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/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_MMDREG_DEVS_PMAPMD	| \
				 MDIO_MMDREG_DEVS_PCS		| \
				 MDIO_MMDREG_DEVS_PHYXS		| \
				 MDIO_MMDREG_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)

/* LASI Control */
#define PMA_PMD_LASI_CTRL	36866
#define PMA_PMD_LASI_STATUS	36869
#define PMA_PMD_LS_ALARM_LBN	0
#define PMA_PMD_LS_ALARM_WIDTH	1
#define PMA_PMD_TX_ALARM_LBN	1
#define PMA_PMD_TX_ALARM_WIDTH	1
#define PMA_PMD_RX_ALARM_LBN	2
#define PMA_PMD_RX_ALARM_WIDTH	1
#define PMA_PMD_AN_ALARM_LBN	3
#define PMA_PMD_AN_ALARM_WIDTH	1

/* 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_SSR_LBN	15
#define PMA_PMD_EXT_SSR_WIDTH	1

/* extended status register */
#define PMA_PMD_XSTATUS_REG	49153
#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)

#define PCS_10GBASET_STAT1       32
#define PCS_10GBASET_BLKLK_LBN   0
#define PCS_10GBASET_BLKLK_WIDTH 1

/* Boot status register */
#define PCS_BOOT_STATUS_REG	53248
#define PCS_BOOT_FATAL_ERR_LBN	(0)
#define PCS_BOOT_PROGRESS_LBN	(1)
#define PCS_BOOT_PROGRESS_WIDTH	(2)
#define PCS_BOOT_COMPLETE_LBN	(3)

#define PCS_BOOT_MAX_DELAY	(100)
#define PCS_BOOT_POLL_DELAY	(10)

/* 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_REG       49162
#define C22EXT_MSTSLV_1000_HD_LBN 10
#define C22EXT_MSTSLV_1000_HD_WIDTH 1
#define C22EXT_MSTSLV_1000_FD_LBN 11
#define C22EXT_MSTSLV_1000_FD_WIDTH 1

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

static int crc_error_reset_threshold = 100;
module_param(crc_error_reset_threshold, int, 0644);
MODULE_PARM_DESC(crc_error_reset_threshold,
		 "Max number of CRC errors before XAUI reset");

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

void tenxpress_crc_err(struct efx_nic *efx)
{
	struct tenxpress_phy_data *phy_data = efx->phy_data;
	if (phy_data != NULL)
		atomic_inc(&phy_data->bad_crc_count);
}

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 = mdio_clause45_read(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
				 MDIO_PMAPMD_10GBT_TXPWR);
	return sprintf(buf, "%d\n",
		       !!(reg & (1 << MDIO_PMAPMD_10GBT_TXPWR_SHORT_LBN)));
}

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();
	mdio_clause45_set_flag(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
			       MDIO_PMAPMD_10GBT_TXPWR,
			       MDIO_PMAPMD_10GBT_TXPWR_SHORT_LBN,
			       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);

/* Check that the C166 has booted successfully */
static int tenxpress_phy_check(struct efx_nic *efx)
{
	int phy_id = efx->mii.phy_id;
	int count = PCS_BOOT_MAX_DELAY / PCS_BOOT_POLL_DELAY;
	int boot_stat;

	/* Wait for the boot to complete (or not) */
	while (count) {
		boot_stat = mdio_clause45_read(efx, phy_id,
					       MDIO_MMD_PCS,
					       PCS_BOOT_STATUS_REG);
		if (boot_stat & (1 << PCS_BOOT_COMPLETE_LBN))
			break;
		count--;
		udelay(PCS_BOOT_POLL_DELAY);
	}

	if (!count) {
		EFX_ERR(efx, "%s: PHY boot timed out. Last status "
			"%x\n", __func__,
			(boot_stat >> PCS_BOOT_PROGRESS_LBN) &
			((1 << PCS_BOOT_PROGRESS_WIDTH) - 1));
		return -ETIMEDOUT;
	}

	return 0;
}

static int tenxpress_init(struct efx_nic *efx)
{
	int phy_id = efx->mii.phy_id;
	int reg;
	int rc;

	if (efx->phy_type == PHY_TYPE_SFX7101) {
		/* Enable 312.5 MHz clock */
		mdio_clause45_write(efx, phy_id,
				    MDIO_MMD_PCS, PCS_TEST_SELECT_REG,
				    1 << CLK312_EN_LBN);
	} else {
		/* Enable 312.5 MHz clock and GMII */
		reg = mdio_clause45_read(efx, phy_id, 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));
		mdio_clause45_write(efx, phy_id, MDIO_MMD_PMAPMD,
				    PMA_PMD_XCONTROL_REG, reg);
		mdio_clause45_set_flag(efx, phy_id, MDIO_MMD_C22EXT,
				       GPHY_XCONTROL_REG, GPHY_ISOLATE_LBN,
				       false);
	}

	rc = tenxpress_phy_check(efx);
	if (rc < 0)
		return rc;

	/* Set the LEDs up as: Green = Link, Amber = Link/Act, Red = Off */
	if (efx->phy_type == PHY_TYPE_SFX7101) {
		mdio_clause45_set_flag(efx, phy_id, MDIO_MMD_PMAPMD,
				       PMA_PMD_LED_CTRL_REG,
				       PMA_PMA_LED_ACTIVITY_LBN,
				       true);
		mdio_clause45_write(efx, phy_id, MDIO_MMD_PMAPMD,
				    PMA_PMD_LED_OVERR_REG, PMA_PMD_LED_DEFAULT);
	}

	return rc;
}

static int tenxpress_phy_init(struct efx_nic *efx)
{
	struct tenxpress_phy_data *phy_data;
	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 = mdio_clause45_read(efx, efx->mii.phy_id,
						 MDIO_MMD_PMAPMD,
						 PMA_PMD_XCONTROL_REG);
			reg |= (1 << PMA_PMD_EXT_SSR_LBN);
			mdio_clause45_write(efx, efx->mii.phy_id,
					    MDIO_MMD_PMAPMD,
					    PMA_PMD_XCONTROL_REG, reg);
			mdelay(200);
		}

		rc = mdio_clause45_wait_reset_mmds(efx,
						   TENXPRESS_REQUIRED_DEVS);
		if (rc < 0)
			goto fail;

		rc = mdio_clause45_check_mmds(efx, TENXPRESS_REQUIRED_DEVS, 0);
		if (rc < 0)
			goto fail;
	}

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

	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. Since we don't often special_reset, just lock. */
	spin_lock(&efx->stats_lock);

	/* Initiate reset */
	reg = mdio_clause45_read(efx, efx->mii.phy_id,
				 MDIO_MMD_PMAPMD, PMA_PMD_XCONTROL_REG);
	reg |= (1 << PMA_PMD_EXT_SSR_LBN);
	mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
			    PMA_PMD_XCONTROL_REG, reg);

	mdelay(200);

	/* Wait for the blocks to come out of reset */
	rc = mdio_clause45_wait_reset_mmds(efx,
					   TENXPRESS_REQUIRED_DEVS);
	if (rc < 0)
		goto unlock;

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

	/* Wait for the XGXS state machine to churn */
	mdelay(10);
unlock:
	spin_unlock(&efx->stats_lock);
	return rc;
}

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

	if (link_ok) {
		bad_lp = false;
	} else {
		/* Check that AN has started but not completed. */
		reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_AN,
					 MDIO_AN_STATUS);
		if (!(reg & (1 << MDIO_AN_STATUS_LP_AN_CAP_LBN)))
			return; /* LP status is unknown */
		bad_lp = !(reg & (1 << MDIO_AN_STATUS_AN_DONE_LBN));
		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 = mdio_clause45_read(efx, phy_id, 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");
		}
		mdio_clause45_write(efx, phy_id, 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 mdio_clause45_links_ok(efx,
				      MDIO_MMDREG_DEVS_PMAPMD |
				      MDIO_MMDREG_DEVS_PCS |
				      MDIO_MMDREG_DEVS_PHYXS);
}

static bool sft9001_link_ok(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
	int phy_id = efx->mii.phy_id;
	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 mdio_clause45_links_ok(efx,
					      MDIO_MMDREG_DEVS_PMAPMD |
					      MDIO_MMDREG_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 = mdio_clause45_read(efx, phy_id, MDIO_MMD_PCS,
					 PCS_10GBASET_STAT1);
		return reg & (1 << PCS_10GBASET_BLKLK_LBN);
	} else {
		reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_C22EXT,
					 C22EXT_STATUS_REG);
		return reg & (1 << C22EXT_STATUS_LINK_LBN);
	}
}

static void tenxpress_ext_loopback(struct efx_nic *efx)
{
	int phy_id = efx->mii.phy_id;

	mdio_clause45_set_flag(efx, phy_id, MDIO_MMD_PHYXS,
			       PHYXS_TEST1, LOOPBACK_NEAR_LBN,
			       efx->loopback_mode == LOOPBACK_PHYXS);
	if (efx->phy_type != PHY_TYPE_SFX7101)
		mdio_clause45_set_flag(efx, phy_id, MDIO_MMD_C22EXT,
				       GPHY_XCONTROL_REG,
				       GPHY_LOOPBACK_NEAR_LBN,
				       efx->loopback_mode == LOOPBACK_GPHY);
}

static void tenxpress_low_power(struct efx_nic *efx)
{
	int phy_id = efx->mii.phy_id;

	if (efx->phy_type == PHY_TYPE_SFX7101)
		mdio_clause45_set_mmds_lpower(
			efx, !!(efx->phy_mode & PHY_MODE_LOW_POWER),
			TENXPRESS_REQUIRED_DEVS);
	else
		mdio_clause45_set_flag(
			efx, phy_id, MDIO_MMD_PMAPMD,
			PMA_PMD_XCONTROL_REG, 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, loop_toggle, loopback;

	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);
	loopback = LOOPBACK_MASK(efx) & efx->phy_op->loopbacks;
	loop_toggle = LOOPBACK_CHANGED(phy_data, efx, efx->phy_op->loopbacks);
	loop_reset = (LOOPBACK_OUT_OF(phy_data, efx, efx->phy_op->loopbacks) ||
		      LOOPBACK_CHANGED(phy_data, efx, 1 << LOOPBACK_GPHY));

	if (loop_reset || loop_toggle || loopback || 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);
		}

		if (efx->phy_type != PHY_TYPE_SFX7101) {
			/* Only change autoneg once, on coming out or
			 * going into loopback */
			if (loop_toggle)
				ecmd.autoneg = !loopback;
			if (loopback) {
				ecmd.duplex = DUPLEX_FULL;
				if (efx->loopback_mode == LOOPBACK_GPHY)
					ecmd.speed = SPEED_1000;
				else
					ecmd.speed = SPEED_10000;
			}
		}

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

	mdio_clause45_transmit_disable(efx);
	mdio_clause45_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 = mdio_clause45_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, link_ok;
	unsigned link_fc;

	if (efx->phy_type == PHY_TYPE_SFX7101) {
		link_ok = sfx7101_link_ok(efx);
		if (link_ok != efx->link_up) {
			change = true;
		} else {
			link_fc = mdio_clause45_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 {
		u32 status = mdio_clause45_read(efx, efx->mii.phy_id,
						MDIO_MMD_PMAPMD,
						PMA_PMD_LASI_STATUS);
		if (status & (1 << PMA_PMD_LS_ALARM_LBN))
			change = true;
	}

	if (change)
		falcon_sim_phy_event(efx);

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

	if (EFX_WORKAROUND_10750(efx) &&
	    atomic_read(&phy_data->bad_crc_count) > crc_error_reset_threshold) {
		EFX_ERR(efx, "Resetting XAUI due to too many CRC errors\n");
		falcon_reset_xaui(efx);
		atomic_set(&phy_data->bad_crc_count, 0);
	}
}

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);
		mdio_clause45_write(efx, efx->mii.phy_id, 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;

	mdio_clause45_write(efx, efx->mii.phy_id, 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 phy_id = efx->mii.phy_id;
	int rc = 0, rc2, i, res_reg;

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

	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. */
	mdio_clause45_write(efx, phy_id, MDIO_MMD_PMAPMD,
			    PMA_PMD_CDIAG_CTRL_REG,
			    (1 << CDIAG_CTRL_IMMED_LBN) |
			    (1 << CDIAG_CTRL_BRK_LINK_LBN) |
			    (CDIAG_CTRL_LEN_METRES << CDIAG_CTRL_LEN_UNIT_LBN));
	i = 0;
	while (mdio_clause45_read(efx, phy_id, MDIO_MMD_PMAPMD,
				  PMA_PMD_CDIAG_CTRL_REG) &
	       (1 << CDIAG_CTRL_IN_PROG_LBN)) {
		if (++i == 50) {
			rc = -ETIMEDOUT;
			goto reset;
		}
		msleep(100);
	}
	res_reg = mdio_clause45_read(efx, efx->mii.phy_id, 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 = mdio_clause45_read(efx, efx->mii.phy_id,
						 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;
	}

	/* We must reset to exit cable diagnostic mode.  The BIST will
	 * also run when we do this. */
reset:
	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 u32 tenxpress_get_xnp_lpa(struct efx_nic *efx)
{
	int phy = efx->mii.phy_id;
	u32 lpa = 0;
	int reg;

	if (efx->phy_type != PHY_TYPE_SFX7101) {
		reg = mdio_clause45_read(efx, phy, MDIO_MMD_C22EXT,
					 C22EXT_MSTSLV_REG);
		if (reg & (1 << C22EXT_MSTSLV_1000_HD_LBN))
			lpa |= ADVERTISED_1000baseT_Half;
		if (reg & (1 << C22EXT_MSTSLV_1000_FD_LBN))
			lpa |= ADVERTISED_1000baseT_Full;
	}
	reg = mdio_clause45_read(efx, phy, MDIO_MMD_AN, MDIO_AN_10GBT_STATUS);
	if (reg & (1 << MDIO_AN_10GBT_STATUS_LP_10G_LBN))
		lpa |= ADVERTISED_10000baseT_Full;
	return lpa;
}

static void sfx7101_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
	mdio_clause45_get_settings_ext(efx, ecmd, ADVERTISED_10000baseT_Full,
				       tenxpress_get_xnp_lpa(efx));
	ecmd->supported |= SUPPORTED_10000baseT_Full;
	ecmd->advertising |= ADVERTISED_10000baseT_Full;
}

static void sft9001_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
	int phy_id = efx->mii.phy_id;
	u32 xnp_adv = 0;
	int reg;

	reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_PMAPMD,
				 PMA_PMD_SPEED_ENABLE_REG);
	if (EFX_WORKAROUND_13204(efx) && (reg & (1 << PMA_PMD_100TX_ADV_LBN)))
		xnp_adv |= ADVERTISED_100baseT_Full;
	if (reg & (1 << PMA_PMD_1000T_ADV_LBN))
		xnp_adv |= ADVERTISED_1000baseT_Full;
	if (reg & (1 << PMA_PMD_10000T_ADV_LBN))
		xnp_adv |= ADVERTISED_10000baseT_Full;

	mdio_clause45_get_settings_ext(efx, ecmd, xnp_adv,
				       tenxpress_get_xnp_lpa(efx));

	ecmd->supported |= (SUPPORTED_100baseT_Half |
			    SUPPORTED_100baseT_Full |
			    SUPPORTED_1000baseT_Full);

	/* Use the vendor defined C22ext register for duplex settings */
	if (ecmd->speed != SPEED_10000 && !ecmd->autoneg) {
		reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_C22EXT,
					 GPHY_XCONTROL_REG);
		ecmd->duplex = (reg & (1 << GPHY_DUPLEX_LBN) ?
				DUPLEX_FULL : DUPLEX_HALF);
	}
}

static int sft9001_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
	int phy_id = efx->mii.phy_id;
	int rc;

	rc = mdio_clause45_set_settings(efx, ecmd);
	if (rc)
		return rc;

	if (ecmd->speed != SPEED_10000 && !ecmd->autoneg)
		mdio_clause45_set_flag(efx, phy_id, MDIO_MMD_C22EXT,
				       GPHY_XCONTROL_REG, GPHY_DUPLEX_LBN,
				       ecmd->duplex == DUPLEX_FULL);

	return rc;
}

static bool sft9001_set_xnp_advertise(struct efx_nic *efx, u32 advertising)
{
	int phy = efx->mii.phy_id;
	int reg = mdio_clause45_read(efx, phy, MDIO_MMD_PMAPMD,
				     PMA_PMD_SPEED_ENABLE_REG);
	bool enabled;

	reg &= ~((1 << 2) | (1 << 3));
	if (EFX_WORKAROUND_13204(efx) &&
	    (advertising & ADVERTISED_100baseT_Full))
		reg |= 1 << PMA_PMD_100TX_ADV_LBN;
	if (advertising & ADVERTISED_1000baseT_Full)
		reg |= 1 << PMA_PMD_1000T_ADV_LBN;
	if (advertising & ADVERTISED_10000baseT_Full)
		reg |= 1 << PMA_PMD_10000T_ADV_LBN;
	mdio_clause45_write(efx, phy, MDIO_MMD_PMAPMD,
			    PMA_PMD_SPEED_ENABLE_REG, reg);

	enabled = (advertising &
		   (ADVERTISED_1000baseT_Half |
		    ADVERTISED_1000baseT_Full |
		    ADVERTISED_10000baseT_Full));
	if (EFX_WORKAROUND_13204(efx))
		enabled |= (advertising & ADVERTISED_100baseT_Full);
	return enabled;
}

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	  = sfx7101_get_settings,
	.set_settings	  = mdio_clause45_set_settings,
	.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	  = sft9001_get_settings,
	.set_settings	  = sft9001_set_settings,
	.set_xnp_advertise = sft9001_set_xnp_advertise,
	.num_tests	  = ARRAY_SIZE(sft9001_test_names),
	.test_names	  = sft9001_test_names,
	.run_tests	  = sft9001_run_tests,
	.mmds             = TENXPRESS_REQUIRED_DEVS,
	.loopbacks        = SFT9001_LOOPBACKS,
};