/*
 * Copyright (c) 2003-2008 Chelsio, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - 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.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#include "common.h"
#include "regs.h"
#include "sge_defs.h"
#include "firmware_exports.h"

static void t3_port_intr_clear(struct adapter *adapter, int idx);

/**
 *      t3_wait_op_done_val - wait until an operation is completed
 *      @adapter: the adapter performing the operation
 *      @reg: the register to check for completion
 *      @mask: a single-bit field within @reg that indicates completion
 *      @polarity: the value of the field when the operation is completed
 *      @attempts: number of check iterations
 *      @delay: delay in usecs between iterations
 *      @valp: where to store the value of the register at completion time
 *
 *      Wait until an operation is completed by checking a bit in a register
 *      up to @attempts times.  If @valp is not NULL the value of the register
 *      at the time it indicated completion is stored there.  Returns 0 if the
 *      operation completes and -EAGAIN otherwise.
 */

int t3_wait_op_done_val(struct adapter *adapter, int reg, u32 mask,
                        int polarity, int attempts, int delay, u32 *valp)
{
        while (1) {
                u32 val = t3_read_reg(adapter, reg);

                if (!!(val & mask) == polarity) {
                        if (valp)
                                *valp = val;
                        return 0;
                }
                if (--attempts == 0)
                        return -EAGAIN;
                if (delay)
                        udelay(delay);
        }
}

/**
 *      t3_write_regs - write a bunch of registers
 *      @adapter: the adapter to program
 *      @p: an array of register address/register value pairs
 *      @n: the number of address/value pairs
 *      @offset: register address offset
 *
 *      Takes an array of register address/register value pairs and writes each
 *      value to the corresponding register.  Register addresses are adjusted
 *      by the supplied offset.
 */
void t3_write_regs(struct adapter *adapter, const struct addr_val_pair *p,
                   int n, unsigned int offset)
{
        while (n--) {
                t3_write_reg(adapter, p->reg_addr + offset, p->val);
                p++;
        }
}

/**
 *      t3_set_reg_field - set a register field to a value
 *      @adapter: the adapter to program
 *      @addr: the register address
 *      @mask: specifies the portion of the register to modify
 *      @val: the new value for the register field
 *
 *      Sets a register field specified by the supplied mask to the
 *      given value.
 */
void t3_set_reg_field(struct adapter *adapter, unsigned int addr, u32 mask,
                      u32 val)
{
        u32 v = t3_read_reg(adapter, addr) & ~mask;

        t3_write_reg(adapter, addr, v | val);
        t3_read_reg(adapter, addr);     /* flush */
}

/**
 *      t3_read_indirect - read indirectly addressed registers
 *      @adap: the adapter
 *      @addr_reg: register holding the indirect address
 *      @data_reg: register holding the value of the indirect register
 *      @vals: where the read register values are stored
 *      @start_idx: index of first indirect register to read
 *      @nregs: how many indirect registers to read
 *
 *      Reads registers that are accessed indirectly through an address/data
 *      register pair.
 */
static void t3_read_indirect(struct adapter *adap, unsigned int addr_reg,
                             unsigned int data_reg, u32 *vals,
                             unsigned int nregs, unsigned int start_idx)
{
        while (nregs--) {
                t3_write_reg(adap, addr_reg, start_idx);
                *vals++ = t3_read_reg(adap, data_reg);
                start_idx++;
        }
}

/**
 *      t3_mc7_bd_read - read from MC7 through backdoor accesses
 *      @mc7: identifies MC7 to read from
 *      @start: index of first 64-bit word to read
 *      @n: number of 64-bit words to read
 *      @buf: where to store the read result
 *
 *      Read n 64-bit words from MC7 starting at word start, using backdoor
 *      accesses.
 */
int t3_mc7_bd_read(struct mc7 *mc7, unsigned int start, unsigned int n,
                   u64 *buf)
{
        static const int shift[] = { 0, 0, 16, 24 };
        static const int step[] = { 0, 32, 16, 8 };

        unsigned int size64 = mc7->size / 8;    /* # of 64-bit words */
        struct adapter *adap = mc7->adapter;

        if (start >= size64 || start + n > size64)
                return -EINVAL;

        start *= (8 << mc7->width);
        while (n--) {
                int i;
                u64 val64 = 0;

                for (i = (1 << mc7->width) - 1; i >= 0; --i) {
                        int attempts = 10;
                        u32 val;

                        t3_write_reg(adap, mc7->offset + A_MC7_BD_ADDR, start);
                        t3_write_reg(adap, mc7->offset + A_MC7_BD_OP, 0);
                        val = t3_read_reg(adap, mc7->offset + A_MC7_BD_OP);
                        while ((val & F_BUSY) && attempts--)
                                val = t3_read_reg(adap,
                                                  mc7->offset + A_MC7_BD_OP);
                        if (val & F_BUSY)
                                return -EIO;

                        val = t3_read_reg(adap, mc7->offset + A_MC7_BD_DATA1);
                        if (mc7->width == 0) {
                                val64 = t3_read_reg(adap,
                                                    mc7->offset +
                                                    A_MC7_BD_DATA0);
                                val64 |= (u64) val << 32;
                        } else {
                                if (mc7->width > 1)
                                        val >>= shift[mc7->width];
                                val64 |= (u64) val << (step[mc7->width] * i);
                        }
                        start += 8;
                }
                *buf++ = val64;
        }
        return 0;
}

/*
 * Initialize MI1.
 */
static void mi1_init(struct adapter *adap, const struct adapter_info *ai)
{
        u32 clkdiv = adap->params.vpd.cclk / (2 * adap->params.vpd.mdc) - 1;
        u32 val = F_PREEN | V_CLKDIV(clkdiv);

        t3_write_reg(adap, A_MI1_CFG, val);
}

#define MDIO_ATTEMPTS 20

/*
 * MI1 read/write operations for clause 22 PHYs.
 */
static int t3_mi1_read(struct net_device *dev, int phy_addr, int mmd_addr,
                       u16 reg_addr)
{
        struct port_info *pi = netdev_priv(dev);
        struct adapter *adapter = pi->adapter;
        int ret;
        u32 addr = V_REGADDR(reg_addr) | V_PHYADDR(phy_addr);

        mutex_lock(&adapter->mdio_lock);
        t3_set_reg_field(adapter, A_MI1_CFG, V_ST(M_ST), V_ST(1));
        t3_write_reg(adapter, A_MI1_ADDR, addr);
        t3_write_reg(adapter, A_MI1_OP, V_MDI_OP(2));
        ret = t3_wait_op_done(adapter, A_MI1_OP, F_BUSY, 0, MDIO_ATTEMPTS, 10);
        if (!ret)
                ret = t3_read_reg(adapter, A_MI1_DATA);
        mutex_unlock(&adapter->mdio_lock);
        return ret;
}

static int t3_mi1_write(struct net_device *dev, int phy_addr, int mmd_addr,
                        u16 reg_addr, u16 val)
{
        struct port_info *pi = netdev_priv(dev);
        struct adapter *adapter = pi->adapter;
        int ret;
        u32 addr = V_REGADDR(reg_addr) | V_PHYADDR(phy_addr);

        mutex_lock(&adapter->mdio_lock);
        t3_set_reg_field(adapter, A_MI1_CFG, V_ST(M_ST), V_ST(1));
        t3_write_reg(adapter, A_MI1_ADDR, addr);
        t3_write_reg(adapter, A_MI1_DATA, val);
        t3_write_reg(adapter, A_MI1_OP, V_MDI_OP(1));
        ret = t3_wait_op_done(adapter, A_MI1_OP, F_BUSY, 0, MDIO_ATTEMPTS, 10);
        mutex_unlock(&adapter->mdio_lock);
        return ret;
}

static const struct mdio_ops mi1_mdio_ops = {
        .read = t3_mi1_read,
        .write = t3_mi1_write,
        .mode_support = MDIO_SUPPORTS_C22
};

/*
 * Performs the address cycle for clause 45 PHYs.
 * Must be called with the MDIO_LOCK held.
 */
static int mi1_wr_addr(struct adapter *adapter, int phy_addr, int mmd_addr,
                       int reg_addr)
{
        u32 addr = V_REGADDR(mmd_addr) | V_PHYADDR(phy_addr);

        t3_set_reg_field(adapter, A_MI1_CFG, V_ST(M_ST), 0);
        t3_write_reg(adapter, A_MI1_ADDR, addr);
        t3_write_reg(adapter, A_MI1_DATA, reg_addr);
        t3_write_reg(adapter, A_MI1_OP, V_MDI_OP(0));
        return t3_wait_op_done(adapter, A_MI1_OP, F_BUSY, 0,
                               MDIO_ATTEMPTS, 10);
}

/*
 * MI1 read/write operations for indirect-addressed PHYs.
 */
static int mi1_ext_read(struct net_device *dev, int phy_addr, int mmd_addr,
                        u16 reg_addr)
{
        struct port_info *pi = netdev_priv(dev);
        struct adapter *adapter = pi->adapter;
        int ret;

        mutex_lock(&adapter->mdio_lock);
        ret = mi1_wr_addr(adapter, phy_addr, mmd_addr, reg_addr);
        if (!ret) {
                t3_write_reg(adapter, A_MI1_OP, V_MDI_OP(3));
                ret = t3_wait_op_done(adapter, A_MI1_OP, F_BUSY, 0,
                                      MDIO_ATTEMPTS, 10);
                if (!ret)
                        ret = t3_read_reg(adapter, A_MI1_DATA);
        }
        mutex_unlock(&adapter->mdio_lock);
        return ret;
}

static int mi1_ext_write(struct net_device *dev, int phy_addr, int mmd_addr,
                         u16 reg_addr, u16 val)
{
        struct port_info *pi = netdev_priv(dev);
        struct adapter *adapter = pi->adapter;
        int ret;

        mutex_lock(&adapter->mdio_lock);
        ret = mi1_wr_addr(adapter, phy_addr, mmd_addr, reg_addr);
        if (!ret) {
                t3_write_reg(adapter, A_MI1_DATA, val);
                t3_write_reg(adapter, A_MI1_OP, V_MDI_OP(1));
                ret = t3_wait_op_done(adapter, A_MI1_OP, F_BUSY, 0,
                                      MDIO_ATTEMPTS, 10);
        }
        mutex_unlock(&adapter->mdio_lock);
        return ret;
}

static const struct mdio_ops mi1_mdio_ext_ops = {
        .read = mi1_ext_read,
        .write = mi1_ext_write,
        .mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22
};

/**
 *      t3_mdio_change_bits - modify the value of a PHY register
 *      @phy: the PHY to operate on
 *      @mmd: the device address
 *      @reg: the register address
 *      @clear: what part of the register value to mask off
 *      @set: what part of the register value to set
 *
 *      Changes the value of a PHY register by applying a mask to its current
 *      value and ORing the result with a new value.
 */
int t3_mdio_change_bits(struct cphy *phy, int mmd, int reg, unsigned int clear,
                        unsigned int set)
{
        int ret;
        unsigned int val;

        ret = t3_mdio_read(phy, mmd, reg, &val);
        if (!ret) {
                val &= ~clear;
                ret = t3_mdio_write(phy, mmd, reg, val | set);
        }
        return ret;
}

/**
 *      t3_phy_reset - reset a PHY block
 *      @phy: the PHY to operate on
 *      @mmd: the device address of the PHY block to reset
 *      @wait: how long to wait for the reset to complete in 1ms increments
 *
 *      Resets a PHY block and optionally waits for the reset to complete.
 *      @mmd should be 0 for 10/100/1000 PHYs and the device address to reset
 *      for 10G PHYs.
 */
int t3_phy_reset(struct cphy *phy, int mmd, int wait)
{
        int err;
        unsigned int ctl;

        err = t3_mdio_change_bits(phy, mmd, MDIO_CTRL1, MDIO_CTRL1_LPOWER,
                                  MDIO_CTRL1_RESET);
        if (err || !wait)
                return err;

        do {
                err = t3_mdio_read(phy, mmd, MDIO_CTRL1, &ctl);
                if (err)
                        return err;
                ctl &= MDIO_CTRL1_RESET;
                if (ctl)
                        msleep(1);
        } while (ctl && --wait);

        return ctl ? -1 : 0;
}

/**
 *      t3_phy_advertise - set the PHY advertisement registers for autoneg
 *      @phy: the PHY to operate on
 *      @advert: bitmap of capabilities the PHY should advertise
 *
 *      Sets a 10/100/1000 PHY's advertisement registers to advertise the
 *      requested capabilities.
 */
int t3_phy_advertise(struct cphy *phy, unsigned int advert)
{
        int err;
        unsigned int val = 0;

        err = t3_mdio_read(phy, MDIO_DEVAD_NONE, MII_CTRL1000, &val);
        if (err)
                return err;

        val &= ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
        if (advert & ADVERTISED_1000baseT_Half)
                val |= ADVERTISE_1000HALF;
        if (advert & ADVERTISED_1000baseT_Full)
                val |= ADVERTISE_1000FULL;

        err = t3_mdio_write(phy, MDIO_DEVAD_NONE, MII_CTRL1000, val);
        if (err)
                return err;

        val = 1;
        if (advert & ADVERTISED_10baseT_Half)
                val |= ADVERTISE_10HALF;
        if (advert & ADVERTISED_10baseT_Full)
                val |= ADVERTISE_10FULL;
        if (advert & ADVERTISED_100baseT_Half)
                val |= ADVERTISE_100HALF;
        if (advert & ADVERTISED_100baseT_Full)
                val |= ADVERTISE_100FULL;
        if (advert & ADVERTISED_Pause)
                val |= ADVERTISE_PAUSE_CAP;
        if (advert & ADVERTISED_Asym_Pause)
                val |= ADVERTISE_PAUSE_ASYM;
        return t3_mdio_write(phy, MDIO_DEVAD_NONE, MII_ADVERTISE, val);
}

/**
 *      t3_phy_advertise_fiber - set fiber PHY advertisement register
 *      @phy: the PHY to operate on
 *      @advert: bitmap of capabilities the PHY should advertise
 *
 *      Sets a fiber PHY's advertisement register to advertise the
 *      requested capabilities.
 */
int t3_phy_advertise_fiber(struct cphy *phy, unsigned int advert)
{
        unsigned int val = 0;

        if (advert & ADVERTISED_1000baseT_Half)
                val |= ADVERTISE_1000XHALF;
        if (advert & ADVERTISED_1000baseT_Full)
                val |= ADVERTISE_1000XFULL;
        if (advert & ADVERTISED_Pause)
                val |= ADVERTISE_1000XPAUSE;
        if (advert & ADVERTISED_Asym_Pause)
                val |= ADVERTISE_1000XPSE_ASYM;
        return t3_mdio_write(phy, MDIO_DEVAD_NONE, MII_ADVERTISE, val);
}

/**
 *      t3_set_phy_speed_duplex - force PHY speed and duplex
 *      @phy: the PHY to operate on
 *      @speed: requested PHY speed
 *      @duplex: requested PHY duplex
 *
 *      Force a 10/100/1000 PHY's speed and duplex.  This also disables
 *      auto-negotiation except for GigE, where auto-negotiation is mandatory.
 */
int t3_set_phy_speed_duplex(struct cphy *phy, int speed, int duplex)
{
        int err;
        unsigned int ctl;

        err = t3_mdio_read(phy, MDIO_DEVAD_NONE, MII_BMCR, &ctl);
        if (err)
                return err;

        if (speed >= 0) {
                ctl &= ~(BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
                if (speed == SPEED_100)
                        ctl |= BMCR_SPEED100;
                else if (speed == SPEED_1000)
                        ctl |= BMCR_SPEED1000;
        }
        if (duplex >= 0) {
                ctl &= ~(BMCR_FULLDPLX | BMCR_ANENABLE);
                if (duplex == DUPLEX_FULL)
                        ctl |= BMCR_FULLDPLX;
        }
        if (ctl & BMCR_SPEED1000) /* auto-negotiation required for GigE */
                ctl |= BMCR_ANENABLE;
        return t3_mdio_write(phy, MDIO_DEVAD_NONE, MII_BMCR, ctl);
}

int t3_phy_lasi_intr_enable(struct cphy *phy)
{
        return t3_mdio_write(phy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_CTRL,
                             MDIO_PMA_LASI_LSALARM);
}

int t3_phy_lasi_intr_disable(struct cphy *phy)
{
        return t3_mdio_write(phy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_CTRL, 0);
}

int t3_phy_lasi_intr_clear(struct cphy *phy)
{
        u32 val;

        return t3_mdio_read(phy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_STAT, &val);
}

int t3_phy_lasi_intr_handler(struct cphy *phy)
{
        unsigned int status;
        int err = t3_mdio_read(phy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_STAT,
                               &status);

        if (err)
                return err;
        return (status & MDIO_PMA_LASI_LSALARM) ? cphy_cause_link_change : 0;
}

static const struct adapter_info t3_adap_info[] = {
        {1, 1, 0,
         F_GPIO2_OEN | F_GPIO4_OEN |
         F_GPIO2_OUT_VAL | F_GPIO4_OUT_VAL, { S_GPIO3, S_GPIO5 }, 0,
         &mi1_mdio_ops, "Chelsio PE9000"},
        {1, 1, 0,
         F_GPIO2_OEN | F_GPIO4_OEN |
         F_GPIO2_OUT_VAL | F_GPIO4_OUT_VAL, { S_GPIO3, S_GPIO5 }, 0,
         &mi1_mdio_ops, "Chelsio T302"},
        {1, 0, 0,
         F_GPIO1_OEN | F_GPIO6_OEN | F_GPIO7_OEN | F_GPIO10_OEN |
         F_GPIO11_OEN | F_GPIO1_OUT_VAL | F_GPIO6_OUT_VAL | F_GPIO10_OUT_VAL,
         { 0 }, SUPPORTED_10000baseT_Full | SUPPORTED_AUI,
         &mi1_mdio_ext_ops, "Chelsio T310"},
        {1, 1, 0,
         F_GPIO1_OEN | F_GPIO2_OEN | F_GPIO4_OEN | F_GPIO5_OEN | F_GPIO6_OEN |
         F_GPIO7_OEN | F_GPIO10_OEN | F_GPIO11_OEN | F_GPIO1_OUT_VAL |
         F_GPIO5_OUT_VAL | F_GPIO6_OUT_VAL | F_GPIO10_OUT_VAL,
         { S_GPIO9, S_GPIO3 }, SUPPORTED_10000baseT_Full | SUPPORTED_AUI,
         &mi1_mdio_ext_ops, "Chelsio T320"},
        {},
        {},
        {1, 0, 0,
         F_GPIO1_OEN | F_GPIO2_OEN | F_GPIO4_OEN | F_GPIO6_OEN | F_GPIO7_OEN |
         F_GPIO10_OEN | F_GPIO1_OUT_VAL | F_GPIO6_OUT_VAL | F_GPIO10_OUT_VAL,
         { S_GPIO9 }, SUPPORTED_10000baseT_Full | SUPPORTED_AUI,
         &mi1_mdio_ext_ops, "Chelsio T310" },
        {1, 0, 0,
         F_GPIO1_OEN | F_GPIO6_OEN | F_GPIO7_OEN |
         F_GPIO1_OUT_VAL | F_GPIO6_OUT_VAL,
         { S_GPIO9 }, SUPPORTED_10000baseT_Full | SUPPORTED_AUI,
         &mi1_mdio_ext_ops, "Chelsio N320E-G2" },
};

/*
 * Return the adapter_info structure with a given index.  Out-of-range indices
 * return NULL.
 */
const struct adapter_info *t3_get_adapter_info(unsigned int id)
{
        return id < ARRAY_SIZE(t3_adap_info) ? &t3_adap_info[id] : NULL;
}

struct port_type_info {
        int (*phy_prep)(struct cphy *phy, struct adapter *adapter,
                        int phy_addr, const struct mdio_ops *ops);
};

static const struct port_type_info port_types[] = {
        { NULL },
        { t3_ael1002_phy_prep },
        { t3_vsc8211_phy_prep },
        { NULL},
        { t3_xaui_direct_phy_prep },
        { t3_ael2005_phy_prep },
        { t3_qt2045_phy_prep },
        { t3_ael1006_phy_prep },
        { NULL },
        { t3_aq100x_phy_prep },
        { t3_ael2020_phy_prep },
};

#define VPD_ENTRY(name, len) \
        u8 name##_kword[2]; u8 name##_len; u8 name##_data[len]

/*
 * Partial EEPROM Vital Product Data structure.  Includes only the ID and
 * VPD-R sections.
 */
struct t3_vpd {
        u8 id_tag;
        u8 id_len[2];
        u8 id_data[16];
        u8 vpdr_tag;
        u8 vpdr_len[2];
        VPD_ENTRY(pn, 16);      /* part number */
        VPD_ENTRY(ec, 16);      /* EC level */
        VPD_ENTRY(sn, SERNUM_LEN); /* serial number */
        VPD_ENTRY(na, 12);      /* MAC address base */
        VPD_ENTRY(cclk, 6);     /* core clock */
        VPD_ENTRY(mclk, 6);     /* mem clock */
        VPD_ENTRY(uclk, 6);     /* uP clk */
        VPD_ENTRY(mdc, 6);      /* MDIO clk */
        VPD_ENTRY(mt, 2);       /* mem timing */
        VPD_ENTRY(xaui0cfg, 6); /* XAUI0 config */
        VPD_ENTRY(xaui1cfg, 6); /* XAUI1 config */
        VPD_ENTRY(port0, 2);    /* PHY0 complex */
        VPD_ENTRY(port1, 2);    /* PHY1 complex */
        VPD_ENTRY(port2, 2);    /* PHY2 complex */
        VPD_ENTRY(port3, 2);    /* PHY3 complex */
        VPD_ENTRY(rv, 1);       /* csum */
        u32 pad;                /* for multiple-of-4 sizing and alignment */
};

#define EEPROM_MAX_POLL   40
#define EEPROM_STAT_ADDR  0x4000
#define VPD_BASE          0xc00

/**
 *      t3_seeprom_read - read a VPD EEPROM location
 *      @adapter: adapter to read
 *      @addr: EEPROM address
 *      @data: where to store the read data
 *
 *      Read a 32-bit word from a location in VPD EEPROM using the card's PCI
 *      VPD ROM capability.  A zero is written to the flag bit when the
 *      address is written to the control register.  The hardware device will
 *      set the flag to 1 when 4 bytes have been read into the data register.
 */
int t3_seeprom_read(struct adapter *adapter, u32 addr, __le32 *data)
{
        u16 val;
        int attempts = EEPROM_MAX_POLL;
        u32 v;
        unsigned int base = adapter->params.pci.vpd_cap_addr;

        if ((addr >= EEPROMSIZE && addr != EEPROM_STAT_ADDR) || (addr & 3))
                return -EINVAL;

        pci_write_config_word(adapter->pdev, base + PCI_VPD_ADDR, addr);
        do {
                udelay(10);
                pci_read_config_word(adapter->pdev, base + PCI_VPD_ADDR, &val);
        } while (!(val & PCI_VPD_ADDR_F) && --attempts);

        if (!(val & PCI_VPD_ADDR_F)) {
                CH_ERR(adapter, "reading EEPROM address 0x%x failed\n", addr);
                return -EIO;
        }
        pci_read_config_dword(adapter->pdev, base + PCI_VPD_DATA, &v);
        *data = cpu_to_le32(v);
        return 0;
}

/**
 *      t3_seeprom_write - write a VPD EEPROM location
 *      @adapter: adapter to write
 *      @addr: EEPROM address
 *      @data: value to write
 *
 *      Write a 32-bit word to a location in VPD EEPROM using the card's PCI
 *      VPD ROM capability.
 */
int t3_seeprom_write(struct adapter *adapter, u32 addr, __le32 data)
{
        u16 val;
        int attempts = EEPROM_MAX_POLL;
        unsigned int base = adapter->params.pci.vpd_cap_addr;

        if ((addr >= EEPROMSIZE && addr != EEPROM_STAT_ADDR) || (addr & 3))
                return -EINVAL;

        pci_write_config_dword(adapter->pdev, base + PCI_VPD_DATA,
                               le32_to_cpu(data));
        pci_write_config_word(adapter->pdev,base + PCI_VPD_ADDR,
                              addr | PCI_VPD_ADDR_F);
        do {
                msleep(1);
                pci_read_config_word(adapter->pdev, base + PCI_VPD_ADDR, &val);
        } while ((val & PCI_VPD_ADDR_F) && --attempts);

        if (val & PCI_VPD_ADDR_F) {
                CH_ERR(adapter, "write to EEPROM address 0x%x failed\n", addr);
                return -EIO;
        }
        return 0;
}

/**
 *      t3_seeprom_wp - enable/disable EEPROM write protection
 *      @adapter: the adapter
 *      @enable: 1 to enable write protection, 0 to disable it
 *
 *      Enables or disables write protection on the serial EEPROM.
 */
int t3_seeprom_wp(struct adapter *adapter, int enable)
{
        return t3_seeprom_write(adapter, EEPROM_STAT_ADDR, enable ? 0xc : 0);
}

static int vpdstrtouint(char *s, int len, unsigned int base, unsigned int *val)
{
        char tok[len + 1];

        memcpy(tok, s, len);
        tok[len] = 0;
        return kstrtouint(strim(tok), base, val);
}

static int vpdstrtou16(char *s, int len, unsigned int base, u16 *val)
{
        char tok[len + 1];

        memcpy(tok, s, len);
        tok[len] = 0;
        return kstrtou16(strim(tok), base, val);
}

/**
 *      get_vpd_params - read VPD parameters from VPD EEPROM
 *      @adapter: adapter to read
 *      @p: where to store the parameters
 *
 *      Reads card parameters stored in VPD EEPROM.
 */
static int get_vpd_params(struct adapter *adapter, struct vpd_params *p)
{
        int i, addr, ret;
        struct t3_vpd vpd;

        /*
         * Card information is normally at VPD_BASE but some early cards had
         * it at 0.
         */
        ret = t3_seeprom_read(adapter, VPD_BASE, (__le32 *)&vpd);
        if (ret)
                return ret;
        addr = vpd.id_tag == 0x82 ? VPD_BASE : 0;

        for (i = 0; i < sizeof(vpd); i += 4) {
                ret = t3_seeprom_read(adapter, addr + i,
                                      (__le32 *)((u8 *)&vpd + i));
                if (ret)
                        return ret;
        }

        ret = vpdstrtouint(vpd.cclk_data, vpd.cclk_len, 10, &p->cclk);
        if (ret)
                return ret;
        ret = vpdstrtouint(vpd.mclk_data, vpd.mclk_len, 10, &p->mclk);
        if (ret)
                return ret;
        ret = vpdstrtouint(vpd.uclk_data, vpd.uclk_len, 10, &p->uclk);
        if (ret)
                return ret;
        ret = vpdstrtouint(vpd.mdc_data, vpd.mdc_len, 10, &p->mdc);
        if (ret)
                return ret;
        ret = vpdstrtouint(vpd.mt_data, vpd.mt_len, 10, &p->mem_timing);
        if (ret)
                return ret;
        memcpy(p->sn, vpd.sn_data, SERNUM_LEN);

        /* Old eeproms didn't have port information */
        if (adapter->params.rev == 0 && !vpd.port0_data[0]) {
                p->port_type[0] = uses_xaui(adapter) ? 1 : 2;
                p->port_type[1] = uses_xaui(adapter) ? 6 : 2;
        } else {
                p->port_type[0] = hex_to_bin(vpd.port0_data[0]);
                p->port_type[1] = hex_to_bin(vpd.port1_data[0]);
                ret = vpdstrtou16(vpd.xaui0cfg_data, vpd.xaui0cfg_len, 16,
                                  &p->xauicfg[0]);
                if (ret)
                        return ret;
                ret = vpdstrtou16(vpd.xaui1cfg_data, vpd.xaui1cfg_len, 16,
                                  &p->xauicfg[1]);
                if (ret)
                        return ret;
        }

        ret = hex2bin(p->eth_base, vpd.na_data, 6);
        if (ret < 0)
                return -EINVAL;
        return 0;
}

/* serial flash and firmware constants */
enum {
        SF_ATTEMPTS = 5,        /* max retries for SF1 operations */
        SF_SEC_SIZE = 64 * 1024,        /* serial flash sector size */
        SF_SIZE = SF_SEC_SIZE * 8,      /* serial flash size */

        /* flash command opcodes */
        SF_PROG_PAGE = 2,       /* program page */
        SF_WR_DISABLE = 4,      /* disable writes */
        SF_RD_STATUS = 5,       /* read status register */
        SF_WR_ENABLE = 6,       /* enable writes */
        SF_RD_DATA_FAST = 0xb,  /* read flash */
        SF_ERASE_SECTOR = 0xd8, /* erase sector */

        FW_FLASH_BOOT_ADDR = 0x70000,   /* start address of FW in flash */
        FW_VERS_ADDR = 0x7fffc,    /* flash address holding FW version */
        FW_MIN_SIZE = 8            /* at least version and csum */
};

/**
 *      sf1_read - read data from the serial flash
 *      @adapter: the adapter
 *      @byte_cnt: number of bytes to read
 *      @cont: whether another operation will be chained
 *      @valp: where to store the read data
 *
 *      Reads up to 4 bytes of data from the serial flash.  The location of
 *      the read needs to be specified prior to calling this by issuing the
 *      appropriate commands to the serial flash.
 */
static int sf1_read(struct adapter *adapter, unsigned int byte_cnt, int cont,
                    u32 *valp)
{
        int ret;

        if (!byte_cnt || byte_cnt > 4)
                return -EINVAL;
        if (t3_read_reg(adapter, A_SF_OP) & F_BUSY)
                return -EBUSY;
        t3_write_reg(adapter, A_SF_OP, V_CONT(cont) | V_BYTECNT(byte_cnt - 1));
        ret = t3_wait_op_done(adapter, A_SF_OP, F_BUSY, 0, SF_ATTEMPTS, 10);
        if (!ret)
                *valp = t3_read_reg(adapter, A_SF_DATA);
        return ret;
}

/**
 *      sf1_write - write data to the serial flash
 *      @adapter: the adapter
 *      @byte_cnt: number of bytes to write
 *      @cont: whether another operation will be chained
 *      @val: value to write
 *
 *      Writes up to 4 bytes of data to the serial flash.  The location of
 *      the write needs to be specified prior to calling this by issuing the
 *      appropriate commands to the serial flash.
 */
static int sf1_write(struct adapter *adapter, unsigned int byte_cnt, int cont,
                     u32 val)
{
        if (!byte_cnt || byte_cnt > 4)
                return -EINVAL;
        if (t3_read_reg(adapter, A_SF_OP) & F_BUSY)
                return -EBUSY;
        t3_write_reg(adapter, A_SF_DATA, val);
        t3_write_reg(adapter, A_SF_OP,
                     V_CONT(cont) | V_BYTECNT(byte_cnt - 1) | V_OP(1));
        return t3_wait_op_done(adapter, A_SF_OP, F_BUSY, 0, SF_ATTEMPTS, 10);
}

/**
 *      flash_wait_op - wait for a flash operation to complete
 *      @adapter: the adapter
 *      @attempts: max number of polls of the status register
 *      @delay: delay between polls in ms
 *
 *      Wait for a flash operation to complete by polling the status register.
 */
static int flash_wait_op(struct adapter *adapter, int attempts, int delay)
{
        int ret;
        u32 status;

        while (1) {
                if ((ret = sf1_write(adapter, 1, 1, SF_RD_STATUS)) != 0 ||
                    (ret = sf1_read(adapter, 1, 0, &status)) != 0)
                        return ret;
                if (!(status & 1))
                        return 0;
                if (--attempts == 0)
                        return -EAGAIN;
                if (delay)
                        msleep(delay);
        }
}

/**
 *      t3_read_flash - read words from serial flash
 *      @adapter: the adapter
 *      @addr: the start address for the read
 *      @nwords: how many 32-bit words to read
 *      @data: where to store the read data
 *      @byte_oriented: whether to store data as bytes or as words
 *
 *      Read the specified number of 32-bit words from the serial flash.
 *      If @byte_oriented is set the read data is stored as a byte array
 *      (i.e., big-endian), otherwise as 32-bit words in the platform's
 *      natural endianness.
 */
static int t3_read_flash(struct adapter *adapter, unsigned int addr,
                         unsigned int nwords, u32 *data, int byte_oriented)
{
        int ret;

        if (addr + nwords * sizeof(u32) > SF_SIZE || (addr & 3))
                return -EINVAL;

        addr = swab32(addr) | SF_RD_DATA_FAST;

        if ((ret = sf1_write(adapter, 4, 1, addr)) != 0 ||
            (ret = sf1_read(adapter, 1, 1, data)) != 0)
                return ret;

        for (; nwords; nwords--, data++) {
                ret = sf1_read(adapter, 4, nwords > 1, data);
                if (ret)
                        return ret;
                if (byte_oriented)
                        *data = htonl(*data);
        }
        return 0;
}

/**
 *      t3_write_flash - write up to a page of data to the serial flash
 *      @adapter: the adapter
 *      @addr: the start address to write
 *      @n: length of data to write
 *      @data: the data to write
 *
 *      Writes up to a page of data (256 bytes) to the serial flash starting
 *      at the given address.
 */
static int t3_write_flash(struct adapter *adapter, unsigned int addr,
                          unsigned int n, const u8 *data)
{
        int ret;
        u32 buf[64];
        unsigned int i, c, left, val, offset = addr & 0xff;

        if (addr + n > SF_SIZE || offset + n > 256)
                return -EINVAL;

        val = swab32(addr) | SF_PROG_PAGE;

        if ((ret = sf1_write(adapter, 1, 0, SF_WR_ENABLE)) != 0 ||
            (ret = sf1_write(adapter, 4, 1, val)) != 0)
                return ret;

        for (left = n; left; left -= c) {
                c = min(left, 4U);
                for (val = 0, i = 0; i < c; ++i)
                        val = (val << 8) + *data++;

                ret = sf1_write(adapter, c, c != left, val);
                if (ret)
                        return ret;
        }
        if ((ret = flash_wait_op(adapter, 5, 1)) != 0)
                return ret;

        /* Read the page to verify the write succeeded */
        ret = t3_read_flash(adapter, addr & ~0xff, ARRAY_SIZE(buf), buf, 1);
        if (ret)
                return ret;

        if (memcmp(data - n, (u8 *) buf + offset, n))
                return -EIO;
        return 0;
}

/**
 *      t3_get_tp_version - read the tp sram version
 *      @adapter: the adapter
 *      @vers: where to place the version
 *
 *      Reads the protocol sram version from sram.
 */
int t3_get_tp_version(struct adapter *adapter, u32 *vers)
{
        int ret;

        /* Get version loaded in SRAM */
        t3_write_reg(adapter, A_TP_EMBED_OP_FIELD0, 0);
        ret = t3_wait_op_done(adapter, A_TP_EMBED_OP_FIELD0,
                              1, 1, 5, 1);
        if (ret)
                return ret;

        *vers = t3_read_reg(adapter, A_TP_EMBED_OP_FIELD1);

        return 0;
}

/**
 *      t3_check_tpsram_version - read the tp sram version
 *      @adapter: the adapter
 *
 *      Reads the protocol sram version from flash.
 */
int t3_check_tpsram_version(struct adapter *adapter)
{
        int ret;
        u32 vers;
        unsigned int major, minor;

        if (adapter->params.rev == T3_REV_A)
                return 0;


        ret = t3_get_tp_version(adapter, &vers);
        if (ret)
                return ret;

        major = G_TP_VERSION_MAJOR(vers);
        minor = G_TP_VERSION_MINOR(vers);

        if (major == TP_VERSION_MAJOR && minor == TP_VERSION_MINOR)
                return 0;
        else {
                CH_ERR(adapter, "found wrong TP version (%u.%u), "

                       "driver compiled for version %d.%d\n", major, minor,
                       TP_VERSION_MAJOR, TP_VERSION_MINOR);
        }
        return -EINVAL;
}

/**
 *      t3_check_tpsram - check if provided protocol SRAM
 *                        is compatible with this driver
 *      @adapter: the adapter
 *      @tp_sram: the firmware image to write
 *      @size: image size
 *
 *      Checks if an adapter's tp sram is compatible with the driver.
 *      Returns 0 if the versions are compatible, a negative error otherwise.
 */
int t3_check_tpsram(struct adapter *adapter, const u8 *tp_sram,
                    unsigned int size)
{
        u32 csum;
        unsigned int i;
        const __be32 *p = (const __be32 *)tp_sram;

        /* Verify checksum */
        for (csum = 0, i = 0; i < size / sizeof(csum); i++)
                csum += ntohl(p[i]);
        if (csum != 0xffffffff) {
                CH_ERR(adapter, "corrupted protocol SRAM image, checksum %u\n",
                       csum);
                return -EINVAL;
        }

        return 0;
}

enum fw_version_type {
        FW_VERSION_N3,
        FW_VERSION_T3
};

/**
 *      t3_get_fw_version - read the firmware version
 *      @adapter: the adapter
 *      @vers: where to place the version
 *
 *      Reads the FW version from flash.
 */
int t3_get_fw_version(struct adapter *adapter, u32 *vers)
{
        return t3_read_flash(adapter, FW_VERS_ADDR, 1, vers, 0);
}

/**
 *      t3_check_fw_version - check if the FW is compatible with this driver
 *      @adapter: the adapter
 *
 *      Checks if an adapter's FW is compatible with the driver.  Returns 0
 *      if the versions are compatible, a negative error otherwise.
 */
int t3_check_fw_version(struct adapter *adapter)
{
        int ret;
        u32 vers;
        unsigned int type, major, minor;

        ret = t3_get_fw_version(adapter, &vers);
        if (ret)
                return ret;

        type = G_FW_VERSION_TYPE(vers);
        major = G_FW_VERSION_MAJOR(vers);
        minor = G_FW_VERSION_MINOR(vers);

        if (type == FW_VERSION_T3 && major == FW_VERSION_MAJOR &&
            minor == FW_VERSION_MINOR)
                return 0;
        else if (major != FW_VERSION_MAJOR || minor < FW_VERSION_MINOR)
                CH_WARN(adapter, "found old FW minor version(%u.%u), "
                        "driver compiled for version %u.%u\n", major, minor,
                        FW_VERSION_MAJOR, FW_VERSION_MINOR);
        else {
                CH_WARN(adapter, "found newer FW version(%u.%u), "
                        "driver compiled for version %u.%u\n", major, minor,
                        FW_VERSION_MAJOR, FW_VERSION_MINOR);
                        return 0;
        }
        return -EINVAL;
}

/**
 *      t3_flash_erase_sectors - erase a range of flash sectors
 *      @adapter: the adapter
 *      @start: the first sector to erase
 *      @end: the last sector to erase
 *
 *      Erases the sectors in the given range.
 */
static int t3_flash_erase_sectors(struct adapter *adapter, int start, int end)
{
        while (start <= end) {
                int ret;

                if ((ret = sf1_write(adapter, 1, 0, SF_WR_ENABLE)) != 0 ||
                    (ret = sf1_write(adapter, 4, 0,
                                     SF_ERASE_SECTOR | (start << 8))) != 0 ||
                    (ret = flash_wait_op(adapter, 5, 500)) != 0)
                        return ret;
                start++;
        }
        return 0;
}

/**
 *      t3_load_fw - download firmware
 *      @adapter: the adapter
 *      @fw_data: the firmware image to write
 *      @size: image size
 *
 *      Write the supplied firmware image to the card's serial flash.
 *      The FW image has the following sections: @size - 8 bytes of code and
 *      data, followed by 4 bytes of FW version, followed by the 32-bit
 *      1's complement checksum of the whole image.
 */
int t3_load_fw(struct adapter *adapter, const u8 *fw_data, unsigned int size)
{
        u32 csum;
        unsigned int i;
        const __be32 *p = (const __be32 *)fw_data;
        int ret, addr, fw_sector = FW_FLASH_BOOT_ADDR >> 16;

        if ((size & 3) || size < FW_MIN_SIZE)
                return -EINVAL;
        if (size > FW_VERS_ADDR + 8 - FW_FLASH_BOOT_ADDR)
                return -EFBIG;

        for (csum = 0, i = 0; i < size / sizeof(csum); i++)
                csum += ntohl(p[i]);
        if (csum != 0xffffffff) {
                CH_ERR(adapter, "corrupted firmware image, checksum %u\n",
                       csum);
                return -EINVAL;
        }

        ret = t3_flash_erase_sectors(adapter, fw_sector, fw_sector);
        if (ret)
                goto out;

        size -= 8;              /* trim off version and checksum */
        for (addr = FW_FLASH_BOOT_ADDR; size;) {
                unsigned int chunk_size = min(size, 256U);

                ret = t3_write_flash(adapter, addr, chunk_size, fw_data);
                if (ret)
                        goto out;

                addr += chunk_size;
                fw_data += chunk_size;
                size -= chunk_size;
        }

        ret = t3_write_flash(adapter, FW_VERS_ADDR, 4, fw_data);
out:
        if (ret)
                CH_ERR(adapter, "firmware download failed, error %d\n", ret);
        return ret;
}

#define CIM_CTL_BASE 0x2000

/**
 *      t3_cim_ctl_blk_read - read a block from CIM control region
 *
 *      @adap: the adapter
 *      @addr: the start address within the CIM control region
 *      @n: number of words to read
 *      @valp: where to store the result
 *
 *      Reads a block of 4-byte words from the CIM control region.
 */
int t3_cim_ctl_blk_read(struct adapter *adap, unsigned int addr,
                        unsigned int n, unsigned int *valp)
{
        int ret = 0;

        if (t3_read_reg(adap, A_CIM_HOST_ACC_CTRL) & F_HOSTBUSY)
                return -EBUSY;

        for ( ; !ret && n--; addr += 4) {
                t3_write_reg(adap, A_CIM_HOST_ACC_CTRL, CIM_CTL_BASE + addr);
                ret = t3_wait_op_done(adap, A_CIM_HOST_ACC_CTRL, F_HOSTBUSY,
                                      0, 5, 2);
                if (!ret)
                        *valp++ = t3_read_reg(adap, A_CIM_HOST_ACC_DATA);
        }
        return ret;
}

static void t3_gate_rx_traffic(struct cmac *mac, u32 *rx_cfg,
                               u32 *rx_hash_high, u32 *rx_hash_low)
{
        /* stop Rx unicast traffic */
        t3_mac_disable_exact_filters(mac);

        /* stop broadcast, multicast, promiscuous mode traffic */
        *rx_cfg = t3_read_reg(mac->adapter, A_XGM_RX_CFG);
        t3_set_reg_field(mac->adapter, A_XGM_RX_CFG,
                         F_ENHASHMCAST | F_DISBCAST | F_COPYALLFRAMES,
                         F_DISBCAST);

        *rx_hash_high = t3_read_reg(mac->adapter, A_XGM_RX_HASH_HIGH);
        t3_write_reg(mac->adapter, A_XGM_RX_HASH_HIGH, 0);

        *rx_hash_low = t3_read_reg(mac->adapter, A_XGM_RX_HASH_LOW);
        t3_write_reg(mac->adapter, A_XGM_RX_HASH_LOW, 0);

        /* Leave time to drain max RX fifo */
        msleep(1);
}

static void t3_open_rx_traffic(struct cmac *mac, u32 rx_cfg,
                               u32 rx_hash_high, u32 rx_hash_low)
{
        t3_mac_enable_exact_filters(mac);
        t3_set_reg_field(mac->adapter, A_XGM_RX_CFG,
                         F_ENHASHMCAST | F_DISBCAST | F_COPYALLFRAMES,
                         rx_cfg);
        t3_write_reg(mac->adapter, A_XGM_RX_HASH_HIGH, rx_hash_high);
        t3_write_reg(mac->adapter, A_XGM_RX_HASH_LOW, rx_hash_low);
}

/**
 *      t3_link_changed - handle interface link changes
 *      @adapter: the adapter
 *      @port_id: the port index that changed link state
 *
 *      Called when a port's link settings change to propagate the new values
 *      to the associated PHY and MAC.  After performing the common tasks it
 *      invokes an OS-specific handler.
 */
void t3_link_changed(struct adapter *adapter, int port_id)
{
        int link_ok, speed, duplex, fc;
        struct port_info *pi = adap2pinfo(adapter, port_id);
        struct cphy *phy = &pi->phy;
        struct cmac *mac = &pi->mac;
        struct link_config *lc = &pi->link_config;

        phy->ops->get_link_status(phy, &link_ok, &speed, &duplex, &fc);

        if (!lc->link_ok && link_ok) {
                u32 rx_cfg, rx_hash_high, rx_hash_low;
                u32 status;

                t3_xgm_intr_enable(adapter, port_id);
                t3_gate_rx_traffic(mac, &rx_cfg, &rx_hash_high, &rx_hash_low);
                t3_write_reg(adapter, A_XGM_RX_CTRL + mac->offset, 0);
                t3_mac_enable(mac, MAC_DIRECTION_RX);

                status = t3_read_reg(adapter, A_XGM_INT_STATUS + mac->offset);
                if (status & F_LINKFAULTCHANGE) {
                        mac->stats.link_faults++;
                        pi->link_fault = 1;
                }
                t3_open_rx_traffic(mac, rx_cfg, rx_hash_high, rx_hash_low);
        }

        if (lc->requested_fc & PAUSE_AUTONEG)
                fc &= lc->requested_fc;
        else
                fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);

        if (link_ok == lc->link_ok && speed == lc->speed &&
            duplex == lc->duplex && fc == lc->fc)
                return;                            /* nothing changed */

        if (link_ok != lc->link_ok && adapter->params.rev > 0 &&
            uses_xaui(adapter)) {
                if (link_ok)
                        t3b_pcs_reset(mac);
                t3_write_reg(adapter, A_XGM_XAUI_ACT_CTRL + mac->offset,
                             link_ok ? F_TXACTENABLE | F_RXEN : 0);
        }
        lc->link_ok = link_ok;
        lc->speed = speed < 0 ? SPEED_INVALID : speed;
        lc->duplex = duplex < 0 ? DUPLEX_INVALID : duplex;

        if (link_ok && speed >= 0 && lc->autoneg == AUTONEG_ENABLE) {
                /* Set MAC speed, duplex, and flow control to match PHY. */
                t3_mac_set_speed_duplex_fc(mac, speed, duplex, fc);
                lc->fc = fc;
        }

        t3_os_link_changed(adapter, port_id, link_ok && !pi->link_fault,
                           speed, duplex, fc);
}

void t3_link_fault(struct adapter *adapter, int port_id)
{
        struct port_info *pi = adap2pinfo(adapter, port_id);
        struct cmac *mac = &pi->mac;
        struct cphy *phy = &pi->phy;
        struct link_config *lc = &pi->link_config;
        int link_ok, speed, duplex, fc, link_fault;
        u32 rx_cfg, rx_hash_high, rx_hash_low;

        t3_gate_rx_traffic(mac, &rx_cfg, &rx_hash_high, &rx_hash_low);

        if (adapter->params.rev > 0 && uses_xaui(adapter))
                t3_write_reg(adapter, A_XGM_XAUI_ACT_CTRL + mac->offset, 0);

        t3_write_reg(adapter, A_XGM_RX_CTRL + mac->offset, 0);
        t3_mac_enable(mac, MAC_DIRECTION_RX);

        t3_open_rx_traffic(mac, rx_cfg, rx_hash_high, rx_hash_low);

        link_fault = t3_read_reg(adapter,
                                 A_XGM_INT_STATUS + mac->offset);
        link_fault &= F_LINKFAULTCHANGE;

        link_ok = lc->link_ok;
        speed = lc->speed;
        duplex = lc->duplex;
        fc = lc->fc;

        phy->ops->get_link_status(phy, &link_ok, &speed, &duplex, &fc);

        if (link_fault) {
                lc->link_ok = 0;
                lc->speed = SPEED_INVALID;
                lc->duplex = DUPLEX_INVALID;

                t3_os_link_fault(adapter, port_id, 0);

                /* Account link faults only when the phy reports a link up */
                if (link_ok)
                        mac->stats.link_faults++;
        } else {
                if (link_ok)
                        t3_write_reg(adapter, A_XGM_XAUI_ACT_CTRL + mac->offset,
                                     F_TXACTENABLE | F_RXEN);

                pi->link_fault = 0;
                lc->link_ok = (unsigned char)link_ok;
                lc->speed = speed < 0 ? SPEED_INVALID : speed;
                lc->duplex = duplex < 0 ? DUPLEX_INVALID : duplex;
                t3_os_link_fault(adapter, port_id, link_ok);
        }
}

/**
 *      t3_link_start - apply link configuration to MAC/PHY
 *      @phy: the PHY to setup
 *      @mac: the MAC to setup
 *      @lc: the requested link configuration
 *
 *      Set up a port's MAC and PHY according to a desired link configuration.
 *      - If the PHY can auto-negotiate first decide what to advertise, then
 *        enable/disable auto-negotiation as desired, and reset.
 *      - If the PHY does not auto-negotiate just reset it.
 *      - If auto-negotiation is off set the MAC to the proper speed/duplex/FC,
 *        otherwise do it later based on the outcome of auto-negotiation.
 */
int t3_link_start(struct cphy *phy, struct cmac *mac, struct link_config *lc)
{
        unsigned int fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);

        lc->link_ok = 0;
        if (lc->supported & SUPPORTED_Autoneg) {
                lc->advertising &= ~(ADVERTISED_Asym_Pause | ADVERTISED_Pause);
                if (fc) {
                        lc->advertising |= ADVERTISED_Asym_Pause;
                        if (fc & PAUSE_RX)
                                lc->advertising |= ADVERTISED_Pause;
                }
                phy->ops->advertise(phy, lc->advertising);

                if (lc->autoneg == AUTONEG_DISABLE) {
                        lc->speed = lc->requested_speed;
                        lc->duplex = lc->requested_duplex;
                        lc->fc = (unsigned char)fc;
                        t3_mac_set_speed_duplex_fc(mac, lc->speed, lc->duplex,
                                                   fc);
                        /* Also disables autoneg */
                        phy->ops->set_speed_duplex(phy, lc->speed, lc->duplex);
                } else
                        phy->ops->autoneg_enable(phy);
        } else {
                t3_mac_set_speed_duplex_fc(mac, -1, -1, fc);
                lc->fc = (unsigned char)fc;
                phy->ops->reset(phy, 0);
        }
        return 0;
}

/**
 *      t3_set_vlan_accel - control HW VLAN extraction
 *      @adapter: the adapter
 *      @ports: bitmap of adapter ports to operate on
 *      @on: enable (1) or disable (0) HW VLAN extraction
 *
 *      Enables or disables HW extraction of VLAN tags for the given port.
 */
void t3_set_vlan_accel(struct adapter *adapter, unsigned int ports, int on)
{
        t3_set_reg_field(adapter, A_TP_OUT_CONFIG,
                         ports << S_VLANEXTRACTIONENABLE,
                         on ? (ports << S_VLANEXTRACTIONENABLE) : 0);
}

struct intr_info {
        unsigned int mask;      /* bits to check in interrupt status */
        const char *msg;        /* message to print or NULL */
        short stat_idx;         /* stat counter to increment or -1 */
        unsigned short fatal;   /* whether the condition reported is fatal */
};

/**
 *      t3_handle_intr_status - table driven interrupt handler
 *      @adapter: the adapter that generated the interrupt
 *      @reg: the interrupt status register to process
 *      @mask: a mask to apply to the interrupt status
 *      @acts: table of interrupt actions
 *      @stats: statistics counters tracking interrupt occurrences
 *
 *      A table driven interrupt handler that applies a set of masks to an
 *      interrupt status word and performs the corresponding actions if the
 *      interrupts described by the mask have occurred.  The actions include
 *      optionally printing a warning or alert message, and optionally
 *      incrementing a stat counter.  The table is terminated by an entry
 *      specifying mask 0.  Returns the number of fatal interrupt conditions.
 */
static int t3_handle_intr_status(struct adapter *adapter, unsigned int reg,
                                 unsigned int mask,
                                 const struct intr_info *acts,
                                 unsigned long *stats)
{
        int fatal = 0;
        unsigned int status = t3_read_reg(adapter, reg) & mask;

        for (; acts->mask; ++acts) {
                if (!(status & acts->mask))
                        continue;
                if (acts->fatal) {
                        fatal++;
                        CH_ALERT(adapter, "%s (0x%x)\n",
                                 acts->msg, status & acts->mask);
                        status &= ~acts->mask;
                } else if (acts->msg)
                        CH_WARN(adapter, "%s (0x%x)\n",
                                acts->msg, status & acts->mask);
                if (acts->stat_idx >= 0)
                        stats[acts->stat_idx]++;
        }
        if (status)             /* clear processed interrupts */
                t3_write_reg(adapter, reg, status);
        return fatal;
}

#define SGE_INTR_MASK (F_RSPQDISABLED | \
                       F_UC_REQ_FRAMINGERROR | F_R_REQ_FRAMINGERROR | \
                       F_CPPARITYERROR | F_OCPARITYERROR | F_RCPARITYERROR | \
                       F_IRPARITYERROR | V_ITPARITYERROR(M_ITPARITYERROR) | \
                       V_FLPARITYERROR(M_FLPARITYERROR) | F_LODRBPARITYERROR | \
                       F_HIDRBPARITYERROR | F_LORCQPARITYERROR | \
                       F_HIRCQPARITYERROR | F_LOPRIORITYDBFULL | \
                       F_HIPRIORITYDBFULL | F_LOPRIORITYDBEMPTY | \
                       F_HIPRIORITYDBEMPTY | F_HIPIODRBDROPERR | \
                       F_LOPIODRBDROPERR)
#define MC5_INTR_MASK (F_PARITYERR | F_ACTRGNFULL | F_UNKNOWNCMD | \
                       F_REQQPARERR | F_DISPQPARERR | F_DELACTEMPTY | \
                       F_NFASRCHFAIL)
#define MC7_INTR_MASK (F_AE | F_UE | F_CE | V_PE(M_PE))
#define XGM_INTR_MASK (V_TXFIFO_PRTY_ERR(M_TXFIFO_PRTY_ERR) | \
                       V_RXFIFO_PRTY_ERR(M_RXFIFO_PRTY_ERR) | \
                       F_TXFIFO_UNDERRUN)
#define PCIX_INTR_MASK (F_MSTDETPARERR | F_SIGTARABT | F_RCVTARABT | \
                        F_RCVMSTABT | F_SIGSYSERR | F_DETPARERR | \
                        F_SPLCMPDIS | F_UNXSPLCMP | F_RCVSPLCMPERR | \
                        F_DETCORECCERR | F_DETUNCECCERR | F_PIOPARERR | \
                        V_WFPARERR(M_WFPARERR) | V_RFPARERR(M_RFPARERR) | \
                        V_CFPARERR(M_CFPARERR) /* | V_MSIXPARERR(M_MSIXPARERR) */)
#define PCIE_INTR_MASK (F_UNXSPLCPLERRR | F_UNXSPLCPLERRC | F_PCIE_PIOPARERR |\
                        F_PCIE_WFPARERR | F_PCIE_RFPARERR | F_PCIE_CFPARERR | \
                        /* V_PCIE_MSIXPARERR(M_PCIE_MSIXPARERR) | */ \
                        F_RETRYBUFPARERR | F_RETRYLUTPARERR | F_RXPARERR | \
                        F_TXPARERR | V_BISTERR(M_BISTERR))
#define ULPRX_INTR_MASK (F_PARERRDATA | F_PARERRPCMD | F_ARBPF1PERR | \
                         F_ARBPF0PERR | F_ARBFPERR | F_PCMDMUXPERR | \
                         F_DATASELFRAMEERR1 | F_DATASELFRAMEERR0)
#define ULPTX_INTR_MASK 0xfc
#define CPLSW_INTR_MASK (F_CIM_OP_MAP_PERR | F_TP_FRAMING_ERROR | \
                         F_SGE_FRAMING_ERROR | F_CIM_FRAMING_ERROR | \
                         F_ZERO_SWITCH_ERROR)
#define CIM_INTR_MASK (F_BLKWRPLINT | F_BLKRDPLINT | F_BLKWRCTLINT | \
                       F_BLKRDCTLINT | F_BLKWRFLASHINT | F_BLKRDFLASHINT | \
                       F_SGLWRFLASHINT | F_WRBLKFLASHINT | F_BLKWRBOOTINT | \
                       F_FLASHRANGEINT | F_SDRAMRANGEINT | F_RSVDSPACEINT | \
                       F_DRAMPARERR | F_ICACHEPARERR | F_DCACHEPARERR | \
                       F_OBQSGEPARERR | F_OBQULPHIPARERR | F_OBQULPLOPARERR | \
                       F_IBQSGELOPARERR | F_IBQSGEHIPARERR | F_IBQULPPARERR | \
                       F_IBQTPPARERR | F_ITAGPARERR | F_DTAGPARERR)
#define PMTX_INTR_MASK (F_ZERO_C_CMD_ERROR | ICSPI_FRM_ERR | OESPI_FRM_ERR | \
                        V_ICSPI_PAR_ERROR(M_ICSPI_PAR_ERROR) | \
                        V_OESPI_PAR_ERROR(M_OESPI_PAR_ERROR))
#define PMRX_INTR_MASK (F_ZERO_E_CMD_ERROR | IESPI_FRM_ERR | OCSPI_FRM_ERR | \
                        V_IESPI_PAR_ERROR(M_IESPI_PAR_ERROR) | \
                        V_OCSPI_PAR_ERROR(M_OCSPI_PAR_ERROR))
#define MPS_INTR_MASK (V_TX0TPPARERRENB(M_TX0TPPARERRENB) | \
                       V_TX1TPPARERRENB(M_TX1TPPARERRENB) | \
                       V_RXTPPARERRENB(M_RXTPPARERRENB) | \
                       V_MCAPARERRENB(M_MCAPARERRENB))
#define XGM_EXTRA_INTR_MASK (F_LINKFAULTCHANGE)
#define PL_INTR_MASK (F_T3DBG | F_XGMAC0_0 | F_XGMAC0_1 | F_MC5A | F_PM1_TX | \
                      F_PM1_RX | F_ULP2_TX | F_ULP2_RX | F_TP1 | F_CIM | \
                      F_MC7_CM | F_MC7_PMTX | F_MC7_PMRX | F_SGE3 | F_PCIM0 | \
                      F_MPS0 | F_CPL_SWITCH)
/*
 * Interrupt handler for the PCIX1 module.
 */
static void pci_intr_handler(struct adapter *adapter)
{
        static const struct intr_info pcix1_intr_info[] = {
                {F_MSTDETPARERR, "PCI master detected parity error", -1, 1},
                {F_SIGTARABT, "PCI signaled target abort", -1, 1},
                {F_RCVTARABT, "PCI received target abort", -1, 1},
                {F_RCVMSTABT, "PCI received master abort", -1, 1},
                {F_SIGSYSERR, "PCI signaled system error", -1, 1},
                {F_DETPARERR, "PCI detected parity error", -1, 1},
                {F_SPLCMPDIS, "PCI split completion discarded", -1, 1},
                {F_UNXSPLCMP, "PCI unexpected split completion error", -1, 1},
                {F_RCVSPLCMPERR, "PCI received split completion error", -1,
                 1},
                {F_DETCORECCERR, "PCI correctable ECC error",
                 STAT_PCI_CORR_ECC, 0},
                {F_DETUNCECCERR, "PCI uncorrectable ECC error", -1, 1},
                {F_PIOPARERR, "PCI PIO FIFO parity error", -1, 1},
                {V_WFPARERR(M_WFPARERR), "PCI write FIFO parity error", -1,
                 1},
                {V_RFPARERR(M_RFPARERR), "PCI read FIFO parity error", -1,
                 1},
                {V_CFPARERR(M_CFPARERR), "PCI command FIFO parity error", -1,
                 1},
                {V_MSIXPARERR(M_MSIXPARERR), "PCI MSI-X table/PBA parity "
                 "error", -1, 1},
                {0}
        };

        if (t3_handle_intr_status(adapter, A_PCIX_INT_CAUSE, PCIX_INTR_MASK,
                                  pcix1_intr_info, adapter->irq_stats))
                t3_fatal_err(adapter);
}

/*
 * Interrupt handler for the PCIE module.
 */
static void pcie_intr_handler(struct adapter *adapter)
{
        static const struct intr_info pcie_intr_info[] = {
                {F_PEXERR, "PCI PEX error", -1, 1},
                {F_UNXSPLCPLERRR,
                 "PCI unexpected split completion DMA read error", -1, 1},
                {F_UNXSPLCPLERRC,
                 "PCI unexpected split completion DMA command error", -1, 1},
                {F_PCIE_PIOPARERR, "PCI PIO FIFO parity error", -1, 1},
                {F_PCIE_WFPARERR, "PCI write FIFO parity error", -1, 1},
                {F_PCIE_RFPARERR, "PCI read FIFO parity error", -1, 1},
                {F_PCIE_CFPARERR, "PCI command FIFO parity error", -1, 1},
                {V_PCIE_MSIXPARERR(M_PCIE_MSIXPARERR),
                 "PCI MSI-X table/PBA parity error", -1, 1},
                {F_RETRYBUFPARERR, "PCI retry buffer parity error", -1, 1},
                {F_RETRYLUTPARERR, "PCI retry LUT parity error", -1, 1},
                {F_RXPARERR, "PCI Rx parity error", -1, 1},
                {F_TXPARERR, "PCI Tx parity error", -1, 1},
                {V_BISTERR(M_BISTERR), "PCI BIST error", -1, 1},
                {0}
        };

        if (t3_read_reg(adapter, A_PCIE_INT_CAUSE) & F_PEXERR)
                CH_ALERT(adapter, "PEX error code 0x%x\n",
                         t3_read_reg(adapter, A_PCIE_PEX_ERR));

        if (t3_handle_intr_status(adapter, A_PCIE_INT_CAUSE, PCIE_INTR_MASK,
                                  pcie_intr_info, adapter->irq_stats))
                t3_fatal_err(adapter);
}

/*
 * TP interrupt handler.
 */
static void tp_intr_handler(struct adapter *adapter)
{
        static const struct intr_info tp_intr_info[] = {
                {0xffffff, "TP parity error", -1, 1},
                {0x1000000, "TP out of Rx pages", -1, 1},
                {0x2000000, "TP out of Tx pages", -1, 1},
                {0}
        };

        static const struct intr_info tp_intr_info_t3c[] = {
                {0x1fffffff, "TP parity error", -1, 1},
                {F_FLMRXFLSTEMPTY, "TP out of Rx pages", -1, 1},
                {F_FLMTXFLSTEMPTY, "TP out of Tx pages", -1, 1},
                {0}
        };

        if (t3_handle_intr_status(adapter, A_TP_INT_CAUSE, 0xffffffff,
                                  adapter->params.rev < T3_REV_C ?
                                  tp_intr_info : tp_intr_info_t3c, NULL))
                t3_fatal_err(adapter);
}

/*
 * CIM interrupt handler.
 */
static void cim_intr_handler(struct adapter *adapter)
{
        static const struct intr_info cim_intr_info[] = {
                {F_RSVDSPACEINT, "CIM reserved space write", -1, 1},
                {F_SDRAMRANGEINT, "CIM SDRAM address out of range", -1, 1},
                {F_FLASHRANGEINT, "CIM flash address out of range", -1, 1},
                {F_BLKWRBOOTINT, "CIM block write to boot space", -1, 1},
                {F_WRBLKFLASHINT, "CIM write to cached flash space", -1, 1},
                {F_SGLWRFLASHINT, "CIM single write to flash space", -1, 1},
                {F_BLKRDFLASHINT, "CIM block read from flash space", -1, 1},
                {F_BLKWRFLASHINT, "CIM block write to flash space", -1, 1},
                {F_BLKRDCTLINT, "CIM block read from CTL space", -1, 1},
                {F_BLKWRCTLINT, "CIM block write to CTL space", -1, 1},
                {F_BLKRDPLINT, "CIM block read from PL space", -1, 1},
                {F_BLKWRPLINT, "CIM block write to PL space", -1, 1},
                {F_DRAMPARERR, "CIM DRAM parity error", -1, 1},
                {F_ICACHEPARERR, "CIM icache parity error", -1, 1},
                {F_DCACHEPARERR, "CIM dcache parity error", -1, 1},
                {F_OBQSGEPARERR, "CIM OBQ SGE parity error", -1, 1},
                {F_OBQULPHIPARERR, "CIM OBQ ULPHI parity error", -1, 1},
                {F_OBQULPLOPARERR, "CIM OBQ ULPLO parity error", -1, 1},
                {F_IBQSGELOPARERR, "CIM IBQ SGELO parity error", -1, 1},
                {F_IBQSGEHIPARERR, "CIM IBQ SGEHI parity error", -1, 1},
                {F_IBQULPPARERR, "CIM IBQ ULP parity error", -1, 1},
                {F_IBQTPPARERR, "CIM IBQ TP parity error", -1, 1},
                {F_ITAGPARERR, "CIM itag parity error", -1, 1},
                {F_DTAGPARERR, "CIM dtag parity error", -1, 1},
                {0}
        };

        if (t3_handle_intr_status(adapter, A_CIM_HOST_INT_CAUSE, 0xffffffff,
                                  cim_intr_info, NULL))
                t3_fatal_err(adapter);
}

/*
 * ULP RX interrupt handler.
 */
static void ulprx_intr_handler(struct adapter *adapter)
{
        static const struct intr_info ulprx_intr_info[] = {
                {F_PARERRDATA, "ULP RX data parity error", -1, 1},
                {F_PARERRPCMD, "ULP RX command parity error", -1, 1},
                {F_ARBPF1PERR, "ULP RX ArbPF1 parity error", -1, 1},
                {F_ARBPF0PERR, "ULP RX ArbPF0 parity error", -1, 1},
                {F_ARBFPERR, "ULP RX ArbF parity error", -1, 1},
                {F_PCMDMUXPERR, "ULP RX PCMDMUX parity error", -1, 1},
                {F_DATASELFRAMEERR1, "ULP RX frame error", -1, 1},
                {F_DATASELFRAMEERR0, "ULP RX frame error", -1, 1},
                {0}
        };

        if (t3_handle_intr_status(adapter, A_ULPRX_INT_CAUSE, 0xffffffff,
                                  ulprx_intr_info, NULL))
                t3_fatal_err(adapter);
}

/*
 * ULP TX interrupt handler.
 */
static void ulptx_intr_handler(struct adapter *adapter)
{
        static const struct intr_info ulptx_intr_info[] = {
                {F_PBL_BOUND_ERR_CH0, "ULP TX channel 0 PBL out of bounds",
                 STAT_ULP_CH0_PBL_OOB, 0},
                {F_PBL_BOUND_ERR_CH1, "ULP TX channel 1 PBL out of bounds",
                 STAT_ULP_CH1_PBL_OOB, 0},
                {0xfc, "ULP TX parity error", -1, 1},
                {0}
        };

        if (t3_handle_intr_status(adapter, A_ULPTX_INT_CAUSE, 0xffffffff,
                                  ulptx_intr_info, adapter->irq_stats))
                t3_fatal_err(adapter);
}

#define ICSPI_FRM_ERR (F_ICSPI0_FIFO2X_RX_FRAMING_ERROR | \
        F_ICSPI1_FIFO2X_RX_FRAMING_ERROR | F_ICSPI0_RX_FRAMING_ERROR | \
        F_ICSPI1_RX_FRAMING_ERROR | F_ICSPI0_TX_FRAMING_ERROR | \
        F_ICSPI1_TX_FRAMING_ERROR)
#define OESPI_FRM_ERR (F_OESPI0_RX_FRAMING_ERROR | \
        F_OESPI1_RX_FRAMING_ERROR | F_OESPI0_TX_FRAMING_ERROR | \
        F_OESPI1_TX_FRAMING_ERROR | F_OESPI0_OFIFO2X_TX_FRAMING_ERROR | \
        F_OESPI1_OFIFO2X_TX_FRAMING_ERROR)

/*
 * PM TX interrupt handler.
 */
static void pmtx_intr_handler(struct adapter *adapter)
{
        static const struct intr_info pmtx_intr_info[] = {
                {F_ZERO_C_CMD_ERROR, "PMTX 0-length pcmd", -1, 1},
                {ICSPI_FRM_ERR, "PMTX ispi framing error", -1, 1},
                {OESPI_FRM_ERR, "PMTX ospi framing error", -1, 1},
                {V_ICSPI_PAR_ERROR(M_ICSPI_PAR_ERROR),
                 "PMTX ispi parity error", -1, 1},
                {V_OESPI_PAR_ERROR(M_OESPI_PAR_ERROR),
                 "PMTX ospi parity error", -1, 1},
                {0}
        };

        if (t3_handle_intr_status(adapter, A_PM1_TX_INT_CAUSE, 0xffffffff,
                                  pmtx_intr_info, NULL))
                t3_fatal_err(adapter);
}

#define IESPI_FRM_ERR (F_IESPI0_FIFO2X_RX_FRAMING_ERROR | \
        F_IESPI1_FIFO2X_RX_FRAMING_ERROR | F_IESPI0_RX_FRAMING_ERROR | \
        F_IESPI1_RX_FRAMING_ERROR | F_IESPI0_TX_FRAMING_ERROR | \
        F_IESPI1_TX_FRAMING_ERROR)
#define OCSPI_FRM_ERR (F_OCSPI0_RX_FRAMING_ERROR | \
        F_OCSPI1_RX_FRAMING_ERROR | F_OCSPI0_TX_FRAMING_ERROR | \
        F_OCSPI1_TX_FRAMING_ERROR | F_OCSPI0_OFIFO2X_TX_FRAMING_ERROR | \
        F_OCSPI1_OFIFO2X_TX_FRAMING_ERROR)

/*
 * PM RX interrupt handler.
 */
static void pmrx_intr_handler(struct adapter *adapter)
{
        static const struct intr_info pmrx_intr_info[] = {
                {F_ZERO_E_CMD_ERROR, "PMRX 0-length pcmd", -1, 1},
                {IESPI_FRM_ERR, "PMRX ispi framing error", -1, 1},
                {OCSPI_FRM_ERR, "PMRX ospi framing error", -1, 1},
                {V_IESPI_PAR_ERROR(M_IESPI_PAR_ERROR),
                 "PMRX ispi parity error", -1, 1},
                {V_OCSPI_PAR_ERROR(M_OCSPI_PAR_ERROR),
                 "PMRX ospi parity error", -1, 1},
                {0}
        };

        if (t3_handle_intr_status(adapter, A_PM1_RX_INT_CAUSE, 0xffffffff,
                                  pmrx_intr_info, NULL))
                t3_fatal_err(adapter);
}

/*
 * CPL switch interrupt handler.
 */
static void cplsw_intr_handler(struct adapter *adapter)
{
        static const struct intr_info cplsw_intr_info[] = {
                {F_CIM_OP_MAP_PERR, "CPL switch CIM parity error", -1, 1},
                {F_CIM_OVFL_ERROR, "CPL switch CIM overflow", -1, 1},
                {F_TP_FRAMING_ERROR, "CPL switch TP framing error", -1, 1},
                {F_SGE_FRAMING_ERROR, "CPL switch SGE framing error", -1, 1},
                {F_CIM_FRAMING_ERROR, "CPL switch CIM framing error", -1, 1},
                {F_ZERO_SWITCH_ERROR, "CPL switch no-switch error", -1, 1},
                {0}
        };

        if (t3_handle_intr_status(adapter, A_CPL_INTR_CAUSE, 0xffffffff,
                                  cplsw_intr_info, NULL))
                t3_fatal_err(adapter);
}

/*
 * MPS interrupt handler.
 */
static void mps_intr_handler(struct adapter *adapter)
{
        static const struct intr_info mps_intr_info[] = {
                {0x1ff, "MPS parity error", -1, 1},
                {0}
        };

        if (t3_handle_intr_status(adapter, A_MPS_INT_CAUSE, 0xffffffff,
                                  mps_intr_info, NULL))
                t3_fatal_err(adapter);
}

#define MC7_INTR_FATAL (F_UE | V_PE(M_PE) | F_AE)

/*
 * MC7 interrupt handler.
 */
static void mc7_intr_handler(struct mc7 *mc7)
{
        struct adapter *adapter = mc7->adapter;
        u32 cause = t3_read_reg(adapter, mc7->offset + A_MC7_INT_CAUSE);

        if (cause & F_CE) {
                mc7->stats.corr_err++;
                CH_WARN(adapter, "%s MC7 correctable error at addr 0x%x, "
                        "data 0x%x 0x%x 0x%x\n", mc7->name,
                        t3_read_reg(adapter, mc7->offset + A_MC7_CE_ADDR),
                        t3_read_reg(adapter, mc7->offset + A_MC7_CE_DATA0),
                        t3_read_reg(adapter, mc7->offset + A_MC7_CE_DATA1),
                        t3_read_reg(adapter, mc7->offset + A_MC7_CE_DATA2));
        }

        if (cause & F_UE) {
                mc7->stats.uncorr_err++;
                CH_ALERT(adapter, "%s MC7 uncorrectable error at addr 0x%x, "
                         "data 0x%x 0x%x 0x%x\n", mc7->name,
                         t3_read_reg(adapter, mc7->offset + A_MC7_UE_ADDR),
                         t3_read_reg(adapter, mc7->offset + A_MC7_UE_DATA0),
                         t3_read_reg(adapter, mc7->offset + A_MC7_UE_DATA1),
                         t3_read_reg(adapter, mc7->offset + A_MC7_UE_DATA2));
        }

        if (G_PE(cause)) {
                mc7->stats.parity_err++;
                CH_ALERT(adapter, "%s MC7 parity error 0x%x\n",
                         mc7->name, G_PE(cause));
        }

        if (cause & F_AE) {
                u32 addr = 0;

                if (adapter->params.rev > 0)
                        addr = t3_read_reg(adapter,
                                           mc7->offset + A_MC7_ERR_ADDR);
                mc7->stats.addr_err++;
                CH_ALERT(adapter, "%s MC7 address error: 0x%x\n",
                         mc7->name, addr);
        }

        if (cause & MC7_INTR_FATAL)
                t3_fatal_err(adapter);

        t3_write_reg(adapter, mc7->offset + A_MC7_INT_CAUSE, cause);
}

#define XGM_INTR_FATAL (V_TXFIFO_PRTY_ERR(M_TXFIFO_PRTY_ERR) | \
                        V_RXFIFO_PRTY_ERR(M_RXFIFO_PRTY_ERR))
/*
 * XGMAC interrupt handler.
 */
static int mac_intr_handler(struct adapter *adap, unsigned int idx)
{
        struct cmac *mac = &adap2pinfo(adap, idx)->mac;
        /*
         * We mask out interrupt causes for which we're not taking interrupts.
         * This allows us to use polling logic to monitor some of the other
         * conditions when taking interrupts would impose too much load on the
         * system.
         */
        u32 cause = t3_read_reg(adap, A_XGM_INT_CAUSE + mac->offset) &
                    ~F_RXFIFO_OVERFLOW;

        if (cause & V_TXFIFO_PRTY_ERR(M_TXFIFO_PRTY_ERR)) {
                mac->stats.tx_fifo_parity_err++;
                CH_ALERT(adap, "port%d: MAC TX FIFO parity error\n", idx);
        }
        if (cause & V_RXFIFO_PRTY_ERR(M_RXFIFO_PRTY_ERR)) {
                mac->stats.rx_fifo_parity_err++;
                CH_ALERT(adap, "port%d: MAC RX FIFO parity error\n", idx);
        }
        if (cause & F_TXFIFO_UNDERRUN)
                mac->stats.tx_fifo_urun++;
        if (cause & F_RXFIFO_OVERFLOW)
                mac->stats.rx_fifo_ovfl++;
        if (cause & V_SERDES_LOS(M_SERDES_LOS))
                mac->stats.serdes_signal_loss++;
        if (cause & F_XAUIPCSCTCERR)
                mac->stats.xaui_pcs_ctc_err++;
        if (cause & F_XAUIPCSALIGNCHANGE)
                mac->stats.xaui_pcs_align_change++;
        if (cause & F_XGM_INT) {
                t3_set_reg_field(adap,
                                 A_XGM_INT_ENABLE + mac->offset,
                                 F_XGM_INT, 0);
                mac->stats.link_faults++;

                t3_os_link_fault_handler(adap, idx);
        }

        if (cause & XGM_INTR_FATAL)
                t3_fatal_err(adap);

        t3_write_reg(adap, A_XGM_INT_CAUSE + mac->offset, cause);
        return cause != 0;
}

/*
 * Interrupt handler for PHY events.
 */
int t3_phy_intr_handler(struct adapter *adapter)
{
        u32 i, cause = t3_read_reg(adapter, A_T3DBG_INT_CAUSE);

        for_each_port(adapter, i) {
                struct port_info *p = adap2pinfo(adapter, i);

                if (!(p->phy.caps & SUPPORTED_IRQ))
                        continue;

                if (cause & (1 << adapter_info(adapter)->gpio_intr[i])) {
                        int phy_cause = p->phy.ops->intr_handler(&p->phy);

                        if (phy_cause & cphy_cause_link_change)
                                t3_link_changed(adapter, i);
                        if (phy_cause & cphy_cause_fifo_error)
                                p->phy.fifo_errors++;
                        if (phy_cause & cphy_cause_module_change)
                                t3_os_phymod_changed(adapter, i);
                }
        }

        t3_write_reg(adapter, A_T3DBG_INT_CAUSE, cause);
        return 0;
}

/*
 * T3 slow path (non-data) interrupt handler.
 */
int t3_slow_intr_handler(struct adapter *adapter)
{
        u32 cause = t3_read_reg(adapter, A_PL_INT_CAUSE0);

        cause &= adapter->slow_intr_mask;
        if (!cause)
                return 0;
        if (cause & F_PCIM0) {
                if (is_pcie(adapter))
                        pcie_intr_handler(adapter);
                else
                        pci_intr_handler(adapter);
        }
        if (cause & F_SGE3)
                t3_sge_err_intr_handler(adapter);
        if (cause & F_MC7_PMRX)
                mc7_intr_handler(&adapter->pmrx);
        if (cause & F_MC7_PMTX)
                mc7_intr_handler(&adapter->pmtx);
        if (cause & F_MC7_CM)
                mc7_intr_handler(&adapter->cm);
        if (cause & F_CIM)
                cim_intr_handler(adapter);
        if (cause & F_TP1)
                tp_intr_handler(adapter);
        if (cause & F_ULP2_RX)
                ulprx_intr_handler(adapter);
        if (cause & F_ULP2_TX)
                ulptx_intr_handler(adapter);
        if (cause & F_PM1_RX)
                pmrx_intr_handler(adapter);
        if (cause & F_PM1_TX)
                pmtx_intr_handler(adapter);
        if (cause & F_CPL_SWITCH)
                cplsw_intr_handler(adapter);
        if (cause & F_MPS0)
                mps_intr_handler(adapter);
        if (cause & F_MC5A)
                t3_mc5_intr_handler(&adapter->mc5);
        if (cause & F_XGMAC0_0)
                mac_intr_handler(adapter, 0);
        if (cause & F_XGMAC0_1)
                mac_intr_handler(adapter, 1);
        if (cause & F_T3DBG)
                t3_os_ext_intr_handler(adapter);

        /* Clear the interrupts just processed. */
        t3_write_reg(adapter, A_PL_INT_CAUSE0, cause);
        t3_read_reg(adapter, A_PL_INT_CAUSE0);  /* flush */
        return 1;
}

static unsigned int calc_gpio_intr(struct adapter *adap)
{
        unsigned int i, gpi_intr = 0;

        for_each_port(adap, i)
                if ((adap2pinfo(adap, i)->phy.caps & SUPPORTED_IRQ) &&
                    adapter_info(adap)->gpio_intr[i])
                        gpi_intr |= 1 << adapter_info(adap)->gpio_intr[i];
        return gpi_intr;
}

/**
 *      t3_intr_enable - enable interrupts
 *      @adapter: the adapter whose interrupts should be enabled
 *
 *      Enable interrupts by setting the interrupt enable registers of the
 *      various HW modules and then enabling the top-level interrupt
 *      concentrator.
 */
void t3_intr_enable(struct adapter *adapter)
{
        static const struct addr_val_pair intr_en_avp[] = {
                {A_SG_INT_ENABLE, SGE_INTR_MASK},
                {A_MC7_INT_ENABLE, MC7_INTR_MASK},
                {A_MC7_INT_ENABLE - MC7_PMRX_BASE_ADDR + MC7_PMTX_BASE_ADDR,
                 MC7_INTR_MASK},
                {A_MC7_INT_ENABLE - MC7_PMRX_BASE_ADDR + MC7_CM_BASE_ADDR,

                 MC7_INTR_MASK},
                {A_MC5_DB_INT_ENABLE, MC5_INTR_MASK},
                {A_ULPRX_INT_ENABLE, ULPRX_INTR_MASK},
                {A_PM1_TX_INT_ENABLE, PMTX_INTR_MASK},
                {A_PM1_RX_INT_ENABLE, PMRX_INTR_MASK},
                {A_CIM_HOST_INT_ENABLE, CIM_INTR_MASK},
                {A_MPS_INT_ENABLE, MPS_INTR_MASK},
        };

        adapter->slow_intr_mask = PL_INTR_MASK;

        t3_write_regs(adapter, intr_en_avp, ARRAY_SIZE(intr_en_avp), 0);
        t3_write_reg(adapter, A_TP_INT_ENABLE,
                     adapter->params.rev >= T3_REV_C ? 0x2bfffff : 0x3bfffff);

        if (adapter->params.rev > 0) {
                t3_write_reg(adapter, A_CPL_INTR_ENABLE,
                             CPLSW_INTR_MASK | F_CIM_OVFL_ERROR);
                t3_write_reg(adapter, A_ULPTX_INT_ENABLE,
                             ULPTX_INTR_MASK | F_PBL_BOUND_ERR_CH0 |
                             F_PBL_BOUND_ERR_CH1);
        } else {
                t3_write_reg(adapter, A_CPL_INTR_ENABLE, CPLSW_INTR_MASK);
                t3_write_reg(adapter, A_ULPTX_INT_ENABLE, ULPTX_INTR_MASK);
        }

        t3_write_reg(adapter, A_T3DBG_INT_ENABLE, calc_gpio_intr(adapter));

        if (is_pcie(adapter))
                t3_write_reg(adapter, A_PCIE_INT_ENABLE, PCIE_INTR_MASK);
        else
                t3_write_reg(adapter, A_PCIX_INT_ENABLE, PCIX_INTR_MASK);
        t3_write_reg(adapter, A_PL_INT_ENABLE0, adapter->slow_intr_mask);
        t3_read_reg(adapter, A_PL_INT_ENABLE0); /* flush */
}

/**
 *      t3_intr_disable - disable a card's interrupts
 *      @adapter: the adapter whose interrupts should be disabled
 *
 *      Disable interrupts.  We only disable the top-level interrupt
 *      concentrator and the SGE data interrupts.
 */
void t3_intr_disable(struct adapter *adapter)
{
        t3_write_reg(adapter, A_PL_INT_ENABLE0, 0);
        t3_read_reg(adapter, A_PL_INT_ENABLE0); /* flush */
        adapter->slow_intr_mask = 0;
}

/**
 *      t3_intr_clear - clear all interrupts
 *      @adapter: the adapter whose interrupts should be cleared
 *
 *      Clears all interrupts.
 */
void t3_intr_clear(struct adapter *adapter)
{
        static const unsigned int cause_reg_addr[] = {
                A_SG_INT_CAUSE,
                A_SG_RSPQ_FL_STATUS,
                A_PCIX_INT_CAUSE,
                A_MC7_INT_CAUSE,
                A_MC7_INT_CAUSE - MC7_PMRX_BASE_ADDR + MC7_PMTX_BASE_ADDR,
                A_MC7_INT_CAUSE - MC7_PMRX_BASE_ADDR + MC7_CM_BASE_ADDR,
                A_CIM_HOST_INT_CAUSE,
                A_TP_INT_CAUSE,
                A_MC5_DB_INT_CAUSE,
                A_ULPRX_INT_CAUSE,
                A_ULPTX_INT_CAUSE,
                A_CPL_INTR_CAUSE,
                A_PM1_TX_INT_CAUSE,
                A_PM1_RX_INT_CAUSE,
                A_MPS_INT_CAUSE,
                A_T3DBG_INT_CAUSE,
        };
        unsigned int i;

        /* Clear PHY and MAC interrupts for each port. */
        for_each_port(adapter, i)
            t3_port_intr_clear(adapter, i);

        for (i = 0; i < ARRAY_SIZE(cause_reg_addr); ++i)
                t3_write_reg(adapter, cause_reg_addr[i], 0xffffffff);

        if (is_pcie(adapter))
                t3_write_reg(adapter, A_PCIE_PEX_ERR, 0xffffffff);
        t3_write_reg(adapter, A_PL_INT_CAUSE0, 0xffffffff);
        t3_read_reg(adapter, A_PL_INT_CAUSE0);  /* flush */
}

void t3_xgm_intr_enable(struct adapter *adapter, int idx)
{
        struct port_info *pi = adap2pinfo(adapter, idx);

        t3_write_reg(adapter, A_XGM_XGM_INT_ENABLE + pi->mac.offset,
                     XGM_EXTRA_INTR_MASK);
}

void t3_xgm_intr_disable(struct adapter *adapter, int idx)
{
        struct port_info *pi = adap2pinfo(adapter, idx);

        t3_write_reg(adapter, A_XGM_XGM_INT_DISABLE + pi->mac.offset,
                     0x7ff);
}

/**
 *      t3_port_intr_enable - enable port-specific interrupts
 *      @adapter: associated adapter
 *      @idx: index of port whose interrupts should be enabled
 *
 *      Enable port-specific (i.e., MAC and PHY) interrupts for the given
 *      adapter port.
 */
void t3_port_intr_enable(struct adapter *adapter, int idx)
{
        struct cphy *phy = &adap2pinfo(adapter, idx)->phy;

        t3_write_reg(adapter, XGM_REG(A_XGM_INT_ENABLE, idx), XGM_INTR_MASK);
        t3_read_reg(adapter, XGM_REG(A_XGM_INT_ENABLE, idx)); /* flush */
        phy->ops->intr_enable(phy);
}

/**
 *      t3_port_intr_disable - disable port-specific interrupts
 *      @adapter: associated adapter
 *      @idx: index of port whose interrupts should be disabled
 *
 *      Disable port-specific (i.e., MAC and PHY) interrupts for the given
 *      adapter port.
 */
void t3_port_intr_disable(struct adapter *adapter, int idx)
{
        struct cphy *phy = &adap2pinfo(adapter, idx)->phy;

        t3_write_reg(adapter, XGM_REG(A_XGM_INT_ENABLE, idx), 0);
        t3_read_reg(adapter, XGM_REG(A_XGM_INT_ENABLE, idx)); /* flush */
        phy->ops->intr_disable(phy);
}

/**
 *      t3_port_intr_clear - clear port-specific interrupts
 *      @adapter: associated adapter
 *      @idx: index of port whose interrupts to clear
 *
 *      Clear port-specific (i.e., MAC and PHY) interrupts for the given
 *      adapter port.
 */
static void t3_port_intr_clear(struct adapter *adapter, int idx)
{
        struct cphy *phy = &adap2pinfo(adapter, idx)->phy;

        t3_write_reg(adapter, XGM_REG(A_XGM_INT_CAUSE, idx), 0xffffffff);
        t3_read_reg(adapter, XGM_REG(A_XGM_INT_CAUSE, idx)); /* flush */
        phy->ops->intr_clear(phy);
}

#define SG_CONTEXT_CMD_ATTEMPTS 100

/**
 *      t3_sge_write_context - write an SGE context
 *      @adapter: the adapter
 *      @id: the context id
 *      @type: the context type
 *
 *      Program an SGE context with the values already loaded in the
 *      CONTEXT_DATA? registers.
 */
static int t3_sge_write_context(struct adapter *adapter, unsigned int id,
                                unsigned int type)
{
        if (type == F_RESPONSEQ) {
                /*
                 * Can't write the Response Queue Context bits for
                 * Interrupt Armed or the Reserve bits after the chip
                 * has been initialized out of reset.  Writing to these
                 * bits can confuse the hardware.
                 */
                t3_write_reg(adapter, A_SG_CONTEXT_MASK0, 0xffffffff);
                t3_write_reg(adapter, A_SG_CONTEXT_MASK1, 0xffffffff);
                t3_write_reg(adapter, A_SG_CONTEXT_MASK2, 0x17ffffff);
                t3_write_reg(adapter, A_SG_CONTEXT_MASK3, 0xffffffff);
        } else {
                t3_write_reg(adapter, A_SG_CONTEXT_MASK0, 0xffffffff);
                t3_write_reg(adapter, A_SG_CONTEXT_MASK1, 0xffffffff);
                t3_write_reg(adapter, A_SG_CONTEXT_MASK2, 0xffffffff);
                t3_write_reg(adapter, A_SG_CONTEXT_MASK3, 0xffffffff);
        }
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | type | V_CONTEXT(id));
        return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
                               0, SG_CONTEXT_CMD_ATTEMPTS, 1);
}

/**
 *      clear_sge_ctxt - completely clear an SGE context
 *      @adapter: the adapter
 *      @id: the context id
 *      @type: the context type
 *
 *      Completely clear an SGE context.  Used predominantly at post-reset
 *      initialization.  Note in particular that we don't skip writing to any
 *      "sensitive bits" in the contexts the way that t3_sge_write_context()
 *      does ...
 */
static int clear_sge_ctxt(struct adapter *adap, unsigned int id,
                          unsigned int type)
{
        t3_write_reg(adap, A_SG_CONTEXT_DATA0, 0);
        t3_write_reg(adap, A_SG_CONTEXT_DATA1, 0);
        t3_write_reg(adap, A_SG_CONTEXT_DATA2, 0);
        t3_write_reg(adap, A_SG_CONTEXT_DATA3, 0);
        t3_write_reg(adap, A_SG_CONTEXT_MASK0, 0xffffffff);
        t3_write_reg(adap, A_SG_CONTEXT_MASK1, 0xffffffff);
        t3_write_reg(adap, A_SG_CONTEXT_MASK2, 0xffffffff);
        t3_write_reg(adap, A_SG_CONTEXT_MASK3, 0xffffffff);
        t3_write_reg(adap, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | type | V_CONTEXT(id));
        return t3_wait_op_done(adap, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
                               0, SG_CONTEXT_CMD_ATTEMPTS, 1);
}

/**
 *      t3_sge_init_ecntxt - initialize an SGE egress context
 *      @adapter: the adapter to configure
 *      @id: the context id
 *      @gts_enable: whether to enable GTS for the context
 *      @type: the egress context type
 *      @respq: associated response queue
 *      @base_addr: base address of queue
 *      @size: number of queue entries
 *      @token: uP token
 *      @gen: initial generation value for the context
 *      @cidx: consumer pointer
 *
 *      Initialize an SGE egress context and make it ready for use.  If the
 *      platform allows concurrent context operations, the caller is
 *      responsible for appropriate locking.
 */
int t3_sge_init_ecntxt(struct adapter *adapter, unsigned int id, int gts_enable,
                       enum sge_context_type type, int respq, u64 base_addr,
                       unsigned int size, unsigned int token, int gen,
                       unsigned int cidx)
{
        unsigned int credits = type == SGE_CNTXT_OFLD ? 0 : FW_WR_NUM;

        if (base_addr & 0xfff)  /* must be 4K aligned */
                return -EINVAL;
        if (t3_read_reg(adapter, A_SG_CONTEXT_CMD) & F_CONTEXT_CMD_BUSY)
                return -EBUSY;

        base_addr >>= 12;
        t3_write_reg(adapter, A_SG_CONTEXT_DATA0, V_EC_INDEX(cidx) |
                     V_EC_CREDITS(credits) | V_EC_GTS(gts_enable));
        t3_write_reg(adapter, A_SG_CONTEXT_DATA1, V_EC_SIZE(size) |
                     V_EC_BASE_LO(base_addr & 0xffff));
        base_addr >>= 16;
        t3_write_reg(adapter, A_SG_CONTEXT_DATA2, base_addr);
        base_addr >>= 32;
        t3_write_reg(adapter, A_SG_CONTEXT_DATA3,
                     V_EC_BASE_HI(base_addr & 0xf) | V_EC_RESPQ(respq) |
                     V_EC_TYPE(type) | V_EC_GEN(gen) | V_EC_UP_TOKEN(token) |
                     F_EC_VALID);
        return t3_sge_write_context(adapter, id, F_EGRESS);
}

/**
 *      t3_sge_init_flcntxt - initialize an SGE free-buffer list context
 *      @adapter: the adapter to configure
 *      @id: the context id
 *      @gts_enable: whether to enable GTS for the context
 *      @base_addr: base address of queue
 *      @size: number of queue entries
 *      @bsize: size of each buffer for this queue
 *      @cong_thres: threshold to signal congestion to upstream producers
 *      @gen: initial generation value for the context
 *      @cidx: consumer pointer
 *
 *      Initialize an SGE free list context and make it ready for use.  The
 *      caller is responsible for ensuring only one context operation occurs
 *      at a time.
 */
int t3_sge_init_flcntxt(struct adapter *adapter, unsigned int id,
                        int gts_enable, u64 base_addr, unsigned int size,
                        unsigned int bsize, unsigned int cong_thres, int gen,
                        unsigned int cidx)
{
        if (base_addr & 0xfff)  /* must be 4K aligned */
                return -EINVAL;
        if (t3_read_reg(adapter, A_SG_CONTEXT_CMD) & F_CONTEXT_CMD_BUSY)
                return -EBUSY;

        base_addr >>= 12;
        t3_write_reg(adapter, A_SG_CONTEXT_DATA0, base_addr);
        base_addr >>= 32;
        t3_write_reg(adapter, A_SG_CONTEXT_DATA1,
                     V_FL_BASE_HI((u32) base_addr) |
                     V_FL_INDEX_LO(cidx & M_FL_INDEX_LO));
        t3_write_reg(adapter, A_SG_CONTEXT_DATA2, V_FL_SIZE(size) |
                     V_FL_GEN(gen) | V_FL_INDEX_HI(cidx >> 12) |
                     V_FL_ENTRY_SIZE_LO(bsize & M_FL_ENTRY_SIZE_LO));
        t3_write_reg(adapter, A_SG_CONTEXT_DATA3,
                     V_FL_ENTRY_SIZE_HI(bsize >> (32 - S_FL_ENTRY_SIZE_LO)) |
                     V_FL_CONG_THRES(cong_thres) | V_FL_GTS(gts_enable));
        return t3_sge_write_context(adapter, id, F_FREELIST);
}

/**
 *      t3_sge_init_rspcntxt - initialize an SGE response queue context
 *      @adapter: the adapter to configure
 *      @id: the context id
 *      @irq_vec_idx: MSI-X interrupt vector index, 0 if no MSI-X, -1 if no IRQ
 *      @base_addr: base address of queue
 *      @size: number of queue entries
 *      @fl_thres: threshold for selecting the normal or jumbo free list
 *      @gen: initial generation value for the context
 *      @cidx: consumer pointer
 *
 *      Initialize an SGE response queue context and make it ready for use.
 *      The caller is responsible for ensuring only one context operation
 *      occurs at a time.
 */
int t3_sge_init_rspcntxt(struct adapter *adapter, unsigned int id,
                         int irq_vec_idx, u64 base_addr, unsigned int size,
                         unsigned int fl_thres, int gen, unsigned int cidx)
{
        unsigned int intr = 0;

        if (base_addr & 0xfff)  /* must be 4K aligned */
                return -EINVAL;
        if (t3_read_reg(adapter, A_SG_CONTEXT_CMD) & F_CONTEXT_CMD_BUSY)
                return -EBUSY;

        base_addr >>= 12;
        t3_write_reg(adapter, A_SG_CONTEXT_DATA0, V_CQ_SIZE(size) |
                     V_CQ_INDEX(cidx));
        t3_write_reg(adapter, A_SG_CONTEXT_DATA1, base_addr);
        base_addr >>= 32;
        if (irq_vec_idx >= 0)
                intr = V_RQ_MSI_VEC(irq_vec_idx) | F_RQ_INTR_EN;
        t3_write_reg(adapter, A_SG_CONTEXT_DATA2,
                     V_CQ_BASE_HI((u32) base_addr) | intr | V_RQ_GEN(gen));
        t3_write_reg(adapter, A_SG_CONTEXT_DATA3, fl_thres);
        return t3_sge_write_context(adapter, id, F_RESPONSEQ);
}

/**
 *      t3_sge_init_cqcntxt - initialize an SGE completion queue context
 *      @adapter: the adapter to configure
 *      @id: the context id
 *      @base_addr: base address of queue
 *      @size: number of queue entries
 *      @rspq: response queue for async notifications
 *      @ovfl_mode: CQ overflow mode
 *      @credits: completion queue credits
 *      @credit_thres: the credit threshold
 *
 *      Initialize an SGE completion queue context and make it ready for use.
 *      The caller is responsible for ensuring only one context operation
 *      occurs at a time.
 */
int t3_sge_init_cqcntxt(struct adapter *adapter, unsigned int id, u64 base_addr,
                        unsigned int size, int rspq, int ovfl_mode,
                        unsigned int credits, unsigned int credit_thres)
{
        if (base_addr & 0xfff)  /* must be 4K aligned */
                return -EINVAL;
        if (t3_read_reg(adapter, A_SG_CONTEXT_CMD) & F_CONTEXT_CMD_BUSY)
                return -EBUSY;

        base_addr >>= 12;
        t3_write_reg(adapter, A_SG_CONTEXT_DATA0, V_CQ_SIZE(size));
        t3_write_reg(adapter, A_SG_CONTEXT_DATA1, base_addr);
        base_addr >>= 32;
        t3_write_reg(adapter, A_SG_CONTEXT_DATA2,
                     V_CQ_BASE_HI((u32) base_addr) | V_CQ_RSPQ(rspq) |
                     V_CQ_GEN(1) | V_CQ_OVERFLOW_MODE(ovfl_mode) |
                     V_CQ_ERR(ovfl_mode));
        t3_write_reg(adapter, A_SG_CONTEXT_DATA3, V_CQ_CREDITS(credits) |
                     V_CQ_CREDIT_THRES(credit_thres));
        return t3_sge_write_context(adapter, id, F_CQ);
}

/**
 *      t3_sge_enable_ecntxt - enable/disable an SGE egress context
 *      @adapter: the adapter
 *      @id: the egress context id
 *      @enable: enable (1) or disable (0) the context
 *
 *      Enable or disable an SGE egress context.  The caller is responsible for
 *      ensuring only one context operation occurs at a time.
 */
int t3_sge_enable_ecntxt(struct adapter *adapter, unsigned int id, int enable)
{
        if (t3_read_reg(adapter, A_SG_CONTEXT_CMD) & F_CONTEXT_CMD_BUSY)
                return -EBUSY;

        t3_write_reg(adapter, A_SG_CONTEXT_MASK0, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_MASK1, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_MASK2, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_MASK3, F_EC_VALID);
        t3_write_reg(adapter, A_SG_CONTEXT_DATA3, V_EC_VALID(enable));
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | F_EGRESS | V_CONTEXT(id));
        return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
                               0, SG_CONTEXT_CMD_ATTEMPTS, 1);
}

/**
 *      t3_sge_disable_fl - disable an SGE free-buffer list
 *      @adapter: the adapter
 *      @id: the free list context id
 *
 *      Disable an SGE free-buffer list.  The caller is responsible for
 *      ensuring only one context operation occurs at a time.
 */
int t3_sge_disable_fl(struct adapter *adapter, unsigned int id)
{
        if (t3_read_reg(adapter, A_SG_CONTEXT_CMD) & F_CONTEXT_CMD_BUSY)
                return -EBUSY;

        t3_write_reg(adapter, A_SG_CONTEXT_MASK0, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_MASK1, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_MASK2, V_FL_SIZE(M_FL_SIZE));
        t3_write_reg(adapter, A_SG_CONTEXT_MASK3, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_DATA2, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | F_FREELIST | V_CONTEXT(id));
        return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
                               0, SG_CONTEXT_CMD_ATTEMPTS, 1);
}

/**
 *      t3_sge_disable_rspcntxt - disable an SGE response queue
 *      @adapter: the adapter
 *      @id: the response queue context id
 *
 *      Disable an SGE response queue.  The caller is responsible for
 *      ensuring only one context operation occurs at a time.
 */
int t3_sge_disable_rspcntxt(struct adapter *adapter, unsigned int id)
{
        if (t3_read_reg(adapter, A_SG_CONTEXT_CMD) & F_CONTEXT_CMD_BUSY)
                return -EBUSY;

        t3_write_reg(adapter, A_SG_CONTEXT_MASK0, V_CQ_SIZE(M_CQ_SIZE));
        t3_write_reg(adapter, A_SG_CONTEXT_MASK1, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_MASK2, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_MASK3, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_DATA0, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | F_RESPONSEQ | V_CONTEXT(id));
        return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
                               0, SG_CONTEXT_CMD_ATTEMPTS, 1);
}

/**
 *      t3_sge_disable_cqcntxt - disable an SGE completion queue
 *      @adapter: the adapter
 *      @id: the completion queue context id
 *
 *      Disable an SGE completion queue.  The caller is responsible for
 *      ensuring only one context operation occurs at a time.
 */
int t3_sge_disable_cqcntxt(struct adapter *adapter, unsigned int id)
{
        if (t3_read_reg(adapter, A_SG_CONTEXT_CMD) & F_CONTEXT_CMD_BUSY)
                return -EBUSY;

        t3_write_reg(adapter, A_SG_CONTEXT_MASK0, V_CQ_SIZE(M_CQ_SIZE));
        t3_write_reg(adapter, A_SG_CONTEXT_MASK1, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_MASK2, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_MASK3, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_DATA0, 0);
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | F_CQ | V_CONTEXT(id));
        return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
                               0, SG_CONTEXT_CMD_ATTEMPTS, 1);
}

/**
 *      t3_sge_cqcntxt_op - perform an operation on a completion queue context
 *      @adapter: the adapter
 *      @id: the context id
 *      @op: the operation to perform
 *
 *      Perform the selected operation on an SGE completion queue context.
 *      The caller is responsible for ensuring only one context operation
 *      occurs at a time.
 */
int t3_sge_cqcntxt_op(struct adapter *adapter, unsigned int id, unsigned int op,
                      unsigned int credits)
{
        u32 val;

        if (t3_read_reg(adapter, A_SG_CONTEXT_CMD) & F_CONTEXT_CMD_BUSY)
                return -EBUSY;

        t3_write_reg(adapter, A_SG_CONTEXT_DATA0, credits << 16);
        t3_write_reg(adapter, A_SG_CONTEXT_CMD, V_CONTEXT_CMD_OPCODE(op) |
                     V_CONTEXT(id) | F_CQ);
        if (t3_wait_op_done_val(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
                                0, SG_CONTEXT_CMD_ATTEMPTS, 1, &val))
                return -EIO;

        if (op >= 2 && op < 7) {
                if (adapter->params.rev > 0)
                        return G_CQ_INDEX(val);

                t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                             V_CONTEXT_CMD_OPCODE(0) | F_CQ | V_CONTEXT(id));
                if (t3_wait_op_done(adapter, A_SG_CONTEXT_CMD,
                                    F_CONTEXT_CMD_BUSY, 0,
                                    SG_CONTEXT_CMD_ATTEMPTS, 1))
                        return -EIO;
                return G_CQ_INDEX(t3_read_reg(adapter, A_SG_CONTEXT_DATA0));
        }
        return 0;
}

/**
 *      t3_config_rss - configure Rx packet steering
 *      @adapter: the adapter
 *      @rss_config: RSS settings (written to TP_RSS_CONFIG)
 *      @cpus: values for the CPU lookup table (0xff terminated)
 *      @rspq: values for the response queue lookup table (0xffff terminated)
 *
 *      Programs the receive packet steering logic.  @cpus and @rspq provide
 *      the values for the CPU and response queue lookup tables.  If they
 *      provide fewer values than the size of the tables the supplied values
 *      are used repeatedly until the tables are fully populated.
 */
void t3_config_rss(struct adapter *adapter, unsigned int rss_config,
                   const u8 * cpus, const u16 *rspq)
{
        int i, j, cpu_idx = 0, q_idx = 0;

        if (cpus)
                for (i = 0; i < RSS_TABLE_SIZE; ++i) {
                        u32 val = i << 16;

                        for (j = 0; j < 2; ++j) {
                                val |= (cpus[cpu_idx++] & 0x3f) << (8 * j);
                                if (cpus[cpu_idx] == 0xff)
                                        cpu_idx = 0;
                        }
                        t3_write_reg(adapter, A_TP_RSS_LKP_TABLE, val);
                }

        if (rspq)
                for (i = 0; i < RSS_TABLE_SIZE; ++i) {
                        t3_write_reg(adapter, A_TP_RSS_MAP_TABLE,
                                     (i << 16) | rspq[q_idx++]);
                        if (rspq[q_idx] == 0xffff)
                                q_idx = 0;
                }

        t3_write_reg(adapter, A_TP_RSS_CONFIG, rss_config);
}

/**
 *      t3_tp_set_offload_mode - put TP in NIC/offload mode
 *      @adap: the adapter
 *      @enable: 1 to select offload mode, 0 for regular NIC
 *
 *      Switches TP to NIC/offload mode.
 */
void t3_tp_set_offload_mode(struct adapter *adap, int enable)
{
        if (is_offload(adap) || !enable)
                t3_set_reg_field(adap, A_TP_IN_CONFIG, F_NICMODE,
                                 V_NICMODE(!enable));
}

/**
 *      pm_num_pages - calculate the number of pages of the payload memory
 *      @mem_size: the size of the payload memory
 *      @pg_size: the size of each payload memory page
 *
 *      Calculate the number of pages, each of the given size, that fit in a
 *      memory of the specified size, respecting the HW requirement that the
 *      number of pages must be a multiple of 24.
 */
static inline unsigned int pm_num_pages(unsigned int mem_size,
                                        unsigned int pg_size)
{
        unsigned int n = mem_size / pg_size;

        return n - n % 24;
}

#define mem_region(adap, start, size, reg) \
        t3_write_reg((adap), A_ ## reg, (start)); \
        start += size

/**
 *      partition_mem - partition memory and configure TP memory settings
 *      @adap: the adapter
 *      @p: the TP parameters
 *
 *      Partitions context and payload memory and configures TP's memory
 *      registers.
 */
static void partition_mem(struct adapter *adap, const struct tp_params *p)
{
        unsigned int m, pstructs, tids = t3_mc5_size(&adap->mc5);
        unsigned int timers = 0, timers_shift = 22;

        if (adap->params.rev > 0) {
                if (tids <= 16 * 1024) {
                        timers = 1;
                        timers_shift = 16;
                } else if (tids <= 64 * 1024) {
                        timers = 2;
                        timers_shift = 18;
                } else if (tids <= 256 * 1024) {
                        timers = 3;
                        timers_shift = 20;
                }
        }

        t3_write_reg(adap, A_TP_PMM_SIZE,
                     p->chan_rx_size | (p->chan_tx_size >> 16));

        t3_write_reg(adap, A_TP_PMM_TX_BASE, 0);
        t3_write_reg(adap, A_TP_PMM_TX_PAGE_SIZE, p->tx_pg_size);
        t3_write_reg(adap, A_TP_PMM_TX_MAX_PAGE, p->tx_num_pgs);
        t3_set_reg_field(adap, A_TP_PARA_REG3, V_TXDATAACKIDX(M_TXDATAACKIDX),
                         V_TXDATAACKIDX(fls(p->tx_pg_size) - 12));

        t3_write_reg(adap, A_TP_PMM_RX_BASE, 0);
        t3_write_reg(adap, A_TP_PMM_RX_PAGE_SIZE, p->rx_pg_size);
        t3_write_reg(adap, A_TP_PMM_RX_MAX_PAGE, p->rx_num_pgs);

        pstructs = p->rx_num_pgs + p->tx_num_pgs;
        /* Add a bit of headroom and make multiple of 24 */
        pstructs += 48;
        pstructs -= pstructs % 24;
        t3_write_reg(adap, A_TP_CMM_MM_MAX_PSTRUCT, pstructs);

        m = tids * TCB_SIZE;
        mem_region(adap, m, (64 << 10) * 64, SG_EGR_CNTX_BADDR);
        mem_region(adap, m, (64 << 10) * 64, SG_CQ_CONTEXT_BADDR);
        t3_write_reg(adap, A_TP_CMM_TIMER_BASE, V_CMTIMERMAXNUM(timers) | m);
        m += ((p->ntimer_qs - 1) << timers_shift) + (1 << 22);
        mem_region(adap, m, pstructs * 64, TP_CMM_MM_BASE);
        mem_region(adap, m, 64 * (pstructs / 24), TP_CMM_MM_PS_FLST_BASE);
        mem_region(adap, m, 64 * (p->rx_num_pgs / 24), TP_CMM_MM_RX_FLST_BASE);
        mem_region(adap, m, 64 * (p->tx_num_pgs / 24), TP_CMM_MM_TX_FLST_BASE);

        m = (m + 4095) & ~0xfff;
        t3_write_reg(adap, A_CIM_SDRAM_BASE_ADDR, m);
        t3_write_reg(adap, A_CIM_SDRAM_ADDR_SIZE, p->cm_size - m);

        tids = (p->cm_size - m - (3 << 20)) / 3072 - 32;
        m = t3_mc5_size(&adap->mc5) - adap->params.mc5.nservers -
            adap->params.mc5.nfilters - adap->params.mc5.nroutes;
        if (tids < m)
                adap->params.mc5.nservers += m - tids;
}

static inline void tp_wr_indirect(struct adapter *adap, unsigned int addr,
                                  u32 val)
{
        t3_write_reg(adap, A_TP_PIO_ADDR, addr);
        t3_write_reg(adap, A_TP_PIO_DATA, val);
}

static void tp_config(struct adapter *adap, const struct tp_params *p)
{
        t3_write_reg(adap, A_TP_GLOBAL_CONFIG, F_TXPACINGENABLE | F_PATHMTU |
                     F_IPCHECKSUMOFFLOAD | F_UDPCHECKSUMOFFLOAD |
                     F_TCPCHECKSUMOFFLOAD | V_IPTTL(64));
        t3_write_reg(adap, A_TP_TCP_OPTIONS, V_MTUDEFAULT(576) |
                     F_MTUENABLE | V_WINDOWSCALEMODE(1) |
                     V_TIMESTAMPSMODE(1) | V_SACKMODE(1) | V_SACKRX(1));
        t3_write_reg(adap, A_TP_DACK_CONFIG, V_AUTOSTATE3(1) |
                     V_AUTOSTATE2(1) | V_AUTOSTATE1(0) |
                     V_BYTETHRESHOLD(26880) | V_MSSTHRESHOLD(2) |
                     F_AUTOCAREFUL | F_AUTOENABLE | V_DACK_MODE(1));
        t3_set_reg_field(adap, A_TP_IN_CONFIG, F_RXFBARBPRIO | F_TXFBARBPRIO,
                         F_IPV6ENABLE | F_NICMODE);
        t3_write_reg(adap, A_TP_TX_RESOURCE_LIMIT, 0x18141814);
        t3_write_reg(adap, A_TP_PARA_REG4, 0x5050105);
        t3_set_reg_field(adap, A_TP_PARA_REG6, 0,
                         adap->params.rev > 0 ? F_ENABLEESND :
                         F_T3A_ENABLEESND);

        t3_set_reg_field(adap, A_TP_PC_CONFIG,
                         F_ENABLEEPCMDAFULL,
                         F_ENABLEOCSPIFULL |F_TXDEFERENABLE | F_HEARBEATDACK |
                         F_TXCONGESTIONMODE | F_RXCONGESTIONMODE);
        t3_set_reg_field(adap, A_TP_PC_CONFIG2, F_CHDRAFULL,
                         F_ENABLEIPV6RSS | F_ENABLENONOFDTNLSYN |
                         F_ENABLEARPMISS | F_DISBLEDAPARBIT0);
        t3_write_reg(adap, A_TP_PROXY_FLOW_CNTL, 1080);
        t3_write_reg(adap, A_TP_PROXY_FLOW_CNTL, 1000);

        if (adap->params.rev > 0) {
                tp_wr_indirect(adap, A_TP_EGRESS_CONFIG, F_REWRITEFORCETOSIZE);
                t3_set_reg_field(adap, A_TP_PARA_REG3, F_TXPACEAUTO,
                                 F_TXPACEAUTO);
                t3_set_reg_field(adap, A_TP_PC_CONFIG, F_LOCKTID, F_LOCKTID);
                t3_set_reg_field(adap, A_TP_PARA_REG3, 0, F_TXPACEAUTOSTRICT);
        } else
                t3_set_reg_field(adap, A_TP_PARA_REG3, 0, F_TXPACEFIXED);

        if (adap->params.rev == T3_REV_C)
                t3_set_reg_field(adap, A_TP_PC_CONFIG,
                                 V_TABLELATENCYDELTA(M_TABLELATENCYDELTA),
                                 V_TABLELATENCYDELTA(4));

        t3_write_reg(adap, A_TP_TX_MOD_QUEUE_WEIGHT1, 0);
        t3_write_reg(adap, A_TP_TX_MOD_QUEUE_WEIGHT0, 0);
        t3_write_reg(adap, A_TP_MOD_CHANNEL_WEIGHT, 0);
        t3_write_reg(adap, A_TP_MOD_RATE_LIMIT, 0xf2200000);
}

/* Desired TP timer resolution in usec */
#define TP_TMR_RES 50

/* TCP timer values in ms */
#define TP_DACK_TIMER 50
#define TP_RTO_MIN    250

/**
 *      tp_set_timers - set TP timing parameters
 *      @adap: the adapter to set
 *      @core_clk: the core clock frequency in Hz
 *
 *      Set TP's timing parameters, such as the various timer resolutions and
 *      the TCP timer values.
 */
static void tp_set_timers(struct adapter *adap, unsigned int core_clk)
{
        unsigned int tre = fls(core_clk / (1000000 / TP_TMR_RES)) - 1;
        unsigned int dack_re = fls(core_clk / 5000) - 1;        /* 200us */
        unsigned int tstamp_re = fls(core_clk / 1000);  /* 1ms, at least */
        unsigned int tps = core_clk >> tre;

        t3_write_reg(adap, A_TP_TIMER_RESOLUTION, V_TIMERRESOLUTION(tre) |
                     V_DELAYEDACKRESOLUTION(dack_re) |
                     V_TIMESTAMPRESOLUTION(tstamp_re));
        t3_write_reg(adap, A_TP_DACK_TIMER,
                     (core_clk >> dack_re) / (1000 / TP_DACK_TIMER));
        t3_write_reg(adap, A_TP_TCP_BACKOFF_REG0, 0x3020100);
        t3_write_reg(adap, A_TP_TCP_BACKOFF_REG1, 0x7060504);
        t3_write_reg(adap, A_TP_TCP_BACKOFF_REG2, 0xb0a0908);
        t3_write_reg(adap, A_TP_TCP_BACKOFF_REG3, 0xf0e0d0c);
        t3_write_reg(adap, A_TP_SHIFT_CNT, V_SYNSHIFTMAX(6) |
                     V_RXTSHIFTMAXR1(4) | V_RXTSHIFTMAXR2(15) |
                     V_PERSHIFTBACKOFFMAX(8) | V_PERSHIFTMAX(8) |
                     V_KEEPALIVEMAX(9));

#define SECONDS * tps

        t3_write_reg(adap, A_TP_MSL, adap->params.rev > 0 ? 0 : 2 SECONDS);
        t3_write_reg(adap, A_TP_RXT_MIN, tps / (1000 / TP_RTO_MIN));
        t3_write_reg(adap, A_TP_RXT_MAX, 64 SECONDS);
        t3_write_reg(adap, A_TP_PERS_MIN, 5 SECONDS);
        t3_write_reg(adap, A_TP_PERS_MAX, 64 SECONDS);
        t3_write_reg(adap, A_TP_KEEP_IDLE, 7200 SECONDS);
        t3_write_reg(adap, A_TP_KEEP_INTVL, 75 SECONDS);
        t3_write_reg(adap, A_TP_INIT_SRTT, 3 SECONDS);
        t3_write_reg(adap, A_TP_FINWAIT2_TIMER, 600 SECONDS);

#undef SECONDS
}

/**
 *      t3_tp_set_coalescing_size - set receive coalescing size
 *      @adap: the adapter
 *      @size: the receive coalescing size
 *      @psh: whether a set PSH bit should deliver coalesced data
 *
 *      Set the receive coalescing size and PSH bit handling.
 */
static int t3_tp_set_coalescing_size(struct adapter *adap,
                                     unsigned int size, int psh)
{
        u32 val;

        if (size > MAX_RX_COALESCING_LEN)
                return -EINVAL;

        val = t3_read_reg(adap, A_TP_PARA_REG3);
        val &= ~(F_RXCOALESCEENABLE | F_RXCOALESCEPSHEN);

        if (size) {
                val |= F_RXCOALESCEENABLE;
                if (psh)
                        val |= F_RXCOALESCEPSHEN;
                size = min(MAX_RX_COALESCING_LEN, size);
                t3_write_reg(adap, A_TP_PARA_REG2, V_RXCOALESCESIZE(size) |
                             V_MAXRXDATA(MAX_RX_COALESCING_LEN));
        }
        t3_write_reg(adap, A_TP_PARA_REG3, val);
        return 0;
}

/**
 *      t3_tp_set_max_rxsize - set the max receive size
 *      @adap: the adapter
 *      @size: the max receive size
 *
 *      Set TP's max receive size.  This is the limit that applies when
 *      receive coalescing is disabled.
 */
static void t3_tp_set_max_rxsize(struct adapter *adap, unsigned int size)
{
        t3_write_reg(adap, A_TP_PARA_REG7,
                     V_PMMAXXFERLEN0(size) | V_PMMAXXFERLEN1(size));
}

static void init_mtus(unsigned short mtus[])
{
        /*
         * See draft-mathis-plpmtud-00.txt for the values.  The min is 88 so
         * it can accommodate max size TCP/IP headers when SACK and timestamps
         * are enabled and still have at least 8 bytes of payload.
         */
        mtus[0] = 88;
        mtus[1] = 88;
        mtus[2] = 256;
        mtus[3] = 512;
        mtus[4] = 576;
        mtus[5] = 1024;
        mtus[6] = 1280;
        mtus[7] = 1492;
        mtus[8] = 1500;
        mtus[9] = 2002;
        mtus[10] = 2048;
        mtus[11] = 4096;
        mtus[12] = 4352;
        mtus[13] = 8192;
        mtus[14] = 9000;
        mtus[15] = 9600;
}

/*
 * Initial congestion control parameters.
 */
static void init_cong_ctrl(unsigned short *a, unsigned short *b)
{
        a[0] = a[1] = a[2] = a[3] = a[4] = a[5] = a[6] = a[7] = a[8] = 1;
        a[9] = 2;
        a[10] = 3;
        a[11] = 4;
        a[12] = 5;
        a[13] = 6;
        a[14] = 7;
        a[15] = 8;
        a[16] = 9;
        a[17] = 10;
        a[18] = 14;
        a[19] = 17;
        a[20] = 21;
        a[21] = 25;
        a[22] = 30;
        a[23] = 35;
        a[24] = 45;
        a[25] = 60;
        a[26] = 80;
        a[27] = 100;
        a[28] = 200;
        a[29] = 300;
        a[30] = 400;
        a[31] = 500;

        b[0] = b[1] = b[2] = b[3] = b[4] = b[5] = b[6] = b[7] = b[8] = 0;
        b[9] = b[10] = 1;
        b[11] = b[12] = 2;
        b[13] = b[14] = b[15] = b[16] = 3;
        b[17] = b[18] = b[19] = b[20] = b[21] = 4;
        b[22] = b[23] = b[24] = b[25] = b[26] = b[27] = 5;
        b[28] = b[29] = 6;
        b[30] = b[31] = 7;
}

/* The minimum additive increment value for the congestion control table */
#define CC_MIN_INCR 2U

/**
 *      t3_load_mtus - write the MTU and congestion control HW tables
 *      @adap: the adapter
 *      @mtus: the unrestricted values for the MTU table
 *      @alphs: the values for the congestion control alpha parameter
 *      @beta: the values for the congestion control beta parameter
 *      @mtu_cap: the maximum permitted effective MTU
 *
 *      Write the MTU table with the supplied MTUs capping each at &mtu_cap.
 *      Update the high-speed congestion control table with the supplied alpha,
 *      beta, and MTUs.
 */
void t3_load_mtus(struct adapter *adap, unsigned short mtus[NMTUS],
                  unsigned short alpha[NCCTRL_WIN],
                  unsigned short beta[NCCTRL_WIN], unsigned short mtu_cap)
{
        static const unsigned int avg_pkts[NCCTRL_WIN] = {
                2, 6, 10, 14, 20, 28, 40, 56, 80, 112, 160, 224, 320, 448, 640,
                896, 1281, 1792, 2560, 3584, 5120, 7168, 10240, 14336, 20480,
                28672, 40960, 57344, 81920, 114688, 163840, 229376
        };

        unsigned int i, w;

        for (i = 0; i < NMTUS; ++i) {
                unsigned int mtu = min(mtus[i], mtu_cap);
                unsigned int log2 = fls(mtu);

                if (!(mtu & ((1 << log2) >> 2)))        /* round */
                        log2--;
                t3_write_reg(adap, A_TP_MTU_TABLE,
                             (i << 24) | (log2 << 16) | mtu);

                for (w = 0; w < NCCTRL_WIN; ++w) {
                        unsigned int inc;

                        inc = max(((mtu - 40) * alpha[w]) / avg_pkts[w],
                                  CC_MIN_INCR);

                        t3_write_reg(adap, A_TP_CCTRL_TABLE, (i << 21) |
                                     (w << 16) | (beta[w] << 13) | inc);
                }
        }
}

/**
 *      t3_tp_get_mib_stats - read TP's MIB counters
 *      @adap: the adapter
 *      @tps: holds the returned counter values
 *
 *      Returns the values of TP's MIB counters.
 */
void t3_tp_get_mib_stats(struct adapter *adap, struct tp_mib_stats *tps)
{
        t3_read_indirect(adap, A_TP_MIB_INDEX, A_TP_MIB_RDATA, (u32 *) tps,
                         sizeof(*tps) / sizeof(u32), 0);
}

#define ulp_region(adap, name, start, len) \
        t3_write_reg((adap), A_ULPRX_ ## name ## _LLIMIT, (start)); \
        t3_write_reg((adap), A_ULPRX_ ## name ## _ULIMIT, \
                     (start) + (len) - 1); \
        start += len

#define ulptx_region(adap, name, start, len) \
        t3_write_reg((adap), A_ULPTX_ ## name ## _LLIMIT, (start)); \
        t3_write_reg((adap), A_ULPTX_ ## name ## _ULIMIT, \
                     (start) + (len) - 1)

static void ulp_config(struct adapter *adap, const struct tp_params *p)
{
        unsigned int m = p->chan_rx_size;

        ulp_region(adap, ISCSI, m, p->chan_rx_size / 8);
        ulp_region(adap, TDDP, m, p->chan_rx_size / 8);
        ulptx_region(adap, TPT, m, p->chan_rx_size / 4);
        ulp_region(adap, STAG, m, p->chan_rx_size / 4);
        ulp_region(adap, RQ, m, p->chan_rx_size / 4);
        ulptx_region(adap, PBL, m, p->chan_rx_size / 4);
        ulp_region(adap, PBL, m, p->chan_rx_size / 4);
        t3_write_reg(adap, A_ULPRX_TDDP_TAGMASK, 0xffffffff);
}

/**
 *      t3_set_proto_sram - set the contents of the protocol sram
 *      @adapter: the adapter
 *      @data: the protocol image
 *
 *      Write the contents of the protocol SRAM.
 */
int t3_set_proto_sram(struct adapter *adap, const u8 *data)
{
        int i;
        const __be32 *buf = (const __be32 *)data;

        for (i = 0; i < PROTO_SRAM_LINES; i++) {
                t3_write_reg(adap, A_TP_EMBED_OP_FIELD5, be32_to_cpu(*buf++));
                t3_write_reg(adap, A_TP_EMBED_OP_FIELD4, be32_to_cpu(*buf++));
                t3_write_reg(adap, A_TP_EMBED_OP_FIELD3, be32_to_cpu(*buf++));
                t3_write_reg(adap, A_TP_EMBED_OP_FIELD2, be32_to_cpu(*buf++));
                t3_write_reg(adap, A_TP_EMBED_OP_FIELD1, be32_to_cpu(*buf++));

                t3_write_reg(adap, A_TP_EMBED_OP_FIELD0, i << 1 | 1 << 31);
                if (t3_wait_op_done(adap, A_TP_EMBED_OP_FIELD0, 1, 1, 5, 1))
                        return -EIO;
        }
        t3_write_reg(adap, A_TP_EMBED_OP_FIELD0, 0);

        return 0;
}

void t3_config_trace_filter(struct adapter *adapter,
                            const struct trace_params *tp, int filter_index,
                            int invert, int enable)
{
        u32 addr, key[4], mask[4];