drivers/net/sfc/mcdi_phy.c - kernel/msm-4.19 - Gitiles

 /****************************************************************************
  * 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_cfg;
 	int rc;

 	/* TODO: Move phy_data initialisation to
 	 * phy_op->probe/remove, rather than init/fini */
 	phy_cfg = kzalloc(sizeof(*phy_cfg), GFP_KERNEL);
 	if (phy_cfg == NULL) {
 		rc = -ENOMEM;
 		goto fail_alloc;
 	}
 	rc = efx_mcdi_get_phy_cfg(efx, phy_cfg);
 	if (rc != 0)
 		goto fail;

 	efx->phy_type = phy_cfg->type;

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

 	/* 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);

 	kfree(phy_cfg);

 	return 0;

 fail:
 	kfree(phy_cfg);
 fail_alloc:
 	return rc;
 }

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

 	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;

 	efx->phy_data = phy_data;

 	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;

 	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;

 	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_fini(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_mcdi_phy_init,
 	.reconfigure	= efx_mcdi_phy_reconfigure,
 	.poll		= efx_mcdi_phy_poll,
 	.fini		= efx_mcdi_phy_fini,
 	.get_settings	= efx_mcdi_phy_get_settings,
 	.set_settings	= efx_mcdi_phy_set_settings,
 	.run_tests	= NULL,
 	.test_name	= NULL,
 };
	/****************************************************************************
	* 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_cfg;
	int rc;

	/* TODO: Move phy_data initialisation to
	* phy_op->probe/remove, rather than init/fini */
	phy_cfg = kzalloc(sizeof(*phy_cfg), GFP_KERNEL);
	if (phy_cfg == NULL) {
	rc = -ENOMEM;
	goto fail_alloc;
	}
	rc = efx_mcdi_get_phy_cfg(efx, phy_cfg);
	if (rc != 0)
	goto fail;

	efx->phy_type = phy_cfg->type;

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

	/* 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);

	kfree(phy_cfg);

	return 0;

	fail:
	kfree(phy_cfg);
	fail_alloc:
	return rc;
	}

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

	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;

	efx->phy_data = phy_data;

	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;

	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;

	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_fini(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_mcdi_phy_init,
	.reconfigure = efx_mcdi_phy_reconfigure,
	.poll = efx_mcdi_phy_poll,
	.fini = efx_mcdi_phy_fini,
	.get_settings = efx_mcdi_phy_get_settings,
	.set_settings = efx_mcdi_phy_set_settings,
	.run_tests = NULL,
	.test_name = NULL,
	};