void ixgbe_release_swfw_sync_X540(struct ixgbe_hw *hw, u32 mask)
{
	u32 swmask = mask & (IXGBE_GSSR_NVM_PHY_MASK | IXGBE_GSSR_SW_MNG_SM);
	u32 swfw_sync;

	DEBUGFUNC("ixgbe_release_swfw_sync_X540");

	if (mask & IXGBE_GSSR_I2C_MASK)
		swmask |= mask & IXGBE_GSSR_I2C_MASK;
	ixgbe_get_swfw_sync_semaphore(hw);

	swfw_sync = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC_BY_MAC(hw));
	swfw_sync &= ~swmask;
	IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC_BY_MAC(hw), swfw_sync);

	ixgbe_release_swfw_sync_semaphore(hw);
	msec_delay(2);
}

/**
 *  ixgbe_get_swfw_sync_semaphore - Get hardware semaphore
 *  @hw: pointer to hardware structure
 *
 *  Sets the hardware semaphores so SW/FW can gain control of shared resources
 **/
STATIC s32 ixgbe_get_swfw_sync_semaphore(struct ixgbe_hw *hw)
{
	s32 status = IXGBE_ERR_EEPROM;
	u32 timeout = 2000;
	u32 i;
	u32 swsm;

	DEBUGFUNC("ixgbe_get_swfw_sync_semaphore");

	/* 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_BY_MAC(hw));
		if (!(swsm & IXGBE_SWSM_SMBI)) {
			status = IXGBE_SUCCESS;
			break;
		}
		usec_delay(50);
	}

	/* Now get the semaphore between SW/FW through the REGSMP bit */
	if (status == IXGBE_SUCCESS) {
		for (i = 0; i < timeout; i++) {
			swsm = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC_BY_MAC(hw));
			if (!(swsm & IXGBE_SWFW_REGSMP))
				break;

			usec_delay(50);
		}

		/*
		 * Release semaphores and return error if SW NVM semaphore
		 * was not granted because we don't have access to the EEPROM
		 */
		if (i >= timeout) {
			ERROR_REPORT1(IXGBE_ERROR_POLLING,
				"REGSMP Software NVM semaphore not granted.\n");
			ixgbe_release_swfw_sync_semaphore(hw);
			status = IXGBE_ERR_EEPROM;
		}
	} else {
		ERROR_REPORT1(IXGBE_ERROR_POLLING,
			     "Software semaphore SMBI between device drivers "
			     "not granted.\n");
	}

	return status;
}

/**
 *  ixgbe_release_swfw_sync_semaphore - Release hardware semaphore
 *  @hw: pointer to hardware structure
 *
 *  This function clears hardware semaphore bits.
 **/
STATIC void ixgbe_release_swfw_sync_semaphore(struct ixgbe_hw *hw)
{
	u32 swsm;

	DEBUGFUNC("ixgbe_release_swfw_sync_semaphore");

	/* Release both semaphores by writing 0 to the bits REGSMP and SMBI */

	swsm = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC_BY_MAC(hw));
	swsm &= ~IXGBE_SWFW_REGSMP;
	IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC_BY_MAC(hw), swsm);

	swsm = IXGBE_READ_REG(hw, IXGBE_SWSM_BY_MAC(hw));
	swsm &= ~IXGBE_SWSM_SMBI;
	IXGBE_WRITE_REG(hw, IXGBE_SWSM_BY_MAC(hw), swsm);

	IXGBE_WRITE_FLUSH(hw);
}

/**
 *  ixgbe_init_swfw_sync_X540 - Release hardware semaphore
 *  @hw: pointer to hardware structure
 *
 *  This function reset hardware semaphore bits for a semaphore that may
 *  have be left locked due to a catastrophic failure.
 **/
void ixgbe_init_swfw_sync_X540(struct ixgbe_hw *hw)
{
	u32 rmask;

	/* First try to grab the semaphore but we don't need to bother
	 * looking to see whether we got the lock or not since we do
	 * the same thing regardless of whether we got the lock or not.
	 * We got the lock - we release it.
	 * We timeout trying to get the lock - we force its release.
	 */
	ixgbe_get_swfw_sync_semaphore(hw);
	ixgbe_release_swfw_sync_semaphore(hw);

	/* Acquire and release all software resources. */
	rmask = IXGBE_GSSR_EEP_SM | IXGBE_GSSR_PHY0_SM |
		IXGBE_GSSR_PHY1_SM | IXGBE_GSSR_MAC_CSR_SM |
		IXGBE_GSSR_SW_MNG_SM;

	rmask |= IXGBE_GSSR_I2C_MASK;
	ixgbe_acquire_swfw_sync_X540(hw, rmask);
	ixgbe_release_swfw_sync_X540(hw, rmask);
}

/**
 * ixgbe_blink_led_start_X540 - Blink LED based on index.
 * @hw: pointer to hardware structure
 * @index: led number to blink
 *
 * Devices that implement the version 2 interface:
 *   X540
 **/
s32 ixgbe_blink_led_start_X540(struct ixgbe_hw *hw, u32 index)
{
	u32 macc_reg;
	u32 ledctl_reg;
	ixgbe_link_speed speed;
	bool link_up;

	DEBUGFUNC("ixgbe_blink_led_start_X540");

	if (index > 3)
		return IXGBE_ERR_PARAM;

	/*
	 * Link should be up in order for the blink bit in the LED control
	 * register to work. Force link and speed in the MAC if link is down.
	 * This will be reversed when we stop the blinking.
	 */
	hw->mac.ops.check_link(hw, &speed, &link_up, false);
	if (link_up == false) {
		macc_reg = IXGBE_READ_REG(hw, IXGBE_MACC);
		macc_reg |= IXGBE_MACC_FLU | IXGBE_MACC_FSV_10G | IXGBE_MACC_FS;
		IXGBE_WRITE_REG(hw, IXGBE_MACC, macc_reg);
	}
	/* Set the LED to LINK_UP + BLINK. */
	ledctl_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
	ledctl_reg &= ~IXGBE_LED_MODE_MASK(index);
	ledctl_reg |= IXGBE_LED_BLINK(index);
	IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, ledctl_reg);
	IXGBE_WRITE_FLUSH(hw);

	return IXGBE_SUCCESS;
}

/**
 * ixgbe_blink_led_stop_X540 - Stop blinking LED based on index.
 * @hw: pointer to hardware structure
 * @index: led number to stop blinking
 *
 * Devices that implement the version 2 interface:
 *   X540
 **/
s32 ixgbe_blink_led_stop_X540(struct ixgbe_hw *hw, u32 index)
{
	u32 macc_reg;
	u32 ledctl_reg;

	if (index > 3)
		return IXGBE_ERR_PARAM;

	DEBUGFUNC("ixgbe_blink_led_stop_X540");

	/* Restore the LED to its default value. */
	ledctl_reg = IXGBE_READ_REG(hw, IXGBE_LEDCTL);
	ledctl_reg &= ~IXGBE_LED_MODE_MASK(index);
	ledctl_reg |= IXGBE_LED_LINK_ACTIVE << IXGBE_LED_MODE_SHIFT(index);
	ledctl_reg &= ~IXGBE_LED_BLINK(index);
	IXGBE_WRITE_REG(hw, IXGBE_LEDCTL, ledctl_reg);

	/* Unforce link and speed in the MAC. */
	macc_reg = IXGBE_READ_REG(hw, IXGBE_MACC);
	macc_reg &= ~(IXGBE_MACC_FLU | IXGBE_MACC_FSV_10G | IXGBE_MACC_FS);
	IXGBE_WRITE_REG(hw, IXGBE_MACC, macc_reg);
	IXGBE_WRITE_FLUSH(hw);

	return IXGBE_SUCCESS;
}