[mirror_ubuntu-zesty-kernel.git] / drivers / net / sfc / mcdi_phy.c

/****************************************************************************
 * Driver for Solarflare Solarstorm network controllers and boards
 * Copyright 2009 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.
 */

/*
 * Driver for PHY related operations via MCDI.
 */

#include "efx.h"
#include "phy.h"
#include "mcdi.h"
#include "mcdi_pcol.h"
#include "mdio_10g.h"

struct efx_mcdi_phy_cfg {
	u32 flags;
	u32 type;
	u32 supported_cap;
	u32 channel;
	u32 port;
	u32 stats_mask;
	u8 name[20];
	u32 media;
	u32 mmd_mask;
	u8 revision[20];
	u32 forced_cap;
};

static int
efx_mcdi_get_phy_cfg(struct efx_nic *efx, struct efx_mcdi_phy_cfg *cfg)
{
	u8 outbuf[MC_CMD_GET_PHY_CFG_OUT_LEN];
	size_t outlen;
	int rc;

	BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_IN_LEN != 0);
	BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_OUT_NAME_LEN != sizeof(cfg->name));

	rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_CFG, NULL, 0,
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;

	if (outlen < MC_CMD_GET_PHY_CFG_OUT_LEN) {
		rc = -EMSGSIZE;
		goto fail;
	}

	cfg->flags = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_FLAGS);
	cfg->type = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_TYPE);
	cfg->supported_cap =
		MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_SUPPORTED_CAP);
	cfg->channel = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_CHANNEL);
	cfg->port = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_PRT);
	cfg->stats_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_STATS_MASK);
	memcpy(cfg->name, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_NAME),
	       sizeof(cfg->name));
	cfg->media = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MEDIA_TYPE);
	cfg->mmd_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MMD_MASK);
	memcpy(cfg->revision, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_REVISION),
	       sizeof(cfg->revision));

	return 0;

fail:
	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
	return rc;
}

static int efx_mcdi_set_link(struct efx_nic *efx, u32 capabilities,
			     u32 flags, u32 loopback_mode,
			     u32 loopback_speed)
{
	u8 inbuf[MC_CMD_SET_LINK_IN_LEN];
	int rc;

	BUILD_BUG_ON(MC_CMD_SET_LINK_OUT_LEN != 0);

	MCDI_SET_DWORD(inbuf, SET_LINK_IN_CAP, capabilities);
	MCDI_SET_DWORD(inbuf, SET_LINK_IN_FLAGS, flags);
	MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_MODE, loopback_mode);
	MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_SPEED, loopback_speed);

	rc = efx_mcdi_rpc(efx, MC_CMD_SET_LINK, inbuf, sizeof(inbuf),
			  NULL, 0, NULL);
	if (rc)
		goto fail;

	return 0;

fail:
	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
	return rc;
}

static int efx_mcdi_loopback_modes(struct efx_nic *efx, u64 *loopback_modes)
{
	u8 outbuf[MC_CMD_GET_LOOPBACK_MODES_OUT_LEN];
	size_t outlen;
	int rc;

	rc = efx_mcdi_rpc(efx, MC_CMD_GET_LOOPBACK_MODES, NULL, 0,
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;

	if (outlen < MC_CMD_GET_LOOPBACK_MODES_OUT_LEN) {
		rc = -EMSGSIZE;
		goto fail;
	}

	*loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_SUGGESTED);

	return 0;

fail:
	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
	return rc;
}

int efx_mcdi_mdio_read(struct efx_nic *efx, unsigned int bus,
			 unsigned int prtad, unsigned int devad, u16 addr,
			 u16 *value_out, u32 *status_out)
{
	u8 inbuf[MC_CMD_MDIO_READ_IN_LEN];
	u8 outbuf[MC_CMD_MDIO_READ_OUT_LEN];
	size_t outlen;
	int rc;

	MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, bus);
	MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad);
	MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad);
	MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr);

	rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf),
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;

	*value_out = (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE);
	*status_out = MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS);
	return 0;

fail:
	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
	return rc;
}

int efx_mcdi_mdio_write(struct efx_nic *efx, unsigned int bus,
			  unsigned int prtad, unsigned int devad, u16 addr,
			  u16 value, u32 *status_out)
{
	u8 inbuf[MC_CMD_MDIO_WRITE_IN_LEN];
	u8 outbuf[MC_CMD_MDIO_WRITE_OUT_LEN];
	size_t outlen;
	int rc;

	MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, bus);
	MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad);
	MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad);
	MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr);
	MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value);

	rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf),
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;

	*status_out = MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS);
	return 0;

fail:
	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
	return rc;
}

static u32 mcdi_to_ethtool_cap(u32 media, u32 cap)
{
	u32 result = 0;

	switch (media) {
	case MC_CMD_MEDIA_KX4:
		result |= SUPPORTED_Backplane;
		if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
			result |= SUPPORTED_1000baseKX_Full;
		if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
			result |= SUPPORTED_10000baseKX4_Full;
		break;

	case MC_CMD_MEDIA_XFP:
	case MC_CMD_MEDIA_SFP_PLUS:
		result |= SUPPORTED_FIBRE;
		break;

	case MC_CMD_MEDIA_BASE_T:
		result |= SUPPORTED_TP;
		if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
			result |= SUPPORTED_10baseT_Half;
		if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
			result |= SUPPORTED_10baseT_Full;
		if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
			result |= SUPPORTED_100baseT_Half;
		if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
			result |= SUPPORTED_100baseT_Full;
		if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
			result |= SUPPORTED_1000baseT_Half;
		if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
			result |= SUPPORTED_1000baseT_Full;
		if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
			result |= SUPPORTED_10000baseT_Full;
		break;
	}

	if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
		result |= SUPPORTED_Pause;
	if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
		result |= SUPPORTED_Asym_Pause;
	if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
		result |= SUPPORTED_Autoneg;

	return result;
}

static u32 ethtool_to_mcdi_cap(u32 cap)
{
	u32 result = 0;

	if (cap & SUPPORTED_10baseT_Half)
		result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
	if (cap & SUPPORTED_10baseT_Full)
		result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
	if (cap & SUPPORTED_100baseT_Half)
		result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
	if (cap & SUPPORTED_100baseT_Full)
		result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
	if (cap & SUPPORTED_1000baseT_Half)
		result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
	if (cap & (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseKX_Full))
		result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
	if (cap & (SUPPORTED_10000baseT_Full | SUPPORTED_10000baseKX4_Full))
		result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
	if (cap & SUPPORTED_Pause)
		result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
	if (cap & SUPPORTED_Asym_Pause)
		result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
	if (cap & SUPPORTED_Autoneg)
		result |= (1 << MC_CMD_PHY_CAP_AN_LBN);

	return result;
}

static u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
{
	struct efx_mcdi_phy_cfg *phy_cfg = efx->phy_data;
	enum efx_phy_mode mode, supported;
	u32 flags;

	/* TODO: Advertise the capabilities supported by this PHY */
	supported = 0;
	if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_TXDIS_LBN))
		supported |= PHY_MODE_TX_DISABLED;
	if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_LOWPOWER_LBN))
		supported |= PHY_MODE_LOW_POWER;
	if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_POWEROFF_LBN))
		supported |= PHY_MODE_OFF;

	mode = efx->phy_mode & supported;

	flags = 0;
	if (mode & PHY_MODE_TX_DISABLED)
		flags |= (1 << MC_CMD_SET_LINK_TXDIS_LBN);
	if (mode & PHY_MODE_LOW_POWER)
		flags |= (1 << MC_CMD_SET_LINK_LOWPOWER_LBN);
	if (mode & PHY_MODE_OFF)
		flags |= (1 << MC_CMD_SET_LINK_POWEROFF_LBN);

	return flags;
}

static u32 mcdi_to_ethtool_media(u32 media)
{
	switch (media) {
	case MC_CMD_MEDIA_XAUI:
	case MC_CMD_MEDIA_CX4:
	case MC_CMD_MEDIA_KX4:
		return PORT_OTHER;

	case MC_CMD_MEDIA_XFP:
	case MC_CMD_MEDIA_SFP_PLUS:
		return PORT_FIBRE;

	case MC_CMD_MEDIA_BASE_T:
		return PORT_TP;

	default:
		return PORT_OTHER;
	}
}

static int efx_mcdi_phy_probe(struct efx_nic *efx)
{
	struct efx_mcdi_phy_cfg *phy_data;
	u8 outbuf[MC_CMD_GET_LINK_OUT_LEN];
	u32 caps;
	int rc;

	/* Initialise and populate phy_data */
	phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
	if (phy_data == NULL)
		return -ENOMEM;

	rc = efx_mcdi_get_phy_cfg(efx, phy_data);
	if (rc != 0)
		goto fail;

	/* Read initial link advertisement */
	BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
	rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
			  outbuf, sizeof(outbuf), NULL);
	if (rc)
		goto fail;

	/* Fill out nic state */
	efx->phy_data = phy_data;
	efx->phy_type = phy_data->type;

	efx->mdio_bus = phy_data->channel;
	efx->mdio.prtad = phy_data->port;
	efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22);
	efx->mdio.mode_support = 0;
	if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22))
		efx->mdio.mode_support |= MDIO_SUPPORTS_C22;
	if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22))
		efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;

	caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
	if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
		efx->link_advertising =
			mcdi_to_ethtool_cap(phy_data->media, caps);
	else
		phy_data->forced_cap = caps;

	/* Assert that we can map efx -> mcdi loopback modes */
	BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE);
	BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA);
	BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC);
	BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII);
	BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS);
	BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI);
	BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII);
	BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII);
	BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR);
	BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI);
	BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR);
	BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR);
	BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR);
	BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR);
	BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY);
	BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS);
	BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS);
	BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD);
	BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT);
	BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS);
	BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS);
	BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR);
	BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR);
	BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS);
	BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS);
	BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR);
	BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS);

	rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes);
	if (rc != 0)
		goto fail;
	/* The MC indicates that LOOPBACK_NONE is a valid loopback mode,
	 * but by convention we don't */
	efx->loopback_modes &= ~(1 << LOOPBACK_NONE);

	return 0;

fail:
	kfree(phy_data);
	return rc;
}

int efx_mcdi_phy_reconfigure(struct efx_nic *efx)
{
	struct efx_mcdi_phy_cfg *phy_cfg = efx->phy_data;
	u32 caps = (efx->link_advertising ?
		    ethtool_to_mcdi_cap(efx->link_advertising) :
		    phy_cfg->forced_cap);

	return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
				 efx->loopback_mode, 0);
}

void efx_mcdi_phy_decode_link(struct efx_nic *efx,
			      struct efx_link_state *link_state,
			      u32 speed, u32 flags, u32 fcntl)
{
	switch (fcntl) {
	case MC_CMD_FCNTL_AUTO:
		WARN_ON(1);	/* This is not a link mode */
		link_state->fc = EFX_FC_AUTO | EFX_FC_TX | EFX_FC_RX;
		break;
	case MC_CMD_FCNTL_BIDIR:
		link_state->fc = EFX_FC_TX | EFX_FC_RX;
		break;
	case MC_CMD_FCNTL_RESPOND:
		link_state->fc = EFX_FC_RX;
		break;
	default:
		WARN_ON(1);
	case MC_CMD_FCNTL_OFF:
		link_state->fc = 0;
		break;
	}

	link_state->up = !!(flags & (1 << MC_CMD_GET_LINK_LINK_UP_LBN));
	link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_FULL_DUPLEX_LBN));
	link_state->speed = speed;
}

/* Verify that the forced flow control settings (!EFX_FC_AUTO) are
 * supported by the link partner. Warn the user if this isn't the case
 */
void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa)
{
	struct efx_mcdi_phy_cfg *phy_cfg = efx->phy_data;
	u32 rmtadv;

	/* The link partner capabilities are only relevent if the
	 * link supports flow control autonegotiation */
	if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
		return;

	/* If flow control autoneg is supported and enabled, then fine */
	if (efx->wanted_fc & EFX_FC_AUTO)
		return;

	rmtadv = 0;
	if (lpa & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
		rmtadv |= ADVERTISED_Pause;
	if (lpa & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
		rmtadv |=  ADVERTISED_Asym_Pause;

	if ((efx->wanted_fc & EFX_FC_TX) && rmtadv == ADVERTISED_Asym_Pause)
		EFX_ERR(efx, "warning: link partner doesn't support "
			"pause frames");
}

static bool efx_mcdi_phy_poll(struct efx_nic *efx)
{
	struct efx_link_state old_state = efx->link_state;
	u8 outbuf[MC_CMD_GET_LINK_OUT_LEN];
	int rc;

	WARN_ON(!mutex_is_locked(&efx->mac_lock));

	BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);

	rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
			  outbuf, sizeof(outbuf), NULL);
	if (rc) {
		EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
		efx->link_state.up = false;
	} else {
		efx_mcdi_phy_decode_link(
			efx, &efx->link_state,
			MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
			MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
			MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
	}

	return !efx_link_state_equal(&efx->link_state, &old_state);
}

static void efx_mcdi_phy_remove(struct efx_nic *efx)
{
	struct efx_mcdi_phy_data *phy_data = efx->phy_data;

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

static void efx_mcdi_phy_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
	struct efx_mcdi_phy_cfg *phy_cfg = efx->phy_data;
	u8 outbuf[MC_CMD_GET_LINK_OUT_LEN];
	int rc;

	ecmd->supported =
		mcdi_to_ethtool_cap(phy_cfg->media, phy_cfg->supported_cap);
	ecmd->advertising = efx->link_advertising;
	ecmd->speed = efx->link_state.speed;
	ecmd->duplex = efx->link_state.fd;
	ecmd->port = mcdi_to_ethtool_media(phy_cfg->media);
	ecmd->phy_address = phy_cfg->port;
	ecmd->transceiver = XCVR_INTERNAL;
	ecmd->autoneg = !!(efx->link_advertising & ADVERTISED_Autoneg);
	ecmd->mdio_support = (efx->mdio.mode_support &
			      (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));

	BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
	rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
			  outbuf, sizeof(outbuf), NULL);
	if (rc) {
		EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
		return;
	}
	ecmd->lp_advertising =
		mcdi_to_ethtool_cap(phy_cfg->media,
				    MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP));
}

static int efx_mcdi_phy_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
	struct efx_mcdi_phy_cfg *phy_cfg = efx->phy_data;
	u32 caps;
	int rc;

	if (ecmd->autoneg) {
		caps = (ethtool_to_mcdi_cap(ecmd->advertising) |
			 1 << MC_CMD_PHY_CAP_AN_LBN);
	} else if (ecmd->duplex) {
		switch (ecmd->speed) {
		case 10:    caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN;    break;
		case 100:   caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN;   break;
		case 1000:  caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN;  break;
		case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break;
		default:    return -EINVAL;
		}
	} else {
		switch (ecmd->speed) {
		case 10:    caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN;    break;
		case 100:   caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN;   break;
		case 1000:  caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN;  break;
		default:    return -EINVAL;
		}
	}

	rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
			       efx->loopback_mode, 0);
	if (rc)
		return rc;

	if (ecmd->autoneg) {
		efx_link_set_advertising(
			efx, ecmd->advertising | ADVERTISED_Autoneg);
		phy_cfg->forced_cap = 0;
	} else {
		efx_link_set_advertising(efx, 0);
		phy_cfg->forced_cap = caps;
	}
	return 0;
}

struct efx_phy_operations efx_mcdi_phy_ops = {
	.probe		= efx_mcdi_phy_probe,
	.init 	 	= efx_port_dummy_op_int,
	.reconfigure	= efx_mcdi_phy_reconfigure,
	.poll		= efx_mcdi_phy_poll,
	.fini		= efx_port_dummy_op_void,
	.remove		= efx_mcdi_phy_remove,
	.get_settings	= efx_mcdi_phy_get_settings,
	.set_settings	= efx_mcdi_phy_set_settings,
	.run_tests	= NULL,
	.test_name	= NULL,
};
Commit	Line	Data
afd4aea0 BH	1	/****************************************************************************
	2	* Driver for Solarflare Solarstorm network controllers and boards
	3	* Copyright 2009 Solarflare Communications Inc.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published
	7	* by the Free Software Foundation, incorporated herein by reference.
	8	*/
	9
	10	/*
	11	* Driver for PHY related operations via MCDI.
	12	*/
	13
	14	#include "efx.h"
	15	#include "phy.h"
	16	#include "mcdi.h"
	17	#include "mcdi_pcol.h"
	18	#include "mdio_10g.h"
	19
	20	struct efx_mcdi_phy_cfg {
	21	u32 flags;
	22	u32 type;
	23	u32 supported_cap;
	24	u32 channel;
	25	u32 port;
	26	u32 stats_mask;
	27	u8 name[20];
	28	u32 media;
	29	u32 mmd_mask;
	30	u8 revision[20];
	31	u32 forced_cap;
	32	};
	33
	34	static int
	35	efx_mcdi_get_phy_cfg(struct efx_nic efx, struct efx_mcdi_phy_cfg cfg)
	36	{
	37	u8 outbuf[MC_CMD_GET_PHY_CFG_OUT_LEN];
	38	size_t outlen;
	39	int rc;
	40
	41	BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_IN_LEN != 0);
	42	BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_OUT_NAME_LEN != sizeof(cfg->name));
	43
	44	rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_CFG, NULL, 0,
	45	outbuf, sizeof(outbuf), &outlen);
	46	if (rc)
	47	goto fail;
	48
	49	if (outlen < MC_CMD_GET_PHY_CFG_OUT_LEN) {
	50	rc = -EMSGSIZE;
	51	goto fail;
	52	}
	53
	54	cfg->flags = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_FLAGS);
	55	cfg->type = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_TYPE);
	56	cfg->supported_cap =
	57	MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_SUPPORTED_CAP);
	58	cfg->channel = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_CHANNEL);
	59	cfg->port = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_PRT);
	60	cfg->stats_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_STATS_MASK);
	61	memcpy(cfg->name, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_NAME),
	62	sizeof(cfg->name));
	63	cfg->media = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MEDIA_TYPE);
	64	cfg->mmd_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MMD_MASK);
65	memcpy(cfg->revision, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_REVISION),
66	sizeof(cfg->revision));
67
68	return 0;
69
70	fail:
71	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
72	return rc;
73	}
74
75	static int efx_mcdi_set_link(struct efx_nic *efx, u32 capabilities,
76	u32 flags, u32 loopback_mode,
77	u32 loopback_speed)
78	{
79	u8 inbuf[MC_CMD_SET_LINK_IN_LEN];
80	int rc;
81
82	BUILD_BUG_ON(MC_CMD_SET_LINK_OUT_LEN != 0);
83
84	MCDI_SET_DWORD(inbuf, SET_LINK_IN_CAP, capabilities);
85	MCDI_SET_DWORD(inbuf, SET_LINK_IN_FLAGS, flags);
86	MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_MODE, loopback_mode);
87	MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_SPEED, loopback_speed);
88
89	rc = efx_mcdi_rpc(efx, MC_CMD_SET_LINK, inbuf, sizeof(inbuf),
90	NULL, 0, NULL);
91	if (rc)
92	goto fail;
93
94	return 0;
95
96	fail:
97	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
98	return rc;
99	}
100
101	static int efx_mcdi_loopback_modes(struct efx_nic efx, u64 loopback_modes)
102	{
103	u8 outbuf[MC_CMD_GET_LOOPBACK_MODES_OUT_LEN];
104	size_t outlen;
105	int rc;
106
107	rc = efx_mcdi_rpc(efx, MC_CMD_GET_LOOPBACK_MODES, NULL, 0,
108	outbuf, sizeof(outbuf), &outlen);
109	if (rc)
110	goto fail;
111
112	if (outlen < MC_CMD_GET_LOOPBACK_MODES_OUT_LEN) {
113	rc = -EMSGSIZE;
114	goto fail;
115	}
116
117	*loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_SUGGESTED);
118
119	return 0;
120
121	fail:
122	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
123	return rc;
124	}
125
126	int efx_mcdi_mdio_read(struct efx_nic *efx, unsigned int bus,
127	unsigned int prtad, unsigned int devad, u16 addr,
128	u16 value_out, u32 status_out)
129	{
130	u8 inbuf[MC_CMD_MDIO_READ_IN_LEN];
131	u8 outbuf[MC_CMD_MDIO_READ_OUT_LEN];
132	size_t outlen;
133	int rc;
134
135	MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, bus);
136	MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad);
137	MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad);
138	MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr);
139
140	rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf),
141	outbuf, sizeof(outbuf), &outlen);
142	if (rc)
143	goto fail;
144
145	*value_out = (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE);
146	*status_out = MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS);
147	return 0;
148
149	fail:
150	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
151	return rc;
152	}
153
154	int efx_mcdi_mdio_write(struct efx_nic *efx, unsigned int bus,
155	unsigned int prtad, unsigned int devad, u16 addr,
156	u16 value, u32 *status_out)
157	{
158	u8 inbuf[MC_CMD_MDIO_WRITE_IN_LEN];
159	u8 outbuf[MC_CMD_MDIO_WRITE_OUT_LEN];
160	size_t outlen;
161	int rc;
162
163	MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, bus);
164	MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad);
165	MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad);
166	MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr);
167	MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value);
168
169	rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf),
170	outbuf, sizeof(outbuf), &outlen);
171	if (rc)
172	goto fail;
173
174	*status_out = MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS);
175	return 0;
176
177	fail:
178	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
179	return rc;
180	}
181
182	static u32 mcdi_to_ethtool_cap(u32 media, u32 cap)
183	{
184	u32 result = 0;
185
186	switch (media) {
187	case MC_CMD_MEDIA_KX4:
188	result \|= SUPPORTED_Backplane;
189	if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
190	result \|= SUPPORTED_1000baseKX_Full;
191	if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
192	result \|= SUPPORTED_10000baseKX4_Full;
193	break;
194
195	case MC_CMD_MEDIA_XFP:
196	case MC_CMD_MEDIA_SFP_PLUS:
197	result \|= SUPPORTED_FIBRE;
198	break;
199
200	case MC_CMD_MEDIA_BASE_T:
201	result \|= SUPPORTED_TP;
202	if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
203	result \|= SUPPORTED_10baseT_Half;
204	if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
205	result \|= SUPPORTED_10baseT_Full;
206	if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
207	result \|= SUPPORTED_100baseT_Half;
208	if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
209	result \|= SUPPORTED_100baseT_Full;
210	if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
211	result \|= SUPPORTED_1000baseT_Half;
212	if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
213	result \|= SUPPORTED_1000baseT_Full;
214	if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
215	result \|= SUPPORTED_10000baseT_Full;
216	break;
217	}
218
219	if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
220	result \|= SUPPORTED_Pause;
221	if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
222	result \|= SUPPORTED_Asym_Pause;
223	if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
224	result \|= SUPPORTED_Autoneg;
225
226	return result;
227	}
228
229	static u32 ethtool_to_mcdi_cap(u32 cap)
230	{
231	u32 result = 0;
232
233	if (cap & SUPPORTED_10baseT_Half)
234	result \|= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
235	if (cap & SUPPORTED_10baseT_Full)
236	result \|= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
237	if (cap & SUPPORTED_100baseT_Half)
238	result \|= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
239	if (cap & SUPPORTED_100baseT_Full)
240	result \|= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
241	if (cap & SUPPORTED_1000baseT_Half)
242	result \|= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
243	if (cap & (SUPPORTED_1000baseT_Full \| SUPPORTED_1000baseKX_Full))
244	result \|= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
245	if (cap & (SUPPORTED_10000baseT_Full \| SUPPORTED_10000baseKX4_Full))
246	result \|= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
247	if (cap & SUPPORTED_Pause)
248	result \|= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
249	if (cap & SUPPORTED_Asym_Pause)
250	result \|= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
251	if (cap & SUPPORTED_Autoneg)
252	result \|= (1 << MC_CMD_PHY_CAP_AN_LBN);
253
254	return result;
255	}
256
257	static u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
258	{
259	struct efx_mcdi_phy_cfg *phy_cfg = efx->phy_data;
260	enum efx_phy_mode mode, supported;
261	u32 flags;
262
263	/* TODO: Advertise the capabilities supported by this PHY */
264	supported = 0;
265	if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_TXDIS_LBN))
266	supported \|= PHY_MODE_TX_DISABLED;
267	if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_LOWPOWER_LBN))
268	supported \|= PHY_MODE_LOW_POWER;
269	if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_POWEROFF_LBN))
270	supported \|= PHY_MODE_OFF;
271
272	mode = efx->phy_mode & supported;
273
274	flags = 0;
275	if (mode & PHY_MODE_TX_DISABLED)
276	flags \|= (1 << MC_CMD_SET_LINK_TXDIS_LBN);
277	if (mode & PHY_MODE_LOW_POWER)
278	flags \|= (1 << MC_CMD_SET_LINK_LOWPOWER_LBN);
279	if (mode & PHY_MODE_OFF)
280	flags \|= (1 << MC_CMD_SET_LINK_POWEROFF_LBN);
281
282	return flags;
283	}
284
285	static u32 mcdi_to_ethtool_media(u32 media)
286	{
287	switch (media) {
288	case MC_CMD_MEDIA_XAUI:
289	case MC_CMD_MEDIA_CX4:
290	case MC_CMD_MEDIA_KX4:
291	return PORT_OTHER;
292
293	case MC_CMD_MEDIA_XFP:
294	case MC_CMD_MEDIA_SFP_PLUS:
295	return PORT_FIBRE;
296
297	case MC_CMD_MEDIA_BASE_T:
298	return PORT_TP;
299
300	default:
301	return PORT_OTHER;
302	}
303	}
304
305	static int efx_mcdi_phy_probe(struct efx_nic *efx)
306	{
ff3b00a0 SH	307	struct efx_mcdi_phy_cfg *phy_data;
	308	u8 outbuf[MC_CMD_GET_LINK_OUT_LEN];
	309	u32 caps;
afd4aea0 BH	310	int rc;
afd4aea0 BH	311
ff3b00a0 SH	312	/* Initialise and populate phy_data */
	313	phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
	314	if (phy_data == NULL)
	315	return -ENOMEM;
	316
	317	rc = efx_mcdi_get_phy_cfg(efx, phy_data);
afd4aea0 BH	318	if (rc != 0)
	319	goto fail;
	320
ff3b00a0 SH	321	/* Read initial link advertisement */
	322	BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
	323	rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
	324	outbuf, sizeof(outbuf), NULL);
	325	if (rc)
	326	goto fail;
	327
	328	/* Fill out nic state */
	329	efx->phy_data = phy_data;
	330	efx->phy_type = phy_data->type;
afd4aea0	331
ff3b00a0 SH	332	efx->mdio_bus = phy_data->channel;
	333	efx->mdio.prtad = phy_data->port;
	334	efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22);
afd4aea0	335	efx->mdio.mode_support = 0;
ff3b00a0	336	if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22))
afd4aea0	337	efx->mdio.mode_support \|= MDIO_SUPPORTS_C22;
ff3b00a0	338	if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22))
afd4aea0 BH	339	efx->mdio.mode_support \|= MDIO_SUPPORTS_C45 \| MDIO_EMULATE_C22;
afd4aea0 BH	340
ff3b00a0 SH	341	caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
	342	if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
	343	efx->link_advertising =
	344	mcdi_to_ethtool_cap(phy_data->media, caps);
	345	else
	346	phy_data->forced_cap = caps;
	347
afd4aea0 BH	348	/* Assert that we can map efx -> mcdi loopback modes */
	349	BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE);
	350	BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA);
	351	BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC);
	352	BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII);
	353	BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS);
	354	BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI);
	355	BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII);
	356	BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII);
	357	BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR);
	358	BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI);
	359	BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR);
	360	BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR);
	361	BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR);
	362	BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR);
	363	BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY);
	364	BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS);
	365	BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS);
	366	BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD);
	367	BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT);
	368	BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS);
	369	BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS);
	370	BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR);
	371	BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR);
	372	BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS);
	373	BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS);
	374	BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR);
	375	BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS);
	376
	377	rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes);
	378	if (rc != 0)
	379	goto fail;
	380	/* The MC indicates that LOOPBACK_NONE is a valid loopback mode,
	381	* but by convention we don't */
	382	efx->loopback_modes &= ~(1 << LOOPBACK_NONE);
	383
afd4aea0 BH	384	return 0;
	385
	386	fail:
	387	kfree(phy_data);
	388	return rc;
	389	}
	390
	391	int efx_mcdi_phy_reconfigure(struct efx_nic *efx)
	392	{
	393	struct efx_mcdi_phy_cfg *phy_cfg = efx->phy_data;
	394	u32 caps = (efx->link_advertising ?
	395	ethtool_to_mcdi_cap(efx->link_advertising) :
	396	phy_cfg->forced_cap);
	397
	398	return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
	399	efx->loopback_mode, 0);
	400	}
	401
	402	void efx_mcdi_phy_decode_link(struct efx_nic *efx,
	403	struct efx_link_state *link_state,
	404	u32 speed, u32 flags, u32 fcntl)
	405	{
	406	switch (fcntl) {
	407	case MC_CMD_FCNTL_AUTO:
	408	WARN_ON(1); /* This is not a link mode */
	409	link_state->fc = EFX_FC_AUTO \| EFX_FC_TX \| EFX_FC_RX;
	410	break;
	411	case MC_CMD_FCNTL_BIDIR:
	412	link_state->fc = EFX_FC_TX \| EFX_FC_RX;
	413	break;
	414	case MC_CMD_FCNTL_RESPOND:
	415	link_state->fc = EFX_FC_RX;
	416	break;
	417	default:
	418	WARN_ON(1);
	419	case MC_CMD_FCNTL_OFF:
	420	link_state->fc = 0;
	421	break;
	422	}
	423
	424	link_state->up = !!(flags & (1 << MC_CMD_GET_LINK_LINK_UP_LBN));
	425	link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_FULL_DUPLEX_LBN));
	426	link_state->speed = speed;
	427	}
	428
	429	/* Verify that the forced flow control settings (!EFX_FC_AUTO) are
	430	* supported by the link partner. Warn the user if this isn't the case
	431	*/
	432	void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa)
	433	{
	434	struct efx_mcdi_phy_cfg *phy_cfg = efx->phy_data;
	435	u32 rmtadv;
	436
	437	/* The link partner capabilities are only relevent if the
	438	* link supports flow control autonegotiation */
	439	if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
	440	return;
	441
	442	/* If flow control autoneg is supported and enabled, then fine */
	443	if (efx->wanted_fc & EFX_FC_AUTO)
	444	return;
	445
	446	rmtadv = 0;
	447	if (lpa & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
448	rmtadv \|= ADVERTISED_Pause;
449	if (lpa & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
450	rmtadv \|= ADVERTISED_Asym_Pause;
451
452	if ((efx->wanted_fc & EFX_FC_TX) && rmtadv == ADVERTISED_Asym_Pause)
453	EFX_ERR(efx, "warning: link partner doesn't support "
454	"pause frames");
455	}
456
457	static bool efx_mcdi_phy_poll(struct efx_nic *efx)
458	{
459	struct efx_link_state old_state = efx->link_state;
460	u8 outbuf[MC_CMD_GET_LINK_OUT_LEN];
461	int rc;
462
463	WARN_ON(!mutex_is_locked(&efx->mac_lock));
464
465	BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
466
467	rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
468	outbuf, sizeof(outbuf), NULL);
469	if (rc) {
470	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
471	efx->link_state.up = false;
472	} else {
473	efx_mcdi_phy_decode_link(
474	efx, &efx->link_state,
475	MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
476	MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
477	MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
478	}
479
480	return !efx_link_state_equal(&efx->link_state, &old_state);
481	}
482
ff3b00a0	483	static void efx_mcdi_phy_remove(struct efx_nic *efx)
afd4aea0 BH	484	{
	485	struct efx_mcdi_phy_data *phy_data = efx->phy_data;
	486
	487	efx->phy_data = NULL;
	488	kfree(phy_data);
	489	}
	490
	491	static void efx_mcdi_phy_get_settings(struct efx_nic efx, struct ethtool_cmd ecmd)
	492	{
	493	struct efx_mcdi_phy_cfg *phy_cfg = efx->phy_data;
	494	u8 outbuf[MC_CMD_GET_LINK_OUT_LEN];
	495	int rc;
	496
	497	ecmd->supported =
	498	mcdi_to_ethtool_cap(phy_cfg->media, phy_cfg->supported_cap);
	499	ecmd->advertising = efx->link_advertising;
	500	ecmd->speed = efx->link_state.speed;
	501	ecmd->duplex = efx->link_state.fd;
	502	ecmd->port = mcdi_to_ethtool_media(phy_cfg->media);
	503	ecmd->phy_address = phy_cfg->port;
	504	ecmd->transceiver = XCVR_INTERNAL;
	505	ecmd->autoneg = !!(efx->link_advertising & ADVERTISED_Autoneg);
	506	ecmd->mdio_support = (efx->mdio.mode_support &
	507	(MDIO_SUPPORTS_C45 \| MDIO_SUPPORTS_C22));
	508
	509	BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
	510	rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
	511	outbuf, sizeof(outbuf), NULL);
	512	if (rc) {
	513	EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
	514	return;
	515	}
	516	ecmd->lp_advertising =
	517	mcdi_to_ethtool_cap(phy_cfg->media,
	518	MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP));
	519	}
	520
	521	static int efx_mcdi_phy_set_settings(struct efx_nic efx, struct ethtool_cmd ecmd)
	522	{
	523	struct efx_mcdi_phy_cfg *phy_cfg = efx->phy_data;
	524	u32 caps;
	525	int rc;
	526
	527	if (ecmd->autoneg) {
	528	caps = (ethtool_to_mcdi_cap(ecmd->advertising) \|
	529	1 << MC_CMD_PHY_CAP_AN_LBN);
	530	} else if (ecmd->duplex) {
	531	switch (ecmd->speed) {
	532	case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break;
	533	case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break;
	534	case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break;
	535	case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break;
	536	default: return -EINVAL;
	537	}
	538	} else {
	539	switch (ecmd->speed) {
	540	case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break;
	541	case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break;
	542	case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break;
	543	default: return -EINVAL;
	544	}
	545	}
	546
	547	rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
548	efx->loopback_mode, 0);
549	if (rc)
550	return rc;
551
552	if (ecmd->autoneg) {
553	efx_link_set_advertising(
554	efx, ecmd->advertising \| ADVERTISED_Autoneg);
555	phy_cfg->forced_cap = 0;
556	} else {
557	efx_link_set_advertising(efx, 0);
558	phy_cfg->forced_cap = caps;
559	}
560	return 0;
561	}
562
563	struct efx_phy_operations efx_mcdi_phy_ops = {
564	.probe = efx_mcdi_phy_probe,
ff3b00a0	565	.init = efx_port_dummy_op_int,
afd4aea0 BH	566	.reconfigure = efx_mcdi_phy_reconfigure,
afd4aea0 BH	567	.poll = efx_mcdi_phy_poll,
ff3b00a0 SH	568	.fini = efx_port_dummy_op_void,
ff3b00a0 SH	569	.remove = efx_mcdi_phy_remove,
afd4aea0 BH	570	.get_settings = efx_mcdi_phy_get_settings,
	571	.set_settings = efx_mcdi_phy_set_settings,
	572	.run_tests = NULL,
	573	.test_name = NULL,
	574	};