// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 1999 - 2024 Intel Corporation. */

#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/sched.h>

#include "ixgbe.h"
#include "ixgbe_mbx.h"
#include "ixgbe_phy.h"
#include "ixgbe_x540.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 int ixgbe_update_flash_X540(struct ixgbe_hw *hw);
static int ixgbe_poll_flash_update_done_X540(struct ixgbe_hw *hw);
static int ixgbe_get_swfw_sync_semaphore(struct ixgbe_hw *hw);
static void ixgbe_release_swfw_sync_semaphore(struct ixgbe_hw *hw);

enum ixgbe_media_type ixgbe_get_media_type_X540(struct ixgbe_hw *hw)
{
        return ixgbe_media_type_copper;
}

int ixgbe_get_invariants_X540(struct ixgbe_hw *hw)
{
        struct ixgbe_mac_info *mac = &hw->mac;
        struct ixgbe_phy_info *phy = &hw->phy;

        /* set_phy_power was set by default to NULL */
        phy->ops.set_phy_power = ixgbe_set_copper_phy_power;

        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);

        return 0;
}

/**
 *  ixgbe_setup_mac_link_X540 - Set the auto advertised capabilities
 *  @hw: pointer to hardware structure
 *  @speed: new link speed
 *  @autoneg_wait_to_complete: true when waiting for completion is needed
 **/
int ixgbe_setup_mac_link_X540(struct ixgbe_hw *hw, ixgbe_link_speed speed,
                              bool autoneg_wait_to_complete)
{
        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, perform a PHY reset, and perform a link (MAC)
 *  reset.
 *
 *  Return: 0 on success or negative value on failure
 */
int ixgbe_reset_hw_X540(struct ixgbe_hw *hw)
{
        u32 swfw_mask = hw->phy.phy_semaphore_mask;
        u32 ctrl, i;
        int status;

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

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

mac_reset_top:
        status = hw->mac.ops.acquire_swfw_sync(hw, swfw_mask);
        if (status) {
                hw_dbg(hw, "semaphore failed with %d", status);
                return -EBUSY;
        }

        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);
        usleep_range(1000, 1200);

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

        if (ctrl & IXGBE_CTRL_RST_MASK) {
                status = -EIO;
                hw_dbg(hw, "Reset polling failed to complete.\n");
        }
        msleep(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 = IXGBE_X540_MAX_TX_QUEUES;
        hw->mac.ops.init_rx_addrs(hw);

        /* The following is not supported by E610. */
        if (hw->mac.type == ixgbe_mac_e610)
                return status;

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

        /* Add the SAN MAC address to RAR if it's a valid address */
        if (is_valid_ether_addr(hw->mac.san_addr)) {
                /* 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);

        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.
 **/
int ixgbe_start_hw_X540(struct ixgbe_hw *hw)
{
        int ret_val;

        ret_val = ixgbe_start_hw_generic(hw);
        if (ret_val)
                return ret_val;

        return ixgbe_start_hw_gen2(hw);
}

/**
 *  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.
 **/
int ixgbe_init_eeprom_params_X540(struct ixgbe_hw *hw)
{
        struct ixgbe_eeprom_info *eeprom = &hw->eeprom;

        if (eeprom->type == ixgbe_eeprom_uninitialized) {
                u16 eeprom_size;
                u32 eec;

                eeprom->semaphore_delay = 10;
                eeprom->type = ixgbe_flash;

                eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
                eeprom_size = FIELD_GET(IXGBE_EEC_SIZE, eec);
                eeprom->word_size = BIT(eeprom_size +
                                        IXGBE_EEPROM_WORD_SIZE_SHIFT);

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

        return 0;
}

/**
 *  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.
 **/
static int ixgbe_read_eerd_X540(struct ixgbe_hw *hw, u16 offset, u16 *data)
{
        int status;

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

        status = ixgbe_read_eerd_generic(hw, offset, data);

        hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
        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.
 **/
static int ixgbe_read_eerd_buffer_X540(struct ixgbe_hw *hw,
                                       u16 offset, u16 words, u16 *data)
{
        int status;

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

        status = ixgbe_read_eerd_buffer_generic(hw, offset, words, data);

        hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
        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.
 **/
static int ixgbe_write_eewr_X540(struct ixgbe_hw *hw, u16 offset, u16 data)
{
        int status;

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

        status = ixgbe_write_eewr_generic(hw, offset, data);

        hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
        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.
 **/
static int ixgbe_write_eewr_buffer_X540(struct ixgbe_hw *hw,
                                        u16 offset, u16 words, u16 *data)
{
        int status;

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

        status = ixgbe_write_eewr_buffer_generic(hw, offset, words, data);

        hw->mac.ops.release_swfw_sync(hw, IXGBE_GSSR_EEP_SM);
        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
 **/
static int ixgbe_calc_eeprom_checksum_X540(struct ixgbe_hw *hw)
{
        u16 i;
        u16 j;
        u16 checksum = 0;
        u16 length = 0;
        u16 pointer = 0;
        u16 word = 0;
        u16 checksum_last_word = IXGBE_EEPROM_CHECKSUM;
        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
         */

        /* Include 0x0-0x3F in the checksum */
        for (i = 0; i < checksum_last_word; i++) {
                if (ixgbe_read_eerd_generic(hw, i, &word)) {
                        hw_dbg(hw, "EEPROM read failed\n");
                        return -EIO;
                }
                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)) {
                        hw_dbg(hw, "EEPROM read failed\n");
                        break;
                }

                /* 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)) {
                        hw_dbg(hw, "EEPROM read failed\n");
                        return -EIO;
                }

                /* 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)) {
                                hw_dbg(hw, "EEPROM read failed\n");
                                return -EIO;
                        }
                        checksum += word;
                }
        }

        checksum = IXGBE_EEPROM_SUM - checksum;

        return 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.
 **/
static int ixgbe_validate_eeprom_checksum_X540(struct ixgbe_hw *hw,
                                               u16 *checksum_val)
{
        u16 read_checksum = 0;
        u16 checksum;
        int status;

        /* 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) {
                hw_dbg(hw, "EEPROM read failed\n");
                return status;
        }

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

        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) {
                hw_dbg(hw, "Invalid EEPROM checksum");
                status = -EIO;
        }

        /* 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.
 **/
static int ixgbe_update_eeprom_checksum_X540(struct ixgbe_hw *hw)
{
        u16 checksum;
        int status;

        /* 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) {
                hw_dbg(hw, "EEPROM read failed\n");
                return status;
        }

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

        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.
 **/
static int ixgbe_update_flash_X540(struct ixgbe_hw *hw)
{
        int status;
        u32 flup;

        status = ixgbe_poll_flash_update_done_X540(hw);
        if (status == -EIO) {
                hw_dbg(hw, "Flash update time out\n");
                return status;
        }

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

        status = ixgbe_poll_flash_update_done_X540(hw);
        if (status == 0)
                hw_dbg(hw, "Flash update complete\n");
        else
                hw_dbg(hw, "Flash update time out\n");

        if (hw->revision_id == 0) {
                flup = IXGBE_READ_REG(hw, IXGBE_EEC(hw));

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

                status = ixgbe_poll_flash_update_done_X540(hw);
                if (status == 0)
                        hw_dbg(hw, "Flash update complete\n");
                else
                        hw_dbg(hw, "Flash update time out\n");
        }

        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 int ixgbe_poll_flash_update_done_X540(struct ixgbe_hw *hw)
{
        u32 i;
        u32 reg;

        for (i = 0; i < IXGBE_FLUDONE_ATTEMPTS; i++) {
                reg = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
                if (reg & IXGBE_EEC_FLUDONE)
                        return 0;
                udelay(5);
        }
        return -EIO;
}

/**
 * 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)
 **/
int ixgbe_acquire_swfw_sync_X540(struct ixgbe_hw *hw, u32 mask)
{
        u32 swmask = mask & IXGBE_GSSR_NVM_PHY_MASK;
        u32 swi2c_mask = mask & IXGBE_GSSR_I2C_MASK;
        u32 fwmask = swmask << 5;
        u32 timeout = 200;
        u32 hwmask = 0;
        u32 swfw_sync;
        u32 i;

        if (swmask & IXGBE_GSSR_EEP_SM)
                hwmask = IXGBE_GSSR_FLASH_SM;

        /* SW only mask does not have FW bit pair */
        if (mask & IXGBE_GSSR_SW_MNG_SM)
                swmask |= IXGBE_GSSR_SW_MNG_SM;

        swmask |= swi2c_mask;
        fwmask |= swi2c_mask << 2;
        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))
                        return -EBUSY;

                swfw_sync = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC(hw));
                if (!(swfw_sync & (fwmask | swmask | hwmask))) {
                        swfw_sync |= swmask;
                        IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC(hw), swfw_sync);
                        ixgbe_release_swfw_sync_semaphore(hw);
                        usleep_range(5000, 6000);
                        return 0;
                }
                /* Firmware currently using resource (fwmask), hardware
                 * currently using resource (hwmask), or other software
                 * thread currently using resource (swmask)
                 */
                ixgbe_release_swfw_sync_semaphore(hw);
                usleep_range(5000, 10000);
        }

        /* 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))
                return -EBUSY;
        swfw_sync = IXGBE_READ_REG(hw, IXGBE_SWFW_SYNC(hw));
        if (swfw_sync & (fwmask | hwmask)) {
                swfw_sync |= swmask;
                IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC(hw), swfw_sync);
                ixgbe_release_swfw_sync_semaphore(hw);
                usleep_range(5000, 6000);
                return 0;
        }
        /* 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);
                return -EBUSY;
        }
        ixgbe_release_swfw_sync_semaphore(hw);

        return -EBUSY;
}

/**
 * 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;

        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(hw));
        swfw_sync &= ~swmask;
        IXGBE_WRITE_REG(hw, IXGBE_SWFW_SYNC(hw), swfw_sync);

        ixgbe_release_swfw_sync_semaphore(hw);
        usleep_range(5000, 6000);
}

/**
 * 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 int ixgbe_get_swfw_sync_semaphore(struct ixgbe_hw *hw)
{
        u32 timeout = 2000;
        u32 i;
        u32 swsm;

        /* 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(hw));
                if (!(swsm & IXGBE_SWSM_SMBI))
                        break;
                usleep_range(50, 100);
        }

        if (i == timeout) {
                hw_dbg(hw,
                       "Software semaphore SMBI between device drivers not granted.\n");
                return -EIO;
        }

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

                usleep_range(50, 100);
        }

        /* Release semaphores and return error if SW NVM semaphore
         * was not granted because we do not have access to the EEPROM
         */
        hw_dbg(hw, "REGSMP Software NVM semaphore not granted\n");
        ixgbe_release_swfw_sync_semaphore(hw);
        return -EIO;
}

/**
 * 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;

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

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

        swsm = IXGBE_READ_REG(hw, IXGBE_SWSM(hw));
        swsm &= ~IXGBE_SWSM_SMBI;
        IXGBE_WRITE_REG(hw, IXGBE_SWSM(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 | 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
 **/
int ixgbe_blink_led_start_X540(struct ixgbe_hw *hw, u32 index)
{
        u32 macc_reg;
        u32 ledctl_reg;
        ixgbe_link_speed speed;
        bool link_up;

        if (index > 3)
                return -EINVAL;

        /* 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) {
                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 0;
}

/**
 * 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
 **/
int ixgbe_blink_led_stop_X540(struct ixgbe_hw *hw, u32 index)
{
        u32 macc_reg;
        u32 ledctl_reg;

        if (index > 3)
                return -EINVAL;

        /* 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 0;
}
static const struct ixgbe_mac_operations mac_ops_X540 = {
        .init_hw                = &ixgbe_init_hw_generic,
        .reset_hw               = &ixgbe_reset_hw_X540,
        .start_hw               = &ixgbe_start_hw_X540,
        .clear_hw_cntrs         = &ixgbe_clear_hw_cntrs_generic,
        .get_media_type         = &ixgbe_get_media_type_X540,
        .enable_rx_dma          = &ixgbe_enable_rx_dma_generic,
        .get_mac_addr           = &ixgbe_get_mac_addr_generic,
        .get_san_mac_addr       = &ixgbe_get_san_mac_addr_generic,
        .get_device_caps        = &ixgbe_get_device_caps_generic,
        .get_wwn_prefix         = &ixgbe_get_wwn_prefix_generic,
        .stop_adapter           = &ixgbe_stop_adapter_generic,
        .get_bus_info           = &ixgbe_get_bus_info_generic,
        .set_lan_id             = &ixgbe_set_lan_id_multi_port_pcie,
        .read_analog_reg8       = NULL,
        .write_analog_reg8      = NULL,
        .setup_link             = &ixgbe_setup_mac_link_X540,
        .set_rxpba              = &ixgbe_set_rxpba_generic,
        .check_link             = &ixgbe_check_mac_link_generic,
        .get_link_capabilities  = &ixgbe_get_copper_link_capabilities_generic,
        .led_on                 = &ixgbe_led_on_generic,
        .led_off                = &ixgbe_led_off_generic,
        .init_led_link_act      = ixgbe_init_led_link_act_generic,
        .blink_led_start        = &ixgbe_blink_led_start_X540,
        .blink_led_stop         = &ixgbe_blink_led_stop_X540,
        .set_rar                = &ixgbe_set_rar_generic,
        .clear_rar              = &ixgbe_clear_rar_generic,
        .set_vmdq               = &ixgbe_set_vmdq_generic,
        .set_vmdq_san_mac       = &ixgbe_set_vmdq_san_mac_generic,
        .clear_vmdq             = &ixgbe_clear_vmdq_generic,
        .init_rx_addrs          = &ixgbe_init_rx_addrs_generic,
        .update_mc_addr_list    = &ixgbe_update_mc_addr_list_generic,
        .enable_mc              = &ixgbe_enable_mc_generic,
        .disable_mc             = &ixgbe_disable_mc_generic,
        .clear_vfta             = &ixgbe_clear_vfta_generic,
        .set_vfta               = &ixgbe_set_vfta_generic,
        .fc_enable              = &ixgbe_fc_enable_generic,
        .setup_fc               = ixgbe_setup_fc_generic,
        .fc_autoneg             = ixgbe_fc_autoneg,
        .set_fw_drv_ver         = &ixgbe_set_fw_drv_ver_generic,
        .init_uta_tables        = &ixgbe_init_uta_tables_generic,
        .setup_sfp              = NULL,
        .set_mac_anti_spoofing  = &ixgbe_set_mac_anti_spoofing,
        .set_vlan_anti_spoofing = &ixgbe_set_vlan_anti_spoofing,
        .acquire_swfw_sync      = &ixgbe_acquire_swfw_sync_X540,
        .release_swfw_sync      = &ixgbe_release_swfw_sync_X540,
        .init_swfw_sync         = &ixgbe_init_swfw_sync_X540,
        .disable_rx_buff        = &ixgbe_disable_rx_buff_generic,
        .enable_rx_buff         = &ixgbe_enable_rx_buff_generic,
        .get_thermal_sensor_data = NULL,
        .init_thermal_sensor_thresh = NULL,
        .prot_autoc_read        = &prot_autoc_read_generic,
        .prot_autoc_write       = &prot_autoc_write_generic,
        .enable_rx              = &ixgbe_enable_rx_generic,
        .disable_rx             = &ixgbe_disable_rx_generic,
};

static const struct ixgbe_eeprom_operations eeprom_ops_X540 = {
        .init_params            = &ixgbe_init_eeprom_params_X540,
        .read                   = &ixgbe_read_eerd_X540,
        .read_buffer            = &ixgbe_read_eerd_buffer_X540,
        .write                  = &ixgbe_write_eewr_X540,
        .write_buffer           = &ixgbe_write_eewr_buffer_X540,
        .calc_checksum          = &ixgbe_calc_eeprom_checksum_X540,
        .validate_checksum      = &ixgbe_validate_eeprom_checksum_X540,
        .update_checksum        = &ixgbe_update_eeprom_checksum_X540,
        .read_pba_string        = &ixgbe_read_pba_string_generic,
};

static const struct ixgbe_phy_operations phy_ops_X540 = {
        .identify               = &ixgbe_identify_phy_generic,
        .identify_sfp           = &ixgbe_identify_sfp_module_generic,
        .init                   = NULL,
        .reset                  = NULL,
        .read_reg               = &ixgbe_read_phy_reg_generic,
        .write_reg              = &ixgbe_write_phy_reg_generic,
        .setup_link             = &ixgbe_setup_phy_link_generic,
        .setup_link_speed       = &ixgbe_setup_phy_link_speed_generic,
        .read_i2c_byte          = &ixgbe_read_i2c_byte_generic,
        .write_i2c_byte         = &ixgbe_write_i2c_byte_generic,
        .read_i2c_sff8472       = &ixgbe_read_i2c_sff8472_generic,
        .read_i2c_eeprom        = &ixgbe_read_i2c_eeprom_generic,
        .write_i2c_eeprom       = &ixgbe_write_i2c_eeprom_generic,
        .check_overtemp         = &ixgbe_tn_check_overtemp,
        .set_phy_power          = &ixgbe_set_copper_phy_power,
};

static const u32 ixgbe_mvals_X540[IXGBE_MVALS_IDX_LIMIT] = {
        IXGBE_MVALS_INIT(X540)
};

const struct ixgbe_info ixgbe_X540_info = {
        .mac                    = ixgbe_mac_X540,
        .get_invariants         = &ixgbe_get_invariants_X540,
        .mac_ops                = &mac_ops_X540,
        .eeprom_ops             = &eeprom_ops_X540,
        .phy_ops                = &phy_ops_X540,
        .mbx_ops                = &mbx_ops_generic,
        .mvals                  = ixgbe_mvals_X540,
};