update sources to ceph Nautilus 14.2.1

[ceph.git] / ceph / src / seastar / dpdk / drivers / net / ixgbe / base / ixgbe_x540.c

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

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All rights reserved.

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

#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;
        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);
        }

        /* Failed to get SW only semaphore */
        if (swmask == IXGBE_GSSR_SW_MNG_SM) {
                ERROR_REPORT1(IXGBE_ERROR_POLLING,
                             "Failed to get SW only semaphore");
                DEBUGOUT("Failed to get SW only semaphore, returning IXGBE_ERR_SWFW_SYNC\n");
                return IXGBE_ERR_SWFW_SYNC;
        }

        /* 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;

                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)
{
        /* 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);
}

/**
 * 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;
}