sfc: 10Xpress: Report support for pause frames

[linux-2.6.git] / drivers / net / sfc / tenxpress.c

/****************************************************************************
 * Driver for Solarflare Solarstorm network controllers and boards
 * Copyright 2007-2008 Solarflare Communications Inc.
 *
 * 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, incorporated herein by reference.
 */

#include <linux/delay.h>
#include <linux/rtnetlink.h>
#include <linux/seq_file.h>
#include "efx.h"
#include "mdio_10g.h"
#include "falcon.h"
#include "phy.h"
#include "falcon_hwdefs.h"
#include "boards.h"
#include "workarounds.h"
#include "selftest.h"

/* We expect these MMDs to be in the package.  SFT9001 also has a
 * clause 22 extension MMD, but since it doesn't have all the generic
 * MMD registers it is pointless to include it here.
 */
#define TENXPRESS_REQUIRED_DEVS (MDIO_DEVS_PMAPMD       | \
                                 MDIO_DEVS_PCS          | \
                                 MDIO_DEVS_PHYXS        | \
                                 MDIO_DEVS_AN)

#define SFX7101_LOOPBACKS ((1 << LOOPBACK_PHYXS) |      \
                           (1 << LOOPBACK_PCS) |        \
                           (1 << LOOPBACK_PMAPMD) |     \
                           (1 << LOOPBACK_NETWORK))

#define SFT9001_LOOPBACKS ((1 << LOOPBACK_GPHY) |       \
                           (1 << LOOPBACK_PHYXS) |      \
                           (1 << LOOPBACK_PCS) |        \
                           (1 << LOOPBACK_PMAPMD) |     \
                           (1 << LOOPBACK_NETWORK))

/* We complain if we fail to see the link partner as 10G capable this many
 * times in a row (must be > 1 as sampling the autoneg. registers is racy)
 */
#define MAX_BAD_LP_TRIES        (5)

/* Extended control register */
#define PMA_PMD_XCONTROL_REG    49152
#define PMA_PMD_EXT_GMII_EN_LBN 1
#define PMA_PMD_EXT_GMII_EN_WIDTH 1
#define PMA_PMD_EXT_CLK_OUT_LBN 2
#define PMA_PMD_EXT_CLK_OUT_WIDTH 1
#define PMA_PMD_LNPGA_POWERDOWN_LBN 8   /* SFX7101 only */
#define PMA_PMD_LNPGA_POWERDOWN_WIDTH 1
#define PMA_PMD_EXT_CLK312_LBN  8       /* SFT9001 only */
#define PMA_PMD_EXT_CLK312_WIDTH 1
#define PMA_PMD_EXT_LPOWER_LBN  12
#define PMA_PMD_EXT_LPOWER_WIDTH 1
#define PMA_PMD_EXT_ROBUST_LBN  14
#define PMA_PMD_EXT_ROBUST_WIDTH 1
#define PMA_PMD_EXT_SSR_LBN     15
#define PMA_PMD_EXT_SSR_WIDTH   1

/* extended status register */
#define PMA_PMD_XSTATUS_REG     49153
#define PMA_PMD_XSTAT_MDIX_LBN  14
#define PMA_PMD_XSTAT_FLP_LBN   (12)

/* LED control register */
#define PMA_PMD_LED_CTRL_REG    49159
#define PMA_PMA_LED_ACTIVITY_LBN        (3)

/* LED function override register */
#define PMA_PMD_LED_OVERR_REG   49161
/* Bit positions for different LEDs (there are more but not wired on SFE4001)*/
#define PMA_PMD_LED_LINK_LBN    (0)
#define PMA_PMD_LED_SPEED_LBN   (2)
#define PMA_PMD_LED_TX_LBN      (4)
#define PMA_PMD_LED_RX_LBN      (6)
/* Override settings */
#define PMA_PMD_LED_AUTO        (0)     /* H/W control */
#define PMA_PMD_LED_ON          (1)
#define PMA_PMD_LED_OFF         (2)
#define PMA_PMD_LED_FLASH       (3)
#define PMA_PMD_LED_MASK        3
/* All LEDs under hardware control */
#define PMA_PMD_LED_FULL_AUTO   (0)
/* Green and Amber under hardware control, Red off */
#define PMA_PMD_LED_DEFAULT     (PMA_PMD_LED_OFF << PMA_PMD_LED_RX_LBN)

#define PMA_PMD_SPEED_ENABLE_REG 49192
#define PMA_PMD_100TX_ADV_LBN    1
#define PMA_PMD_100TX_ADV_WIDTH  1
#define PMA_PMD_1000T_ADV_LBN    2
#define PMA_PMD_1000T_ADV_WIDTH  1
#define PMA_PMD_10000T_ADV_LBN   3
#define PMA_PMD_10000T_ADV_WIDTH 1
#define PMA_PMD_SPEED_LBN        4
#define PMA_PMD_SPEED_WIDTH      4

/* Cable diagnostics - SFT9001 only */
#define PMA_PMD_CDIAG_CTRL_REG  49213
#define CDIAG_CTRL_IMMED_LBN    15
#define CDIAG_CTRL_BRK_LINK_LBN 12
#define CDIAG_CTRL_IN_PROG_LBN  11
#define CDIAG_CTRL_LEN_UNIT_LBN 10
#define CDIAG_CTRL_LEN_METRES   1
#define PMA_PMD_CDIAG_RES_REG   49174
#define CDIAG_RES_A_LBN         12
#define CDIAG_RES_B_LBN         8
#define CDIAG_RES_C_LBN         4
#define CDIAG_RES_D_LBN         0
#define CDIAG_RES_WIDTH         4
#define CDIAG_RES_OPEN          2
#define CDIAG_RES_OK            1
#define CDIAG_RES_INVALID       0
/* Set of 4 registers for pairs A-D */
#define PMA_PMD_CDIAG_LEN_REG   49175

/* Serdes control registers - SFT9001 only */
#define PMA_PMD_CSERDES_CTRL_REG 64258
/* Set the 156.25 MHz output to 312.5 MHz to drive Falcon's XMAC */
#define PMA_PMD_CSERDES_DEFAULT 0x000f

/* Misc register defines - SFX7101 only */
#define PCS_CLOCK_CTRL_REG      55297
#define PLL312_RST_N_LBN 2

#define PCS_SOFT_RST2_REG       55302
#define SERDES_RST_N_LBN 13
#define XGXS_RST_N_LBN 12

#define PCS_TEST_SELECT_REG     55303   /* PRM 10.5.8 */
#define CLK312_EN_LBN 3

/* PHYXS registers */
#define PHYXS_XCONTROL_REG      49152
#define PHYXS_RESET_LBN         15
#define PHYXS_RESET_WIDTH       1

#define PHYXS_TEST1         (49162)
#define LOOPBACK_NEAR_LBN   (8)
#define LOOPBACK_NEAR_WIDTH (1)

/* Boot status register */
#define PCS_BOOT_STATUS_REG             53248
#define PCS_BOOT_FATAL_ERROR_LBN        0
#define PCS_BOOT_PROGRESS_LBN           1
#define PCS_BOOT_PROGRESS_WIDTH         2
#define PCS_BOOT_PROGRESS_INIT          0
#define PCS_BOOT_PROGRESS_WAIT_MDIO     1
#define PCS_BOOT_PROGRESS_CHECKSUM      2
#define PCS_BOOT_PROGRESS_JUMP          3
#define PCS_BOOT_DOWNLOAD_WAIT_LBN      3
#define PCS_BOOT_CODE_STARTED_LBN       4

/* 100M/1G PHY registers */
#define GPHY_XCONTROL_REG       49152
#define GPHY_ISOLATE_LBN        10
#define GPHY_ISOLATE_WIDTH      1
#define GPHY_DUPLEX_LBN         8
#define GPHY_DUPLEX_WIDTH       1
#define GPHY_LOOPBACK_NEAR_LBN  14
#define GPHY_LOOPBACK_NEAR_WIDTH 1

#define C22EXT_STATUS_REG       49153
#define C22EXT_STATUS_LINK_LBN  2
#define C22EXT_STATUS_LINK_WIDTH 1

#define C22EXT_MSTSLV_CTRL                      49161
#define C22EXT_MSTSLV_CTRL_ADV_1000_HD_LBN      8
#define C22EXT_MSTSLV_CTRL_ADV_1000_FD_LBN      9

#define C22EXT_MSTSLV_STATUS                    49162
#define C22EXT_MSTSLV_STATUS_LP_1000_HD_LBN     10
#define C22EXT_MSTSLV_STATUS_LP_1000_FD_LBN     11

/* Time to wait between powering down the LNPGA and turning off the power
 * rails */
#define LNPGA_PDOWN_WAIT        (HZ / 5)

struct tenxpress_phy_data {
        enum efx_loopback_mode loopback_mode;
        enum efx_phy_mode phy_mode;
        int bad_lp_tries;
};

static ssize_t show_phy_short_reach(struct device *dev,
                                    struct device_attribute *attr, char *buf)
{
        struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
        int reg;

        reg = efx_mdio_read(efx, MDIO_MMD_PMAPMD, MDIO_PMA_10GBT_TXPWR);
        return sprintf(buf, "%d\n", !!(reg & MDIO_PMA_10GBT_TXPWR_SHORT));
}

static ssize_t set_phy_short_reach(struct device *dev,
                                   struct device_attribute *attr,
                                   const char *buf, size_t count)
{
        struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));

        rtnl_lock();
        efx_mdio_set_flag(efx, MDIO_MMD_PMAPMD, MDIO_PMA_10GBT_TXPWR,
                          MDIO_PMA_10GBT_TXPWR_SHORT,
                          count != 0 && *buf != '0');
        efx_reconfigure_port(efx);
        rtnl_unlock();

        return count;
}

static DEVICE_ATTR(phy_short_reach, 0644, show_phy_short_reach,
                   set_phy_short_reach);

int sft9001_wait_boot(struct efx_nic *efx)
{
        unsigned long timeout = jiffies + HZ + 1;
        int boot_stat;

        for (;;) {
                boot_stat = efx_mdio_read(efx, MDIO_MMD_PCS,
                                          PCS_BOOT_STATUS_REG);
                if (boot_stat >= 0) {
                        EFX_LOG(efx, "PHY boot status = %#x\n", boot_stat);
                        switch (boot_stat &
                                ((1 << PCS_BOOT_FATAL_ERROR_LBN) |
                                 (3 << PCS_BOOT_PROGRESS_LBN) |
                                 (1 << PCS_BOOT_DOWNLOAD_WAIT_LBN) |
                                 (1 << PCS_BOOT_CODE_STARTED_LBN))) {
                        case ((1 << PCS_BOOT_FATAL_ERROR_LBN) |
                              (PCS_BOOT_PROGRESS_CHECKSUM <<
                               PCS_BOOT_PROGRESS_LBN)):
                        case ((1 << PCS_BOOT_FATAL_ERROR_LBN) |
                              (PCS_BOOT_PROGRESS_INIT <<
                               PCS_BOOT_PROGRESS_LBN) |
                              (1 << PCS_BOOT_DOWNLOAD_WAIT_LBN)):
                                return -EINVAL;
                        case ((PCS_BOOT_PROGRESS_WAIT_MDIO <<
                               PCS_BOOT_PROGRESS_LBN) |
                              (1 << PCS_BOOT_DOWNLOAD_WAIT_LBN)):
                                return (efx->phy_mode & PHY_MODE_SPECIAL) ?
                                        0 : -EIO;
                        case ((PCS_BOOT_PROGRESS_JUMP <<
                               PCS_BOOT_PROGRESS_LBN) |
                              (1 << PCS_BOOT_CODE_STARTED_LBN)):
                        case ((PCS_BOOT_PROGRESS_JUMP <<
                               PCS_BOOT_PROGRESS_LBN) |
                              (1 << PCS_BOOT_DOWNLOAD_WAIT_LBN) |
                              (1 << PCS_BOOT_CODE_STARTED_LBN)):
                                return (efx->phy_mode & PHY_MODE_SPECIAL) ?
                                        -EIO : 0;
                        default:
                                if (boot_stat & (1 << PCS_BOOT_FATAL_ERROR_LBN))
                                        return -EIO;
                                break;
                        }
                }

                if (time_after_eq(jiffies, timeout))
                        return -ETIMEDOUT;

                msleep(50);
        }
}

static int tenxpress_init(struct efx_nic *efx)
{
        int reg;

        if (efx->phy_type == PHY_TYPE_SFX7101) {
                /* Enable 312.5 MHz clock */
                efx_mdio_write(efx, MDIO_MMD_PCS, PCS_TEST_SELECT_REG,
                               1 << CLK312_EN_LBN);
        } else {
                /* Enable 312.5 MHz clock and GMII */
                reg = efx_mdio_read(efx, MDIO_MMD_PMAPMD, PMA_PMD_XCONTROL_REG);
                reg |= ((1 << PMA_PMD_EXT_GMII_EN_LBN) |
                        (1 << PMA_PMD_EXT_CLK_OUT_LBN) |
                        (1 << PMA_PMD_EXT_CLK312_LBN) |
                        (1 << PMA_PMD_EXT_ROBUST_LBN));

                efx_mdio_write(efx, MDIO_MMD_PMAPMD, PMA_PMD_XCONTROL_REG, reg);
                efx_mdio_set_flag(efx, MDIO_MMD_C22EXT,
                              GPHY_XCONTROL_REG, 1 << GPHY_ISOLATE_LBN,
                              false);
        }

        /* Set the LEDs up as: Green = Link, Amber = Link/Act, Red = Off */
        if (efx->phy_type == PHY_TYPE_SFX7101) {
                efx_mdio_set_flag(efx, MDIO_MMD_PMAPMD, PMA_PMD_LED_CTRL_REG,
                                  1 << PMA_PMA_LED_ACTIVITY_LBN, true);
                efx_mdio_write(efx, MDIO_MMD_PMAPMD, PMA_PMD_LED_OVERR_REG,
                               PMA_PMD_LED_DEFAULT);
        }

        return 0;
}

static int tenxpress_phy_init(struct efx_nic *efx)
{
        struct tenxpress_phy_data *phy_data;
        u16 old_adv, adv;
        int rc = 0;

        phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
        if (!phy_data)
                return -ENOMEM;
        efx->phy_data = phy_data;
        phy_data->phy_mode = efx->phy_mode;

        if (!(efx->phy_mode & PHY_MODE_SPECIAL)) {
                if (efx->phy_type == PHY_TYPE_SFT9001A) {
                        int reg;
                        reg = efx_mdio_read(efx, MDIO_MMD_PMAPMD,
                                            PMA_PMD_XCONTROL_REG);
                        reg |= (1 << PMA_PMD_EXT_SSR_LBN);
                        efx_mdio_write(efx, MDIO_MMD_PMAPMD,
                                       PMA_PMD_XCONTROL_REG, reg);
                        mdelay(200);
                }

                rc = efx_mdio_wait_reset_mmds(efx, TENXPRESS_REQUIRED_DEVS);
                if (rc < 0)
                        goto fail;

                rc = efx_mdio_check_mmds(efx, TENXPRESS_REQUIRED_DEVS, 0);
                if (rc < 0)
                        goto fail;
        }

        rc = tenxpress_init(efx);
        if (rc < 0)
                goto fail;

        /* Set pause advertising */
        old_adv = efx_mdio_read(efx, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
        adv = ((old_adv & ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) |
               mii_advertise_flowctrl(efx->wanted_fc));
        if (adv != old_adv) {
                efx_mdio_write(efx, MDIO_MMD_AN, MDIO_AN_ADVERTISE, adv);
                mdio45_nway_restart(&efx->mdio);
        }

        if (efx->phy_type == PHY_TYPE_SFT9001B) {
                rc = device_create_file(&efx->pci_dev->dev,
                                        &dev_attr_phy_short_reach);
                if (rc)
                        goto fail;
        }

        schedule_timeout_uninterruptible(HZ / 5); /* 200ms */

        /* Let XGXS and SerDes out of reset */
        falcon_reset_xaui(efx);

        return 0;

 fail:
        kfree(efx->phy_data);
        efx->phy_data = NULL;
        return rc;
}

/* Perform a "special software reset" on the PHY. The caller is
 * responsible for saving and restoring the PHY hardware registers
 * properly, and masking/unmasking LASI */
static int tenxpress_special_reset(struct efx_nic *efx)
{
        int rc, reg;

        /* The XGMAC clock is driven from the SFC7101/SFT9001 312MHz clock, so
         * a special software reset can glitch the XGMAC sufficiently for stats
         * requests to fail. */
        efx_stats_disable(efx);

        /* Initiate reset */
        reg = efx_mdio_read(efx, MDIO_MMD_PMAPMD, PMA_PMD_XCONTROL_REG);
        reg |= (1 << PMA_PMD_EXT_SSR_LBN);
        efx_mdio_write(efx, MDIO_MMD_PMAPMD, PMA_PMD_XCONTROL_REG, reg);

        mdelay(200);

        /* Wait for the blocks to come out of reset */
        rc = efx_mdio_wait_reset_mmds(efx, TENXPRESS_REQUIRED_DEVS);
        if (rc < 0)
                goto out;

        /* Try and reconfigure the device */
        rc = tenxpress_init(efx);
        if (rc < 0)
                goto out;

        /* Wait for the XGXS state machine to churn */
        mdelay(10);
out:
        efx_stats_enable(efx);
        return rc;
}

static void sfx7101_check_bad_lp(struct efx_nic *efx, bool link_ok)
{
        struct tenxpress_phy_data *pd = efx->phy_data;
        bool bad_lp;
        int reg;

        if (link_ok) {
                bad_lp = false;
        } else {
                /* Check that AN has started but not completed. */
                reg = efx_mdio_read(efx, MDIO_MMD_AN, MDIO_STAT1);
                if (!(reg & MDIO_AN_STAT1_LPABLE))
                        return; /* LP status is unknown */
                bad_lp = !(reg & MDIO_AN_STAT1_COMPLETE);
                if (bad_lp)
                        pd->bad_lp_tries++;
        }

        /* Nothing to do if all is well and was previously so. */
        if (!pd->bad_lp_tries)
                return;

        /* Use the RX (red) LED as an error indicator once we've seen AN
         * failure several times in a row, and also log a message. */
        if (!bad_lp || pd->bad_lp_tries == MAX_BAD_LP_TRIES) {
                reg = efx_mdio_read(efx, MDIO_MMD_PMAPMD,
                                    PMA_PMD_LED_OVERR_REG);
                reg &= ~(PMA_PMD_LED_MASK << PMA_PMD_LED_RX_LBN);
                if (!bad_lp) {
                        reg |= PMA_PMD_LED_OFF << PMA_PMD_LED_RX_LBN;
                } else {
                        reg |= PMA_PMD_LED_FLASH << PMA_PMD_LED_RX_LBN;
                        EFX_ERR(efx, "appears to be plugged into a port"
                                " that is not 10GBASE-T capable. The PHY"
                                " supports 10GBASE-T ONLY, so no link can"
                                " be established\n");
                }
                efx_mdio_write(efx, MDIO_MMD_PMAPMD,
                               PMA_PMD_LED_OVERR_REG, reg);
                pd->bad_lp_tries = bad_lp;
        }
}

static bool sfx7101_link_ok(struct efx_nic *efx)
{
        return efx_mdio_links_ok(efx,
                                 MDIO_DEVS_PMAPMD |
                                 MDIO_DEVS_PCS |
                                 MDIO_DEVS_PHYXS);
}

static bool sft9001_link_ok(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
        u32 reg;

        if (efx_phy_mode_disabled(efx->phy_mode))
                return false;
        else if (efx->loopback_mode == LOOPBACK_GPHY)
                return true;
        else if (efx->loopback_mode)
                return efx_mdio_links_ok(efx,
                                         MDIO_DEVS_PMAPMD |
                                         MDIO_DEVS_PHYXS);

        /* We must use the same definition of link state as LASI,
         * otherwise we can miss a link state transition
         */
        if (ecmd->speed == 10000) {
                reg = efx_mdio_read(efx, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT1);
                return reg & MDIO_PCS_10GBRT_STAT1_BLKLK;
        } else {
                reg = efx_mdio_read(efx, MDIO_MMD_C22EXT, C22EXT_STATUS_REG);
                return reg & (1 << C22EXT_STATUS_LINK_LBN);
        }
}

static void tenxpress_ext_loopback(struct efx_nic *efx)
{
        efx_mdio_set_flag(efx, MDIO_MMD_PHYXS, PHYXS_TEST1,
                          1 << LOOPBACK_NEAR_LBN,
                          efx->loopback_mode == LOOPBACK_PHYXS);
        if (efx->phy_type != PHY_TYPE_SFX7101)
                efx_mdio_set_flag(efx, MDIO_MMD_C22EXT, GPHY_XCONTROL_REG,
                                  1 << GPHY_LOOPBACK_NEAR_LBN,
                                  efx->loopback_mode == LOOPBACK_GPHY);
}

static void tenxpress_low_power(struct efx_nic *efx)
{
        if (efx->phy_type == PHY_TYPE_SFX7101)
                efx_mdio_set_mmds_lpower(
                        efx, !!(efx->phy_mode & PHY_MODE_LOW_POWER),
                        TENXPRESS_REQUIRED_DEVS);
        else
                efx_mdio_set_flag(
                        efx, MDIO_MMD_PMAPMD, PMA_PMD_XCONTROL_REG,
                        1 << PMA_PMD_EXT_LPOWER_LBN,
                        !!(efx->phy_mode & PHY_MODE_LOW_POWER));
}

static void tenxpress_phy_reconfigure(struct efx_nic *efx)
{
        struct tenxpress_phy_data *phy_data = efx->phy_data;
        struct ethtool_cmd ecmd;
        bool phy_mode_change, loop_reset;

        if (efx->phy_mode & (PHY_MODE_OFF | PHY_MODE_SPECIAL)) {
                phy_data->phy_mode = efx->phy_mode;
                return;
        }

        tenxpress_low_power(efx);

        phy_mode_change = (efx->phy_mode == PHY_MODE_NORMAL &&
                           phy_data->phy_mode != PHY_MODE_NORMAL);
        loop_reset = (LOOPBACK_OUT_OF(phy_data, efx, efx->phy_op->loopbacks) ||
                      LOOPBACK_CHANGED(phy_data, efx, 1 << LOOPBACK_GPHY));

        if (loop_reset || phy_mode_change) {
                int rc;

                efx->phy_op->get_settings(efx, &ecmd);

                if (loop_reset || phy_mode_change) {
                        tenxpress_special_reset(efx);

                        /* Reset XAUI if we were in 10G, and are staying
                         * in 10G. If we're moving into and out of 10G
                         * then xaui will be reset anyway */
                        if (EFX_IS10G(efx))
                                falcon_reset_xaui(efx);
                }

                rc = efx->phy_op->set_settings(efx, &ecmd);
                WARN_ON(rc);
        }

        efx_mdio_transmit_disable(efx);
        efx_mdio_phy_reconfigure(efx);
        tenxpress_ext_loopback(efx);

        phy_data->loopback_mode = efx->loopback_mode;
        phy_data->phy_mode = efx->phy_mode;

        if (efx->phy_type == PHY_TYPE_SFX7101) {
                efx->link_speed = 10000;
                efx->link_fd = true;
                efx->link_up = sfx7101_link_ok(efx);
        } else {
                efx->phy_op->get_settings(efx, &ecmd);
                efx->link_speed = ecmd.speed;
                efx->link_fd = ecmd.duplex == DUPLEX_FULL;
                efx->link_up = sft9001_link_ok(efx, &ecmd);
        }
        efx->link_fc = efx_mdio_get_pause(efx);
}

/* Poll PHY for interrupt */
static void tenxpress_phy_poll(struct efx_nic *efx)
{
        struct tenxpress_phy_data *phy_data = efx->phy_data;
        bool change = false;

        if (efx->phy_type == PHY_TYPE_SFX7101) {
                bool link_ok = sfx7101_link_ok(efx);
                if (link_ok != efx->link_up) {
                        change = true;
                } else {
                        unsigned int link_fc = efx_mdio_get_pause(efx);
                        if (link_fc != efx->link_fc)
                                change = true;
                }
                sfx7101_check_bad_lp(efx, link_ok);
        } else if (efx->loopback_mode) {
                bool link_ok = sft9001_link_ok(efx, NULL);
                if (link_ok != efx->link_up)
                        change = true;
        } else {
                int status = efx_mdio_read(efx, MDIO_MMD_PMAPMD,
                                           MDIO_PMA_LASI_STAT);
                if (status & MDIO_PMA_LASI_LSALARM)
                        change = true;
        }

        if (change)
                falcon_sim_phy_event(efx);

        if (phy_data->phy_mode != PHY_MODE_NORMAL)
                return;
}

static void tenxpress_phy_fini(struct efx_nic *efx)
{
        int reg;

        if (efx->phy_type == PHY_TYPE_SFT9001B)
                device_remove_file(&efx->pci_dev->dev,
                                   &dev_attr_phy_short_reach);

        if (efx->phy_type == PHY_TYPE_SFX7101) {
                /* Power down the LNPGA */
                reg = (1 << PMA_PMD_LNPGA_POWERDOWN_LBN);
                efx_mdio_write(efx, MDIO_MMD_PMAPMD, PMA_PMD_XCONTROL_REG, reg);

                /* Waiting here ensures that the board fini, which can turn
                 * off the power to the PHY, won't get run until the LNPGA
                 * powerdown has been given long enough to complete. */
                schedule_timeout_uninterruptible(LNPGA_PDOWN_WAIT); /* 200 ms */
        }

        kfree(efx->phy_data);
        efx->phy_data = NULL;
}


/* Set the RX and TX LEDs and Link LED flashing. The other LEDs
 * (which probably aren't wired anyway) are left in AUTO mode */
void tenxpress_phy_blink(struct efx_nic *efx, bool blink)
{
        int reg;

        if (blink)
                reg = (PMA_PMD_LED_FLASH << PMA_PMD_LED_TX_LBN) |
                        (PMA_PMD_LED_FLASH << PMA_PMD_LED_RX_LBN) |
                        (PMA_PMD_LED_FLASH << PMA_PMD_LED_LINK_LBN);
        else
                reg = PMA_PMD_LED_DEFAULT;

        efx_mdio_write(efx, MDIO_MMD_PMAPMD, PMA_PMD_LED_OVERR_REG, reg);
}

static const char *const sfx7101_test_names[] = {
        "bist"
};

static int
sfx7101_run_tests(struct efx_nic *efx, int *results, unsigned flags)
{
        int rc;

        if (!(flags & ETH_TEST_FL_OFFLINE))
                return 0;

        /* BIST is automatically run after a special software reset */
        rc = tenxpress_special_reset(efx);
        results[0] = rc ? -1 : 1;
        return rc;
}

static const char *const sft9001_test_names[] = {
        "bist",
        "cable.pairA.status",
        "cable.pairB.status",
        "cable.pairC.status",
        "cable.pairD.status",
        "cable.pairA.length",
        "cable.pairB.length",
        "cable.pairC.length",
        "cable.pairD.length",
};

static int sft9001_run_tests(struct efx_nic *efx, int *results, unsigned flags)
{
        struct ethtool_cmd ecmd;
        int rc = 0, rc2, i, ctrl_reg, res_reg;

        if (flags & ETH_TEST_FL_OFFLINE)
                efx->phy_op->get_settings(efx, &ecmd);

        /* Initialise cable diagnostic results to unknown failure */
        for (i = 1; i < 9; ++i)
                results[i] = -1;

        /* Run cable diagnostics; wait up to 5 seconds for them to complete.
         * A cable fault is not a self-test failure, but a timeout is. */
        ctrl_reg = ((1 << CDIAG_CTRL_IMMED_LBN) |
                    (CDIAG_CTRL_LEN_METRES << CDIAG_CTRL_LEN_UNIT_LBN));
        if (flags & ETH_TEST_FL_OFFLINE) {
                /* Break the link in order to run full diagnostics.  We
                 * must reset the PHY to resume normal service. */
                ctrl_reg |= (1 << CDIAG_CTRL_BRK_LINK_LBN);
        }
        efx_mdio_write(efx, MDIO_MMD_PMAPMD, PMA_PMD_CDIAG_CTRL_REG,
                       ctrl_reg);
        i = 0;
        while (efx_mdio_read(efx, MDIO_MMD_PMAPMD, PMA_PMD_CDIAG_CTRL_REG) &
               (1 << CDIAG_CTRL_IN_PROG_LBN)) {
                if (++i == 50) {
                        rc = -ETIMEDOUT;
                        goto out;
                }
                msleep(100);
        }
        res_reg = efx_mdio_read(efx, MDIO_MMD_PMAPMD, PMA_PMD_CDIAG_RES_REG);
        for (i = 0; i < 4; i++) {
                int pair_res =
                        (res_reg >> (CDIAG_RES_A_LBN - i * CDIAG_RES_WIDTH))
                        & ((1 << CDIAG_RES_WIDTH) - 1);
                int len_reg = efx_mdio_read(efx, MDIO_MMD_PMAPMD,
                                            PMA_PMD_CDIAG_LEN_REG + i);
                if (pair_res == CDIAG_RES_OK)
                        results[1 + i] = 1;
                else if (pair_res == CDIAG_RES_INVALID)
                        results[1 + i] = -1;
                else
                        results[1 + i] = -pair_res;
                if (pair_res != CDIAG_RES_INVALID &&
                    pair_res != CDIAG_RES_OPEN &&
                    len_reg != 0xffff)
                        results[5 + i] = len_reg;
        }

out:
        if (flags & ETH_TEST_FL_OFFLINE) {
                /* Reset, running the BIST and then resuming normal service. */
                rc2 = tenxpress_special_reset(efx);
                results[0] = rc2 ? -1 : 1;
                if (!rc)
                        rc = rc2;

                rc2 = efx->phy_op->set_settings(efx, &ecmd);
                if (!rc)
                        rc = rc2;
        }

        return rc;
}

static void
tenxpress_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
        u32 adv = 0, lpa = 0;
        int reg;

        if (efx->phy_type != PHY_TYPE_SFX7101) {
                reg = efx_mdio_read(efx, MDIO_MMD_C22EXT, C22EXT_MSTSLV_CTRL);
                if (reg & (1 << C22EXT_MSTSLV_CTRL_ADV_1000_FD_LBN))
                        adv |= ADVERTISED_1000baseT_Full;
                reg = efx_mdio_read(efx, MDIO_MMD_C22EXT, C22EXT_MSTSLV_STATUS);
                if (reg & (1 << C22EXT_MSTSLV_STATUS_LP_1000_HD_LBN))
                        lpa |= ADVERTISED_1000baseT_Half;
                if (reg & (1 << C22EXT_MSTSLV_STATUS_LP_1000_FD_LBN))
                        lpa |= ADVERTISED_1000baseT_Full;
        }
        reg = efx_mdio_read(efx, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL);
        if (reg & MDIO_AN_10GBT_CTRL_ADV10G)
                adv |= ADVERTISED_10000baseT_Full;
        reg = efx_mdio_read(efx, MDIO_MMD_AN, MDIO_AN_10GBT_STAT);
        if (reg & MDIO_AN_10GBT_STAT_LP10G)
                lpa |= ADVERTISED_10000baseT_Full;

        mdio45_ethtool_gset_npage(&efx->mdio, ecmd, adv, lpa);

        ecmd->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
        if (efx->phy_type != PHY_TYPE_SFX7101) {
                ecmd->supported |= (SUPPORTED_100baseT_Full |
                                    SUPPORTED_1000baseT_Full);
                if (ecmd->speed != SPEED_10000) {
                        ecmd->eth_tp_mdix =
                                (efx_mdio_read(efx, MDIO_MMD_PMAPMD,
                                               PMA_PMD_XSTATUS_REG) &
                                 (1 << PMA_PMD_XSTAT_MDIX_LBN))
                                ? ETH_TP_MDI_X : ETH_TP_MDI;
                }
        }

        /* In loopback, the PHY automatically brings up the correct interface,
         * but doesn't advertise the correct speed. So override it */
        if (efx->loopback_mode == LOOPBACK_GPHY)
                ecmd->speed = SPEED_1000;
        else if (LOOPBACK_MASK(efx) & efx->phy_op->loopbacks)
                ecmd->speed = SPEED_10000;
}

static int tenxpress_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
        if (!ecmd->autoneg)
                return -EINVAL;

        return efx_mdio_set_settings(efx, ecmd);
}

static void sfx7101_set_npage_adv(struct efx_nic *efx, u32 advertising)
{
        efx_mdio_set_flag(efx, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL,
                          MDIO_AN_10GBT_CTRL_ADV10G,
                          advertising & ADVERTISED_10000baseT_Full);
}

static void sft9001_set_npage_adv(struct efx_nic *efx, u32 advertising)
{
        efx_mdio_set_flag(efx, MDIO_MMD_C22EXT, C22EXT_MSTSLV_CTRL,
                          1 << C22EXT_MSTSLV_CTRL_ADV_1000_FD_LBN,
                          advertising & ADVERTISED_1000baseT_Full);
        efx_mdio_set_flag(efx, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL,
                          MDIO_AN_10GBT_CTRL_ADV10G,
                          advertising & ADVERTISED_10000baseT_Full);
}

struct efx_phy_operations falcon_sfx7101_phy_ops = {
        .macs             = EFX_XMAC,
        .init             = tenxpress_phy_init,
        .reconfigure      = tenxpress_phy_reconfigure,
        .poll             = tenxpress_phy_poll,
        .fini             = tenxpress_phy_fini,
        .clear_interrupt  = efx_port_dummy_op_void,
        .get_settings     = tenxpress_get_settings,
        .set_settings     = tenxpress_set_settings,
        .set_npage_adv    = sfx7101_set_npage_adv,
        .num_tests        = ARRAY_SIZE(sfx7101_test_names),
        .test_names       = sfx7101_test_names,
        .run_tests        = sfx7101_run_tests,
        .mmds             = TENXPRESS_REQUIRED_DEVS,
        .loopbacks        = SFX7101_LOOPBACKS,
};

struct efx_phy_operations falcon_sft9001_phy_ops = {
        .macs             = EFX_GMAC | EFX_XMAC,
        .init             = tenxpress_phy_init,
        .reconfigure      = tenxpress_phy_reconfigure,
        .poll             = tenxpress_phy_poll,
        .fini             = tenxpress_phy_fini,
        .clear_interrupt  = efx_port_dummy_op_void,
        .get_settings     = tenxpress_get_settings,
        .set_settings     = tenxpress_set_settings,
        .set_npage_adv    = sft9001_set_npage_adv,
        .num_tests        = ARRAY_SIZE(sft9001_test_names),
        .test_names       = sft9001_test_names,
        .run_tests        = sft9001_run_tests,
        .mmds             = TENXPRESS_REQUIRED_DEVS,
        .loopbacks        = SFT9001_LOOPBACKS,
};