drivers/net/phy/Kconfig

/*
 * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
 * Copyright(c) 2006 - 2007 Chris Snook <csnook@redhat.com>
 * Copyright(c) 2006 - 2008 Jay Cliburn <jcliburn@gmail.com>
 *
 * Derived from Intel e1000 driver
 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called COPYING.
 *
 * Contact Information:
 * Xiong Huang <xiong_huang@attansic.com>
 * Attansic Technology Corp. 3F 147, Xianzheng 9th Road, Zhubei,
 * Xinzhu  302, TAIWAN, REPUBLIC OF CHINA
 *
 * Chris Snook <csnook@redhat.com>
 * Jay Cliburn <jcliburn@gmail.com>
 *
 * This version is adapted from the Attansic reference driver for
 * inclusion in the Linux kernel.  It is currently under heavy development.
 * A very incomplete list of things that need to be dealt with:
 *
 * TODO:
 * Add more ethtool functions.
 * Fix abstruse irq enable/disable condition described here:
 *	http://marc.theaimsgroup.com/?l=linux-netdev&m=116398508500553&w=2
 *
 * NEEDS TESTING:
 * VLAN
 * multicast
 * promiscuous mode
 * interrupt coalescing
 * SMP torture testing
 */

#include <asm/atomic.h>
#include <asm/byteorder.h>

#include <linux/compiler.h>
#include <linux/crc32.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/etherdevice.h>
#include <linux/hardirq.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/in.h>
#include <linux/interrupt.h>
#include <linux/ip.h>
#include <linux/irqflags.h>
#include <linux/irqreturn.h>
#include <linux/jiffies.h>
#include <linux/mii.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/net.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/pm.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/tcp.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/workqueue.h>

#include <net/checksum.h>

#include "atl1.h"

/* Temporary hack for merging atl1 and atl2 */
#include "atlx.c"

/*
 * This is the only thing that needs to be changed to adjust the
 * maximum number of ports that the driver can manage.
 */
#define ATL1_MAX_NIC 4

#define OPTION_UNSET    -1
#define OPTION_DISABLED 0
#define OPTION_ENABLED  1

#define ATL1_PARAM_INIT { [0 ... ATL1_MAX_NIC] = OPTION_UNSET }

/*
 * Interrupt Moderate Timer in units of 2 us
 *
 * Valid Range: 10-65535
 *
 * Default Value: 100 (200us)
 */
static int __devinitdata int_mod_timer[ATL1_MAX_NIC+1] = ATL1_PARAM_INIT;
static int num_int_mod_timer;
module_param_array_named(int_mod_timer, int_mod_timer, int,
	&num_int_mod_timer, 0);
MODULE_PARM_DESC(int_mod_timer, "Interrupt moderator timer");

#define DEFAULT_INT_MOD_CNT	100	/* 200us */
#define MAX_INT_MOD_CNT		65000
#define MIN_INT_MOD_CNT		50

struct atl1_option {
	enum { enable_option, range_option, list_option } type;
	char *name;
	char *err;
	int def;
	union {
		struct {	/* range_option info */
			int min;
			int max;
		} r;
		struct {	/* list_option info */
			int nr;
			struct atl1_opt_list {
				int i;
				char *str;
			} *p;
		} l;
	} arg;
};

static int __devinit atl1_validate_option(int *value, struct atl1_option *opt,
	struct pci_dev *pdev)
{
	if (*value == OPTION_UNSET) {
		*value = opt->def;
		return 0;
	}

	switch (opt->type) {
	case enable_option:
		switch (*value) {
		case OPTION_ENABLED:
			dev_info(&pdev->dev, "%s enabled\n", opt->name);
			return 0;
		case OPTION_DISABLED:
			dev_info(&pdev->dev, "%s disabled\n", opt->name);
			return 0;
		}
		break;
	case range_option:
		if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
			dev_info(&pdev->dev, "%s set to %i\n", opt->name,
				*value);
			return 0;
		}
		break;
	case list_option:{
			int i;
			struct atl1_opt_list *ent;

			for (i = 0; i < opt->arg.l.nr; i++) {
				ent = &opt->arg.l.p[i];
				if (*value == ent->i) {
					if (ent->str[0] != '\0')
						dev_info(&pdev->dev, "%s\n",
							ent->str);
					return 0;
				}
			}
		}
		break;

	default:
		break;
	}

	dev_info(&pdev->dev, "invalid %s specified (%i) %s\n",
		opt->name, *value, opt->err);
	*value = opt->def;
	return -1;
}

/*
 * atl1_check_options - Range Checking for Command Line Parameters
 * @adapter: board private structure
 *
 * This routine checks all command line parameters for valid user
 * input.  If an invalid value is given, or if no user specified
 * value exists, a default value is used.  The final value is stored
 * in a variable in the adapter structure.
 */
void __devinit atl1_check_options(struct atl1_adapter *adapter)
{
	struct pci_dev *pdev = adapter->pdev;
	int bd = adapter->bd_number;
	if (bd >= ATL1_MAX_NIC) {
		dev_notice(&pdev->dev, "no configuration for board#%i\n", bd);
		dev_notice(&pdev->dev, "using defaults for all values\n");
	}
	{			/* Interrupt Moderate Timer */
		struct atl1_option opt = {
			.type = range_option,
			.name = "Interrupt Moderator Timer",
			.err = "using default of "
				__MODULE_STRING(DEFAULT_INT_MOD_CNT),
			.def = DEFAULT_INT_MOD_CNT,
			.arg = {.r = {.min = MIN_INT_MOD_CNT,
					.max = MAX_INT_MOD_CNT} }
		};
		int val;
		if (num_int_mod_timer > bd) {
			val = int_mod_timer[bd];
			atl1_validate_option(&val, &opt, pdev);
			adapter->imt = (u16) val;
		} else
			adapter->imt = (u16) (opt.def);
	}
}

/*
 * atl1_pci_tbl - PCI Device ID Table
 */
static const struct pci_device_id atl1_pci_tbl[] = {
	{PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1)},
	/* required last entry */
	{0,}
};
MODULE_DEVICE_TABLE(pci, atl1_pci_tbl);

static const u32 atl1_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
	NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;

static int debug = -1;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Message level (0=none,...,16=all)");

/*
 * Reset the transmit and receive units; mask and clear all interrupts.
 * hw - Struct containing variables accessed by shared code
 * return : 0  or  idle status (if error)
 */
static s32 atl1_reset_hw(struct atl1_hw *hw)
{
	struct pci_dev *pdev = hw->back->pdev;
	struct atl1_adapter *adapter = hw->back;
	u32 icr;
	int i;

	/*
	 * Clear Interrupt mask to stop board from generating
	 * interrupts & Clear any pending interrupt events
	 */
	/*
	 * iowrite32(0, hw->hw_addr + REG_IMR);
	 * iowrite32(0xffffffff, hw->hw_addr + REG_ISR);
	 */

	/*
	 * Issue Soft Reset to the MAC.  This will reset the chip's
	 * transmit, receive, DMA.  It will not effect
	 * the current PCI configuration.  The global reset bit is self-
	 * clearing, and should clear within a microsecond.
	 */
	iowrite32(MASTER_CTRL_SOFT_RST, hw->hw_addr + REG_MASTER_CTRL);
	ioread32(hw->hw_addr + REG_MASTER_CTRL);

	iowrite16(1, hw->hw_addr + REG_PHY_ENABLE);
	ioread16(hw->hw_addr + REG_PHY_ENABLE);

	/* delay about 1ms */
	msleep(1);

	/* Wait at least 10ms for All module to be Idle */
	for (i = 0; i < 10; i++) {
		icr = ioread32(hw->hw_addr + REG_IDLE_STATUS);
		if (!icr)
			break;
		/* delay 1 ms */
		msleep(1);
		/* FIXME: still the right way to do this? */
		cpu_relax();
	}

	if (icr) {
		if (netif_msg_hw(adapter))
			dev_dbg(&pdev->dev, "ICR = 0x%x\n", icr);
		return icr;
	}

	return 0;
}

/* function about EEPROM
 *
 * check_eeprom_exist
 * return 0 if eeprom exist
 */
static int atl1_check_eeprom_exist(struct atl1_hw *hw)
{
	u32 value;
	value = ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);
	if (value & SPI_FLASH_CTRL_EN_VPD) {
		value &= ~SPI_FLASH_CTRL_EN_VPD;
		iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);
	}

	value = ioread16(hw->hw_addr + REG_PCIE_CAP_LIST);
	return ((value & 0xFF00) == 0x6C00) ? 0 : 1;
}

static bool atl1_read_eeprom(struct atl1_hw *hw, u32 offset, u32 *p_value)
{
	int i;
	u32 control;

	if (offset & 3)
		/* address do not align */
		return false;

	iowrite32(0, hw->hw_addr + REG_VPD_DATA);
	control = (offset & VPD_CAP_VPD_ADDR_MASK) << VPD_CAP_VPD_ADDR_SHIFT;
	iowrite32(control, hw->hw_addr + REG_VPD_CAP);
	ioread32(hw->hw_addr + REG_VPD_CAP);

	for (i = 0; i < 10; i++) {
		msleep(2);
		control = ioread32(hw->hw_addr + REG_VPD_CAP);
		if (control & VPD_CAP_VPD_FLAG)
			break;
	}
	if (control & VPD_CAP_VPD_FLAG) {
		*p_value = ioread32(hw->hw_addr + REG_VPD_DATA);
		return true;
	}
	/* timeout */
	return false;
}

/*
 * Reads the value from a PHY register
 * hw - Struct containing variables accessed by shared code
 * reg_addr - address of the PHY register to read
 */
s32 atl1_read_phy_reg(struct atl1_hw *hw, u16 reg_addr, u16 *phy_data)
{
	u32 val;
	int i;

	val = ((u32) (reg_addr & MDIO_REG_ADDR_MASK)) << MDIO_REG_ADDR_SHIFT |
		MDIO_START | MDIO_SUP_PREAMBLE | MDIO_RW | MDIO_CLK_25_4 <<
		MDIO_CLK_SEL_SHIFT;
	iowrite32(val, hw->hw_addr + REG_MDIO_CTRL);
	ioread32(hw->hw_addr + REG_MDIO_CTRL);

	for (i = 0; i < MDIO_WAIT_TIMES; i++) {
		udelay(2);
		val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
		if (!(val & (MDIO_START | MDIO_BUSY)))
			break;
	}
	if (!(val & (MDIO_START | MDIO_BUSY))) {
		*phy_data = (u16) val;
		return 0;
	}
	return ATLX_ERR_PHY;
}

#define CUSTOM_SPI_CS_SETUP	2
#define CUSTOM_SPI_CLK_HI	2
#define CUSTOM_SPI_CLK_LO	2
#define CUSTOM_SPI_CS_HOLD	2
#define CUSTOM_SPI_CS_HI	3

static bool atl1_spi_read(struct atl1_hw *hw, u32 addr, u32 *buf)
{
	int i;
	u32 value;

	iowrite32(0, hw->hw_addr + REG_SPI_DATA);
	iowrite32(addr, hw->hw_addr + REG_SPI_ADDR);

	value = SPI_FLASH_CTRL_WAIT_READY |
	    (CUSTOM_SPI_CS_SETUP & SPI_FLASH_CTRL_CS_SETUP_MASK) <<
	    SPI_FLASH_CTRL_CS_SETUP_SHIFT | (CUSTOM_SPI_CLK_HI &
					     SPI_FLASH_CTRL_CLK_HI_MASK) <<
	    SPI_FLASH_CTRL_CLK_HI_SHIFT | (CUSTOM_SPI_CLK_LO &
					   SPI_FLASH_CTRL_CLK_LO_MASK) <<
	    SPI_FLASH_CTRL_CLK_LO_SHIFT | (CUSTOM_SPI_CS_HOLD &
					   SPI_FLASH_CTRL_CS_HOLD_MASK) <<
	    SPI_FLASH_CTRL_CS_HOLD_SHIFT | (CUSTOM_SPI_CS_HI &
					    SPI_FLASH_CTRL_CS_HI_MASK) <<
	    SPI_FLASH_CTRL_CS_HI_SHIFT | (1 & SPI_FLASH_CTRL_INS_MASK) <<
	    SPI_FLASH_CTRL_INS_SHIFT;

	iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);

	value |= SPI_FLASH_CTRL_START;
	iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);
	ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);

	for (i = 0; i < 10; i++) {
		msleep(1);
		value = ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);
		if (!(value & SPI_FLASH_CTRL_START))
			break;
	}

	if (value & SPI_FLASH_CTRL_START)
		return false;

	*buf = ioread32(hw->hw_addr + REG_SPI_DATA);

	return true;
}

/*
 * get_permanent_address
 * return 0 if get valid mac address,
 */
static int atl1_get_permanent_address(struct atl1_hw *hw)
{
	u32 addr[2];
	u32 i, control;
	u16 reg;
	u8 eth_addr[ETH_ALEN];
	bool key_valid;

	if (is_valid_ether_addr(hw->perm_mac_addr))
		return 0;

	/* init */
	addr[0] = addr[1] = 0;

	if (!atl1_check_eeprom_exist(hw)) {
		reg = 0;
		key_valid = false;
		/* Read out all EEPROM content */
		i = 0;
		while (1) {
			if (atl1_read_eeprom(hw, i + 0x100, &control)) {
				if (key_valid) {
					if (reg == REG_MAC_STA_ADDR)
						addr[0] = control;
					else if (reg == (REG_MAC_STA_ADDR + 4))
						addr[1] = control;
					key_valid = false;
				} else if ((control & 0xff) == 0x5A) {
					key_valid = true;
					reg = (u16) (control >> 16);
				} else
					break;
			} else
				/* read error */
				break;
			i += 4;
		}

		*(u32 *) &eth_addr[2] = swab32(addr[0]);
		*(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
		if (is_valid_ether_addr(eth_addr)) {
			memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
			return 0;
		}
		return 1;
	}

	/* see if SPI FLAGS exist ? */
	addr[0] = addr[1] = 0;
	reg = 0;
	key_valid = false;
	i = 0;
	while (1) {
		if (atl1_spi_read(hw, i + 0x1f000, &control)) {
			if (key_valid) {
				if (reg == REG_MAC_STA_ADDR)
					addr[0] = control;
				else if (reg == (REG_MAC_STA_ADDR + 4))
					addr[1] = control;
				key_valid = false;
			} else if ((control & 0xff) == 0x5A) {
				key_valid = true;
				reg = (u16) (control >> 16);
			} else
				/* data end */
				break;
		} else
			/* read error */
			break;
		i += 4;
	}

	*(u32 *) &eth_addr[2] = swab32(addr[0]);
	*(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
	if (is_valid_ether_addr(eth_addr)) {
		memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
		return 0;
	}

	/*
	 * On some motherboards, the MAC address is written by the
	 * BIOS directly to the MAC register during POST, and is
	 * not stored in eeprom.  If all else thus far has failed
	 * to fetch the permanent MAC address, try reading it directly.
	 */
	addr[0] = ioread32(hw->hw_addr + REG_MAC_STA_ADDR);
	addr[1] = ioread16(hw->hw_addr + (REG_MAC_STA_ADDR + 4));
	*(u32 *) &eth_addr[2] = swab32(addr[0]);
	*(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
	if (is_valid_ether_addr(eth_addr)) {
		memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
		return 0;
	}

	return 1;
}

/*
 * Reads the adapter's MAC address from the EEPROM
 * hw - Struct containing variables accessed by shared code
 */
s32 atl1_read_mac_addr(struct atl1_hw *hw)
{
	u16 i;

	if (atl1_get_permanent_address(hw))
		random_ether_addr(hw->perm_mac_addr);

	for (i = 0; i < ETH_ALEN; i++)
		hw->mac_addr[i] = hw->perm_mac_addr[i];
	return 0;
}

/*
 * Hashes an address to determine its location in the multicast table
 * hw - Struct containing variables accessed by shared code
 * mc_addr - the multicast address to hash
 *
 * atl1_hash_mc_addr
 *  purpose
 *      set hash value for a multicast address
 *      hash calcu processing :
 *          1. calcu 32bit CRC for multicast address
 *          2. reverse crc with MSB to LSB
 */
u32 atl1_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr)
{
	u32 crc32, value = 0;
	int i;

	crc32 = ether_crc_le(6, mc_addr);
	for (i = 0; i < 32; i++)
		value |= (((crc32 >> i) & 1) << (31 - i));

	return value;
}

/*
 * Sets the bit in the multicast table corresponding to the hash value.
 * hw - Struct containing variables accessed by shared code
 * hash_value - Multicast address hash value
 */
void atl1_hash_set(struct atl1_hw *hw, u32 hash_value)
{
	u32 hash_bit, hash_reg;
	u32 mta;

	/*
	 * The HASH Table  is a register array of 2 32-bit registers.
	 * It is treated like an array of 64 bits.  We want to set
	 * bit BitArray[hash_value]. So we figure out what register
	 * the bit is in, read it, OR in the new bit, then write
	 * back the new value.  The register is determined by the
	 * upper 7 bits of the hash value and the bit within that
	 * register are determined by the lower 5 bits of the value.
	 */
	hash_reg = (hash_value >> 31) & 0x1;
	hash_bit = (hash_value >> 26) & 0x1F;
	mta = ioread32((hw->hw_addr + REG_RX_HASH_TABLE) + (hash_reg << 2));
	mta |= (1 << hash_bit);
	iowrite32(mta, (hw->hw_addr + REG_RX_HASH_TABLE) + (hash_reg << 2));
}

/*
 * Writes a value to a PHY register
 * hw - Struct containing variables accessed by shared code
 * reg_addr - address of the PHY register to write
 * data - data to write to the PHY
 */
static s32 atl1_write_phy_reg(struct atl1_hw *hw, u32 reg_addr, u16 phy_data)
{
	int i;
	u32 val;

	val = ((u32) (phy_data & MDIO_DATA_MASK)) << MDIO_DATA_SHIFT |
	    (reg_addr & MDIO_REG_ADDR_MASK) << MDIO_REG_ADDR_SHIFT |
	    MDIO_SUP_PREAMBLE |
	    MDIO_START | MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
	iowrite32(val, hw->hw_addr + REG_MDIO_CTRL);
	ioread32(hw->hw_addr + REG_MDIO_CTRL);

	for (i = 0; i < MDIO_WAIT_TIMES; i++) {
		udelay(2);
		val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
		if (!(val & (MDIO_START | MDIO_BUSY)))
			break;
	}

	if (!(val & (MDIO_START | MDIO_BUSY)))
		return 0;

	return ATLX_ERR_PHY;
}

/*
 * Make L001's PHY out of Power Saving State (bug)
 * hw - Struct containing variables accessed by shared code
 * when power on, L001's PHY always on Power saving State
 * (Gigabit Link forbidden)
 */
static s32 atl1_phy_leave_power_saving(struct atl1_hw *hw)
{
	s32 ret;
	ret = atl1_write_phy_reg(hw, 29, 0x0029);
	if (ret)
		return ret;
	return atl1_write_phy_reg(hw, 30, 0);
}

/*
 * Force the PHY into power saving mode using vendor magic.
 */
#ifdef CONFIG_PM
static void atl1_phy_enter_power_saving(struct atl1_hw *hw)
{
	atl1_write_phy_reg(hw, MII_DBG_ADDR, 0);
	atl1_write_phy_reg(hw, MII_DBG_DATA, 0x124E);
	atl1_write_phy_reg(hw, MII_DBG_ADDR, 2);
	atl1_write_phy_reg(hw, MII_DBG_DATA, 0x3000);
	atl1_write_phy_reg(hw, MII_DBG_ADDR, 3);
	atl1_write_phy_reg(hw, MII_DBG_DATA, 0);

}
#endif

/*
 * Resets the PHY and make all config validate
 * hw - Struct containing variables accessed by shared code
 *
 * Sets bit 15 and 12 of the MII Control regiser (for F001 bug)
 */
static s32 atl1_phy_reset(struct atl1_hw *hw)
{
	struct pci_dev *pdev = hw->back->pdev;
	struct atl1_adapter *adapter = hw->back;
	s32 ret_val;
	u16 phy_data;

	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
	    hw->media_type == MEDIA_TYPE_1000M_FULL)
		phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN;
	else {
		switch (hw->media_type) {
		case MEDIA_TYPE_100M_FULL:
			phy_data =
			    MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
			    MII_CR_RESET;
			break;
		case MEDIA_TYPE_100M_HALF:
			phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
			break;
		case MEDIA_TYPE_10M_FULL:
			phy_data =
			    MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
			break;
		default:
			/* MEDIA_TYPE_10M_HALF: */
			phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
			break;
		}
	}

	ret_val = atl1_write_phy_reg(hw, MII_BMCR, phy_data);
	if (ret_val) {
		u32 val;
		int i;
		/* pcie serdes link may be down! */
		if (netif_msg_hw(adapter))
			dev_dbg(&pdev->dev, "pcie phy link down\n");

		for (i = 0; i < 25; i++) {
			msleep(1);
			val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
			if (!(val & (MDIO_START | MDIO_BUSY)))
				break;
		}

		if ((val & (MDIO_START | MDIO_BUSY)) != 0) {
			if (netif_msg_hw(adapter))
				dev_warn(&pdev->dev,
					"pcie link down at least 25ms\n");
			return ret_val;
		}
	}
	return 0;
}

/*
 * Configures PHY autoneg and flow control advertisement settings
 * hw - Struct containing variables accessed by shared code
 */
static s32 atl1_phy_setup_autoneg_adv(struct atl1_hw *hw)
{
	s32 ret_val;
	s16 mii_autoneg_adv_reg;
	s16 mii_1000t_ctrl_reg;

	/* Read the MII Auto-Neg Advertisement Register (Address 4). */
	mii_autoneg_adv_reg = MII_AR_DEFAULT_CAP_MASK;

	/* Read the MII 1000Base-T Control Register (Address 9). */
	mii_1000t_ctrl_reg = MII_ATLX_CR_1000T_DEFAULT_CAP_MASK;

	/*
	 * First we clear all the 10/100 mb speed bits in the Auto-Neg
	 * Advertisement Register (Address 4) and the 1000 mb speed bits in
	 * the  1000Base-T Control Register (Address 9).
	 */
	mii_autoneg_adv_reg &= ~MII_AR_SPEED_MASK;
	mii_1000t_ctrl_reg &= ~MII_ATLX_CR_1000T_SPEED_MASK;

	/*
	 * Need to parse media_type  and set up
	 * the appropriate PHY registers.
	 */
	switch (hw->media_type) {
	case MEDIA_TYPE_AUTO_SENSOR:
		mii_autoneg_adv_reg |= (MII_AR_10T_HD_CAPS |
					MII_AR_10T_FD_CAPS |
					MII_AR_100TX_HD_CAPS |
					MII_AR_100TX_FD_CAPS);
		mii_1000t_ctrl_reg |= MII_ATLX_CR_1000T_FD_CAPS;
		break;

	case MEDIA_TYPE_1000M_FULL:
		mii_1000t_ctrl_reg |= MII_ATLX_CR_1000T_FD_CAPS;
		break;

	case MEDIA_TYPE_100M_FULL:
		mii_autoneg_adv_reg |= MII_AR_100TX_FD_CAPS;
		break;

	case MEDIA_TYPE_100M_HALF:
		mii_autoneg_adv_reg |= MII_AR_100TX_HD_CAPS;
		break;

	case MEDIA_TYPE_10M_FULL:
		mii_autoneg_adv_reg |= MII_AR_10T_FD_CAPS;
		break;

	default:
		mii_autoneg_adv_reg |= MII_AR_10T_HD_CAPS;
		break;
	}

	/* flow control fixed to enable all */
	mii_autoneg_adv_reg |= (MII_AR_ASM_DIR | MII_AR_PAUSE);

	hw->mii_autoneg_adv_reg = mii_autoneg_adv_reg;
	hw->mii_1000t_ctrl_reg = mii_1000t_ctrl_reg;

	ret_val = atl1_write_phy_reg(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
	if (ret_val)
		return ret_val;

	ret_val = atl1_write_phy_reg(hw, MII_ATLX_CR, mii_1000t_ctrl_reg);
	if (ret_val)
		return ret_val;

	return 0;
}

/*
 * Configures link settings.
 * hw - Struct containing variables accessed by shared code
 * Assumes the hardware has previously been reset and the
 * transmitter and receiver are not enabled.
 */
static s32 atl1_setup_link(struct atl1_hw *hw)
{
	struct pci_dev *pdev = hw->back->pdev;
	struct atl1_adapter *adapter = hw->back;
	s32 ret_val;

	/*
	 * Options:
	 *  PHY will advertise value(s) parsed from
	 *  autoneg_advertised and fc
	 *  no matter what autoneg is , We will not wait link result.
	 */
	ret_val = atl1_phy_setup_autoneg_adv(hw);
	if (ret_val) {
		if (netif_msg_link(adapter))
			dev_dbg(&pdev->dev,
				"error setting up autonegotiation\n");
		return ret_val;
	}
	/* SW.Reset , En-Auto-Neg if needed */
	ret_val = atl1_phy_reset(hw);
	if (ret_val) {
		if (netif_msg_link(adapter))
			dev_dbg(&pdev->dev, "error resetting phy\n");
		return ret_val;
	}
	hw->phy_configured = true;
	return ret_val;
}

static void atl1_init_flash_opcode(struct atl1_hw *hw)
{
	if (hw->flash_vendor >= ARRAY_SIZE(flash_table))
		/* Atmel */
		hw->flash_vendor = 0;

	/* Init OP table */
	iowrite8(flash_table[hw->flash_vendor].cmd_program,
		hw->hw_addr + REG_SPI_FLASH_OP_PROGRAM);
	iowrite8(flash_table[hw->flash_vendor].cmd_sector_erase,
		hw->hw_addr + REG_SPI_FLASH_OP_SC_ERASE);
	iowrite8(flash_table[hw->flash_vendor].cmd_chip_erase,
		hw->hw_addr + REG_SPI_FLASH_OP_CHIP_ERASE);
	iowrite8(flash_table[hw->flash_vendor].cmd_rdid,
		hw->hw_addr + REG_SPI_FLASH_OP_RDID);
	iowrite8(flash_table[hw->flash_vendor].cmd_wren,
		hw->hw_addr + REG_SPI_FLASH_OP_WREN);
	iowrite8(flash_table[hw->flash_vendor].cmd_rdsr,
		hw->hw_addr + REG_SPI_FLASH_OP_RDSR);
	iowrite8(flash_table[hw->flash_vendor].cmd_wrsr,
		hw->hw_addr + REG_SPI_FLASH_OP_WRSR);
	iowrite8(flash_table[hw->flash_vendor].cmd_read,
		hw->hw_addr + REG_SPI_FLASH_OP_READ);
}

/*
 * Performs basic configuration of the adapter.
 * hw - Struct containing variables accessed by shared code
 * Assumes that the controller has previously been reset and is in a
 * post-reset uninitialized state. Initializes multicast table,
 * and  Calls routines to setup link
 * Leaves the transmit and receive units disabled and uninitialized.
 */
static s32 atl1_init_hw(struct atl1_hw *hw)
{
	u32 ret_val = 0;

	/* Zero out the Multicast HASH table */
	iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
	/* clear the old settings from the multicast hash table */
	iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));

	atl1_init_flash_opcode(hw);

	if (!hw->phy_configured) {
		/* enable GPHY LinkChange Interrrupt */
		ret_val = atl1_write_phy_reg(hw, 18, 0xC00);
		if (ret_val)
			return ret_val;
		/* make PHY out of power-saving state */
		ret_val = atl1_phy_leave_power_saving(hw);
		if (ret_val)
			return ret_val;
		/* Call a subroutine to configure the link */
		ret_val = atl1_setup_link(hw);
	}
	return ret_val;
}

/*
 * Detects the current speed and duplex settings of the hardware.
 * hw - Struct containing variables accessed by shared code
 * speed - Speed of the connection
 * duplex - Duplex setting of the connection
 */
static s32 atl1_get_speed_and_duplex(struct atl1_hw *hw, u16 *speed, u16 *duplex)
{
	struct pci_dev *pdev = hw->back->pdev;
	struct atl1_adapter *adapter = hw->back;
	s32 ret_val;
	u16 phy_data;

	/* ; --- Read   PHY Specific Status Register (17) */
	ret_val = atl1_read_phy_reg(hw, MII_ATLX_PSSR, &phy_data);
	if (ret_val)
		return ret_val;

	if (!(phy_data & MII_ATLX_PSSR_SPD_DPLX_RESOLVED))
		return ATLX_ERR_PHY_RES;

	switch (phy_data & MII_ATLX_PSSR_SPEED) {
	case MII_ATLX_PSSR_1000MBS:
		*speed = SPEED_1000;
		break;
	case MII_ATLX_PSSR_100MBS:
		*speed = SPEED_100;
		break;
	case MII_ATLX_PSSR_10MBS:
		*speed = SPEED_10;
		break;
	default:
		if (netif_msg_hw(adapter))
			dev_dbg(&pdev->dev, "error getting speed\n");
		return ATLX_ERR_PHY_SPEED;
		break;
	}
	if (phy_data & MII_ATLX_PSSR_DPLX)
		*duplex = FULL_DUPLEX;
	else
		*duplex = HALF_DUPLEX;

	return 0;
}

void atl1_set_mac_addr(struct atl1_hw *hw)
{
	u32 value;
	/*
	 * 00-0B-6A-F6-00-DC
	 * 0:  6AF600DC   1: 000B
	 * low dword
	 */
	value = (((u32) hw->mac_addr[2]) << 24) |
	    (((u32) hw->mac_addr[3]) << 16) |
	    (((u32) hw->mac_addr[4]) << 8) | (((u32) hw->mac_addr[5]));
	iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
	/* high dword */
	value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
	iowrite32(value, (hw->hw_addr + REG_MAC_STA_ADDR) + (1 << 2));
}

/*
 * atl1_sw_init - Initialize general software structures (struct atl1_adapter)
 * @adapter: board private structure to initialize
 *
 * atl1_sw_init initializes the Adapter private data structure.
 * Fields are initialized based on PCI device information and
 * OS network device settings (MTU size).
 */
static int __devinit atl1_sw_init(struct atl1_adapter *adapter)
{
	struct atl1_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;

	hw->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
	hw->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;

	adapter->wol = 0;
	adapter->rx_buffer_len = (hw->max_frame_size + 7) & ~7;
	adapter->ict = 50000;		/* 100ms */
	adapter->link_speed = SPEED_0;	/* hardware init */
	adapter->link_duplex = FULL_DUPLEX;

	hw->phy_configured = false;
	hw->preamble_len = 7;
	hw->ipgt = 0x60;
	hw->min_ifg = 0x50;
	hw->ipgr1 = 0x40;
	hw->ipgr2 = 0x60;
	hw->max_retry = 0xf;
	hw->lcol = 0x37;
	hw->jam_ipg = 7;
	hw->rfd_burst = 8;
	hw->rrd_burst = 8;
	hw->rfd_fetch_gap = 1;
	hw->rx_jumbo_th = adapter->rx_buffer_len / 8;
	hw->rx_jumbo_lkah = 1;
	hw->rrd_ret_timer = 16;
	hw->tpd_burst = 4;
	hw->tpd_fetch_th = 16;
	hw->txf_burst = 0x100;
	hw->tx_jumbo_task_th = (hw->max_frame_size + 7) >> 3;
	hw->tpd_fetch_gap = 1;
	hw->rcb_value = atl1_rcb_64;
	hw->dma_ord = atl1_dma_ord_enh;
	hw->dmar_block = atl1_dma_req_256;
	hw->dmaw_block = atl1_dma_req_256;
	hw->cmb_rrd = 4;
	hw->cmb_tpd = 4;
	hw->cmb_rx_timer = 1;	/* about 2us */
	hw->cmb_tx_timer = 1;	/* about 2us */
	hw->smb_timer = 100000;	/* about 200ms */

	spin_lock_init(&adapter->lock);
	spin_lock_init(&adapter->mb_lock);

	return 0;
}

static int mdio_read(struct net_device *netdev, int phy_id, int reg_num)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	u16 result;

	atl1_read_phy_reg(&adapter->hw, reg_num & 0x1f, &result);

	return result;
}

static void mdio_write(struct net_device *netdev, int phy_id, int reg_num,
	int val)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);

	atl1_write_phy_reg(&adapter->hw, reg_num, val);
}

/*
 * atl1_mii_ioctl -
 * @netdev:
 * @ifreq:
 * @cmd:
 */
static int atl1_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	unsigned long flags;
	int retval;

	if (!netif_running(netdev))
		return -EINVAL;

	spin_lock_irqsave(&adapter->lock, flags);
	retval = generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
	spin_unlock_irqrestore(&adapter->lock, flags);

	return retval;
}

/*
 * atl1_setup_mem_resources - allocate Tx / RX descriptor resources
 * @adapter: board private structure
 *
 * Return 0 on success, negative on failure
 */
static s32 atl1_setup_ring_resources(struct atl1_adapter *adapter)
{
	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
	struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
	struct atl1_ring_header *ring_header = &adapter->ring_header;
	struct pci_dev *pdev = adapter->pdev;
	int size;
	u8 offset = 0;

	size = sizeof(struct atl1_buffer) * (tpd_ring->count + rfd_ring->count);
	tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
	if (unlikely(!tpd_ring->buffer_info)) {
		if (netif_msg_drv(adapter))
			dev_err(&pdev->dev, "kzalloc failed , size = D%d\n",
				size);
		goto err_nomem;
	}
	rfd_ring->buffer_info =
		(struct atl1_buffer *)(tpd_ring->buffer_info + tpd_ring->count);

	/*
	 * real ring DMA buffer
	 * each ring/block may need up to 8 bytes for alignment, hence the
	 * additional 40 bytes tacked onto the end.
	 */
	ring_header->size = size =
		sizeof(struct tx_packet_desc) * tpd_ring->count
		+ sizeof(struct rx_free_desc) * rfd_ring->count
		+ sizeof(struct rx_return_desc) * rrd_ring->count
		+ sizeof(struct coals_msg_block)
		+ sizeof(struct stats_msg_block)
		+ 40;

	ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
		&ring_header->dma);
	if (unlikely(!ring_header->desc)) {
		if (netif_msg_drv(adapter))
			dev_err(&pdev->dev, "pci_alloc_consistent failed\n");
		goto err_nomem;
	}

	memset(ring_header->desc, 0, ring_header->size);

	/* init TPD ring */
	tpd_ring->dma = ring_header->dma;
	offset = (tpd_ring->dma & 0x7) ? (8 - (ring_header->dma & 0x7)) : 0;
	tpd_ring->dma += offset;
	tpd_ring->desc = (u8 *) ring_header->desc + offset;
	tpd_ring->size = sizeof(struct tx_packet_desc) * tpd_ring->count;

	/* init RFD ring */
	rfd_ring->dma = tpd_ring->dma + tpd_ring->size;
	offset = (rfd_ring->dma & 0x7) ? (8 - (rfd_ring->dma & 0x7)) : 0;
	rfd_ring->dma += offset;
	rfd_ring->desc = (u8 *) tpd_ring->desc + (tpd_ring->size + offset);
	rfd_ring->size = sizeof(struct rx_free_desc) * rfd_ring->count;


	/* init RRD ring */
	rrd_ring->dma = rfd_ring->dma + rfd_ring->size;
	offset = (rrd_ring->dma & 0x7) ? (8 - (rrd_ring->dma & 0x7)) : 0;
	rrd_ring->dma += offset;
	rrd_ring->desc = (u8 *) rfd_ring->desc + (rfd_ring->size + offset);
	rrd_ring->size = sizeof(struct rx_return_desc) * rrd_ring->count;


	/* init CMB */
	adapter->cmb.dma = rrd_ring->dma + rrd_ring->size;
	offset = (adapter->cmb.dma & 0x7) ? (8 - (adapter->cmb.dma & 0x7)) : 0;
	adapter->cmb.dma += offset;
	adapter->cmb.cmb = (struct coals_msg_block *)
		((u8 *) rrd_ring->desc + (rrd_ring->size + offset));

	/* init SMB */
	adapter->smb.dma = adapter->cmb.dma + sizeof(struct coals_msg_block);
	offset = (adapter->smb.dma & 0x7) ? (8 - (adapter->smb.dma & 0x7)) : 0;
	adapter->smb.dma += offset;
	adapter->smb.smb = (struct stats_msg_block *)
		((u8 *) adapter->cmb.cmb +
		(sizeof(struct coals_msg_block) + offset));

	return 0;

err_nomem:
	kfree(tpd_ring->buffer_info);
	return -ENOMEM;
}

static void atl1_init_ring_ptrs(struct atl1_adapter *adapter)
{
	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
	struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;

	atomic_set(&tpd_ring->next_to_use, 0);
	atomic_set(&tpd_ring->next_to_clean, 0);

	rfd_ring->next_to_clean = 0;
	atomic_set(&rfd_ring->next_to_use, 0);

	rrd_ring->next_to_use = 0;
	atomic_set(&rrd_ring->next_to_clean, 0);
}

/*
 * atl1_clean_rx_ring - Free RFD Buffers
 * @adapter: board private structure
 */
static void atl1_clean_rx_ring(struct atl1_adapter *adapter)
{
	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
	struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
	struct atl1_buffer *buffer_info;
	struct pci_dev *pdev = adapter->pdev;
	unsigned long size;
	unsigned int i;

	/* Free all the Rx ring sk_buffs */
	for (i = 0; i < rfd_ring->count; i++) {
		buffer_info = &rfd_ring->buffer_info[i];
		if (buffer_info->dma) {
			pci_unmap_page(pdev, buffer_info->dma,
				buffer_info->length, PCI_DMA_FROMDEVICE);
			buffer_info->dma = 0;
		}
		if (buffer_info->skb) {
			dev_kfree_skb(buffer_info->skb);
			buffer_info->skb = NULL;
		}
	}

	size = sizeof(struct atl1_buffer) * rfd_ring->count;
	memset(rfd_ring->buffer_info, 0, size);

	/* Zero out the descriptor ring */
	memset(rfd_ring->desc, 0, rfd_ring->size);

	rfd_ring->next_to_clean = 0;
	atomic_set(&rfd_ring->next_to_use, 0);

	rrd_ring->next_to_use = 0;
	atomic_set(&rrd_ring->next_to_clean, 0);
}

/*
 * atl1_clean_tx_ring - Free Tx Buffers
 * @adapter: board private structure
 */
static void atl1_clean_tx_ring(struct atl1_adapter *adapter)
{
	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
	struct atl1_buffer *buffer_info;
	struct pci_dev *pdev = adapter->pdev;
	unsigned long size;
	unsigned int i;

	/* Free all the Tx ring sk_buffs */
	for (i = 0; i < tpd_ring->count; i++) {
		buffer_info = &tpd_ring->buffer_info[i];
		if (buffer_info->dma) {
			pci_unmap_page(pdev, buffer_info->dma,
				buffer_info->length, PCI_DMA_TODEVICE);
			buffer_info->dma = 0;
		}
	}

	for (i = 0; i < tpd_ring->count; i++) {
		buffer_info = &tpd_ring->buffer_info[i];
		if (buffer_info->skb) {
			dev_kfree_skb_any(buffer_info->skb);
			buffer_info->skb = NULL;
		}
	}

	size = sizeof(struct atl1_buffer) * tpd_ring->count;
	memset(tpd_ring->buffer_info, 0, size);

	/* Zero out the descriptor ring */
	memset(tpd_ring->desc, 0, tpd_ring->size);

	atomic_set(&tpd_ring->next_to_use, 0);
	atomic_set(&tpd_ring->next_to_clean, 0);
}

/*
 * atl1_free_ring_resources - Free Tx / RX descriptor Resources
 * @adapter: board private structure
 *
 * Free all transmit software resources
 */
static void atl1_free_ring_resources(struct atl1_adapter *adapter)
{
	struct pci_dev *pdev = adapter->pdev;
	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
	struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
	struct atl1_ring_header *ring_header = &adapter->ring_header;

	atl1_clean_tx_ring(adapter);
	atl1_clean_rx_ring(adapter);

	kfree(tpd_ring->buffer_info);
	pci_free_consistent(pdev, ring_header->size, ring_header->desc,
		ring_header->dma);

	tpd_ring->buffer_info = NULL;
	tpd_ring->desc = NULL;
	tpd_ring->dma = 0;

	rfd_ring->buffer_info = NULL;
	rfd_ring->desc = NULL;
	rfd_ring->dma = 0;

	rrd_ring->desc = NULL;
	rrd_ring->dma = 0;
}

static void atl1_setup_mac_ctrl(struct atl1_adapter *adapter)
{
	u32 value;
	struct atl1_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;
	/* Config MAC CTRL Register */
	value = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
	/* duplex */
	if (FULL_DUPLEX == adapter->link_duplex)
		value |= MAC_CTRL_DUPLX;
	/* speed */
	value |= ((u32) ((SPEED_1000 == adapter->link_speed) ?
			 MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
		  MAC_CTRL_SPEED_SHIFT);
	/* flow control */
	value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
	/* PAD & CRC */
	value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
	/* preamble length */
	value |= (((u32) adapter->hw.preamble_len
		   & MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
	/* vlan */
	if (adapter->vlgrp)
		value |= MAC_CTRL_RMV_VLAN;
	/* rx checksum
	   if (adapter->rx_csum)
	   value |= MAC_CTRL_RX_CHKSUM_EN;
	 */
	/* filter mode */
	value |= MAC_CTRL_BC_EN;
	if (netdev->flags & IFF_PROMISC)
		value |= MAC_CTRL_PROMIS_EN;
	else if (netdev->flags & IFF_ALLMULTI)
		value |= MAC_CTRL_MC_ALL_EN;
	/* value |= MAC_CTRL_LOOPBACK; */
	iowrite32(value, hw->hw_addr + REG_MAC_CTRL);
}

static u32 atl1_check_link(struct atl1_adapter *adapter)
{
	struct atl1_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;
	u32 ret_val;
	u16 speed, duplex, phy_data;
	int reconfig = 0;

	/* MII_BMSR must read twice */
	atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
	atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
	if (!(phy_data & BMSR_LSTATUS)) {
		/* link down */
		if (netif_carrier_ok(netdev)) {
			/* old link state: Up */
			if (netif_msg_link(adapter))
				dev_info(&adapter->pdev->dev, "link is down\n");
			adapter->link_speed = SPEED_0;
			netif_carrier_off(netdev);
			netif_stop_queue(netdev);
		}
		return 0;
	}

	/* Link Up */
	ret_val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
	if (ret_val)
		return ret_val;

	switch (hw->media_type) {
	case MEDIA_TYPE_1000M_FULL:
		if (speed != SPEED_1000 || duplex != FULL_DUPLEX)
			reconfig = 1;
		break;
	case MEDIA_TYPE_100M_FULL:
		if (speed != SPEED_100 || duplex != FULL_DUPLEX)
			reconfig = 1;
		break;
	case MEDIA_TYPE_100M_HALF:
		if (speed != SPEED_100 || duplex != HALF_DUPLEX)
			reconfig = 1;
		break;
	case MEDIA_TYPE_10M_FULL:
		if (speed != SPEED_10 || duplex != FULL_DUPLEX)
			reconfig = 1;
		break;
	case MEDIA_TYPE_10M_HALF:
		if (speed != SPEED_10 || duplex != HALF_DUPLEX)
			reconfig = 1;
		break;
	}

	/* link result is our setting */
	if (!reconfig) {
		if (adapter->link_speed != speed
		    || adapter->link_duplex != duplex) {
			adapter->link_speed = speed;
			adapter->link_duplex = duplex;
			atl1_setup_mac_ctrl(adapter);
			if (netif_msg_link(adapter))
				dev_info(&adapter->pdev->dev,
					"%s link is up %d Mbps %s\n",
					netdev->name, adapter->link_speed,
					adapter->link_duplex == FULL_DUPLEX ?
					"full duplex" : "half duplex");
		}
		if (!netif_carrier_ok(netdev)) {
			/* Link down -> Up */
			netif_carrier_on(netdev);
			netif_wake_queue(netdev);
		}
		return 0;
	}

	/* change original link status */
	if (netif_carrier_ok(netdev)) {
		adapter->link_speed = SPEED_0;
		netif_carrier_off(netdev);
		netif_stop_queue(netdev);
	}

	if (hw->media_type != MEDIA_TYPE_AUTO_SENSOR &&
	    hw->media_type != MEDIA_TYPE_1000M_FULL) {
		switch (hw->media_type) {
		case MEDIA_TYPE_100M_FULL:
			phy_data = MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
			           MII_CR_RESET;
			break;
		case MEDIA_TYPE_100M_HALF:
			phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
			break;
		case MEDIA_TYPE_10M_FULL:
			phy_data =
			    MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
			break;
		default:
			/* MEDIA_TYPE_10M_HALF: */
			phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
			break;
		}
		atl1_write_phy_reg(hw, MII_BMCR, phy_data);
		return 0;
	}

	/* auto-neg, insert timer to re-config phy */
	if (!adapter->phy_timer_pending) {
		adapter->phy_timer_pending = true;
		mod_timer(&adapter->phy_config_timer, jiffies + 3 * HZ);
	}

	return 0;
}

static void set_flow_ctrl_old(struct atl1_adapter *adapter)
{
	u32 hi, lo, value;

	/* RFD Flow Control */
	value = adapter->rfd_ring.count;
	hi = value / 16;
	if (hi < 2)
		hi = 2;
	lo = value * 7 / 8;

	value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
		((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
	iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RXF_PAUSE_THRESH);

	/* RRD Flow Control */
	value = adapter->rrd_ring.count;
	lo = value / 16;
	hi = value * 7 / 8;
	if (lo < 2)
		lo = 2;
	value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
		((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
	iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
}

static void set_flow_ctrl_new(struct atl1_hw *hw)
{
	u32 hi, lo, value;

	/* RXF Flow Control */
	value = ioread32(hw->hw_addr + REG_SRAM_RXF_LEN);
	lo = value / 16;
	if (lo < 192)
		lo = 192;
	hi = value * 7 / 8;
	if (hi < lo)
		hi = lo + 16;
	value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
		((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
	iowrite32(value, hw->hw_addr + REG_RXQ_RXF_PAUSE_THRESH);

	/* RRD Flow Control */
	value = ioread32(hw->hw_addr + REG_SRAM_RRD_LEN);
	lo = value / 8;
	hi = value * 7 / 8;
	if (lo < 2)
		lo = 2;
	if (hi < lo)
		hi = lo + 3;
	value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
		((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
	iowrite32(value, hw->hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
}

/*
 * atl1_configure - Configure Transmit&Receive Unit after Reset
 * @adapter: board private structure
 *
 * Configure the Tx /Rx unit of the MAC after a reset.
 */
static u32 atl1_configure(struct atl1_adapter *adapter)
{
	struct atl1_hw *hw = &adapter->hw;
	u32 value;

	/* clear interrupt status */
	iowrite32(0xffffffff, adapter->hw.hw_addr + REG_ISR);

	/* set MAC Address */
	value = (((u32) hw->mac_addr[2]) << 24) |
		(((u32) hw->mac_addr[3]) << 16) |
		(((u32) hw->mac_addr[4]) << 8) |
		(((u32) hw->mac_addr[5]));
	iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
	value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
	iowrite32(value, hw->hw_addr + (REG_MAC_STA_ADDR + 4));

	/* tx / rx ring */

	/* HI base address */
	iowrite32((u32) ((adapter->tpd_ring.dma & 0xffffffff00000000ULL) >> 32),
		hw->hw_addr + REG_DESC_BASE_ADDR_HI);
	/* LO base address */
	iowrite32((u32) (adapter->rfd_ring.dma & 0x00000000ffffffffULL),
		hw->hw_addr + REG_DESC_RFD_ADDR_LO);
	iowrite32((u32) (adapter->rrd_ring.dma & 0x00000000ffffffffULL),
		hw->hw_addr + REG_DESC_RRD_ADDR_LO);
	iowrite32((u32) (adapter->tpd_ring.dma & 0x00000000ffffffffULL),
		hw->hw_addr + REG_DESC_TPD_ADDR_LO);
	iowrite32((u32) (adapter->cmb.dma & 0x00000000ffffffffULL),
		hw->hw_addr + REG_DESC_CMB_ADDR_LO);
	iowrite32((u32) (adapter->smb.dma & 0x00000000ffffffffULL),
		hw->hw_addr + REG_DESC_SMB_ADDR_LO);

	/* element count */
	value = adapter->rrd_ring.count;
	value <<= 16;
	value += adapter->rfd_ring.count;
	iowrite32(value, hw->hw_addr + REG_DESC_RFD_RRD_RING_SIZE);
	iowrite32(adapter->tpd_ring.count, hw->hw_addr +
		REG_DESC_TPD_RING_SIZE);

	/* Load Ptr */
	iowrite32(1, hw->hw_addr + REG_LOAD_PTR);

	/* config Mailbox */
	value = ((atomic_read(&adapter->tpd_ring.next_to_use)
		  & MB_TPD_PROD_INDX_MASK) << MB_TPD_PROD_INDX_SHIFT) |
		((atomic_read(&adapter->rrd_ring.next_to_clean)
		& MB_RRD_CONS_INDX_MASK) << MB_RRD_CONS_INDX_SHIFT) |
		((atomic_read(&adapter->rfd_ring.next_to_use)
		& MB_RFD_PROD_INDX_MASK) << MB_RFD_PROD_INDX_SHIFT);
	iowrite32(value, hw->hw_addr + REG_MAILBOX);

	/* config IPG/IFG */
	value = (((u32) hw->ipgt & MAC_IPG_IFG_IPGT_MASK)
		 << MAC_IPG_IFG_IPGT_SHIFT) |
		(((u32) hw->min_ifg & MAC_IPG_IFG_MIFG_MASK)
		<< MAC_IPG_IFG_MIFG_SHIFT) |
		(((u32) hw->ipgr1 & MAC_IPG_IFG_IPGR1_MASK)
		<< MAC_IPG_IFG_IPGR1_SHIFT) |
		(((u32) hw->ipgr2 & MAC_IPG_IFG_IPGR2_MASK)
		<< MAC_IPG_IFG_IPGR2_SHIFT);
	iowrite32(value, hw->hw_addr + REG_MAC_IPG_IFG);

	/* config  Half-Duplex Control */
	value = ((u32) hw->lcol & MAC_HALF_DUPLX_CTRL_LCOL_MASK) |
		(((u32) hw->max_retry & MAC_HALF_DUPLX_CTRL_RETRY_MASK)
		<< MAC_HALF_DUPLX_CTRL_RETRY_SHIFT) |
		MAC_HALF_DUPLX_CTRL_EXC_DEF_EN |
		(0xa << MAC_HALF_DUPLX_CTRL_ABEBT_SHIFT) |
		(((u32) hw->jam_ipg & MAC_HALF_DUPLX_CTRL_JAMIPG_MASK)
		<< MAC_HALF_DUPLX_CTRL_JAMIPG_SHIFT);
	iowrite32(value, hw->hw_addr + REG_MAC_HALF_DUPLX_CTRL);

	/* set Interrupt Moderator Timer */
	iowrite16(adapter->imt, hw->hw_addr + REG_IRQ_MODU_TIMER_INIT);
	iowrite32(MASTER_CTRL_ITIMER_EN, hw->hw_addr + REG_MASTER_CTRL);

	/* set Interrupt Clear Timer */
	iowrite16(adapter->ict, hw->hw_addr + REG_CMBDISDMA_TIMER);

	/* set max frame size hw will accept */
	iowrite32(hw->max_frame_size, hw->hw_addr + REG_MTU);

	/* jumbo size & rrd retirement timer */
	value = (((u32) hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK)
		 << RXQ_JMBOSZ_TH_SHIFT) |
		(((u32) hw->rx_jumbo_lkah & RXQ_JMBO_LKAH_MASK)
		<< RXQ_JMBO_LKAH_SHIFT) |
		(((u32) hw->rrd_ret_timer & RXQ_RRD_TIMER_MASK)
		<< RXQ_RRD_TIMER_SHIFT);
	iowrite32(value, hw->hw_addr + REG_RXQ_JMBOSZ_RRDTIM);

	/* Flow Control */
	switch (hw->dev_rev) {
	case 0x8001:
	case 0x9001:
	case 0x9002:
	case 0x9003:
		set_flow_ctrl_old(adapter);
		break;
	default:
		set_flow_ctrl_new(hw);
		break;
	}

	/* config TXQ */
	value = (((u32) hw->tpd_burst & TXQ_CTRL_TPD_BURST_NUM_MASK)
		 << TXQ_CTRL_TPD_BURST_NUM_SHIFT) |
		(((u32) hw->txf_burst & TXQ_CTRL_TXF_BURST_NUM_MASK)
		<< TXQ_CTRL_TXF_BURST_NUM_SHIFT) |
		(((u32) hw->tpd_fetch_th & TXQ_CTRL_TPD_FETCH_TH_MASK)
		<< TXQ_CTRL_TPD_FETCH_TH_SHIFT) | TXQ_CTRL_ENH_MODE |
		TXQ_CTRL_EN;
	iowrite32(value, hw->hw_addr + REG_TXQ_CTRL);

	/* min tpd fetch gap & tx jumbo packet size threshold for taskoffload */
	value = (((u32) hw->tx_jumbo_task_th & TX_JUMBO_TASK_TH_MASK)
		<< TX_JUMBO_TASK_TH_SHIFT) |
		(((u32) hw->tpd_fetch_gap & TX_TPD_MIN_IPG_MASK)
		<< TX_TPD_MIN_IPG_SHIFT);
	iowrite32(value, hw->hw_addr + REG_TX_JUMBO_TASK_TH_TPD_IPG);

	/* config RXQ */
	value = (((u32) hw->rfd_burst & RXQ_CTRL_RFD_BURST_NUM_MASK)
		<< RXQ_CTRL_RFD_BURST_NUM_SHIFT) |
		(((u32) hw->rrd_burst & RXQ_CTRL_RRD_BURST_THRESH_MASK)
		<< RXQ_CTRL_RRD_BURST_THRESH_SHIFT) |
		(((u32) hw->rfd_fetch_gap & RXQ_CTRL_RFD_PREF_MIN_IPG_MASK)
		<< RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT) | RXQ_CTRL_CUT_THRU_EN |
		RXQ_CTRL_EN;
	iowrite32(value, hw->hw_addr + REG_RXQ_CTRL);

	/* config DMA Engine */
	value = ((((u32) hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
		<< DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
		((((u32) hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
		<< DMA_CTRL_DMAW_BURST_LEN_SHIFT) | DMA_CTRL_DMAR_EN |
		DMA_CTRL_DMAW_EN;
	value |= (u32) hw->dma_ord;
	if (atl1_rcb_128 == hw->rcb_value)
		value |= DMA_CTRL_RCB_VALUE;
	iowrite32(value, hw->hw_addr + REG_DMA_CTRL);

	/* config CMB / SMB */
	value = (hw->cmb_tpd > adapter->tpd_ring.count) ?
		hw->cmb_tpd : adapter->tpd_ring.count;
	value <<= 16;
	value |= hw->cmb_rrd;
	iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TH);
	value = hw->cmb_rx_timer | ((u32) hw->cmb_tx_timer << 16);
	iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TIMER);
	iowrite32(hw->smb_timer, hw->hw_addr + REG_SMB_TIMER);

	/* --- enable CMB / SMB */
	value = CSMB_CTRL_CMB_EN | CSMB_CTRL_SMB_EN;
	iowrite32(value, hw->hw_addr + REG_CSMB_CTRL);

	value = ioread32(adapter->hw.hw_addr + REG_ISR);
	if (unlikely((value & ISR_PHY_LINKDOWN) != 0))
		value = 1;	/* config failed */
	else
		value = 0;

	/* clear all interrupt status */
	iowrite32(0x3fffffff, adapter->hw.hw_addr + REG_ISR);
	iowrite32(0, adapter->hw.hw_addr + REG_ISR);
	return value;
}

/*
 * atl1_pcie_patch - Patch for PCIE module
 */
static void atl1_pcie_patch(struct atl1_adapter *adapter)
{
	u32 value;

	/* much vendor magic here */
	value = 0x6500;
	iowrite32(value, adapter->hw.hw_addr + 0x12FC);
	/* pcie flow control mode change */
	value = ioread32(adapter->hw.hw_addr + 0x1008);
	value |= 0x8000;
	iowrite32(value, adapter->hw.hw_addr + 0x1008);
}

/*
 * When ACPI resume on some VIA MotherBoard, the Interrupt Disable bit/0x400
 * on PCI Command register is disable.
 * The function enable this bit.
 * Brackett, 2006/03/15
 */
static void atl1_via_workaround(struct atl1_adapter *adapter)
{
	unsigned long value;

	value = ioread16(adapter->hw.hw_addr + PCI_COMMAND);
	if (value & PCI_COMMAND_INTX_DISABLE)
		value &= ~PCI_COMMAND_INTX_DISABLE;
	iowrite32(value, adapter->hw.hw_addr + PCI_COMMAND);
}

static void atl1_inc_smb(struct atl1_adapter *adapter)
{
	struct stats_msg_block *smb = adapter->smb.smb;

	/* Fill out the OS statistics structure */
	adapter->soft_stats.rx_packets += smb->rx_ok;
	adapter->soft_stats.tx_packets += smb->tx_ok;
	adapter->soft_stats.rx_bytes += smb->rx_byte_cnt;
	adapter->soft_stats.tx_bytes += smb->tx_byte_cnt;
	adapter->soft_stats.multicast += smb->rx_mcast;
	adapter->soft_stats.collisions += (smb->tx_1_col + smb->tx_2_col * 2 +
		smb->tx_late_col + smb->tx_abort_col * adapter->hw.max_retry);

	/* Rx Errors */
	adapter->soft_stats.rx_errors += (smb->rx_frag + smb->rx_fcs_err +
		smb->rx_len_err + smb->rx_sz_ov + smb->rx_rxf_ov +
		smb->rx_rrd_ov + smb->rx_align_err);
	adapter->soft_stats.rx_fifo_errors += smb->rx_rxf_ov;
	adapter->soft_stats.rx_length_errors += smb->rx_len_err;
	adapter->soft_stats.rx_crc_errors += smb->rx_fcs_err;
	adapter->soft_stats.rx_frame_errors += smb->rx_align_err;
	adapter->soft_stats.rx_missed_errors += (smb->rx_rrd_ov +
		smb->rx_rxf_ov);

	adapter->soft_stats.rx_pause += smb->rx_pause;
	adapter->soft_stats.rx_rrd_ov += smb->rx_rrd_ov;
	adapter->soft_stats.rx_trunc += smb->rx_sz_ov;

	/* Tx Errors */
	adapter->soft_stats.tx_errors += (smb->tx_late_col +
		smb->tx_abort_col + smb->tx_underrun + smb->tx_trunc);
	adapter->soft_stats.tx_fifo_errors += smb->tx_underrun;
	adapter->soft_stats.tx_aborted_errors += smb->tx_abort_col;
	adapter->soft_stats.tx_window_errors += smb->tx_late_col;

	adapter->soft_stats.excecol += smb->tx_abort_col;
	adapter->soft_stats.deffer += smb->tx_defer;
	adapter->soft_stats.scc += smb->tx_1_col;
	adapter->soft_stats.mcc += smb->tx_2_col;
	adapter->soft_stats.latecol += smb->tx_late_col;
	adapter->soft_stats.tx_underun += smb->tx_underrun;
	adapter->soft_stats.tx_trunc += smb->tx_trunc;
	adapter->soft_stats.tx_pause += smb->tx_pause;

	adapter->net_stats.rx_packets = adapter->soft_stats.rx_packets;
	adapter->net_stats.tx_packets = adapter->soft_stats.tx_packets;
	adapter->net_stats.rx_bytes = adapter->soft_stats.rx_bytes;
	adapter->net_stats.tx_bytes = adapter->soft_stats.tx_bytes;
	adapter->net_stats.multicast = adapter->soft_stats.multicast;
	adapter->net_stats.collisions = adapter->soft_stats.collisions;
	adapter->net_stats.rx_errors = adapter->soft_stats.rx_errors;
	adapter->net_stats.rx_over_errors =
		adapter->soft_stats.rx_missed_errors;
	adapter->net_stats.rx_length_errors =
		adapter->soft_stats.rx_length_errors;
	adapter->net_stats.rx_crc_errors = adapter->soft_stats.rx_crc_errors;
	adapter->net_stats.rx_frame_errors =
		adapter->soft_stats.rx_frame_errors;
	adapter->net_stats.rx_fifo_errors = adapter->soft_stats.rx_fifo_errors;
	adapter->net_stats.rx_missed_errors =
		adapter->soft_stats.rx_missed_errors;
	adapter->net_stats.tx_errors = adapter->soft_stats.tx_errors;
	adapter->net_stats.tx_fifo_errors = adapter->soft_stats.tx_fifo_errors;
	adapter->net_stats.tx_aborted_errors =
		adapter->soft_stats.tx_aborted_errors;
	adapter->net_stats.tx_window_errors =
		adapter->soft_stats.tx_window_errors;
	adapter->net_stats.tx_carrier_errors =
		adapter->soft_stats.tx_carrier_errors;
}

static void atl1_update_mailbox(struct atl1_adapter *adapter)
{
	unsigned long flags;
	u32 tpd_next_to_use;
	u32 rfd_next_to_use;
	u32 rrd_next_to_clean;
	u32 value;

	spin_lock_irqsave(&adapter->mb_lock, flags);

	tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
	rfd_next_to_use = atomic_read(&adapter->rfd_ring.next_to_use);
	rrd_next_to_clean = atomic_read(&adapter->rrd_ring.next_to_clean);

	value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
		MB_RFD_PROD_INDX_SHIFT) |
		((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
		MB_RRD_CONS_INDX_SHIFT) |
		((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
		MB_TPD_PROD_INDX_SHIFT);
	iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);

	spin_unlock_irqrestore(&adapter->mb_lock, flags);
}

static void atl1_clean_alloc_flag(struct atl1_adapter *adapter,
	struct rx_return_desc *rrd, u16 offset)
{
	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;

	while (rfd_ring->next_to_clean != (rrd->buf_indx + offset)) {
		rfd_ring->buffer_info[rfd_ring->next_to_clean].alloced = 0;
		if (++rfd_ring->next_to_clean == rfd_ring->count) {
			rfd_ring->next_to_clean = 0;
		}
	}
}

static void atl1_update_rfd_index(struct atl1_adapter *adapter,
	struct rx_return_desc *rrd)
{
	u16 num_buf;

	num_buf = (rrd->xsz.xsum_sz.pkt_size + adapter->rx_buffer_len - 1) /
		adapter->rx_buffer_len;
	if (rrd->num_buf == num_buf)
		/* clean alloc flag for bad rrd */
		atl1_clean_alloc_flag(adapter, rrd, num_buf);
}

static void atl1_rx_checksum(struct atl1_adapter *adapter,
	struct rx_return_desc *rrd, struct sk_buff *skb)
{
	struct pci_dev *pdev = adapter->pdev;

	skb->ip_summed = CHECKSUM_NONE;

	if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
		if (rrd->err_flg & (ERR_FLAG_CRC | ERR_FLAG_TRUNC |
					ERR_FLAG_CODE | ERR_FLAG_OV)) {
			adapter->hw_csum_err++;
			if (netif_msg_rx_err(adapter))
				dev_printk(KERN_DEBUG, &pdev->dev,
					"rx checksum error\n");
			return;
		}
	}

	/* not IPv4 */
	if (!(rrd->pkt_flg & PACKET_FLAG_IPV4))
		/* checksum is invalid, but it's not an IPv4 pkt, so ok */
		return;

	/* IPv4 packet */
	if (likely(!(rrd->err_flg &
		(ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM)))) {
		skb->ip_summed = CHECKSUM_UNNECESSARY;
		adapter->hw_csum_good++;
		return;
	}

	/* IPv4, but hardware thinks its checksum is wrong */
	if (netif_msg_rx_err(adapter))
		dev_printk(KERN_DEBUG, &pdev->dev,
			"hw csum wrong, pkt_flag:%x, err_flag:%x\n",
			rrd->pkt_flg, rrd->err_flg);
	skb->ip_summed = CHECKSUM_COMPLETE;
	skb->csum = htons(rrd->xsz.xsum_sz.rx_chksum);
	adapter->hw_csum_err++;
	return;
}

/*
 * atl1_alloc_rx_buffers - Replace used receive buffers
 * @adapter: address of board private structure
 */
static u16 atl1_alloc_rx_buffers(struct atl1_adapter *adapter)
{
	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
	struct pci_dev *pdev = adapter->pdev;
	struct page *page;
	unsigned long offset;
	struct atl1_buffer *buffer_info, *next_info;
	struct sk_buff *skb;
	u16 num_alloc = 0;
	u16 rfd_next_to_use, next_next;
	struct rx_free_desc *rfd_desc;

	next_next = rfd_next_to_use = atomic_read(&rfd_ring->next_to_use);
	if (++next_next == rfd_ring->count)
		next_next = 0;
	buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
	next_info = &rfd_ring->buffer_info[next_next];

	while (!buffer_info->alloced && !next_info->alloced) {
		if (buffer_info->skb) {
			buffer_info->alloced = 1;
			goto next;
		}

		rfd_desc = ATL1_RFD_DESC(rfd_ring, rfd_next_to_use);

		skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
		if (unlikely(!skb)) {
			/* Better luck next round */
			adapter->net_stats.rx_dropped++;
			break;
		}

		/*
		 * Make buffer alignment 2 beyond a 16 byte boundary
		 * this will result in a 16 byte aligned IP header after
		 * the 14 byte MAC header is removed
		 */
		skb_reserve(skb, NET_IP_ALIGN);

		buffer_info->alloced = 1;
		buffer_info->skb = skb;
		buffer_info->length = (u16) adapter->rx_buffer_len;
		page = virt_to_page(skb->data);
		offset = (unsigned long)skb->data & ~PAGE_MASK;
		buffer_info->dma = pci_map_page(pdev, page, offset,
						adapter->rx_buffer_len,
						PCI_DMA_FROMDEVICE);
		rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
		rfd_desc->buf_len = cpu_to_le16(adapter->rx_buffer_len);
		rfd_desc->coalese = 0;

next:
		rfd_next_to_use = next_next;
		if (unlikely(++next_next == rfd_ring->count))
			next_next = 0;

		buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
		next_info = &rfd_ring->buffer_info[next_next];
		num_alloc++;
	}

	if (num_alloc) {
		/*
		 * Force memory writes to complete before letting h/w
		 * know there are new descriptors to fetch.  (Only
		 * applicable for weak-ordered memory model archs,
		 * such as IA-64).
		 */
		wmb();
		atomic_set(&rfd_ring->next_to_use, (int)rfd_next_to_use);
	}
	return num_alloc;
}

static void atl1_intr_rx(struct atl1_adapter *adapter)
{
	int i, count;
	u16 length;
	u16 rrd_next_to_clean;
	u32 value;
	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
	struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
	struct atl1_buffer *buffer_info;
	struct rx_return_desc *rrd;
	struct sk_buff *skb;

	count = 0;

	rrd_next_to_clean = atomic_read(&rrd_ring->next_to_clean);

	while (1) {
		rrd = ATL1_RRD_DESC(rrd_ring, rrd_next_to_clean);
		i = 1;
		if (likely(rrd->xsz.valid)) {	/* packet valid */
chk_rrd:
			/* check rrd status */
			if (likely(rrd->num_buf == 1))
				goto rrd_ok;
			else if (netif_msg_rx_err(adapter)) {
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"unexpected RRD buffer count\n");
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"rx_buf_len = %d\n",
					adapter->rx_buffer_len);
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"RRD num_buf = %d\n",
					rrd->num_buf);
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"RRD pkt_len = %d\n",
					rrd->xsz.xsum_sz.pkt_size);
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"RRD pkt_flg = 0x%08X\n",
					rrd->pkt_flg);
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"RRD err_flg = 0x%08X\n",
					rrd->err_flg);
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"RRD vlan_tag = 0x%08X\n",
					rrd->vlan_tag);
			}

			/* rrd seems to be bad */
			if (unlikely(i-- > 0)) {
				/* rrd may not be DMAed completely */
				udelay(1);
				goto chk_rrd;
			}
			/* bad rrd */
			if (netif_msg_rx_err(adapter))
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"bad RRD\n");
			/* see if update RFD index */
			if (rrd->num_buf > 1)
				atl1_update_rfd_index(adapter, rrd);

			/* update rrd */
			rrd->xsz.valid = 0;
			if (++rrd_next_to_clean == rrd_ring->count)
				rrd_next_to_clean = 0;
			count++;
			continue;
		} else {	/* current rrd still not be updated */

			break;
		}
rrd_ok:
		/* clean alloc flag for bad rrd */
		atl1_clean_alloc_flag(adapter, rrd, 0);

		buffer_info = &rfd_ring->buffer_info[rrd->buf_indx];
		if (++rfd_ring->next_to_clean == rfd_ring->count)
			rfd_ring->next_to_clean = 0;

		/* update rrd next to clean */
		if (++rrd_next_to_clean == rrd_ring->count)
			rrd_next_to_clean = 0;
		count++;

		if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
			if (!(rrd->err_flg &
				(ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM
				| ERR_FLAG_LEN))) {
				/* packet error, don't need upstream */
				buffer_info->alloced = 0;
				rrd->xsz.valid = 0;
				continue;
			}
		}

		/* Good Receive */
		pci_unmap_page(adapter->pdev, buffer_info->dma,
			       buffer_info->length, PCI_DMA_FROMDEVICE);
		skb = buffer_info->skb;
		length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);

		skb_put(skb, length - ETH_FCS_LEN);

		/* Receive Checksum Offload */
		atl1_rx_checksum(adapter, rrd, skb);
		skb->protocol = eth_type_trans(skb, adapter->netdev);

		if (adapter->vlgrp && (rrd->pkt_flg & PACKET_FLAG_VLAN_INS)) {
			u16 vlan_tag = (rrd->vlan_tag >> 4) |
					((rrd->vlan_tag & 7) << 13) |
					((rrd->vlan_tag & 8) << 9);
			vlan_hwaccel_rx(skb, adapter->vlgrp, vlan_tag);
		} else
			netif_rx(skb);

		/* let protocol layer free skb */
		buffer_info->skb = NULL;
		buffer_info->alloced = 0;
		rrd->xsz.valid = 0;

		adapter->netdev->last_rx = jiffies;
	}

	atomic_set(&rrd_ring->next_to_clean, rrd_next_to_clean);

	atl1_alloc_rx_buffers(adapter);

	/* update mailbox ? */
	if (count) {
		u32 tpd_next_to_use;
		u32 rfd_next_to_use;

		spin_lock(&adapter->mb_lock);

		tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
		rfd_next_to_use =
		    atomic_read(&adapter->rfd_ring.next_to_use);
		rrd_next_to_clean =
		    atomic_read(&adapter->rrd_ring.next_to_clean);
		value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
			MB_RFD_PROD_INDX_SHIFT) |
                        ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
			MB_RRD_CONS_INDX_SHIFT) |
                        ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
			MB_TPD_PROD_INDX_SHIFT);
		iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
		spin_unlock(&adapter->mb_lock);
	}
}

static void atl1_intr_tx(struct atl1_adapter *adapter)
{
	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
	struct atl1_buffer *buffer_info;
	u16 sw_tpd_next_to_clean;
	u16 cmb_tpd_next_to_clean;

	sw_tpd_next_to_clean = atomic_read(&tpd_ring->next_to_clean);
	cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx);

	while (cmb_tpd_next_to_clean != sw_tpd_next_to_clean) {
		struct tx_packet_desc *tpd;

		tpd = ATL1_TPD_DESC(tpd_ring, sw_tpd_next_to_clean);
		buffer_info = &tpd_ring->buffer_info[sw_tpd_next_to_clean];
		if (buffer_info->dma) {
			pci_unmap_page(adapter->pdev, buffer_info->dma,
				       buffer_info->length, PCI_DMA_TODEVICE);
			buffer_info->dma = 0;
		}

		if (buffer_info->skb) {
			dev_kfree_skb_irq(buffer_info->skb);
			buffer_info->skb = NULL;
		}

		if (++sw_tpd_next_to_clean == tpd_ring->count)
			sw_tpd_next_to_clean = 0;
	}
	atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean);

	if (netif_queue_stopped(adapter->netdev)
	    && netif_carrier_ok(adapter->netdev))
		netif_wake_queue(adapter->netdev);
}

static u16 atl1_tpd_avail(struct atl1_tpd_ring *tpd_ring)
{
	u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
	u16 next_to_use = atomic_read(&tpd_ring->next_to_use);
	return ((next_to_clean > next_to_use) ?
		next_to_clean - next_to_use - 1 :
		tpd_ring->count + next_to_clean - next_to_use - 1);
}

static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
	struct tx_packet_desc *ptpd)
{
	/* spinlock held */
	u8 hdr_len, ip_off;
	u32 real_len;
	int err;

	if (skb_shinfo(skb)->gso_size) {
		if (skb_header_cloned(skb)) {
			err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
			if (unlikely(err))
				return -1;
		}

		if (skb->protocol == ntohs(ETH_P_IP)) {
			struct iphdr *iph = ip_hdr(skb);

			real_len = (((unsigned char *)iph - skb->data) +
				ntohs(iph->tot_len));
			if (real_len < skb->len)
				pskb_trim(skb, real_len);
			hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
			if (skb->len == hdr_len) {
				iph->check = 0;
				tcp_hdr(skb)->check =
					~csum_tcpudp_magic(iph->saddr,
					iph->daddr, tcp_hdrlen(skb),
					IPPROTO_TCP, 0);
				ptpd->word3 |= (iph->ihl & TPD_IPHL_MASK) <<
					TPD_IPHL_SHIFT;
				ptpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
					TPD_TCPHDRLEN_MASK) <<
					TPD_TCPHDRLEN_SHIFT;
				ptpd->word3 |= 1 << TPD_IP_CSUM_SHIFT;
				ptpd->word3 |= 1 << TPD_TCP_CSUM_SHIFT;
				return 1;
			}

			iph->check = 0;
			tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
					iph->daddr, 0, IPPROTO_TCP, 0);
			ip_off = (unsigned char *)iph -
				(unsigned char *) skb_network_header(skb);
			if (ip_off == 8) /* 802.3-SNAP frame */
				ptpd->word3 |= 1 << TPD_ETHTYPE_SHIFT;
			else if (ip_off != 0)
				return -2;

			ptpd->word3 |= (iph->ihl & TPD_IPHL_MASK) <<
				TPD_IPHL_SHIFT;
			ptpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
				TPD_TCPHDRLEN_MASK) << TPD_TCPHDRLEN_SHIFT;
			ptpd->word3 |= (skb_shinfo(skb)->gso_size &
				TPD_MSS_MASK) << TPD_MSS_SHIFT;
			ptpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
			return 3;
		}
	}
	return false;
}

static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
	struct tx_packet_desc *ptpd)
{
	u8 css, cso;

	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
		css = (u8) (skb->csum_start - skb_headroom(skb));
		cso = css + (u8) skb->csum_offset;
		if (unlikely(css & 0x1)) {
			/* L1 hardware requires an even number here */
			if (netif_msg_tx_err(adapter))
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"payload offset not an even number\n");
			return -1;
		}
		ptpd->word3 |= (css & TPD_PLOADOFFSET_MASK) <<
			TPD_PLOADOFFSET_SHIFT;
		ptpd->word3 |= (cso & TPD_CCSUMOFFSET_MASK) <<
			TPD_CCSUMOFFSET_SHIFT;
		ptpd->word3 |= 1 << TPD_CUST_CSUM_EN_SHIFT;
		return true;
	}
	return 0;
}

static void atl1_tx_map(struct atl1_adapter *adapter, struct sk_buff *skb,
	struct tx_packet_desc *ptpd)
{
	/* spinlock held */
	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
	struct atl1_buffer *buffer_info;
	u16 buf_len = skb->len;
	struct page *page;
	unsigned long offset;
	unsigned int nr_frags;
	unsigned int f;
	int retval;
	u16 next_to_use;
	u16 data_len;
	u8 hdr_len;

	buf_len -= skb->data_len;
	nr_frags = skb_shinfo(skb)->nr_frags;
	next_to_use = atomic_read(&tpd_ring->next_to_use);
	buffer_info = &tpd_ring->buffer_info[next_to_use];
	if (unlikely(buffer_info->skb))
		BUG();
	/* put skb in last TPD */
	buffer_info->skb = NULL;

	retval = (ptpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
	if (retval) {
		/* TSO */
		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
		buffer_info->length = hdr_len;
		page = virt_to_page(skb->data);
		offset = (unsigned long)skb->data & ~PAGE_MASK;
		buffer_info->dma = pci_map_page(adapter->pdev, page,
						offset, hdr_len,
						PCI_DMA_TODEVICE);

		if (++next_to_use == tpd_ring->count)
			next_to_use = 0;

		if (buf_len > hdr_len) {
			int i, nseg;

			data_len = buf_len - hdr_len;
			nseg = (data_len + ATL1_MAX_TX_BUF_LEN - 1) /
				ATL1_MAX_TX_BUF_LEN;
			for (i = 0; i < nseg; i++) {
				buffer_info =
				    &tpd_ring->buffer_info[next_to_use];
				buffer_info->skb = NULL;
				buffer_info->length =
				    (ATL1_MAX_TX_BUF_LEN >=
				     data_len) ? ATL1_MAX_TX_BUF_LEN : data_len;
				data_len -= buffer_info->length;
				page = virt_to_page(skb->data +
					(hdr_len + i * ATL1_MAX_TX_BUF_LEN));
				offset = (unsigned long)(skb->data +
					(hdr_len + i * ATL1_MAX_TX_BUF_LEN)) &
					~PAGE_MASK;
				buffer_info->dma = pci_map_page(adapter->pdev,
					page, offset, buffer_info->length,
					PCI_DMA_TODEVICE);
				if (++next_to_use == tpd_ring->count)
					next_to_use = 0;
			}
		}
	} else {
		/* not TSO */
		buffer_info->length = buf_len;
		page = virt_to_page(skb->data);
		offset = (unsigned long)skb->data & ~PAGE_MASK;
		buffer_info->dma = pci_map_page(adapter->pdev, page,
			offset, buf_len, PCI_DMA_TODEVICE);
		if (++next_to_use == tpd_ring->count)
			next_to_use = 0;
	}

	for (f = 0; f < nr_frags; f++) {
		struct skb_frag_struct *frag;
		u16 i, nseg;

		frag = &skb_shinfo(skb)->frags[f];
		buf_len = frag->size;

		nseg = (buf_len + ATL1_MAX_TX_BUF_LEN - 1) /
			ATL1_MAX_TX_BUF_LEN;
		for (i = 0; i < nseg; i++) {
			buffer_info = &tpd_ring->buffer_info[next_to_use];
			if (unlikely(buffer_info->skb))
				BUG();
			buffer_info->skb = NULL;
			buffer_info->length = (buf_len > ATL1_MAX_TX_BUF_LEN) ?
				ATL1_MAX_TX_BUF_LEN : buf_len;
			buf_len -= buffer_info->length;
			buffer_info->dma = pci_map_page(adapter->pdev,
				frag->page,
				frag->page_offset + (i * ATL1_MAX_TX_BUF_LEN),
				buffer_info->length, PCI_DMA_TODEVICE);

			if (++next_to_use == tpd_ring->count)
				next_to_use = 0;
		}
	}

	/* last tpd's buffer-info */
	buffer_info->skb = skb;
}

static void atl1_tx_queue(struct atl1_adapter *adapter, u16 count,
       struct tx_packet_desc *ptpd)
{
	/* spinlock held */
	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
	struct atl1_buffer *buffer_info;
	struct tx_packet_desc *tpd;
	u16 j;
	u32 val;
	u16 next_to_use = (u16) atomic_read(&tpd_ring->next_to_use);

	for (j = 0; j < count; j++) {
		buffer_info = &tpd_ring->buffer_info[next_to_use];
		tpd = ATL1_TPD_DESC(&adapter->tpd_ring, next_to_use);
		if (tpd != ptpd)
			memcpy(tpd, ptpd, sizeof(struct tx_packet_desc));
		tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
		tpd->word2 = (cpu_to_le16(buffer_info->length) &
			TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT;

		/*
		 * if this is the first packet in a TSO chain, set
		 * TPD_HDRFLAG, otherwise, clear it.
		 */
		val = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) &
			TPD_SEGMENT_EN_MASK;
		if (val) {
			if (!j)
				tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
			else
				tpd->word3 &= ~(1 << TPD_HDRFLAG_SHIFT);
		}

		if (j == (count - 1))
			tpd->word3 |= 1 << TPD_EOP_SHIFT;

		if (++next_to_use == tpd_ring->count)
			next_to_use = 0;
	}
	/*
	 * Force memory writes to complete before letting h/w
	 * know there are new descriptors to fetch.  (Only
	 * applicable for weak-ordered memory model archs,
	 * such as IA-64).
	 */
	wmb();

	atomic_set(&tpd_ring->next_to_use, next_to_use);
}

static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
	int len = skb->len;
	int tso;
	int count = 1;
	int ret_val;
	struct tx_packet_desc *ptpd;
	u16 frag_size;
	u16 vlan_tag;
	unsigned long flags;
	unsigned int nr_frags = 0;
	unsigned int mss = 0;
	unsigned int f;
	unsigned int proto_hdr_len;

	len -= skb->data_len;

	if (unlikely(skb->len <= 0)) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	nr_frags = skb_shinfo(skb)->nr_frags;
	for (f = 0; f < nr_frags; f++) {
		frag_size = skb_shinfo(skb)->frags[f].size;
		if (frag_size)
			count += (frag_size + ATL1_MAX_TX_BUF_LEN - 1) /
				ATL1_MAX_TX_BUF_LEN;
	}

	mss = skb_shinfo(skb)->gso_size;
	if (mss) {
		if (skb->protocol == ntohs(ETH_P_IP)) {
			proto_hdr_len = (skb_transport_offset(skb) +
					 tcp_hdrlen(skb));
			if (unlikely(proto_hdr_len > len)) {
				dev_kfree_skb_any(skb);
				return NETDEV_TX_OK;
			}
			/* need additional TPD ? */
			if (proto_hdr_len != len)
				count += (len - proto_hdr_len +
					ATL1_MAX_TX_BUF_LEN - 1) /
					ATL1_MAX_TX_BUF_LEN;
		}
	}

	if (!spin_trylock_irqsave(&adapter->lock, flags)) {
		/* Can't get lock - tell upper layer to requeue */
		if (netif_msg_tx_queued(adapter))
			dev_printk(KERN_DEBUG, &adapter->pdev->dev,
				"tx locked\n");
		return NETDEV_TX_LOCKED;
	}

	if (atl1_tpd_avail(&adapter->tpd_ring) < count) {
		/* not enough descriptors */
		netif_stop_queue(netdev);
		spin_unlock_irqrestore(&adapter->lock, flags);
		if (netif_msg_tx_queued(adapter))
			dev_printk(KERN_DEBUG, &adapter->pdev->dev,
				"tx busy\n");
		return NETDEV_TX_BUSY;
	}

	ptpd = ATL1_TPD_DESC(tpd_ring,
		(u16) atomic_read(&tpd_ring->next_to_use));
	memset(ptpd, 0, sizeof(struct tx_packet_desc));

	if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
		vlan_tag = vlan_tx_tag_get(skb);
		vlan_tag = (vlan_tag << 4) | (vlan_tag >> 13) |
			((vlan_tag >> 9) & 0x8);
		ptpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
		ptpd->word3 |= (vlan_tag & TPD_VL_TAGGED_MASK) <<
			TPD_VL_TAGGED_SHIFT;
	}

	tso = atl1_tso(adapter, skb, ptpd);
	if (tso < 0) {
		spin_unlock_irqrestore(&adapter->lock, flags);
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	if (!tso) {
		ret_val = atl1_tx_csum(adapter, skb, ptpd);
		if (ret_val < 0) {
			spin_unlock_irqrestore(&adapter->lock, flags);
			dev_kfree_skb_any(skb);
			return NETDEV_TX_OK;
		}
	}

	atl1_tx_map(adapter, skb, ptpd);
	atl1_tx_queue(adapter, count, ptpd);
	atl1_update_mailbox(adapter);
	spin_unlock_irqrestore(&adapter->lock, flags);
	netdev->trans_start = jiffies;
	return NETDEV_TX_OK;
}

/*
 * atl1_intr - Interrupt Handler
 * @irq: interrupt number
 * @data: pointer to a network interface device structure
 * @pt_regs: CPU registers structure
 */
static irqreturn_t atl1_intr(int irq, void *data)
{
	struct atl1_adapter *adapter = netdev_priv(data);
	u32 status;
	int max_ints = 10;

	status = adapter->cmb.cmb->int_stats;
	if (!status)
		return IRQ_NONE;

	do {
		/* clear CMB interrupt status at once */
		adapter->cmb.cmb->int_stats = 0;

		if (status & ISR_GPHY)	/* clear phy status */
			atlx_clear_phy_int(adapter);

		/* clear ISR status, and Enable CMB DMA/Disable Interrupt */
		iowrite32(status | ISR_DIS_INT, adapter->hw.hw_addr + REG_ISR);

		/* check if SMB intr */
		if (status & ISR_SMB)
			atl1_inc_smb(adapter);

		/* check if PCIE PHY Link down */
		if (status & ISR_PHY_LINKDOWN) {
			if (netif_msg_intr(adapter))
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"pcie phy link down %x\n", status);
			if (netif_running(adapter->netdev)) {	/* reset MAC */
				iowrite32(0, adapter->hw.hw_addr + REG_IMR);
				schedule_work(&adapter->pcie_dma_to_rst_task);
				return IRQ_HANDLED;
			}
		}

		/* check if DMA read/write error ? */
		if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
			if (netif_msg_intr(adapter))
				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
					"pcie DMA r/w error (status = 0x%x)\n",
					status);
			iowrite32(0, adapter->hw.hw_addr + REG_IMR);
			schedule_work(&adapter->pcie_dma_to_rst_task);
			return IRQ_HANDLED;
		}

		/* link event */
		if (status & ISR_GPHY) {
			adapter->soft_stats.tx_carrier_errors++;
			atl1_check_for_link(adapter);
		}

		/* transmit event */
		if (status & ISR_CMB_TX)
			atl1_intr_tx(adapter);

		/* rx exception */
		if (unlikely(status & (ISR_RXF_OV | ISR_RFD_UNRUN |
			ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
			ISR_HOST_RRD_OV | ISR_CMB_RX))) {
			if (status & (ISR_RXF_OV | ISR_RFD_UNRUN |
				ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
				ISR_HOST_RRD_OV))
				if (netif_msg_intr(adapter))
					dev_printk(KERN_DEBUG,
						&adapter->pdev->dev,
						"rx exception, ISR = 0x%x\n",
						status);
			atl1_intr_rx(adapter);
		}

		if (--max_ints < 0)
			break;

	} while ((status = adapter->cmb.cmb->int_stats));

	/* re-enable Interrupt */
	iowrite32(ISR_DIS_SMB | ISR_DIS_DMA, adapter->hw.hw_addr + REG_ISR);
	return IRQ_HANDLED;
}

/*
 * atl1_watchdog - Timer Call-back
 * @data: pointer to netdev cast into an unsigned long
 */
static void atl1_watchdog(unsigned long data)
{
	struct atl1_adapter *adapter = (struct atl1_adapter *)data;

	/* Reset the timer */
	mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
}

/*
 * atl1_phy_config - Timer Call-back
 * @data: pointer to netdev cast into an unsigned long
 */
static void atl1_phy_config(unsigned long data)
{
	struct atl1_adapter *adapter = (struct atl1_adapter *)data;
	struct atl1_hw *hw = &adapter->hw;
	unsigned long flags;

	spin_lock_irqsave(&adapter->lock, flags);
	adapter->phy_timer_pending = false;
	atl1_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
	atl1_write_phy_reg(hw, MII_ATLX_CR, hw->mii_1000t_ctrl_reg);
	atl1_write_phy_reg(hw, MII_BMCR, MII_CR_RESET | MII_CR_AUTO_NEG_EN);
	spin_unlock_irqrestore(&adapter->lock, flags);
}

/*
 * Orphaned vendor comment left intact here:
 * <vendor comment>
 * If TPD Buffer size equal to 0, PCIE DMAR_TO_INT
 * will assert. We do soft reset <0x1400=1> according
 * with the SPEC. BUT, it seemes that PCIE or DMA
 * state-machine will not be reset. DMAR_TO_INT will
 * assert again and again.
 * </vendor comment>
 */

static int atl1_reset(struct atl1_adapter *adapter)
{
	int ret;
	ret = atl1_reset_hw(&adapter->hw);
	if (ret)
		return ret;
	return atl1_init_hw(&adapter->hw);
}

static s32 atl1_up(struct atl1_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int err;
	int irq_flags = IRQF_SAMPLE_RANDOM;

	/* hardware has been reset, we need to reload some things */
	atlx_set_multi(netdev);
	atl1_init_ring_ptrs(adapter);
	atlx_restore_vlan(adapter);
	err = atl1_alloc_rx_buffers(adapter);
	if (unlikely(!err))
		/* no RX BUFFER allocated */
		return -ENOMEM;

	if (unlikely(atl1_configure(adapter))) {
		err = -EIO;
		goto err_up;
	}

	err = pci_enable_msi(adapter->pdev);
	if (err) {
		if (netif_msg_ifup(adapter))
			dev_info(&adapter->pdev->dev,
				"Unable to enable MSI: %d\n", err);
		irq_flags |= IRQF_SHARED;
	}

	err = request_irq(adapter->pdev->irq, &atl1_intr, irq_flags,
			netdev->name, netdev);
	if (unlikely(err))
		goto err_up;

	mod_timer(&adapter->watchdog_timer, jiffies);
	atlx_irq_enable(adapter);
	atl1_check_link(adapter);
	return 0;

err_up:
	pci_disable_msi(adapter->pdev);
	/* free rx_buffers */
	atl1_clean_rx_ring(adapter);
	return err;
}

static void atl1_down(struct atl1_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;

	del_timer_sync(&adapter->watchdog_timer);
	del_timer_sync(&adapter->phy_config_timer);
	adapter->phy_timer_pending = false;

	atlx_irq_disable(adapter);
	free_irq(adapter->pdev->irq, netdev);
	pci_disable_msi(adapter->pdev);
	atl1_reset_hw(&adapter->hw);
	adapter->cmb.cmb->int_stats = 0;

	adapter->link_speed = SPEED_0;
	adapter->link_duplex = -1;
	netif_carrier_off(netdev);
	netif_stop_queue(netdev);

	atl1_clean_tx_ring(adapter);
	atl1_clean_rx_ring(adapter);
}

static void atl1_tx_timeout_task(struct work_struct *work)
{
	struct atl1_adapter *adapter =
		container_of(work, struct atl1_adapter, tx_timeout_task);
	struct net_device *netdev = adapter->netdev;

	netif_device_detach(netdev);
	atl1_down(adapter);
	atl1_up(adapter);
	netif_device_attach(netdev);
}

/*
 * atl1_change_mtu - Change the Maximum Transfer Unit
 * @netdev: network interface device structure
 * @new_mtu: new value for maximum frame size
 *
 * Returns 0 on success, negative on failure
 */
static int atl1_change_mtu(struct net_device *netdev, int new_mtu)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	int old_mtu = netdev->mtu;
	int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;

	if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
	    (max_frame > MAX_JUMBO_FRAME_SIZE)) {
		if (netif_msg_link(adapter))
			dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
		return -EINVAL;
	}

	adapter->hw.max_frame_size = max_frame;
	adapter->hw.tx_jumbo_task_th = (max_frame + 7) >> 3;
	adapter->rx_buffer_len = (max_frame + 7) & ~7;
	adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;

	netdev->mtu = new_mtu;
	if ((old_mtu != new_mtu) && netif_running(netdev)) {
		atl1_down(adapter);
		atl1_up(adapter);
	}

	return 0;
}

/*
 * atl1_open - Called when a network interface is made active
 * @netdev: network interface device structure
 *
 * Returns 0 on success, negative value on failure
 *
 * The open entry point is called when a network interface is made
 * active by the system (IFF_UP).  At this point all resources needed
 * for transmit and receive operations are allocated, the interrupt
 * handler is registered with the OS, the watchdog timer is started,
 * and the stack is notified that the interface is ready.
 */
static int atl1_open(struct net_device *netdev)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	int err;

	/* allocate transmit descriptors */
	err = atl1_setup_ring_resources(adapter);
	if (err)
		return err;

	err = atl1_up(adapter);
	if (err)
		goto err_up;

	return 0;

err_up:
	atl1_reset(adapter);
	return err;
}

/*
 * atl1_close - Disables a network interface
 * @netdev: network interface device structure
 *
 * Returns 0, this is not allowed to fail
 *
 * The close entry point is called when an interface is de-activated
 * by the OS.  The hardware is still under the drivers control, but
 * needs to be disabled.  A global MAC reset is issued to stop the
 * hardware, and all transmit and receive resources are freed.
 */
static int atl1_close(struct net_device *netdev)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	atl1_down(adapter);
	atl1_free_ring_resources(adapter);
	return 0;
}

#ifdef CONFIG_PM
static int atl1_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1_adapter *adapter = netdev_priv(netdev);
	struct atl1_hw *hw = &adapter->hw;
	u32 ctrl = 0;
	u32 wufc = adapter->wol;
	u32 val;
	int retval;
	u16 speed;
	u16 duplex;

	netif_device_detach(netdev);
	if (netif_running(netdev))
		atl1_down(adapter);

	retval = pci_save_state(pdev);
	if (retval)
		return retval;

	atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
	atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
	val = ctrl & BMSR_LSTATUS;
	if (val)
		wufc &= ~ATLX_WUFC_LNKC;

	if (val && wufc) {
		val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
		if (val) {
			if (netif_msg_ifdown(adapter))
				dev_printk(KERN_DEBUG, &pdev->dev,
					"error getting speed/duplex\n");
			goto disable_wol;
		}

		ctrl = 0;

		/* enable magic packet WOL */
		if (wufc & ATLX_WUFC_MAG)
			ctrl |= (WOL_MAGIC_EN | WOL_MAGIC_PME_EN);
		iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
		ioread32(hw->hw_addr + REG_WOL_CTRL);

		/* configure the mac */
		ctrl = MAC_CTRL_RX_EN;
		ctrl |= ((u32)((speed == SPEED_1000) ? MAC_CTRL_SPEED_1000 :
			MAC_CTRL_SPEED_10_100) << MAC_CTRL_SPEED_SHIFT);
		if (duplex == FULL_DUPLEX)
			ctrl |= MAC_CTRL_DUPLX;
		ctrl |= (((u32)adapter->hw.preamble_len &
			MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
		if (adapter->vlgrp)
			ctrl |= MAC_CTRL_RMV_VLAN;
		if (wufc & ATLX_WUFC_MAG)
			ctrl |= MAC_CTRL_BC_EN;
		iowrite32(ctrl, hw->hw_addr + REG_MAC_CTRL);
		ioread32(hw->hw_addr + REG_MAC_CTRL);

		/* poke the PHY */
		ctrl = ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
		ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
		iowrite32(ctrl, hw->hw_addr + REG_PCIE_PHYMISC);
		ioread32(hw->hw_addr + REG_PCIE_PHYMISC);

		pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
		goto exit;
	}

	if (!val && wufc) {
		ctrl |= (WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN);
		iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
		ioread32(hw->hw_addr + REG_WOL_CTRL);
		iowrite32(0, hw->hw_addr + REG_MAC_CTRL);
		ioread32(hw->hw_addr + REG_MAC_CTRL);
		hw->phy_configured = false;
		pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
		goto exit;
	}

disable_wol:
	iowrite32(0, hw->hw_addr + REG_WOL_CTRL);
	ioread32(hw->hw_addr + REG_WOL_CTRL);
	ctrl = ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
	ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
	iowrite32(ctrl, hw->hw_addr + REG_PCIE_PHYMISC);
	ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
	atl1_phy_enter_power_saving(hw);
	hw->phy_configured = false;
	pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
exit:
	if (netif_running(netdev))
		pci_disable_msi(adapter->pdev);
	pci_disable_device(pdev);
	pci_set_power_state(pdev, pci_choose_state(pdev, state));

	return 0;
}

static int atl1_resume(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1_adapter *adapter = netdev_priv(netdev);
	u32 err;

	pci_set_power_state(pdev, PCI_D0);
	pci_restore_state(pdev);

	err = pci_enable_device(pdev);
	if (err) {
		if (netif_msg_ifup(adapter))
			dev_printk(KERN_DEBUG, &pdev->dev,
				"error enabling pci device\n");
		return err;
	}

	pci_set_master(pdev);
	iowrite32(0, adapter->hw.hw_addr + REG_WOL_CTRL);
	pci_enable_wake(pdev, PCI_D3hot, 0);
	pci_enable_wake(pdev, PCI_D3cold, 0);

	atl1_reset_hw(&adapter->hw);
	adapter->cmb.cmb->int_stats = 0;

	if (netif_running(netdev))
		atl1_up(adapter);
	netif_device_attach(netdev);

	return 0;
}
#else
#define atl1_suspend NULL
#define atl1_resume NULL
#endif

static void atl1_shutdown(struct pci_dev *pdev)
{
#ifdef CONFIG_PM
	atl1_suspend(pdev, PMSG_SUSPEND);
#endif
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void atl1_poll_controller(struct net_device *netdev)
{
	disable_irq(netdev->irq);
	atl1_intr(netdev->irq, netdev);
	enable_irq(netdev->irq);
}
#endif

/*
 * atl1_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in atl1_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * atl1_probe initializes an adapter identified by a pci_dev structure.
 * The OS initialization, configuring of the adapter private structure,
 * and a hardware reset occur.
 */
static int __devinit atl1_probe(struct pci_dev *pdev,
	const struct pci_device_id *ent)
{
	struct net_device *netdev;
	struct atl1_adapter *adapter;
	static int cards_found = 0;
	int err;

	err = pci_enable_device(pdev);
	if (err)
		return err;

	/*
	 * The atl1 chip can DMA to 64-bit addresses, but it uses a single
	 * shared register for the high 32 bits, so only a single, aligned,
	 * 4 GB physical address range can be used at a time.
	 *
	 * Supporting 64-bit DMA on this hardware is more trouble than it's
	 * worth.  It is far easier to limit to 32-bit DMA than update
	 * various kernel subsystems to support the mechanics required by a
	 * fixed-high-32-bit system.
	 */
	err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
	if (err) {
		dev_err(&pdev->dev, "no usable DMA configuration\n");
		goto err_dma;
	}
	/*
	 * Mark all PCI regions associated with PCI device
	 * pdev as being reserved by owner atl1_driver_name
	 */
	err = pci_request_regions(pdev, ATLX_DRIVER_NAME);
	if (err)
		goto err_request_regions;

	/*
	 * Enables bus-mastering on the device and calls
	 * pcibios_set_master to do the needed arch specific settings
	 */
	pci_set_master(pdev);

	netdev = alloc_etherdev(sizeof(struct atl1_adapter));
	if (!netdev) {
		err = -ENOMEM;
		goto err_alloc_etherdev;
	}
	SET_NETDEV_DEV(netdev, &pdev->dev);

	pci_set_drvdata(pdev, netdev);
	adapter = netdev_priv(netdev);
	adapter->netdev = netdev;
	adapter->pdev = pdev;
	adapter->hw.back = adapter;
	adapter->msg_enable = netif_msg_init(debug, atl1_default_msg);

	adapter->hw.hw_addr = pci_iomap(pdev, 0, 0);
	if (!adapter->hw.hw_addr) {
		err = -EIO;
		goto err_pci_iomap;
	}
	/* get device revision number */
	adapter->hw.dev_rev = ioread16(adapter->hw.hw_addr +
		(REG_MASTER_CTRL + 2));
	if (netif_msg_probe(adapter))
		dev_info(&pdev->dev, "version %s\n", ATLX_DRIVER_VERSION);

	/* set default ring resource counts */
	adapter->rfd_ring.count = adapter->rrd_ring.count = ATL1_DEFAULT_RFD;
	adapter->tpd_ring.count = ATL1_DEFAULT_TPD;

	adapter->mii.dev = netdev;
	adapter->mii.mdio_read = mdio_read;
	adapter->mii.mdio_write = mdio_write;
	adapter->mii.phy_id_mask = 0x1f;
	adapter->mii.reg_num_mask = 0x1f;

	netdev->open = &atl1_open;
	netdev->stop = &atl1_close;
	netdev->hard_start_xmit = &atl1_xmit_frame;
	netdev->get_stats = &atlx_get_stats;
	netdev->set_multicast_list = &atlx_set_multi;
	netdev->set_mac_address = &atl1_set_mac;
	netdev->change_mtu = &atl1_change_mtu;
	netdev->do_ioctl = &atlx_ioctl;
	netdev->tx_timeout = &atlx_tx_timeout;
	netdev->watchdog_timeo = 5 * HZ;
#ifdef CONFIG_NET_POLL_CONTROLLER
	netdev->poll_controller = atl1_poll_controller;
#endif
	netdev->vlan_rx_register = atlx_vlan_rx_register;

	netdev->ethtool_ops = &atl1_ethtool_ops;
	adapter->bd_number = cards_found;

	/* setup the private structure */
	err = atl1_sw_init(adapter);
	if (err)
		goto err_common;

	netdev->features = NETIF_F_HW_CSUM;
	netdev->features |= NETIF_F_SG;
	netdev->features |= (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
	netdev->features |= NETIF_F_TSO;
	netdev->features |= NETIF_F_LLTX;

	/*
	 * patch for some L1 of old version,
	 * the final version of L1 may not need these
	 * patches
	 */
	/* atl1_pcie_patch(adapter); */

	/* really reset GPHY core */
	iowrite16(0, adapter->hw.hw_addr + REG_PHY_ENABLE);

	/*
	 * reset the controller to
	 * put the device in a known good starting state
	 */
	if (atl1_reset_hw(&adapter->hw)) {
		err = -EIO;
		goto err_common;
	}

	/* copy the MAC address out of the EEPROM */
	atl1_read_mac_addr(&adapter->hw);
	memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);

	if (!is_valid_ether_addr(netdev->dev_addr)) {
		err = -EIO;
		goto err_common;
	}

	atl1_check_options(adapter);

	/* pre-init the MAC, and setup link */
	err = atl1_init_hw(&adapter->hw);
	if (err) {
		err = -EIO;
		goto err_common;
	}

	atl1_pcie_patch(adapter);
	/* assume we have no link for now */
	netif_carrier_off(netdev);
	netif_stop_queue(netdev);

	init_timer(&adapter->watchdog_timer);
	adapter->watchdog_timer.function = &atl1_watchdog;
	adapter->watchdog_timer.data = (unsigned long)adapter;

	init_timer(&adapter->phy_config_timer);
	adapter->phy_config_timer.function = &atl1_phy_config;
	adapter->phy_config_timer.data = (unsigned long)adapter;
	adapter->phy_timer_pending = false;

	INIT_WORK(&adapter->tx_timeout_task, atl1_tx_timeout_task);

	INIT_WORK(&adapter->link_chg_task, atlx_link_chg_task);

	INIT_WORK(&adapter->pcie_dma_to_rst_task, atl1_tx_timeout_task);

	err = register_netdev(netdev);
	if (err)
		goto err_common;

	cards_found++;
	atl1_via_workaround(adapter);
	return 0;

err_common:
	pci_iounmap(pdev, adapter->hw.hw_addr);
err_pci_iomap:
	free_netdev(netdev);
err_alloc_etherdev:
	pci_release_regions(pdev);
err_dma:
err_request_regions:
	pci_disable_device(pdev);
	return err;
}

/*
 * atl1_remove - Device Removal Routine
 * @pdev: PCI device information struct
 *
 * atl1_remove is called by the PCI subsystem to alert the driver
 * that it should release a PCI device.  The could be caused by a
 * Hot-Plug event, or because the driver is going to be removed from
 * memory.
 */
static void __devexit atl1_remove(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct atl1_adapter *adapter;
	/* Device not available. Return. */
	if (!netdev)
		return;

	adapter = netdev_priv(netdev);

	/*
	 * Some atl1 boards lack persistent storage for their MAC, and get it
	 * from the BIOS during POST.  If we've been messing with the MAC
	 * address, we need to save the permanent one.
	 */
	if (memcmp(adapter->hw.mac_addr, adapter->hw.perm_mac_addr, ETH_ALEN)) {
		memcpy(adapter->hw.mac_addr, adapter->hw.perm_mac_addr,
			ETH_ALEN);
		atl1_set_mac_addr(&adapter->hw);
	}

	iowrite16(0, adapter->hw.hw_addr + REG_PHY_ENABLE);
	unregister_netdev(netdev);
	pci_iounmap(pdev, adapter->hw.hw_addr);
	pci_release_regions(pdev);
	free_netdev(netdev);
	pci_disable_device(pdev);
}

static struct pci_driver atl1_driver = {
	.name = ATLX_DRIVER_NAME,
	.id_table = atl1_pci_tbl,
	.probe = atl1_probe,
	.remove = __devexit_p(atl1_remove),
	.suspend = atl1_suspend,
	.resume = atl1_resume,
	.shutdown = atl1_shutdown
};

/*
 * atl1_exit_module - Driver Exit Cleanup Routine
 *
 * atl1_exit_module is called just before the driver is removed
 * from memory.
 */
static void __exit atl1_exit_module(void)
{
	pci_unregister_driver(&atl1_driver);
}

/*
 * atl1_init_module - Driver Registration Routine
 *
 * atl1_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 */
static int __init atl1_init_module(void)
{
	return pci_register_driver(&atl1_driver);
}

module_init(atl1_init_module);
module_exit(atl1_exit_module);

struct atl1_stats {
	char stat_string[ETH_GSTRING_LEN];
	int sizeof_stat;
	int stat_offset;
};

#define ATL1_STAT(m) \
	sizeof(((struct atl1_adapter *)0)->m), offsetof(struct atl1_adapter, m)

static struct atl1_stats atl1_gstrings_stats[] = {
	{"rx_packets", ATL1_STAT(soft_stats.rx_packets)},
	{"tx_packets", ATL1_STAT(soft_stats.tx_packets)},
	{"rx_bytes", ATL1_STAT(soft_stats.rx_bytes)},
	{"tx_bytes", ATL1_STAT(soft_stats.tx_bytes)},
	{"rx_errors", ATL1_STAT(soft_stats.rx_errors)},
	{"tx_errors", ATL1_STAT(soft_stats.tx_errors)},
	{"rx_dropped", ATL1_STAT(net_stats.rx_dropped)},
	{"tx_dropped", ATL1_STAT(net_stats.tx_dropped)},
	{"multicast", ATL1_STAT(soft_stats.multicast)},
	{"collisions", ATL1_STAT(soft_stats.collisions)},
	{"rx_length_errors", ATL1_STAT(soft_stats.rx_length_errors)},
	{"rx_over_errors", ATL1_STAT(soft_stats.rx_missed_errors)},
	{"rx_crc_errors", ATL1_STAT(soft_stats.rx_crc_errors)},
	{"rx_frame_errors", ATL1_STAT(soft_stats.rx_frame_errors)},
	{"rx_fifo_errors", ATL1_STAT(soft_stats.rx_fifo_errors)},
	{"rx_missed_errors", ATL1_STAT(soft_stats.rx_missed_errors)},
	{"tx_aborted_errors", ATL1_STAT(soft_stats.tx_aborted_errors)},
	{"tx_carrier_errors", ATL1_STAT(soft_stats.tx_carrier_errors)},
	{"tx_fifo_errors", ATL1_STAT(soft_stats.tx_fifo_errors)},
	{"tx_window_errors", ATL1_STAT(soft_stats.tx_window_errors)},
	{"tx_abort_exce_coll", ATL1_STAT(soft_stats.excecol)},
	{"tx_abort_late_coll", ATL1_STAT(soft_stats.latecol)},
	{"tx_deferred_ok", ATL1_STAT(soft_stats.deffer)},
	{"tx_single_coll_ok", ATL1_STAT(soft_stats.scc)},
	{"tx_multi_coll_ok", ATL1_STAT(soft_stats.mcc)},
	{"tx_underun", ATL1_STAT(soft_stats.tx_underun)},
	{"tx_trunc", ATL1_STAT(soft_stats.tx_trunc)},
	{"tx_pause", ATL1_STAT(soft_stats.tx_pause)},
	{"rx_pause", ATL1_STAT(soft_stats.rx_pause)},
	{"rx_rrd_ov", ATL1_STAT(soft_stats.rx_rrd_ov)},
	{"rx_trunc", ATL1_STAT(soft_stats.rx_trunc)}
};

static void atl1_get_ethtool_stats(struct net_device *netdev,
	struct ethtool_stats *stats, u64 *data)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	int i;
	char *p;

	for (i = 0; i < ARRAY_SIZE(atl1_gstrings_stats); i++) {
		p = (char *)adapter+atl1_gstrings_stats[i].stat_offset;
		data[i] = (atl1_gstrings_stats[i].sizeof_stat ==
			sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
	}

}

static int atl1_get_sset_count(struct net_device *netdev, int sset)
{
	switch (sset) {
	case ETH_SS_STATS:
		return ARRAY_SIZE(atl1_gstrings_stats);
	default:
		return -EOPNOTSUPP;
	}
}

static int atl1_get_settings(struct net_device *netdev,
	struct ethtool_cmd *ecmd)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	struct atl1_hw *hw = &adapter->hw;

	ecmd->supported = (SUPPORTED_10baseT_Half |
			   SUPPORTED_10baseT_Full |
			   SUPPORTED_100baseT_Half |
			   SUPPORTED_100baseT_Full |
			   SUPPORTED_1000baseT_Full |
			   SUPPORTED_Autoneg | SUPPORTED_TP);
	ecmd->advertising = ADVERTISED_TP;
	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
	    hw->media_type == MEDIA_TYPE_1000M_FULL) {
		ecmd->advertising |= ADVERTISED_Autoneg;
		if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR) {
			ecmd->advertising |= ADVERTISED_Autoneg;
			ecmd->advertising |=
			    (ADVERTISED_10baseT_Half |
			     ADVERTISED_10baseT_Full |
			     ADVERTISED_100baseT_Half |
			     ADVERTISED_100baseT_Full |
			     ADVERTISED_1000baseT_Full);
		} else
			ecmd->advertising |= (ADVERTISED_1000baseT_Full);
	}
	ecmd->port = PORT_TP;
	ecmd->phy_address = 0;
	ecmd->transceiver = XCVR_INTERNAL;

	if (netif_carrier_ok(adapter->netdev)) {
		u16 link_speed, link_duplex;
		atl1_get_speed_and_duplex(hw, &link_speed, &link_duplex);
		ecmd->speed = link_speed;
		if (link_duplex == FULL_DUPLEX)
			ecmd->duplex = DUPLEX_FULL;
		else
			ecmd->duplex = DUPLEX_HALF;
	} else {
		ecmd->speed = -1;
		ecmd->duplex = -1;
	}
	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
	    hw->media_type == MEDIA_TYPE_1000M_FULL)
		ecmd->autoneg = AUTONEG_ENABLE;
	else
		ecmd->autoneg = AUTONEG_DISABLE;

	return 0;
}

static int atl1_set_settings(struct net_device *netdev,
	struct ethtool_cmd *ecmd)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	struct atl1_hw *hw = &adapter->hw;
	u16 phy_data;
	int ret_val = 0;
	u16 old_media_type = hw->media_type;

	if (netif_running(adapter->netdev)) {
		if (netif_msg_link(adapter))
			dev_dbg(&adapter->pdev->dev,
				"ethtool shutting down adapter\n");
		atl1_down(adapter);
	}

	if (ecmd->autoneg == AUTONEG_ENABLE)
		hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
	else {
		if (ecmd->speed == SPEED_1000) {
			if (ecmd->duplex != DUPLEX_FULL) {
				if (netif_msg_link(adapter))
					dev_warn(&adapter->pdev->dev,
						"1000M half is invalid\n");
				ret_val = -EINVAL;
				goto exit_sset;
			}
			hw->media_type = MEDIA_TYPE_1000M_FULL;
		} else if (ecmd->speed == SPEED_100) {
			if (ecmd->duplex == DUPLEX_FULL)
				hw->media_type = MEDIA_TYPE_100M_FULL;
			else
				hw->media_type = MEDIA_TYPE_100M_HALF;
		} else {
			if (ecmd->duplex == DUPLEX_FULL)
				hw->media_type = MEDIA_TYPE_10M_FULL;
			else
				hw->media_type = MEDIA_TYPE_10M_HALF;
		}
	}
	switch (hw->media_type) {
	case MEDIA_TYPE_AUTO_SENSOR:
		ecmd->advertising =
		    ADVERTISED_10baseT_Half |
		    ADVERTISED_10baseT_Full |
		    ADVERTISED_100baseT_Half |
		    ADVERTISED_100baseT_Full |
		    ADVERTISED_1000baseT_Full |
		    ADVERTISED_Autoneg | ADVERTISED_TP;
		break;
	case MEDIA_TYPE_1000M_FULL:
		ecmd->advertising =
		    ADVERTISED_1000baseT_Full |
		    ADVERTISED_Autoneg | ADVERTISED_TP;
		break;
	default:
		ecmd->advertising = 0;
		break;
	}
	if (atl1_phy_setup_autoneg_adv(hw)) {
		ret_val = -EINVAL;
		if (netif_msg_link(adapter))
			dev_warn(&adapter->pdev->dev,
				"invalid ethtool speed/duplex setting\n");
		goto exit_sset;
	}
	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
	    hw->media_type == MEDIA_TYPE_1000M_FULL)
		phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN;
	else {
		switch (hw->media_type) {
		case MEDIA_TYPE_100M_FULL:
			phy_data =
			    MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
			    MII_CR_RESET;
			break;
		case MEDIA_TYPE_100M_HALF:
			phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
			break;
		case MEDIA_TYPE_10M_FULL:
			phy_data =
			    MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
			break;
		default:
			/* MEDIA_TYPE_10M_HALF: */
			phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
			break;
		}
	}
	atl1_write_phy_reg(hw, MII_BMCR, phy_data);
exit_sset:
	if (ret_val)
		hw->media_type = old_media_type;

	if (netif_running(adapter->netdev)) {
		if (netif_msg_link(adapter))
			dev_dbg(&adapter->pdev->dev,
				"ethtool starting adapter\n");
		atl1_up(adapter);
	} else if (!ret_val) {
		if (netif_msg_link(adapter))
			dev_dbg(&adapter->pdev->dev,
				"ethtool resetting adapter\n");
		atl1_reset(adapter);
	}
	return ret_val;
}

static void atl1_get_drvinfo(struct net_device *netdev,
	struct ethtool_drvinfo *drvinfo)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);

	strncpy(drvinfo->driver, ATLX_DRIVER_NAME, sizeof(drvinfo->driver));
	strncpy(drvinfo->version, ATLX_DRIVER_VERSION,
		sizeof(drvinfo->version));
	strncpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
	strncpy(drvinfo->bus_info, pci_name(adapter->pdev),
		sizeof(drvinfo->bus_info));
	drvinfo->eedump_len = ATL1_EEDUMP_LEN;
}

static void atl1_get_wol(struct net_device *netdev,
	struct ethtool_wolinfo *wol)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);

	wol->supported = WAKE_UCAST | WAKE_MCAST | WAKE_BCAST | WAKE_MAGIC;
	wol->wolopts = 0;
	if (adapter->wol & ATLX_WUFC_EX)
		wol->wolopts |= WAKE_UCAST;
	if (adapter->wol & ATLX_WUFC_MC)
		wol->wolopts |= WAKE_MCAST;
	if (adapter->wol & ATLX_WUFC_BC)
		wol->wolopts |= WAKE_BCAST;
	if (adapter->wol & ATLX_WUFC_MAG)
		wol->wolopts |= WAKE_MAGIC;
	return;
}

static int atl1_set_wol(struct net_device *netdev,
	struct ethtool_wolinfo *wol)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);

	if (wol->wolopts & (WAKE_PHY | WAKE_ARP | WAKE_MAGICSECURE))
		return -EOPNOTSUPP;
	adapter->wol = 0;
	if (wol->wolopts & WAKE_UCAST)
		adapter->wol |= ATLX_WUFC_EX;
	if (wol->wolopts & WAKE_MCAST)
		adapter->wol |= ATLX_WUFC_MC;
	if (wol->wolopts & WAKE_BCAST)
		adapter->wol |= ATLX_WUFC_BC;
	if (wol->wolopts & WAKE_MAGIC)
		adapter->wol |= ATLX_WUFC_MAG;
	return 0;
}

static u32 atl1_get_msglevel(struct net_device *netdev)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	return adapter->msg_enable;
}

static void atl1_set_msglevel(struct net_device *netdev, u32 value)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	adapter->msg_enable = value;
}

static int atl1_get_regs_len(struct net_device *netdev)
{
	return ATL1_REG_COUNT * sizeof(u32);
}

static void atl1_get_regs(struct net_device *netdev, struct ethtool_regs *regs,
	void *p)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	struct atl1_hw *hw = &adapter->hw;
	unsigned int i;
	u32 *regbuf = p;

	for (i = 0; i < ATL1_REG_COUNT; i++) {
		/*
		 * This switch statement avoids reserved regions
		 * of register space.
		 */
		switch (i) {
		case 6 ... 9:
		case 14:
		case 29 ... 31:
		case 34 ... 63:
		case 75 ... 127:
		case 136 ... 1023:
		case 1027 ... 1087:
		case 1091 ... 1151:
		case 1194 ... 1195:
		case 1200 ... 1201:
		case 1206 ... 1213:
		case 1216 ... 1279:
		case 1290 ... 1311:
		case 1323 ... 1343:
		case 1358 ... 1359:
		case 1368 ... 1375:
		case 1378 ... 1383:
		case 1388 ... 1391:
		case 1393 ... 1395:
		case 1402 ... 1403:
		case 1410 ... 1471:
		case 1522 ... 1535:
			/* reserved region; don't read it */
			regbuf[i] = 0;
			break;
		default:
			/* unreserved region */
			regbuf[i] = ioread32(hw->hw_addr + (i * sizeof(u32)));
		}
	}
}

static void atl1_get_ringparam(struct net_device *netdev,
	struct ethtool_ringparam *ring)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	struct atl1_tpd_ring *txdr = &adapter->tpd_ring;
	struct atl1_rfd_ring *rxdr = &adapter->rfd_ring;

	ring->rx_max_pending = ATL1_MAX_RFD;
	ring->tx_max_pending = ATL1_MAX_TPD;
	ring->rx_mini_max_pending = 0;
	ring->rx_jumbo_max_pending = 0;
	ring->rx_pending = rxdr->count;
	ring->tx_pending = txdr->count;
	ring->rx_mini_pending = 0;
	ring->rx_jumbo_pending = 0;
}

static int atl1_set_ringparam(struct net_device *netdev,
	struct ethtool_ringparam *ring)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	struct atl1_tpd_ring *tpdr = &adapter->tpd_ring;
	struct atl1_rrd_ring *rrdr = &adapter->rrd_ring;
	struct atl1_rfd_ring *rfdr = &adapter->rfd_ring;

	struct atl1_tpd_ring tpd_old, tpd_new;
	struct atl1_rfd_ring rfd_old, rfd_new;
	struct atl1_rrd_ring rrd_old, rrd_new;
	struct atl1_ring_header rhdr_old, rhdr_new;
	int err;

	tpd_old = adapter->tpd_ring;
	rfd_old = adapter->rfd_ring;
	rrd_old = adapter->rrd_ring;
	rhdr_old = adapter->ring_header;

	if (netif_running(adapter->netdev))
		atl1_down(adapter);

	rfdr->count = (u16) max(ring->rx_pending, (u32) ATL1_MIN_RFD);
	rfdr->count = rfdr->count > ATL1_MAX_RFD ? ATL1_MAX_RFD :
			rfdr->count;
	rfdr->count = (rfdr->count + 3) & ~3;
	rrdr->count = rfdr->count;

	tpdr->count = (u16) max(ring->tx_pending, (u32) ATL1_MIN_TPD);
	tpdr->count = tpdr->count > ATL1_MAX_TPD ? ATL1_MAX_TPD :
			tpdr->count;
	tpdr->count = (tpdr->count + 3) & ~3;

	if (netif_running(adapter->netdev)) {
		/* try to get new resources before deleting old */
		err = atl1_setup_ring_resources(adapter);
		if (err)
			goto err_setup_ring;

		/*
		 * save the new, restore the old in order to free it,
		 * then restore the new back again
		 */

		rfd_new = adapter->rfd_ring;
		rrd_new = adapter->rrd_ring;
		tpd_new = adapter->tpd_ring;
		rhdr_new = adapter->ring_header;
		adapter->rfd_ring = rfd_old;
		adapter->rrd_ring = rrd_old;
		adapter->tpd_ring = tpd_old;
		adapter->ring_header = rhdr_old;
		atl1_free_ring_resources(adapter);
		adapter->rfd_ring = rfd_new;
		adapter->rrd_ring = rrd_new;
		adapter->tpd_ring = tpd_new;
		adapter->ring_header = rhdr_new;

		err = atl1_up(adapter);
		if (err)
			return err;
	}
	return 0;

err_setup_ring:
	adapter->rfd_ring = rfd_old;
	adapter->rrd_ring = rrd_old;
	adapter->tpd_ring = tpd_old;
	adapter->ring_header = rhdr_old;
	atl1_up(adapter);
	return err;
}

static void atl1_get_pauseparam(struct net_device *netdev,
	struct ethtool_pauseparam *epause)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	struct atl1_hw *hw = &adapter->hw;

	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
	    hw->media_type == MEDIA_TYPE_1000M_FULL) {
		epause->autoneg = AUTONEG_ENABLE;
	} else {
		epause->autoneg = AUTONEG_DISABLE;
	}
	epause->rx_pause = 1;
	epause->tx_pause = 1;
}

static int atl1_set_pauseparam(struct net_device *netdev,
	struct ethtool_pauseparam *epause)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	struct atl1_hw *hw = &adapter->hw;

	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
	    hw->media_type == MEDIA_TYPE_1000M_FULL) {
		epause->autoneg = AUTONEG_ENABLE;
	} else {
		epause->autoneg = AUTONEG_DISABLE;
	}

	epause->rx_pause = 1;
	epause->tx_pause = 1;

	return 0;
}

/* FIXME: is this right? -- CHS */
static u32 atl1_get_rx_csum(struct net_device *netdev)
{
	return 1;
}

static void atl1_get_strings(struct net_device *netdev, u32 stringset,
	u8 *data)
{
	u8 *p = data;
	int i;

	switch (stringset) {
	case ETH_SS_STATS:
		for (i = 0; i < ARRAY_SIZE(atl1_gstrings_stats); i++) {
			memcpy(p, atl1_gstrings_stats[i].stat_string,
				ETH_GSTRING_LEN);
			p += ETH_GSTRING_LEN;
		}
		break;
	}
}

static int atl1_nway_reset(struct net_device *netdev)
{
	struct atl1_adapter *adapter = netdev_priv(netdev);
	struct atl1_hw *hw = &adapter->hw;

	if (netif_running(netdev)) {
		u16 phy_data;
		atl1_down(adapter);

		if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
			hw->media_type == MEDIA_TYPE_1000M_FULL) {
			phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN;
		} else {
			switch (hw->media_type) {
			case MEDIA_TYPE_100M_FULL:
				phy_data = MII_CR_FULL_DUPLEX |
					MII_CR_SPEED_100 | MII_CR_RESET;
				break;
			case MEDIA_TYPE_100M_HALF:
				phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
				break;
			case MEDIA_TYPE_10M_FULL:
				phy_data = MII_CR_FULL_DUPLEX |
					MII_CR_SPEED_10 | MII_CR_RESET;
				break;
			default:
				/* MEDIA_TYPE_10M_HALF */
				phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
			}
		}
		atl1_write_phy_reg(hw, MII_BMCR, phy_data);
		atl1_up(adapter);
	}
	return 0;
}

const struct ethtool_ops atl1_ethtool_ops = {
	.get_settings		= atl1_get_settings,
	.set_settings		= atl1_set_settings,
	.get_drvinfo		= atl1_get_drvinfo,
	.get_wol		= atl1_get_wol,
	.set_wol		= atl1_set_wol,
	.get_msglevel		= atl1_get_msglevel,
	.set_msglevel		= atl1_set_msglevel,
	.get_regs_len		= atl1_get_regs_len,
	.get_regs		= atl1_get_regs,
	.get_ringparam		= atl1_get_ringparam,
	.set_ringparam		= atl1_set_ringparam,
	.get_pauseparam		= atl1_get_pauseparam,
	.set_pauseparam		= atl1_set_pauseparam,
	.get_rx_csum		= atl1_get_rx_csum,
	.set_tx_csum		= ethtool_op_set_tx_hw_csum,
	.get_link		= ethtool_op_get_link,
	.set_sg			= ethtool_op_set_sg,
	.get_strings		= atl1_get_strings,
	.nway_reset		= atl1_nway_reset,
	.get_ethtool_stats	= atl1_get_ethtool_stats,
	.get_sset_count		= atl1_get_sset_count,
	.set_tso		= ethtool_op_set_tso,
};

diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 6bf9e76b0a00..6eb2d31d1e34 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig
@@ -5,7 +5,7 @@
5	menuconfig PHYLIB	5	menuconfig PHYLIB
6	tristate "PHY Device support and infrastructure"	6	tristate "PHY Device support and infrastructure"
7	depends on !S390	7	depends on !S390
8	depends on NET_ETHERNET && (BROKEN \|\| !S390)	8	depends on NET_ETHERNET
9	help	9	help
10	Ethernet controllers are usually attached to PHY	10	Ethernet controllers are usually attached to PHY
11	devices. This option provides infrastructure for	11	devices. This option provides infrastructure for