xref: /openbmc/linux/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c (revision d0ea5cbd)

/*
 * 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, u8 len, unsigned int base, unsigned int *val)
{
	char tok[256];

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

static int vpdstrtou16(char *s, u8 len, unsigned int base, u16 *val)
{
	char tok[256];

	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
 *	@adap: 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
 *	@credits: credit value to write
 *
 *	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
 *	@alpha: 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
 *	@adap: 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];

	key[0] = tp->sport | (tp->sip << 16);
	key[1] = (tp->sip >> 16) | (tp->dport << 16);
	key[2] = tp->dip;
	key[3] = tp->proto | (tp->vlan << 8) | (tp->intf << 20);

	mask[0] = tp->sport_mask | (tp->sip_mask << 16);
	mask[1] = (tp->sip_mask >> 16) | (tp->dport_mask << 16);
	mask[2] = tp->dip_mask;
	mask[3] = tp->proto_mask | (tp->vlan_mask << 8) | (tp->intf_mask << 20);

	if (invert)
		key[3] |= (1 << 29);
	if (enable)
		key[3] |= (1 << 28);

	addr = filter_index ? A_TP_RX_TRC_KEY0 : A_TP_TX_TRC_KEY0;
	tp_wr_indirect(adapter, addr++, key[0]);
	tp_wr_indirect(adapter, addr++, mask[0]);
	tp_wr_indirect(adapter, addr++, key[1]);
	tp_wr_indirect(adapter, addr++, mask[1]);
	tp_wr_indirect(adapter, addr++, key[2]);
	tp_wr_indirect(adapter, addr++, mask[2]);
	tp_wr_indirect(adapter, addr++, key[3]);
	tp_wr_indirect(adapter, addr, mask[3]);
	t3_read_reg(adapter, A_TP_PIO_DATA);
}

/**
 *	t3_config_sched - configure a HW traffic scheduler
 *	@adap: the adapter
 *	@kbps: target rate in Kbps
 *	@sched: the scheduler index
 *
 *	Configure a HW scheduler for the target rate
 */
int t3_config_sched(struct adapter *adap, unsigned int kbps, int sched)
{
	unsigned int v, tps, cpt, bpt, delta, mindelta = ~0;
	unsigned int clk = adap->params.vpd.cclk * 1000;
	unsigned int selected_cpt = 0, selected_bpt = 0;

	if (kbps > 0) {
		kbps *= 125;	/* -> bytes */
		for (cpt = 1; cpt <= 255; cpt++) {
			tps = clk / cpt;
			bpt = (kbps + tps / 2) / tps;
			if (bpt > 0 && bpt <= 255) {
				v = bpt * tps;
				delta = v >= kbps ? v - kbps : kbps - v;
				if (delta <= mindelta) {
					mindelta = delta;
					selected_cpt = cpt;
					selected_bpt = bpt;
				}
			} else if (selected_cpt)
				break;
		}
		if (!selected_cpt)
			return -EINVAL;
	}
	t3_write_reg(adap, A_TP_TM_PIO_ADDR,
		     A_TP_TX_MOD_Q1_Q0_RATE_LIMIT - sched / 2);
	v = t3_read_reg(adap, A_TP_TM_PIO_DATA);
	if (sched & 1)
		v = (v & 0xffff) | (selected_cpt << 16) | (selected_bpt << 24);
	else
		v = (v & 0xffff0000) | selected_cpt | (selected_bpt << 8);
	t3_write_reg(adap, A_TP_TM_PIO_DATA, v);
	return 0;
}

static int tp_init(struct adapter *adap, const struct tp_params *p)
{
	int busy = 0;

	tp_config(adap, p);
	t3_set_vlan_accel(adap, 3, 0);

	if (is_offload(adap)) {
		tp_set_timers(adap, adap->params.vpd.cclk * 1000);
		t3_write_reg(adap, A_TP_RESET, F_FLSTINITENABLE);
		busy = t3_wait_op_done(adap, A_TP_RESET, F_FLSTINITENABLE,
				       0, 1000, 5);
		if (busy)
			CH_ERR(adap, "TP initialization timed out\n");
	}

	if (!busy)
		t3_write_reg(adap, A_TP_RESET, F_TPRESET);
	return busy;
}

/*
 * Perform the bits of HW initialization that are dependent on the Tx
 * channels being used.
 */
static void chan_init_hw(struct adapter *adap, unsigned int chan_map)
{
	int i;

	if (chan_map != 3) {                                 /* one channel */
		t3_set_reg_field(adap, A_ULPRX_CTL, F_ROUND_ROBIN, 0);
		t3_set_reg_field(adap, A_ULPTX_CONFIG, F_CFG_RR_ARB, 0);
		t3_write_reg(adap, A_MPS_CFG, F_TPRXPORTEN | F_ENFORCEPKT |
			     (chan_map == 1 ? F_TPTXPORT0EN | F_PORT0ACTIVE :
					      F_TPTXPORT1EN | F_PORT1ACTIVE));
		t3_write_reg(adap, A_PM1_TX_CFG,
			     chan_map == 1 ? 0xffffffff : 0);
	} else {                                             /* two channels */
		t3_set_reg_field(adap, A_ULPRX_CTL, 0, F_ROUND_ROBIN);
		t3_set_reg_field(adap, A_ULPTX_CONFIG, 0, F_CFG_RR_ARB);
		t3_write_reg(adap, A_ULPTX_DMA_WEIGHT,
			     V_D1_WEIGHT(16) | V_D0_WEIGHT(16));
		t3_write_reg(adap, A_MPS_CFG, F_TPTXPORT0EN | F_TPTXPORT1EN |
			     F_TPRXPORTEN | F_PORT0ACTIVE | F_PORT1ACTIVE |
			     F_ENFORCEPKT);
		t3_write_reg(adap, A_PM1_TX_CFG, 0x80008000);
		t3_set_reg_field(adap, A_TP_PC_CONFIG, 0, F_TXTOSQUEUEMAPMODE);
		t3_write_reg(adap, A_TP_TX_MOD_QUEUE_REQ_MAP,
			     V_TX_MOD_QUEUE_REQ_MAP(0xaa));
		for (i = 0; i < 16; i++)
			t3_write_reg(adap, A_TP_TX_MOD_QUE_TABLE,
				     (i << 16) | 0x1010);
	}
}

static int calibrate_xgm(struct adapter *adapter)
{
	if (uses_xaui(adapter)) {
		unsigned int v, i;

		for (i = 0; i < 5; ++i) {
			t3_write_reg(adapter, A_XGM_XAUI_IMP, 0);
			t3_read_reg(adapter, A_XGM_XAUI_IMP);
			msleep(1);
			v = t3_read_reg(adapter, A_XGM_XAUI_IMP);
			if (!(v & (F_XGM_CALFAULT | F_CALBUSY))) {
				t3_write_reg(adapter, A_XGM_XAUI_IMP,
					     V_XAUIIMP(G_CALIMP(v) >> 2));
				return 0;
			}
		}
		CH_ERR(adapter, "MAC calibration failed\n");
		return -1;
	} else {
		t3_write_reg(adapter, A_XGM_RGMII_IMP,
			     V_RGMIIIMPPD(2) | V_RGMIIIMPPU(3));
		t3_set_reg_field(adapter, A_XGM_RGMII_IMP, F_XGM_IMPSETUPDATE,
				 F_XGM_IMPSETUPDATE);
	}
	return 0;
}

static void calibrate_xgm_t3b(struct adapter *adapter)
{
	if (!uses_xaui(adapter)) {
		t3_write_reg(adapter, A_XGM_RGMII_IMP, F_CALRESET |
			     F_CALUPDATE | V_RGMIIIMPPD(2) | V_RGMIIIMPPU(3));
		t3_set_reg_field(adapter, A_XGM_RGMII_IMP, F_CALRESET, 0);
		t3_set_reg_field(adapter, A_XGM_RGMII_IMP, 0,
				 F_XGM_IMPSETUPDATE);
		t3_set_reg_field(adapter, A_XGM_RGMII_IMP, F_XGM_IMPSETUPDATE,
				 0);
		t3_set_reg_field(adapter, A_XGM_RGMII_IMP, F_CALUPDATE, 0);
		t3_set_reg_field(adapter, A_XGM_RGMII_IMP, 0, F_CALUPDATE);
	}
}

struct mc7_timing_params {
	unsigned char ActToPreDly;
	unsigned char ActToRdWrDly;
	unsigned char PreCyc;
	unsigned char RefCyc[5];
	unsigned char BkCyc;
	unsigned char WrToRdDly;
	unsigned char RdToWrDly;
};

/*
 * Write a value to a register and check that the write completed.  These
 * writes normally complete in a cycle or two, so one read should suffice.
 * The very first read exists to flush the posted write to the device.
 */
static int wrreg_wait(struct adapter *adapter, unsigned int addr, u32 val)
{
	t3_write_reg(adapter, addr, val);
	t3_read_reg(adapter, addr);	/* flush */
	if (!(t3_read_reg(adapter, addr) & F_BUSY))
		return 0;
	CH_ERR(adapter, "write to MC7 register 0x%x timed out\n", addr);
	return -EIO;
}

static int mc7_init(struct mc7 *mc7, unsigned int mc7_clock, int mem_type)
{
	static const unsigned int mc7_mode[] = {
		0x632, 0x642, 0x652, 0x432, 0x442
	};
	static const struct mc7_timing_params mc7_timings[] = {
		{12, 3, 4, {20, 28, 34, 52, 0}, 15, 6, 4},
		{12, 4, 5, {20, 28, 34, 52, 0}, 16, 7, 4},
		{12, 5, 6, {20, 28, 34, 52, 0}, 17, 8, 4},
		{9, 3, 4, {15, 21, 26, 39, 0}, 12, 6, 4},
		{9, 4, 5, {15, 21, 26, 39, 0}, 13, 7, 4}
	};

	u32 val;
	unsigned int width, density, slow, attempts;
	struct adapter *adapter = mc7->adapter;
	const struct mc7_timing_params *p = &mc7_timings[mem_type];

	if (!mc7->size)
		return 0;

	val = t3_read_reg(adapter, mc7->offset + A_MC7_CFG);
	slow = val & F_SLOW;
	width = G_WIDTH(val);
	density = G_DEN(val);

	t3_write_reg(adapter, mc7->offset + A_MC7_CFG, val | F_IFEN);
	val = t3_read_reg(adapter, mc7->offset + A_MC7_CFG);	/* flush */
	msleep(1);

	if (!slow) {
		t3_write_reg(adapter, mc7->offset + A_MC7_CAL, F_SGL_CAL_EN);
		t3_read_reg(adapter, mc7->offset + A_MC7_CAL);
		msleep(1);
		if (t3_read_reg(adapter, mc7->offset + A_MC7_CAL) &
		    (F_BUSY | F_SGL_CAL_EN | F_CAL_FAULT)) {
			CH_ERR(adapter, "%s MC7 calibration timed out\n",
			       mc7->name);
			goto out_fail;
		}
	}

	t3_write_reg(adapter, mc7->offset + A_MC7_PARM,
		     V_ACTTOPREDLY(p->ActToPreDly) |
		     V_ACTTORDWRDLY(p->ActToRdWrDly) | V_PRECYC(p->PreCyc) |
		     V_REFCYC(p->RefCyc[density]) | V_BKCYC(p->BkCyc) |
		     V_WRTORDDLY(p->WrToRdDly) | V_RDTOWRDLY(p->RdToWrDly));

	t3_write_reg(adapter, mc7->offset + A_MC7_CFG,
		     val | F_CLKEN | F_TERM150);
	t3_read_reg(adapter, mc7->offset + A_MC7_CFG);	/* flush */

	if (!slow)
		t3_set_reg_field(adapter, mc7->offset + A_MC7_DLL, F_DLLENB,
				 F_DLLENB);
	udelay(1);

	val = slow ? 3 : 6;
	if (wrreg_wait(adapter, mc7->offset + A_MC7_PRE, 0) ||
	    wrreg_wait(adapter, mc7->offset + A_MC7_EXT_MODE2, 0) ||
	    wrreg_wait(adapter, mc7->offset + A_MC7_EXT_MODE3, 0) ||
	    wrreg_wait(adapter, mc7->offset + A_MC7_EXT_MODE1, val))
		goto out_fail;

	if (!slow) {
		t3_write_reg(adapter, mc7->offset + A_MC7_MODE, 0x100);
		t3_set_reg_field(adapter, mc7->offset + A_MC7_DLL, F_DLLRST, 0);
		udelay(5);
	}

	if (wrreg_wait(adapter, mc7->offset + A_MC7_PRE, 0) ||
	    wrreg_wait(adapter, mc7->offset + A_MC7_REF, 0) ||
	    wrreg_wait(adapter, mc7->offset + A_MC7_REF, 0) ||
	    wrreg_wait(adapter, mc7->offset + A_MC7_MODE,
		       mc7_mode[mem_type]) ||
	    wrreg_wait(adapter, mc7->offset + A_MC7_EXT_MODE1, val | 0x380) ||
	    wrreg_wait(adapter, mc7->offset + A_MC7_EXT_MODE1, val))
		goto out_fail;

	/* clock value is in KHz */
	mc7_clock = mc7_clock * 7812 + mc7_clock / 2;	/* ns */
	mc7_clock /= 1000000;	/* KHz->MHz, ns->us */

	t3_write_reg(adapter, mc7->offset + A_MC7_REF,
		     F_PERREFEN | V_PREREFDIV(mc7_clock));
	t3_read_reg(adapter, mc7->offset + A_MC7_REF);	/* flush */

	t3_write_reg(adapter, mc7->offset + A_MC7_ECC, F_ECCGENEN | F_ECCCHKEN);
	t3_write_reg(adapter, mc7->offset + A_MC7_BIST_DATA, 0);
	t3_write_reg(adapter, mc7->offset + A_MC7_BIST_ADDR_BEG, 0);
	t3_write_reg(adapter, mc7->offset + A_MC7_BIST_ADDR_END,
		     (mc7->size << width) - 1);
	t3_write_reg(adapter, mc7->offset + A_MC7_BIST_OP, V_OP(1));
	t3_read_reg(adapter, mc7->offset + A_MC7_BIST_OP);	/* flush */

	attempts = 50;
	do {
		msleep(250);
		val = t3_read_reg(adapter, mc7->offset + A_MC7_BIST_OP);
	} while ((val & F_BUSY) && --attempts);
	if (val & F_BUSY) {
		CH_ERR(adapter, "%s MC7 BIST timed out\n", mc7->name);
		goto out_fail;
	}

	/* Enable normal memory accesses. */
	t3_set_reg_field(adapter, mc7->offset + A_MC7_CFG, 0, F_RDY);
	return 0;

out_fail:
	return -1;
}

static void config_pcie(struct adapter *adap)
{
	static const u16 ack_lat[4][6] = {
		{237, 416, 559, 1071, 2095, 4143},
		{128, 217, 289, 545, 1057, 2081},
		{73, 118, 154, 282, 538, 1050},
		{67, 107, 86, 150, 278, 534}
	};
	static const u16 rpl_tmr[4][6] = {
		{711, 1248, 1677, 3213, 6285, 12429},
		{384, 651, 867, 1635, 3171, 6243},
		{219, 354, 462, 846, 1614, 3150},
		{201, 321, 258, 450, 834, 1602}
	};

	u16 val, devid;
	unsigned int log2_width, pldsize;
	unsigned int fst_trn_rx, fst_trn_tx, acklat, rpllmt;

	pcie_capability_read_word(adap->pdev, PCI_EXP_DEVCTL, &val);
	pldsize = (val & PCI_EXP_DEVCTL_PAYLOAD) >> 5;

	pci_read_config_word(adap->pdev, 0x2, &devid);
	if (devid == 0x37) {
		pcie_capability_write_word(adap->pdev, PCI_EXP_DEVCTL,
					   val & ~PCI_EXP_DEVCTL_READRQ &
					   ~PCI_EXP_DEVCTL_PAYLOAD);
		pldsize = 0;
	}

	pcie_capability_read_word(adap->pdev, PCI_EXP_LNKCTL, &val);

	fst_trn_tx = G_NUMFSTTRNSEQ(t3_read_reg(adap, A_PCIE_PEX_CTRL0));
	fst_trn_rx = adap->params.rev == 0 ? fst_trn_tx :
	    G_NUMFSTTRNSEQRX(t3_read_reg(adap, A_PCIE_MODE));
	log2_width = fls(adap->params.pci.width) - 1;
	acklat = ack_lat[log2_width][pldsize];
	if (val & PCI_EXP_LNKCTL_ASPM_L0S)	/* check LOsEnable */
		acklat += fst_trn_tx * 4;
	rpllmt = rpl_tmr[log2_width][pldsize] + fst_trn_rx * 4;

	if (adap->params.rev == 0)
		t3_set_reg_field(adap, A_PCIE_PEX_CTRL1,
				 V_T3A_ACKLAT(M_T3A_ACKLAT),
				 V_T3A_ACKLAT(acklat));
	else
		t3_set_reg_field(adap, A_PCIE_PEX_CTRL1, V_ACKLAT(M_ACKLAT),
				 V_ACKLAT(acklat));

	t3_set_reg_field(adap, A_PCIE_PEX_CTRL0, V_REPLAYLMT(M_REPLAYLMT),
			 V_REPLAYLMT(rpllmt));

	t3_write_reg(adap, A_PCIE_PEX_ERR, 0xffffffff);
	t3_set_reg_field(adap, A_PCIE_CFG, 0,
			 F_ENABLELINKDWNDRST | F_ENABLELINKDOWNRST |
			 F_PCIE_DMASTOPEN | F_PCIE_CLIDECEN);
}

/*
 * Initialize and configure T3 HW modules.  This performs the
 * initialization steps that need to be done once after a card is reset.
 * MAC and PHY initialization is handled separarely whenever a port is enabled.
 *
 * fw_params are passed to FW and their value is platform dependent.  Only the
 * top 8 bits are available for use, the rest must be 0.
 */
int t3_init_hw(struct adapter *adapter, u32 fw_params)
{
	int err = -EIO, attempts, i;
	const struct vpd_params *vpd = &adapter->params.vpd;

	if (adapter->params.rev > 0)
		calibrate_xgm_t3b(adapter);
	else if (calibrate_xgm(adapter))
		goto out_err;

	if (vpd->mclk) {
		partition_mem(adapter, &adapter->params.tp);

		if (mc7_init(&adapter->pmrx, vpd->mclk, vpd->mem_timing) ||
		    mc7_init(&adapter->pmtx, vpd->mclk, vpd->mem_timing) ||
		    mc7_init(&adapter->cm, vpd->mclk, vpd->mem_timing) ||
		    t3_mc5_init(&adapter->mc5, adapter->params.mc5.nservers,
				adapter->params.mc5.nfilters,
				adapter->params.mc5.nroutes))
			goto out_err;

		for (i = 0; i < 32; i++)
			if (clear_sge_ctxt(adapter, i, F_CQ))
				goto out_err;
	}

	if (tp_init(adapter, &adapter->params.tp))
		goto out_err;

	t3_tp_set_coalescing_size(adapter,
				  min(adapter->params.sge.max_pkt_size,
				      MAX_RX_COALESCING_LEN), 1);
	t3_tp_set_max_rxsize(adapter,
			     min(adapter->params.sge.max_pkt_size, 16384U));
	ulp_config(adapter, &adapter->params.tp);

	if (is_pcie(adapter))
		config_pcie(adapter);
	else
		t3_set_reg_field(adapter, A_PCIX_CFG, 0,
				 F_DMASTOPEN | F_CLIDECEN);

	if (adapter->params.rev == T3_REV_C)
		t3_set_reg_field(adapter, A_ULPTX_CONFIG, 0,
				 F_CFG_CQE_SOP_MASK);

	t3_write_reg(adapter, A_PM1_RX_CFG, 0xffffffff);
	t3_write_reg(adapter, A_PM1_RX_MODE, 0);
	t3_write_reg(adapter, A_PM1_TX_MODE, 0);
	chan_init_hw(adapter, adapter->params.chan_map);
	t3_sge_init(adapter, &adapter->params.sge);
	t3_set_reg_field(adapter, A_PL_RST, 0, F_FATALPERREN);

	t3_write_reg(adapter, A_T3DBG_GPIO_ACT_LOW, calc_gpio_intr(adapter));

	t3_write_reg(adapter, A_CIM_HOST_ACC_DATA, vpd->uclk | fw_params);
	t3_write_reg(adapter, A_CIM_BOOT_CFG,
		     V_BOOTADDR(FW_FLASH_BOOT_ADDR >> 2));
	t3_read_reg(adapter, A_CIM_BOOT_CFG);	/* flush */

	attempts = 100;
	do {			/* wait for uP to initialize */
		msleep(20);
	} while (t3_read_reg(adapter, A_CIM_HOST_ACC_DATA) && --attempts);
	if (!attempts) {
		CH_ERR(adapter, "uP initialization timed out\n");
		goto out_err;
	}

	err = 0;
out_err:
	return err;
}

/**
 *	get_pci_mode - determine a card's PCI mode
 *	@adapter: the adapter
 *	@p: where to store the PCI settings
 *
 *	Determines a card's PCI mode and associated parameters, such as speed
 *	and width.
 */
static void get_pci_mode(struct adapter *adapter, struct pci_params *p)
{
	static unsigned short speed_map[] = { 33, 66, 100, 133 };
	u32 pci_mode;

	if (pci_is_pcie(adapter->pdev)) {
		u16 val;

		p->variant = PCI_VARIANT_PCIE;
		pcie_capability_read_word(adapter->pdev, PCI_EXP_LNKSTA, &val);
		p->width = (val >> 4) & 0x3f;
		return;
	}

	pci_mode = t3_read_reg(adapter, A_PCIX_MODE);
	p->speed = speed_map[G_PCLKRANGE(pci_mode)];
	p->width = (pci_mode & F_64BIT) ? 64 : 32;
	pci_mode = G_PCIXINITPAT(pci_mode);
	if (pci_mode == 0)
		p->variant = PCI_VARIANT_PCI;
	else if (pci_mode < 4)
		p->variant = PCI_VARIANT_PCIX_MODE1_PARITY;
	else if (pci_mode < 8)
		p->variant = PCI_VARIANT_PCIX_MODE1_ECC;
	else
		p->variant = PCI_VARIANT_PCIX_266_MODE2;
}

/**
 *	init_link_config - initialize a link's SW state
 *	@lc: structure holding the link state
 *	@caps: information about the current card
 *
 *	Initializes the SW state maintained for each link, including the link's
 *	capabilities and default speed/duplex/flow-control/autonegotiation
 *	settings.
 */
static void init_link_config(struct link_config *lc, unsigned int caps)
{
	lc->supported = caps;
	lc->requested_speed = lc->speed = SPEED_INVALID;
	lc->requested_duplex = lc->duplex = DUPLEX_INVALID;
	lc->requested_fc = lc->fc = PAUSE_RX | PAUSE_TX;
	if (lc->supported & SUPPORTED_Autoneg) {
		lc->advertising = lc->supported;
		lc->autoneg = AUTONEG_ENABLE;
		lc->requested_fc |= PAUSE_AUTONEG;
	} else {
		lc->advertising = 0;
		lc->autoneg = AUTONEG_DISABLE;
	}
}

/**
 *	mc7_calc_size - calculate MC7 memory size
 *	@cfg: the MC7 configuration
 *
 *	Calculates the size of an MC7 memory in bytes from the value of its
 *	configuration register.
 */
static unsigned int mc7_calc_size(u32 cfg)
{
	unsigned int width = G_WIDTH(cfg);
	unsigned int banks = !!(cfg & F_BKS) + 1;
	unsigned int org = !!(cfg & F_ORG) + 1;
	unsigned int density = G_DEN(cfg);
	unsigned int MBs = ((256 << density) * banks) / (org << width);

	return MBs << 20;
}

static void mc7_prep(struct adapter *adapter, struct mc7 *mc7,
		     unsigned int base_addr, const char *name)
{
	u32 cfg;

	mc7->adapter = adapter;
	mc7->name = name;
	mc7->offset = base_addr - MC7_PMRX_BASE_ADDR;
	cfg = t3_read_reg(adapter, mc7->offset + A_MC7_CFG);
	mc7->size = G_DEN(cfg) == M_DEN ? 0 : mc7_calc_size(cfg);
	mc7->width = G_WIDTH(cfg);
}

static void mac_prep(struct cmac *mac, struct adapter *adapter, int index)
{
	u16 devid;

	mac->adapter = adapter;
	pci_read_config_word(adapter->pdev, 0x2, &devid);

	if (devid == 0x37 && !adapter->params.vpd.xauicfg[1])
		index = 0;
	mac->offset = (XGMAC0_1_BASE_ADDR - XGMAC0_0_BASE_ADDR) * index;
	mac->nucast = 1;

	if (adapter->params.rev == 0 && uses_xaui(adapter)) {
		t3_write_reg(adapter, A_XGM_SERDES_CTRL + mac->offset,
			     is_10G(adapter) ? 0x2901c04 : 0x2301c04);
		t3_set_reg_field(adapter, A_XGM_PORT_CFG + mac->offset,
				 F_ENRGMII, 0);
	}
}

static void early_hw_init(struct adapter *adapter,
			  const struct adapter_info *ai)
{
	u32 val = V_PORTSPEED(is_10G(adapter) ? 3 : 2);

	mi1_init(adapter, ai);
	t3_write_reg(adapter, A_I2C_CFG,	/* set for 80KHz */
		     V_I2C_CLKDIV(adapter->params.vpd.cclk / 80 - 1));
	t3_write_reg(adapter, A_T3DBG_GPIO_EN,
		     ai->gpio_out | F_GPIO0_OEN | F_GPIO0_OUT_VAL);
	t3_write_reg(adapter, A_MC5_DB_SERVER_INDEX, 0);
	t3_write_reg(adapter, A_SG_OCO_BASE, V_BASE1(0xfff));

	if (adapter->params.rev == 0 || !uses_xaui(adapter))
		val |= F_ENRGMII;

	/* Enable MAC clocks so we can access the registers */
	t3_write_reg(adapter, A_XGM_PORT_CFG, val);
	t3_read_reg(adapter, A_XGM_PORT_CFG);

	val |= F_CLKDIVRESET_;
	t3_write_reg(adapter, A_XGM_PORT_CFG, val);
	t3_read_reg(adapter, A_XGM_PORT_CFG);
	t3_write_reg(adapter, XGM_REG(A_XGM_PORT_CFG, 1), val);
	t3_read_reg(adapter, A_XGM_PORT_CFG);
}

/*
 * Reset the adapter.
 * Older PCIe cards lose their config space during reset, PCI-X
 * ones don't.
 */
int t3_reset_adapter(struct adapter *adapter)
{
	int i, save_and_restore_pcie =
	    adapter->params.rev < T3_REV_B2 && is_pcie(adapter);
	uint16_t devid = 0;

	if (save_and_restore_pcie)
		pci_save_state(adapter->pdev);
	t3_write_reg(adapter, A_PL_RST, F_CRSTWRM | F_CRSTWRMMODE);

	/*
	 * Delay. Give Some time to device to reset fully.
	 * XXX The delay time should be modified.
	 */
	for (i = 0; i < 10; i++) {
		msleep(50);
		pci_read_config_word(adapter->pdev, 0x00, &devid);
		if (devid == 0x1425)
			break;
	}

	if (devid != 0x1425)
		return -1;

	if (save_and_restore_pcie)
		pci_restore_state(adapter->pdev);
	return 0;
}

static int init_parity(struct adapter *adap)
{
	int i, err, addr;

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

	for (err = i = 0; !err && i < 16; i++)
		err = clear_sge_ctxt(adap, i, F_EGRESS);
	for (i = 0xfff0; !err && i <= 0xffff; i++)
		err = clear_sge_ctxt(adap, i, F_EGRESS);
	for (i = 0; !err && i < SGE_QSETS; i++)
		err = clear_sge_ctxt(adap, i, F_RESPONSEQ);
	if (err)
		return err;

	t3_write_reg(adap, A_CIM_IBQ_DBG_DATA, 0);
	for (i = 0; i < 4; i++)
		for (addr = 0; addr <= M_IBQDBGADDR; addr++) {
			t3_write_reg(adap, A_CIM_IBQ_DBG_CFG, F_IBQDBGEN |
				     F_IBQDBGWR | V_IBQDBGQID(i) |
				     V_IBQDBGADDR(addr));
			err = t3_wait_op_done(adap, A_CIM_IBQ_DBG_CFG,
					      F_IBQDBGBUSY, 0, 2, 1);
			if (err)
				return err;
		}
	return 0;
}

/*
 * Initialize adapter SW state for the various HW modules, set initial values
 * for some adapter tunables, take PHYs out of reset, and initialize the MDIO
 * interface.
 */
int t3_prep_adapter(struct adapter *adapter, const struct adapter_info *ai,
		    int reset)
{
	int ret;
	unsigned int i, j = -1;

	get_pci_mode(adapter, &adapter->params.pci);

	adapter->params.info = ai;
	adapter->params.nports = ai->nports0 + ai->nports1;
	adapter->params.chan_map = (!!ai->nports0) | (!!ai->nports1 << 1);
	adapter->params.rev = t3_read_reg(adapter, A_PL_REV);
	/*
	 * We used to only run the "adapter check task" once a second if
	 * we had PHYs which didn't support interrupts (we would check
	 * their link status once a second).  Now we check other conditions
	 * in that routine which could potentially impose a very high
	 * interrupt load on the system.  As such, we now always scan the
	 * adapter state once a second ...
	 */
	adapter->params.linkpoll_period = 10;
	adapter->params.stats_update_period = is_10G(adapter) ?
	    MAC_STATS_ACCUM_SECS : (MAC_STATS_ACCUM_SECS * 10);
	adapter->params.pci.vpd_cap_addr =
	    pci_find_capability(adapter->pdev, PCI_CAP_ID_VPD);
	ret = get_vpd_params(adapter, &adapter->params.vpd);
	if (ret < 0)
		return ret;

	if (reset && t3_reset_adapter(adapter))
		return -1;

	t3_sge_prep(adapter, &adapter->params.sge);

	if (adapter->params.vpd.mclk) {
		struct tp_params *p = &adapter->params.tp;

		mc7_prep(adapter, &adapter->pmrx, MC7_PMRX_BASE_ADDR, "PMRX");
		mc7_prep(adapter, &adapter->pmtx, MC7_PMTX_BASE_ADDR, "PMTX");
		mc7_prep(adapter, &adapter->cm, MC7_CM_BASE_ADDR, "CM");

		p->nchan = adapter->params.chan_map == 3 ? 2 : 1;
		p->pmrx_size = t3_mc7_size(&adapter->pmrx);
		p->pmtx_size = t3_mc7_size(&adapter->pmtx);
		p->cm_size = t3_mc7_size(&adapter->cm);
		p->chan_rx_size = p->pmrx_size / 2;	/* only 1 Rx channel */
		p->chan_tx_size = p->pmtx_size / p->nchan;
		p->rx_pg_size = 64 * 1024;
		p->tx_pg_size = is_10G(adapter) ? 64 * 1024 : 16 * 1024;
		p->rx_num_pgs = pm_num_pages(p->chan_rx_size, p->rx_pg_size);
		p->tx_num_pgs = pm_num_pages(p->chan_tx_size, p->tx_pg_size);
		p->ntimer_qs = p->cm_size >= (128 << 20) ||
		    adapter->params.rev > 0 ? 12 : 6;
	}

	adapter->params.offload = t3_mc7_size(&adapter->pmrx) &&
				  t3_mc7_size(&adapter->pmtx) &&
				  t3_mc7_size(&adapter->cm);

	if (is_offload(adapter)) {
		adapter->params.mc5.nservers = DEFAULT_NSERVERS;
		adapter->params.mc5.nfilters = adapter->params.rev > 0 ?
		    DEFAULT_NFILTERS : 0;
		adapter->params.mc5.nroutes = 0;
		t3_mc5_prep(adapter, &adapter->mc5, MC5_MODE_144_BIT);

		init_mtus(adapter->params.mtus);
		init_cong_ctrl(adapter->params.a_wnd, adapter->params.b_wnd);
	}

	early_hw_init(adapter, ai);
	ret = init_parity(adapter);
	if (ret)
		return ret;

	for_each_port(adapter, i) {
		u8 hw_addr[6];
		const struct port_type_info *pti;
		struct port_info *p = adap2pinfo(adapter, i);

		while (!adapter->params.vpd.port_type[++j])
			;

		pti = &port_types[adapter->params.vpd.port_type[j]];
		if (!pti->phy_prep) {
			CH_ALERT(adapter, "Invalid port type index %d\n",
				 adapter->params.vpd.port_type[j]);
			return -EINVAL;
		}

		p->phy.mdio.dev = adapter->port[i];
		ret = pti->phy_prep(&p->phy, adapter, ai->phy_base_addr + j,
				    ai->mdio_ops);
		if (ret)
			return ret;
		mac_prep(&p->mac, adapter, j);

		/*
		 * The VPD EEPROM stores the base Ethernet address for the
		 * card.  A port's address is derived from the base by adding
		 * the port's index to the base's low octet.
		 */
		memcpy(hw_addr, adapter->params.vpd.eth_base, 5);
		hw_addr[5] = adapter->params.vpd.eth_base[5] + i;

		memcpy(adapter->port[i]->dev_addr, hw_addr,
		       ETH_ALEN);
		init_link_config(&p->link_config, p->phy.caps);
		p->phy.ops->power_down(&p->phy, 1);

		/*
		 * If the PHY doesn't support interrupts for link status
		 * changes, schedule a scan of the adapter links at least
		 * once a second.
		 */
		if (!(p->phy.caps & SUPPORTED_IRQ) &&
		    adapter->params.linkpoll_period > 10)
			adapter->params.linkpoll_period = 10;
	}

	return 0;
}

void t3_led_ready(struct adapter *adapter)
{
	t3_set_reg_field(adapter, A_T3DBG_GPIO_EN, F_GPIO0_OUT_VAL,
			 F_GPIO0_OUT_VAL);
}

int t3_replay_prep_adapter(struct adapter *adapter)
{
	const struct adapter_info *ai = adapter->params.info;
	unsigned int i, j = -1;
	int ret;

	early_hw_init(adapter, ai);
	ret = init_parity(adapter);
	if (ret)
		return ret;

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

		while (!adapter->params.vpd.port_type[++j])
			;

		pti = &port_types[adapter->params.vpd.port_type[j]];
		ret = pti->phy_prep(&p->phy, adapter, p->phy.mdio.prtad, NULL);
		if (ret)
			return ret;
		p->phy.ops->power_down(&p->phy, 1);
	}

	return 0;
}