/*****************************************************************************
 *                                                                           *
 * File: cxgb2.c                                                             *
 * $Revision: 1.25 $                                                         *
 * $Date: 2005/06/22 00:43:25 $                                              *
 * Description:                                                              *
 *  Chelsio 10Gb Ethernet Driver.                                            *
 *                                                                           *
 * This program is free software; you can redistribute it and/or modify      *
 * it under the terms of the GNU General Public License, version 2, as       *
 * published by the Free Software Foundation.                                *
 *                                                                           *
 * You should have received a copy of the GNU General Public License along   *
 * with this program; if not, see <http://www.gnu.org/licenses/>.            *
 *                                                                           *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED    *
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF      *
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.                     *
 *                                                                           *
 * http://www.chelsio.com                                                    *
 *                                                                           *
 * Copyright (c) 2003 - 2005 Chelsio Communications, Inc.                    *
 * All rights reserved.                                                      *
 *                                                                           *
 * Maintainers: maintainers@chelsio.com                                      *
 *                                                                           *
 * Authors: Dimitrios Michailidis   <dm@chelsio.com>                         *
 *          Tina Yang               <tainay@chelsio.com>                     *
 *          Felix Marti             <felix@chelsio.com>                      *
 *          Scott Bardone           <sbardone@chelsio.com>                   *
 *          Kurt Ottaway            <kottaway@chelsio.com>                   *
 *          Frank DiMambro          <frank@chelsio.com>                      *
 *                                                                           *
 * History:                                                                  *
 *                                                                           *
 ****************************************************************************/

#include "common.h"
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
#include <linux/mii.h>
#include <linux/sockios.h>
#include <linux/dma-mapping.h>
#include <linux/uaccess.h>

#include "cpl5_cmd.h"
#include "regs.h"
#include "gmac.h"
#include "cphy.h"
#include "sge.h"
#include "tp.h"
#include "espi.h"
#include "elmer0.h"

#include <linux/workqueue.h>

static inline void schedule_mac_stats_update(struct adapter *ap, int secs)
{
        schedule_delayed_work(&ap->stats_update_task, secs * HZ);
}

static inline void cancel_mac_stats_update(struct adapter *ap)
{
        cancel_delayed_work(&ap->stats_update_task);
}

#define MAX_CMDQ_ENTRIES        16384
#define MAX_CMDQ1_ENTRIES       1024
#define MAX_RX_BUFFERS          16384
#define MAX_RX_JUMBO_BUFFERS    16384
#define MAX_TX_BUFFERS_HIGH     16384U
#define MAX_TX_BUFFERS_LOW      1536U
#define MAX_TX_BUFFERS          1460U
#define MIN_FL_ENTRIES          32

#define DFLT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \
                         NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP |\
                         NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)

/*
 * The EEPROM is actually bigger but only the first few bytes are used so we
 * only report those.
 */
#define EEPROM_SIZE 32

MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR("Chelsio Communications");
MODULE_LICENSE("GPL");

static int dflt_msg_enable = DFLT_MSG_ENABLE;

module_param(dflt_msg_enable, int, 0);
MODULE_PARM_DESC(dflt_msg_enable, "Chelsio T1 default message enable bitmap");

#define HCLOCK 0x0
#define LCLOCK 0x1

/* T1 cards powersave mode */
static int t1_clock(struct adapter *adapter, int mode);
static int t1powersave = 1;     /* HW default is powersave mode. */

module_param(t1powersave, int, 0);
MODULE_PARM_DESC(t1powersave, "Enable/Disable T1 powersaving mode");

static int disable_msi = 0;
module_param(disable_msi, int, 0);
MODULE_PARM_DESC(disable_msi, "Disable Message Signaled Interrupt (MSI)");

/*
 * Setup MAC to receive the types of packets we want.
 */
static void t1_set_rxmode(struct net_device *dev)
{
        struct adapter *adapter = dev->ml_priv;
        struct cmac *mac = adapter->port[dev->if_port].mac;
        struct t1_rx_mode rm;

        rm.dev = dev;
        mac->ops->set_rx_mode(mac, &rm);
}

static void link_report(struct port_info *p)
{
        if (!netif_carrier_ok(p->dev))
                netdev_info(p->dev, "link down\n");
        else {
                const char *s = "10Mbps";

                switch (p->link_config.speed) {
                        case SPEED_10000: s = "10Gbps"; break;
                        case SPEED_1000:  s = "1000Mbps"; break;
                        case SPEED_100:   s = "100Mbps"; break;
                }

                netdev_info(p->dev, "link up, %s, %s-duplex\n",
                            s, p->link_config.duplex == DUPLEX_FULL
                            ? "full" : "half");
        }
}

void t1_link_negotiated(struct adapter *adapter, int port_id, int link_stat,
                        int speed, int duplex, int pause)
{
        struct port_info *p = &adapter->port[port_id];

        if (link_stat != netif_carrier_ok(p->dev)) {
                if (link_stat)
                        netif_carrier_on(p->dev);
                else
                        netif_carrier_off(p->dev);
                link_report(p);

                /* multi-ports: inform toe */
                if ((speed > 0) && (adapter->params.nports > 1)) {
                        unsigned int sched_speed = 10;
                        switch (speed) {
                        case SPEED_1000:
                                sched_speed = 1000;
                                break;
                        case SPEED_100:
                                sched_speed = 100;
                                break;
                        case SPEED_10:
                                sched_speed = 10;
                                break;
                        }
                        t1_sched_update_parms(adapter->sge, port_id, 0, sched_speed);
                }
        }
}

static void link_start(struct port_info *p)
{
        struct cmac *mac = p->mac;

        mac->ops->reset(mac);
        if (mac->ops->macaddress_set)
                mac->ops->macaddress_set(mac, p->dev->dev_addr);
        t1_set_rxmode(p->dev);
        t1_link_start(p->phy, mac, &p->link_config);
        mac->ops->enable(mac, MAC_DIRECTION_RX | MAC_DIRECTION_TX);
}

static void enable_hw_csum(struct adapter *adapter)
{
        if (adapter->port[0].dev->hw_features & NETIF_F_TSO)
                t1_tp_set_ip_checksum_offload(adapter->tp, 1);  /* for TSO only */
        t1_tp_set_tcp_checksum_offload(adapter->tp, 1);
}

/*
 * Things to do upon first use of a card.
 * This must run with the rtnl lock held.
 */
static int cxgb_up(struct adapter *adapter)
{
        int err = 0;

        if (!(adapter->flags & FULL_INIT_DONE)) {
                err = t1_init_hw_modules(adapter);
                if (err)
                        goto out_err;

                enable_hw_csum(adapter);
                adapter->flags |= FULL_INIT_DONE;
        }

        t1_interrupts_clear(adapter);

        adapter->params.has_msi = !disable_msi && !pci_enable_msi(adapter->pdev);
        err = request_threaded_irq(adapter->pdev->irq, t1_interrupt,
                                   t1_interrupt_thread,
                                   adapter->params.has_msi ? 0 : IRQF_SHARED,
                                   adapter->name, adapter);
        if (err) {
                if (adapter->params.has_msi)
                        pci_disable_msi(adapter->pdev);

                goto out_err;
        }

        t1_sge_start(adapter->sge);
        t1_interrupts_enable(adapter);
out_err:
        return err;
}

/*
 * Release resources when all the ports have been stopped.
 */
static void cxgb_down(struct adapter *adapter)
{
        t1_sge_stop(adapter->sge);
        t1_interrupts_disable(adapter);
        free_irq(adapter->pdev->irq, adapter);
        if (adapter->params.has_msi)
                pci_disable_msi(adapter->pdev);
}

static int cxgb_open(struct net_device *dev)
{
        int err;
        struct adapter *adapter = dev->ml_priv;
        int other_ports = adapter->open_device_map & PORT_MASK;

        napi_enable(&adapter->napi);
        if (!adapter->open_device_map && (err = cxgb_up(adapter)) < 0) {
                napi_disable(&adapter->napi);
                return err;
        }

        __set_bit(dev->if_port, &adapter->open_device_map);
        link_start(&adapter->port[dev->if_port]);
        netif_start_queue(dev);
        if (!other_ports && adapter->params.stats_update_period)
                schedule_mac_stats_update(adapter,
                                          adapter->params.stats_update_period);

        t1_vlan_mode(adapter, dev->features);
        return 0;
}

static int cxgb_close(struct net_device *dev)
{
        struct adapter *adapter = dev->ml_priv;
        struct port_info *p = &adapter->port[dev->if_port];
        struct cmac *mac = p->mac;

        netif_stop_queue(dev);
        napi_disable(&adapter->napi);
        mac->ops->disable(mac, MAC_DIRECTION_TX | MAC_DIRECTION_RX);
        netif_carrier_off(dev);

        clear_bit(dev->if_port, &adapter->open_device_map);
        if (adapter->params.stats_update_period &&
            !(adapter->open_device_map & PORT_MASK)) {
                /* Stop statistics accumulation. */
                smp_mb__after_atomic();
                spin_lock(&adapter->work_lock);   /* sync with update task */
                spin_unlock(&adapter->work_lock);
                cancel_mac_stats_update(adapter);
        }

        if (!adapter->open_device_map)
                cxgb_down(adapter);
        return 0;
}

static struct net_device_stats *t1_get_stats(struct net_device *dev)
{
        struct adapter *adapter = dev->ml_priv;
        struct port_info *p = &adapter->port[dev->if_port];
        struct net_device_stats *ns = &dev->stats;
        const struct cmac_statistics *pstats;

        /* Do a full update of the MAC stats */
        pstats = p->mac->ops->statistics_update(p->mac,
                                                MAC_STATS_UPDATE_FULL);

        ns->tx_packets = pstats->TxUnicastFramesOK +
                pstats->TxMulticastFramesOK + pstats->TxBroadcastFramesOK;

        ns->rx_packets = pstats->RxUnicastFramesOK +
                pstats->RxMulticastFramesOK + pstats->RxBroadcastFramesOK;

        ns->tx_bytes = pstats->TxOctetsOK;
        ns->rx_bytes = pstats->RxOctetsOK;

        ns->tx_errors = pstats->TxLateCollisions + pstats->TxLengthErrors +
                pstats->TxUnderrun + pstats->TxFramesAbortedDueToXSCollisions;
        ns->rx_errors = pstats->RxDataErrors + pstats->RxJabberErrors +
                pstats->RxFCSErrors + pstats->RxAlignErrors +
                pstats->RxSequenceErrors + pstats->RxFrameTooLongErrors +
                pstats->RxSymbolErrors + pstats->RxRuntErrors;

        ns->multicast  = pstats->RxMulticastFramesOK;
        ns->collisions = pstats->TxTotalCollisions;

        /* detailed rx_errors */
        ns->rx_length_errors = pstats->RxFrameTooLongErrors +
                pstats->RxJabberErrors;
        ns->rx_over_errors   = 0;
        ns->rx_crc_errors    = pstats->RxFCSErrors;
        ns->rx_frame_errors  = pstats->RxAlignErrors;
        ns->rx_fifo_errors   = 0;
        ns->rx_missed_errors = 0;

        /* detailed tx_errors */
        ns->tx_aborted_errors   = pstats->TxFramesAbortedDueToXSCollisions;
        ns->tx_carrier_errors   = 0;
        ns->tx_fifo_errors      = pstats->TxUnderrun;
        ns->tx_heartbeat_errors = 0;
        ns->tx_window_errors    = pstats->TxLateCollisions;
        return ns;
}

static u32 get_msglevel(struct net_device *dev)
{
        struct adapter *adapter = dev->ml_priv;

        return adapter->msg_enable;
}

static void set_msglevel(struct net_device *dev, u32 val)
{
        struct adapter *adapter = dev->ml_priv;

        adapter->msg_enable = val;
}

static const char stats_strings[][ETH_GSTRING_LEN] __nonstring_array = {
        "TxOctetsOK",
        "TxOctetsBad",
        "TxUnicastFramesOK",
        "TxMulticastFramesOK",
        "TxBroadcastFramesOK",
        "TxPauseFrames",
        "TxFramesWithDeferredXmissions",
        "TxLateCollisions",
        "TxTotalCollisions",
        "TxFramesAbortedDueToXSCollisions",
        "TxUnderrun",
        "TxLengthErrors",
        "TxInternalMACXmitError",
        "TxFramesWithExcessiveDeferral",
        "TxFCSErrors",
        "TxJumboFramesOk",
        "TxJumboOctetsOk",
        
        "RxOctetsOK",
        "RxOctetsBad",
        "RxUnicastFramesOK",
        "RxMulticastFramesOK",
        "RxBroadcastFramesOK",
        "RxPauseFrames",
        "RxFCSErrors",
        "RxAlignErrors",
        "RxSymbolErrors",
        "RxDataErrors",
        "RxSequenceErrors",
        "RxRuntErrors",
        "RxJabberErrors",
        "RxInternalMACRcvError",
        "RxInRangeLengthErrors",
        "RxOutOfRangeLengthField",
        "RxFrameTooLongErrors",
        "RxJumboFramesOk",
        "RxJumboOctetsOk",

        /* Port stats */
        "RxCsumGood",
        "TxCsumOffload",
        "TxTso",
        "RxVlan",
        "TxVlan",
        "TxNeedHeadroom", 
        
        /* Interrupt stats */
        "rx drops",
        "pure_rsps",
        "unhandled irqs",
        "respQ_empty",
        "respQ_overflow",
        "freelistQ_empty",
        "pkt_too_big",
        "pkt_mismatch",
        "cmdQ_full0",
        "cmdQ_full1",

        "espi_DIP2ParityErr",
        "espi_DIP4Err",
        "espi_RxDrops",
        "espi_TxDrops",
        "espi_RxOvfl",
        "espi_ParityErr"
};

#define T2_REGMAP_SIZE (3 * 1024)

static int get_regs_len(struct net_device *dev)
{
        return T2_REGMAP_SIZE;
}

static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
        struct adapter *adapter = dev->ml_priv;

        strscpy(info->driver, DRV_NAME, sizeof(info->driver));
        strscpy(info->bus_info, pci_name(adapter->pdev),
                sizeof(info->bus_info));
}

static int get_sset_count(struct net_device *dev, int sset)
{
        switch (sset) {
        case ETH_SS_STATS:
                return ARRAY_SIZE(stats_strings);
        default:
                return -EOPNOTSUPP;
        }
}

static void get_strings(struct net_device *dev, u32 stringset, u8 *data)
{
        if (stringset == ETH_SS_STATS)
                memcpy(data, stats_strings, sizeof(stats_strings));
}

static void get_stats(struct net_device *dev, struct ethtool_stats *stats,
                      u64 *data)
{
        struct adapter *adapter = dev->ml_priv;
        struct cmac *mac = adapter->port[dev->if_port].mac;
        const struct cmac_statistics *s;
        const struct sge_intr_counts *t;
        struct sge_port_stats ss;

        s = mac->ops->statistics_update(mac, MAC_STATS_UPDATE_FULL);
        t = t1_sge_get_intr_counts(adapter->sge);
        t1_sge_get_port_stats(adapter->sge, dev->if_port, &ss);

        *data++ = s->TxOctetsOK;
        *data++ = s->TxOctetsBad;
        *data++ = s->TxUnicastFramesOK;
        *data++ = s->TxMulticastFramesOK;
        *data++ = s->TxBroadcastFramesOK;
        *data++ = s->TxPauseFrames;
        *data++ = s->TxFramesWithDeferredXmissions;
        *data++ = s->TxLateCollisions;
        *data++ = s->TxTotalCollisions;
        *data++ = s->TxFramesAbortedDueToXSCollisions;
        *data++ = s->TxUnderrun;
        *data++ = s->TxLengthErrors;
        *data++ = s->TxInternalMACXmitError;
        *data++ = s->TxFramesWithExcessiveDeferral;
        *data++ = s->TxFCSErrors;
        *data++ = s->TxJumboFramesOK;
        *data++ = s->TxJumboOctetsOK;

        *data++ = s->RxOctetsOK;
        *data++ = s->RxOctetsBad;
        *data++ = s->RxUnicastFramesOK;
        *data++ = s->RxMulticastFramesOK;
        *data++ = s->RxBroadcastFramesOK;
        *data++ = s->RxPauseFrames;
        *data++ = s->RxFCSErrors;
        *data++ = s->RxAlignErrors;
        *data++ = s->RxSymbolErrors;
        *data++ = s->RxDataErrors;
        *data++ = s->RxSequenceErrors;
        *data++ = s->RxRuntErrors;
        *data++ = s->RxJabberErrors;
        *data++ = s->RxInternalMACRcvError;
        *data++ = s->RxInRangeLengthErrors;
        *data++ = s->RxOutOfRangeLengthField;
        *data++ = s->RxFrameTooLongErrors;
        *data++ = s->RxJumboFramesOK;
        *data++ = s->RxJumboOctetsOK;

        *data++ = ss.rx_cso_good;
        *data++ = ss.tx_cso;
        *data++ = ss.tx_tso;
        *data++ = ss.vlan_xtract;
        *data++ = ss.vlan_insert;
        *data++ = ss.tx_need_hdrroom;
        
        *data++ = t->rx_drops;
        *data++ = t->pure_rsps;
        *data++ = t->unhandled_irqs;
        *data++ = t->respQ_empty;
        *data++ = t->respQ_overflow;
        *data++ = t->freelistQ_empty;
        *data++ = t->pkt_too_big;
        *data++ = t->pkt_mismatch;
        *data++ = t->cmdQ_full[0];
        *data++ = t->cmdQ_full[1];

        if (adapter->espi) {
                const struct espi_intr_counts *e;

                e = t1_espi_get_intr_counts(adapter->espi);
                *data++ = e->DIP2_parity_err;
                *data++ = e->DIP4_err;
                *data++ = e->rx_drops;
                *data++ = e->tx_drops;
                *data++ = e->rx_ovflw;
                *data++ = e->parity_err;
        }
}

static inline void reg_block_dump(struct adapter *ap, void *buf,
                                  unsigned int start, unsigned int end)
{
        u32 *p = buf + start;

        for ( ; start <= end; start += sizeof(u32))
                *p++ = readl(ap->regs + start);
}

static void get_regs(struct net_device *dev, struct ethtool_regs *regs,
                     void *buf)
{
        struct adapter *ap = dev->ml_priv;

        /*
         * Version scheme: bits 0..9: chip version, bits 10..15: chip revision
         */
        regs->version = 2;

        memset(buf, 0, T2_REGMAP_SIZE);
        reg_block_dump(ap, buf, 0, A_SG_RESPACCUTIMER);
        reg_block_dump(ap, buf, A_MC3_CFG, A_MC4_INT_CAUSE);
        reg_block_dump(ap, buf, A_TPI_ADDR, A_TPI_PAR);
        reg_block_dump(ap, buf, A_TP_IN_CONFIG, A_TP_TX_DROP_COUNT);
        reg_block_dump(ap, buf, A_RAT_ROUTE_CONTROL, A_RAT_INTR_CAUSE);
        reg_block_dump(ap, buf, A_CSPI_RX_AE_WM, A_CSPI_INTR_ENABLE);
        reg_block_dump(ap, buf, A_ESPI_SCH_TOKEN0, A_ESPI_GOSTAT);
        reg_block_dump(ap, buf, A_ULP_ULIMIT, A_ULP_PIO_CTRL);
        reg_block_dump(ap, buf, A_PL_ENABLE, A_PL_CAUSE);
        reg_block_dump(ap, buf, A_MC5_CONFIG, A_MC5_MASK_WRITE_CMD);
}

static int get_link_ksettings(struct net_device *dev,
                              struct ethtool_link_ksettings *cmd)
{
        struct adapter *adapter = dev->ml_priv;
        struct port_info *p = &adapter->port[dev->if_port];
        u32 supported, advertising;

        supported = p->link_config.supported;
        advertising = p->link_config.advertising;

        if (netif_carrier_ok(dev)) {
                cmd->base.speed = p->link_config.speed;
                cmd->base.duplex = p->link_config.duplex;
        } else {
                cmd->base.speed = SPEED_UNKNOWN;
                cmd->base.duplex = DUPLEX_UNKNOWN;
        }

        cmd->base.port = (supported & SUPPORTED_TP) ? PORT_TP : PORT_FIBRE;
        cmd->base.phy_address = p->phy->mdio.prtad;
        cmd->base.autoneg = p->link_config.autoneg;

        ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
                                                supported);
        ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
                                                advertising);

        return 0;
}

static int speed_duplex_to_caps(int speed, int duplex)
{
        int cap = 0;

        switch (speed) {
        case SPEED_10:
                if (duplex == DUPLEX_FULL)
                        cap = SUPPORTED_10baseT_Full;
                else
                        cap = SUPPORTED_10baseT_Half;
                break;
        case SPEED_100:
                if (duplex == DUPLEX_FULL)
                        cap = SUPPORTED_100baseT_Full;
                else
                        cap = SUPPORTED_100baseT_Half;
                break;
        case SPEED_1000:
                if (duplex == DUPLEX_FULL)
                        cap = SUPPORTED_1000baseT_Full;
                else
                        cap = SUPPORTED_1000baseT_Half;
                break;
        case SPEED_10000:
                if (duplex == DUPLEX_FULL)
                        cap = SUPPORTED_10000baseT_Full;
        }
        return cap;
}

#define ADVERTISED_MASK (ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full | \
                      ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full | \
                      ADVERTISED_1000baseT_Half | ADVERTISED_1000baseT_Full | \
                      ADVERTISED_10000baseT_Full)

static int set_link_ksettings(struct net_device *dev,
                              const struct ethtool_link_ksettings *cmd)
{
        struct adapter *adapter = dev->ml_priv;
        struct port_info *p = &adapter->port[dev->if_port];
        struct link_config *lc = &p->link_config;
        u32 advertising;

        ethtool_convert_link_mode_to_legacy_u32(&advertising,
                                                cmd->link_modes.advertising);

        if (!(lc->supported & SUPPORTED_Autoneg))
                return -EOPNOTSUPP;             /* can't change speed/duplex */

        if (cmd->base.autoneg == AUTONEG_DISABLE) {
                u32 speed = cmd->base.speed;
                int cap = speed_duplex_to_caps(speed, cmd->base.duplex);

                if (!(lc->supported & cap) || (speed == SPEED_1000))
                        return -EINVAL;
                lc->requested_speed = speed;
                lc->requested_duplex = cmd->base.duplex;
                lc->advertising = 0;
        } else {
                advertising &= ADVERTISED_MASK;
                if (advertising & (advertising - 1))
                        advertising = lc->supported;
                advertising &= lc->supported;
                if (!advertising)
                        return -EINVAL;
                lc->requested_speed = SPEED_INVALID;
                lc->requested_duplex = DUPLEX_INVALID;
                lc->advertising = advertising | ADVERTISED_Autoneg;
        }
        lc->autoneg = cmd->base.autoneg;
        if (netif_running(dev))
                t1_link_start(p->phy, p->mac, lc);
        return 0;
}

static void get_pauseparam(struct net_device *dev,
                           struct ethtool_pauseparam *epause)
{
        struct adapter *adapter = dev->ml_priv;
        struct port_info *p = &adapter->port[dev->if_port];

        epause->autoneg = (p->link_config.requested_fc & PAUSE_AUTONEG) != 0;
        epause->rx_pause = (p->link_config.fc & PAUSE_RX) != 0;
        epause->tx_pause = (p->link_config.fc & PAUSE_TX) != 0;
}

static int set_pauseparam(struct net_device *dev,
                          struct ethtool_pauseparam *epause)
{
        struct adapter *adapter = dev->ml_priv;
        struct port_info *p = &adapter->port[dev->if_port];
        struct link_config *lc = &p->link_config;

        if (epause->autoneg == AUTONEG_DISABLE)
                lc->requested_fc = 0;
        else if (lc->supported & SUPPORTED_Autoneg)
                lc->requested_fc = PAUSE_AUTONEG;
        else
                return -EINVAL;

        if (epause->rx_pause)
                lc->requested_fc |= PAUSE_RX;
        if (epause->tx_pause)
                lc->requested_fc |= PAUSE_TX;
        if (lc->autoneg == AUTONEG_ENABLE) {
                if (netif_running(dev))
                        t1_link_start(p->phy, p->mac, lc);
        } else {
                lc->fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);
                if (netif_running(dev))
                        p->mac->ops->set_speed_duplex_fc(p->mac, -1, -1,
                                                         lc->fc);
        }
        return 0;
}

static void get_sge_param(struct net_device *dev, struct ethtool_ringparam *e,
                          struct kernel_ethtool_ringparam *kernel_e,
                          struct netlink_ext_ack *extack)
{
        struct adapter *adapter = dev->ml_priv;
        int jumbo_fl = t1_is_T1B(adapter) ? 1 : 0;

        e->rx_max_pending = MAX_RX_BUFFERS;
        e->rx_jumbo_max_pending = MAX_RX_JUMBO_BUFFERS;
        e->tx_max_pending = MAX_CMDQ_ENTRIES;

        e->rx_pending = adapter->params.sge.freelQ_size[!jumbo_fl];
        e->rx_jumbo_pending = adapter->params.sge.freelQ_size[jumbo_fl];
        e->tx_pending = adapter->params.sge.cmdQ_size[0];
}

static int set_sge_param(struct net_device *dev, struct ethtool_ringparam *e,
                         struct kernel_ethtool_ringparam *kernel_e,
                         struct netlink_ext_ack *extack)
{
        struct adapter *adapter = dev->ml_priv;
        int jumbo_fl = t1_is_T1B(adapter) ? 1 : 0;

        if (e->rx_pending > MAX_RX_BUFFERS || e->rx_mini_pending ||
            e->rx_jumbo_pending > MAX_RX_JUMBO_BUFFERS ||
            e->tx_pending > MAX_CMDQ_ENTRIES ||
            e->rx_pending < MIN_FL_ENTRIES ||
            e->rx_jumbo_pending < MIN_FL_ENTRIES ||
            e->tx_pending < (adapter->params.nports + 1) * (MAX_SKB_FRAGS + 1))
                return -EINVAL;

        if (adapter->flags & FULL_INIT_DONE)
                return -EBUSY;

        adapter->params.sge.freelQ_size[!jumbo_fl] = e->rx_pending;
        adapter->params.sge.freelQ_size[jumbo_fl] = e->rx_jumbo_pending;
        adapter->params.sge.cmdQ_size[0] = e->tx_pending;
        adapter->params.sge.cmdQ_size[1] = e->tx_pending > MAX_CMDQ1_ENTRIES ?
                MAX_CMDQ1_ENTRIES : e->tx_pending;
        return 0;
}

static int set_coalesce(struct net_device *dev, struct ethtool_coalesce *c,
                        struct kernel_ethtool_coalesce *kernel_coal,
                        struct netlink_ext_ack *extack)
{
        struct adapter *adapter = dev->ml_priv;

        adapter->params.sge.rx_coalesce_usecs = c->rx_coalesce_usecs;
        adapter->params.sge.coalesce_enable = c->use_adaptive_rx_coalesce;
        adapter->params.sge.sample_interval_usecs = c->rate_sample_interval;
        t1_sge_set_coalesce_params(adapter->sge, &adapter->params.sge);
        return 0;
}

static int get_coalesce(struct net_device *dev, struct ethtool_coalesce *c,
                        struct kernel_ethtool_coalesce *kernel_coal,
                        struct netlink_ext_ack *extack)
{
        struct adapter *adapter = dev->ml_priv;

        c->rx_coalesce_usecs = adapter->params.sge.rx_coalesce_usecs;
        c->rate_sample_interval = adapter->params.sge.sample_interval_usecs;
        c->use_adaptive_rx_coalesce = adapter->params.sge.coalesce_enable;
        return 0;
}

static int get_eeprom_len(struct net_device *dev)
{
        struct adapter *adapter = dev->ml_priv;

        return t1_is_asic(adapter) ? EEPROM_SIZE : 0;
}

#define EEPROM_MAGIC(ap) \
        (PCI_VENDOR_ID_CHELSIO | ((ap)->params.chip_version << 16))

static int get_eeprom(struct net_device *dev, struct ethtool_eeprom *e,
                      u8 *data)
{
        int i;
        u8 buf[EEPROM_SIZE] __attribute__((aligned(4)));
        struct adapter *adapter = dev->ml_priv;

        e->magic = EEPROM_MAGIC(adapter);
        for (i = e->offset & ~3; i < e->offset + e->len; i += sizeof(u32))
                t1_seeprom_read(adapter, i, (__le32 *)&buf[i]);
        memcpy(data, buf + e->offset, e->len);
        return 0;
}

static const struct ethtool_ops t1_ethtool_ops = {
        .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
                                     ETHTOOL_COALESCE_USE_ADAPTIVE_RX |
                                     ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL,
        .get_drvinfo       = get_drvinfo,
        .get_msglevel      = get_msglevel,
        .set_msglevel      = set_msglevel,
        .get_ringparam     = get_sge_param,
        .set_ringparam     = set_sge_param,
        .get_coalesce      = get_coalesce,
        .set_coalesce      = set_coalesce,
        .get_eeprom_len    = get_eeprom_len,
        .get_eeprom        = get_eeprom,
        .get_pauseparam    = get_pauseparam,
        .set_pauseparam    = set_pauseparam,
        .get_link          = ethtool_op_get_link,
        .get_strings       = get_strings,
        .get_sset_count    = get_sset_count,
        .get_ethtool_stats = get_stats,
        .get_regs_len      = get_regs_len,
        .get_regs          = get_regs,
        .get_link_ksettings = get_link_ksettings,
        .set_link_ksettings = set_link_ksettings,
};

static int t1_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
{
        struct adapter *adapter = dev->ml_priv;
        struct mdio_if_info *mdio = &adapter->port[dev->if_port].phy->mdio;

        return mdio_mii_ioctl(mdio, if_mii(req), cmd);
}

static int t1_change_mtu(struct net_device *dev, int new_mtu)
{
        int ret;
        struct adapter *adapter = dev->ml_priv;
        struct cmac *mac = adapter->port[dev->if_port].mac;

        if (!mac->ops->set_mtu)
                return -EOPNOTSUPP;
        if ((ret = mac->ops->set_mtu(mac, new_mtu)))
                return ret;
        WRITE_ONCE(dev->mtu, new_mtu);
        return 0;
}

static int t1_set_mac_addr(struct net_device *dev, void *p)
{
        struct adapter *adapter = dev->ml_priv;
        struct cmac *mac = adapter->port[dev->if_port].mac;
        struct sockaddr *addr = p;

        if (!mac->ops->macaddress_set)
                return -EOPNOTSUPP;

        eth_hw_addr_set(dev, addr->sa_data);
        mac->ops->macaddress_set(mac, dev->dev_addr);
        return 0;
}

static netdev_features_t t1_fix_features(struct net_device *dev,
        netdev_features_t features)
{
        /*
         * Since there is no support for separate rx/tx vlan accel
         * enable/disable make sure tx flag is always in same state as rx.
         */
        if (features & NETIF_F_HW_VLAN_CTAG_RX)
                features |= NETIF_F_HW_VLAN_CTAG_TX;
        else
                features &= ~NETIF_F_HW_VLAN_CTAG_TX;

        return features;
}

static int t1_set_features(struct net_device *dev, netdev_features_t features)
{
        netdev_features_t changed = dev->features ^ features;
        struct adapter *adapter = dev->ml_priv;

        if (changed & NETIF_F_HW_VLAN_CTAG_RX)
                t1_vlan_mode(adapter, features);

        return 0;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void t1_netpoll(struct net_device *dev)
{
        unsigned long flags;
        struct adapter *adapter = dev->ml_priv;

        local_irq_save(flags);
        t1_interrupt(adapter->pdev->irq, adapter);
        local_irq_restore(flags);
}
#endif

/*
 * Periodic accumulation of MAC statistics.  This is used only if the MAC
 * does not have any other way to prevent stats counter overflow.
 */
static void mac_stats_task(struct work_struct *work)
{
        int i;
        struct adapter *adapter =
                container_of(work, struct adapter, stats_update_task.work);

        for_each_port(adapter, i) {
                struct port_info *p = &adapter->port[i];

                if (netif_running(p->dev))
                        p->mac->ops->statistics_update(p->mac,
                                                       MAC_STATS_UPDATE_FAST);
        }

        /* Schedule the next statistics update if any port is active. */
        spin_lock(&adapter->work_lock);
        if (adapter->open_device_map & PORT_MASK)
                schedule_mac_stats_update(adapter,
                                          adapter->params.stats_update_period);
        spin_unlock(&adapter->work_lock);
}

static const struct net_device_ops cxgb_netdev_ops = {
        .ndo_open               = cxgb_open,
        .ndo_stop               = cxgb_close,
        .ndo_start_xmit         = t1_start_xmit,
        .ndo_get_stats          = t1_get_stats,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_set_rx_mode        = t1_set_rxmode,
        .ndo_eth_ioctl          = t1_ioctl,
        .ndo_change_mtu         = t1_change_mtu,
        .ndo_set_mac_address    = t1_set_mac_addr,
        .ndo_fix_features       = t1_fix_features,
        .ndo_set_features       = t1_set_features,
#ifdef CONFIG_NET_POLL_CONTROLLER
        .ndo_poll_controller    = t1_netpoll,
#endif
};

static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        unsigned long mmio_start, mmio_len;
        const struct board_info *bi;
        struct adapter *adapter = NULL;
        struct port_info *pi;
        int i, err;

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

        if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
                pr_err("%s: cannot find PCI device memory base address\n",
                       pci_name(pdev));
                err = -ENODEV;
                goto out_disable_pdev;
        }

        err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
        if (err) {
                pr_err("%s: no usable DMA configuration\n", pci_name(pdev));
                goto out_disable_pdev;
        }

        err = pci_request_regions(pdev, DRV_NAME);
        if (err) {
                pr_err("%s: cannot obtain PCI resources\n", pci_name(pdev));
                goto out_disable_pdev;
        }

        pci_set_master(pdev);

        mmio_start = pci_resource_start(pdev, 0);
        mmio_len = pci_resource_len(pdev, 0);
        bi = t1_get_board_info(ent->driver_data);

        for (i = 0; i < bi->port_number; ++i) {
                struct net_device *netdev;

                netdev = alloc_etherdev(adapter ? 0 : sizeof(*adapter));
                if (!netdev) {
                        err = -ENOMEM;
                        goto out_free_dev;
                }

                SET_NETDEV_DEV(netdev, &pdev->dev);

                if (!adapter) {
                        adapter = netdev_priv(netdev);
                        adapter->pdev = pdev;
                        adapter->port[0].dev = netdev;  /* so we don't leak it */

                        adapter->regs = ioremap(mmio_start, mmio_len);
                        if (!adapter->regs) {
                                pr_err("%s: cannot map device registers\n",
                                       pci_name(pdev));
                                err = -ENOMEM;
                                goto out_free_dev;
                        }

                        if (t1_get_board_rev(adapter, bi, &adapter->params)) {
                                err = -ENODEV;    /* Can't handle this chip rev */
                                goto out_free_dev;
                        }

                        adapter->name = pci_name(pdev);
                        adapter->msg_enable = dflt_msg_enable;
                        adapter->mmio_len = mmio_len;

                        spin_lock_init(&adapter->tpi_lock);
                        spin_lock_init(&adapter->work_lock);
                        spin_lock_init(&adapter->async_lock);
                        spin_lock_init(&adapter->mac_lock);

                        INIT_DELAYED_WORK(&adapter->stats_update_task,
                                          mac_stats_task);

                        pci_set_drvdata(pdev, netdev);
                }

                pi = &adapter->port[i];
                pi->dev = netdev;
                netif_carrier_off(netdev);
                netdev->irq = pdev->irq;
                netdev->if_port = i;
                netdev->mem_start = mmio_start;
                netdev->mem_end = mmio_start + mmio_len - 1;
                netdev->ml_priv = adapter;
                netdev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM |
                        NETIF_F_RXCSUM;
                netdev->features |= NETIF_F_SG | NETIF_F_IP_CSUM |
                        NETIF_F_RXCSUM | NETIF_F_HIGHDMA;
                netdev->lltx = true;

                if (vlan_tso_capable(adapter)) {
                        netdev->features |=
                                NETIF_F_HW_VLAN_CTAG_TX |
                                NETIF_F_HW_VLAN_CTAG_RX;
                        netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;

                        /* T204: disable TSO */
                        if (!(is_T2(adapter)) || bi->port_number != 4) {
                                netdev->hw_features |= NETIF_F_TSO;
                                netdev->features |= NETIF_F_TSO;
                        }
                }

                netdev->netdev_ops = &cxgb_netdev_ops;
                netdev->hard_header_len += (netdev->hw_features & NETIF_F_TSO) ?
                        sizeof(struct cpl_tx_pkt_lso) : sizeof(struct cpl_tx_pkt);

                netif_napi_add(netdev, &adapter->napi, t1_poll);

                netdev->ethtool_ops = &t1_ethtool_ops;

                switch (bi->board) {
                case CHBT_BOARD_CHT110:
                case CHBT_BOARD_N110:
                case CHBT_BOARD_N210:
                case CHBT_BOARD_CHT210:
                        netdev->max_mtu = PM3393_MAX_FRAME_SIZE -
                                          (ETH_HLEN + ETH_FCS_LEN);
                        break;
                case CHBT_BOARD_CHN204:
                        netdev->max_mtu = VSC7326_MAX_MTU;
                        break;
                default:
                        netdev->max_mtu = ETH_DATA_LEN;
                        break;
                }
        }

        if (t1_init_sw_modules(adapter, bi) < 0) {
                err = -ENODEV;
                goto out_free_dev;
        }

        /*
         * The card is now ready to go.  If any errors occur during device
         * registration we do not fail the whole card but rather proceed only
         * with the ports we manage to register successfully.  However we must
         * register at least one net device.
         */
        for (i = 0; i < bi->port_number; ++i) {
                err = register_netdev(adapter->port[i].dev);
                if (err)
                        pr_warn("%s: cannot register net device %s, skipping\n",
                                pci_name(pdev), adapter->port[i].dev->name);
                else {
                        /*
                         * Change the name we use for messages to the name of
                         * the first successfully registered interface.
                         */
                        if (!adapter->registered_device_map)
                                adapter->name = adapter->port[i].dev->name;

                        __set_bit(i, &adapter->registered_device_map);
                }
        }
        if (!adapter->registered_device_map) {
                pr_err("%s: could not register any net devices\n",
                       pci_name(pdev));
                err = -EINVAL;
                goto out_release_adapter_res;
        }

        pr_info("%s: %s (rev %d), %s %dMHz/%d-bit\n",
                adapter->name, bi->desc, adapter->params.chip_revision,
                adapter->params.pci.is_pcix ? "PCIX" : "PCI",
                adapter->params.pci.speed, adapter->params.pci.width);

        /*
         * Set the T1B ASIC and memory clocks.
         */
        if (t1powersave)
                adapter->t1powersave = LCLOCK;  /* HW default is powersave mode. */
        else
                adapter->t1powersave = HCLOCK;
        if (t1_is_T1B(adapter))
                t1_clock(adapter, t1powersave);

        return 0;

out_release_adapter_res:
        t1_free_sw_modules(adapter);
out_free_dev:
        if (adapter) {
                if (adapter->regs)
                        iounmap(adapter->regs);
                for (i = bi->port_number - 1; i >= 0; --i)
                        if (adapter->port[i].dev)
                                free_netdev(adapter->port[i].dev);
        }
        pci_release_regions(pdev);
out_disable_pdev:
        pci_disable_device(pdev);
        return err;
}

static void bit_bang(struct adapter *adapter, int bitdata, int nbits)
{
        int data;
        int i;
        u32 val;

        enum {
                S_CLOCK = 1 << 3,
                S_DATA = 1 << 4
        };

        for (i = (nbits - 1); i > -1; i--) {

                udelay(50);

                data = ((bitdata >> i) & 0x1);
                __t1_tpi_read(adapter, A_ELMER0_GPO, &val);

                if (data)
                        val |= S_DATA;
                else
                        val &= ~S_DATA;

                udelay(50);

                /* Set SCLOCK low */
                val &= ~S_CLOCK;
                __t1_tpi_write(adapter, A_ELMER0_GPO, val);

                udelay(50);

                /* Write SCLOCK high */
                val |= S_CLOCK;
                __t1_tpi_write(adapter, A_ELMER0_GPO, val);

        }
}

static int t1_clock(struct adapter *adapter, int mode)
{
        u32 val;
        int M_CORE_VAL;
        int M_MEM_VAL;

        enum {
                M_CORE_BITS     = 9,
                T_CORE_VAL      = 0,
                T_CORE_BITS     = 2,
                N_CORE_VAL      = 0,
                N_CORE_BITS     = 2,
                M_MEM_BITS      = 9,
                T_MEM_VAL       = 0,
                T_MEM_BITS      = 2,
                N_MEM_VAL       = 0,
                N_MEM_BITS      = 2,
                NP_LOAD         = 1 << 17,
                S_LOAD_MEM      = 1 << 5,
                S_LOAD_CORE     = 1 << 6,
                S_CLOCK         = 1 << 3
        };

        if (!t1_is_T1B(adapter))
                return -ENODEV; /* Can't re-clock this chip. */

        if (mode & 2)
                return 0;       /* show current mode. */

        if ((adapter->t1powersave & 1) == (mode & 1))
                return -EALREADY;       /* ASIC already running in mode. */

        if ((mode & 1) == HCLOCK) {
                M_CORE_VAL = 0x14;
                M_MEM_VAL = 0x18;
                adapter->t1powersave = HCLOCK;  /* overclock */
        } else {
                M_CORE_VAL = 0xe;
                M_MEM_VAL = 0x10;
                adapter->t1powersave = LCLOCK;  /* underclock */
        }

        /* Don't interrupt this serial stream! */
        spin_lock(&adapter->tpi_lock);

        /* Initialize for ASIC core */
        __t1_tpi_read(adapter, A_ELMER0_GPO, &val);
        val |= NP_LOAD;
        udelay(50);
        __t1_tpi_write(adapter, A_ELMER0_GPO, val);
        udelay(50);
        __t1_tpi_read(adapter, A_ELMER0_GPO, &val);
        val &= ~S_LOAD_CORE;
        val &= ~S_CLOCK;
        __t1_tpi_write(adapter, A_ELMER0_GPO, val);
        udelay(50);

        /* Serial program the ASIC clock synthesizer */
        bit_bang(adapter, T_CORE_VAL, T_CORE_BITS);
        bit_bang(adapter, N_CORE_VAL, N_CORE_BITS);
        bit_bang(adapter, M_CORE_VAL, M_CORE_BITS);
        udelay(50);

        /* Finish ASIC core */
        __t1_tpi_read(adapter, A_ELMER0_GPO, &val);
        val |= S_LOAD_CORE;
        udelay(50);
        __t1_tpi_write(adapter, A_ELMER0_GPO, val);
        udelay(50);
        __t1_tpi_read(adapter, A_ELMER0_GPO, &val);
        val &= ~S_LOAD_CORE;
        udelay(50);
        __t1_tpi_write(adapter, A_ELMER0_GPO, val);
        udelay(50);

        /* Initialize for memory */
        __t1_tpi_read(adapter, A_ELMER0_GPO, &val);
        val |= NP_LOAD;
        udelay(50);
        __t1_tpi_write(adapter, A_ELMER0_GPO, val);
        udelay(50);
        __t1_tpi_read(adapter, A_ELMER0_GPO, &val);
        val &= ~S_LOAD_MEM;
        val &= ~S_CLOCK;
        udelay(50);
        __t1_tpi_write(adapter, A_ELMER0_GPO, val);
        udelay(50);

        /* Serial program the memory clock synthesizer */
        bit_bang(adapter, T_MEM_VAL, T_MEM_BITS);
        bit_bang(adapter, N_MEM_VAL, N_MEM_BITS);
        bit_bang(adapter, M_MEM_VAL, M_MEM_BITS);
        udelay(50);

        /* Finish memory */
        __t1_tpi_read(adapter, A_ELMER0_GPO, &val);
        val |= S_LOAD_MEM;
        udelay(50);
        __t1_tpi_write(adapter, A_ELMER0_GPO, val);
        udelay(50);
        __t1_tpi_read(adapter, A_ELMER0_GPO, &val);
        val &= ~S_LOAD_MEM;
        udelay(50);
        __t1_tpi_write(adapter, A_ELMER0_GPO, val);

        spin_unlock(&adapter->tpi_lock);

        return 0;
}

static inline void t1_sw_reset(struct pci_dev *pdev)
{
        pci_write_config_dword(pdev, A_PCICFG_PM_CSR, 3);
        pci_write_config_dword(pdev, A_PCICFG_PM_CSR, 0);
}

static void remove_one(struct pci_dev *pdev)
{
        struct net_device *dev = pci_get_drvdata(pdev);
        struct adapter *adapter = dev->ml_priv;
        int i;

        for_each_port(adapter, i) {
                if (test_bit(i, &adapter->registered_device_map))
                        unregister_netdev(adapter->port[i].dev);
        }

        t1_free_sw_modules(adapter);
        iounmap(adapter->regs);

        while (--i >= 0) {
                if (adapter->port[i].dev)
                        free_netdev(adapter->port[i].dev);
        }

        pci_release_regions(pdev);
        pci_disable_device(pdev);
        t1_sw_reset(pdev);
}

static struct pci_driver cxgb_pci_driver = {
        .name     = DRV_NAME,
        .id_table = t1_pci_tbl,
        .probe    = init_one,
        .remove   = remove_one,
};

module_pci_driver(cxgb_pci_driver);