/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2009-2013 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 <linux/slab.h>
#include "efx.h"
#include "mcdi.h"
#include "mcdi_pcol.h"
#include "nic.h"
#include "selftest.h"
struct efx_mcdi_phy_data {
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_data *cfg)
{
MCDI_DECLARE_BUF(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 = -EIO;
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:
netif_err(efx, hw, efx->net_dev, "%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)
{
MCDI_DECLARE_BUF(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);
return rc;
}
static int efx_mcdi_loopback_modes(struct efx_nic *efx, u64 *loopback_modes)
{
MCDI_DECLARE_BUF(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_SUGGESTED_OFST +
MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_LEN)) {
rc = -EIO;
goto fail;
}
*loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_OUT_SUGGESTED);
return 0;
fail:
netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
return rc;
}
static int efx_mcdi_mdio_read(struct net_device *net_dev,
int prtad, int devad, u16 addr)
{
struct efx_nic *efx = netdev_priv(net_dev);
MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_READ_IN_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_READ_OUT_LEN);
size_t outlen;
int rc;
MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, efx->mdio_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)
return rc;
if (MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS) !=
MC_CMD_MDIO_STATUS_GOOD)
return -EIO;
return (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE);
}
static int efx_mcdi_mdio_write(struct net_device *net_dev,
int prtad, int devad, u16 addr, u16 value)
{
struct efx_nic *efx = netdev_priv(net_dev);
MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_WRITE_IN_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_WRITE_OUT_LEN);
size_t outlen;
int rc;
MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, efx->mdio_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)
return rc;
if (MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS) !=
MC_CMD_MDIO_STATUS_GOOD)
return -EIO;
return 0;
}
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;
if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
result |= SUPPORTED_40000baseKR4_Full;
break;
case MC_CMD_MEDIA_XFP:
case MC_CMD_MEDIA_SFP_PLUS:
case MC_CMD_MEDIA_QSFP_PLUS:
result |= SUPPORTED_FIBRE;
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;
if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
result |= SUPPORTED_40000baseCR4_Full;
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_40000baseCR4_Full | SUPPORTED_40000baseKR4_Full))
result |= (1 << MC_CMD_PHY_CAP_40000FDX_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_data *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_OUT_TXDIS_LBN))
supported |= PHY_MODE_TX_DISABLED;
if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_LOWPOWER_LBN))
supported |= PHY_MODE_LOW_POWER;
if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_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_IN_TXDIS_LBN);
if (mode & PHY_MODE_LOW_POWER)
flags |= (1 << MC_CMD_SET_LINK_IN_LOWPOWER_LBN);
if (mode & PHY_MODE_OFF)
flags |= (1 << MC_CMD_SET_LINK_IN_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:
case MC_CMD_MEDIA_QSFP_PLUS:
return PORT_FIBRE;
case MC_CMD_MEDIA_BASE_T:
return PORT_TP;
default:
return PORT_OTHER;
}
}
static 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_OUT_LINK_UP_LBN));
link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_OUT_FULL_DUPLEX_LBN));
link_state->speed = speed;
}
static int efx_mcdi_phy_probe(struct efx_nic *efx)
{
struct efx_mcdi_phy_data *phy_data;
MCDI_DECLARE_BUF(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);
/* Set the initial link mode */
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));
/* Default to Autonegotiated flow control if the PHY supports it */
efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
efx->wanted_fc |= EFX_FC_AUTO;
efx_link_set_wanted_fc(efx, efx->wanted_fc);
return 0;
fail:
kfree(phy_data);
return rc;
}
int efx_mcdi_port_reconfigure(struct efx_nic *efx)
{
struct efx_mcdi_phy_data *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);
}
/* 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
*/
static void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa)
{
struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
u32 rmtadv;
/* The link partner capabilities are only relevant if the
* link supports flow control autonegotiation */
if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_AN_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)
netif_err(efx, link, efx->net_dev,
"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;
MCDI_DECLARE_BUF(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->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_link_ksettings(struct efx_nic *efx,
struct ethtool_link_ksettings *cmd)
{
struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
int rc;
u32 supported, advertising, lp_advertising;
supported = mcdi_to_ethtool_cap(phy_cfg->media, phy_cfg->supported_cap);
advertising = efx->link_advertising;
cmd->base.speed = efx->link_state.speed;
cmd->base.duplex = efx->link_state.fd;
cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media);
cmd->base.phy_address = phy_cfg->port;
cmd->base.autoneg = !!(efx->link_advertising & ADVERTISED_Autoneg);
cmd->base.mdio_support = (efx->mdio.mode_support &
(MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
supported);
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
advertising);
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)
return;
lp_advertising =
mcdi_to_ethtool_cap(phy_cfg->media,
MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP));
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
lp_advertising);
}
static int
efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx,
const struct ethtool_link_ksettings *cmd)
{
struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
u32 caps;
int rc;
u32 advertising;
ethtool_convert_link_mode_to_legacy_u32(&advertising,
cmd->link_modes.advertising);
if (cmd->base.autoneg) {
caps = (ethtool_to_mcdi_cap(advertising) |
1 << MC_CMD_PHY_CAP_AN_LBN);
} else if (cmd->base.duplex) {
switch (cmd->base.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;
case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break;
default: return -EINVAL;
}
} else {
switch (cmd->base.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 (cmd->base.autoneg) {
efx_link_set_advertising(
efx, advertising | ADVERTISED_Autoneg);
phy_cfg->forced_cap = 0;
} else {
efx_link_set_advertising(efx, 0);
phy_cfg->forced_cap = caps;
}
return 0;
}
static int efx_mcdi_phy_test_alive(struct efx_nic *efx)
{
MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_STATE_OUT_LEN);
size_t outlen;
int rc;
BUILD_BUG_ON(MC_CMD_GET_PHY_STATE_IN_LEN != 0);
rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_STATE, NULL, 0,
outbuf, sizeof(outbuf), &outlen);
if (rc)
return rc;
if (outlen < MC_CMD_GET_PHY_STATE_OUT_LEN)
return -EIO;
if (MCDI_DWORD(outbuf, GET_PHY_STATE_OUT_STATE) != MC_CMD_PHY_STATE_OK)
return -EINVAL;
return 0;
}
static const char *const mcdi_sft9001_cable_diag_names[] = {
"cable.pairA.length",
"cable.pairB.length",
"cable.pairC.length",
"cable.pairD.length",
"cable.pairA.status",
"cable.pairB.status",
"cable.pairC.status",
"cable.pairD.status",
};
static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode,
int *results)
{
unsigned int retry, i, count = 0;
size_t outlen;
u32 status;
MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN);
u8 *ptr;
int rc;
BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0);
MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode);
rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST,
inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL);
if (rc)
goto out;
/* Wait up to 10s for BIST to finish */
for (retry = 0; retry < 100; ++retry) {
BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0);
rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0,
outbuf, sizeof(outbuf), &outlen);
if (rc)
goto out;
status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT);
if (status != MC_CMD_POLL_BIST_RUNNING)
goto finished;
msleep(100);
}
rc = -ETIMEDOUT;
goto out;
finished:
results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1;
/* SFT9001 specific cable diagnostics output */
if (efx->phy_type == PHY_TYPE_SFT9001B &&
(bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT ||
bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) {
ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A);
if (status == MC_CMD_POLL_BIST_PASSED &&
outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) {
for (i = 0; i < 8; i++) {
results[count + i] =
EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i],
EFX_DWORD_0);
}
}
count += 8;
}
rc = count;
out:
return rc;
}
static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results,
unsigned flags)
{
struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
u32 mode;
int rc;
if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results);
if (rc < 0)
return rc;
results += rc;
}
/* If we support both LONG and SHORT, then run each in response to
* break or not. Otherwise, run the one we support */
mode = 0;
if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) {
if ((flags & ETH_TEST_FL_OFFLINE) &&
(phy_cfg->flags &
(1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)))
mode = MC_CMD_PHY_BIST_CABLE_LONG;
else
mode = MC_CMD_PHY_BIST_CABLE_SHORT;
} else if (phy_cfg->flags &
(1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))
mode = MC_CMD_PHY_BIST_CABLE_LONG;
if (mode != 0) {
rc = efx_mcdi_bist(efx, mode, results);
if (rc < 0)
return rc;
results += rc;
}
return 0;
}
static const char *efx_mcdi_phy_test_name(struct efx_nic *efx,
unsigned int index)
{
struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
if (index == 0)
return "bist";
--index;
}
if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) |
(1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) {
if (index == 0)
return "cable";
--index;
if (efx->phy_type == PHY_TYPE_SFT9001B) {
if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names))
return mcdi_sft9001_cable_diag_names[index];
index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names);
}
}
return NULL;
}
#define SFP_PAGE_SIZE 128
#define SFF_DIAG_TYPE_OFFSET 92
#define SFF_DIAG_ADDR_CHANGE BIT(2)
#define SFF_8079_NUM_PAGES 2
#define SFF_8472_NUM_PAGES 4
#define SFF_8436_NUM_PAGES 5
#define SFF_DMT_LEVEL_OFFSET 94
/** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom
* @efx: NIC context
* @page: EEPROM page number
* @data: Destination data pointer
* @offset: Offset in page to copy from in to data
* @space: Space available in data
*
* Return:
* >=0 - amount of data copied
* <0 - error
*/
static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx,
unsigned int page,
u8 *data, ssize_t offset,
ssize_t space)
{
MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
size_t outlen;
unsigned int payload_len;
unsigned int to_copy;
int rc;
if (offset > SFP_PAGE_SIZE)
return -EINVAL;
to_copy = min(space, SFP_PAGE_SIZE - offset);
MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO,
inbuf, sizeof(inbuf),
outbuf, sizeof(outbuf),
&outlen);
if (rc)
return rc;
if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
SFP_PAGE_SIZE))
return -EIO;
payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN);
if (payload_len != SFP_PAGE_SIZE)
return -EIO;
memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset,
to_copy);
return to_copy;
}
static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx,
unsigned int page,
u8 byte)
{
int rc;
u8 data;
rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1);
if (rc == 1)
return data;
return rc;
}
static int efx_mcdi_phy_diag_type(struct efx_nic *efx)
{
/* Page zero of the EEPROM includes the diagnostic type at byte 92. */
return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
SFF_DIAG_TYPE_OFFSET);
}
static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx)
{
/* Page zero of the EEPROM includes the DMT level at byte 94. */
return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
SFF_DMT_LEVEL_OFFSET);
}
static u32 efx_mcdi_phy_module_type(struct efx_nic *efx)
{
struct efx_mcdi_phy_data *phy_data = efx->phy_data;
if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS)
return phy_data->media;
/* A QSFP+ NIC may actually have an SFP+ module attached.
* The ID is page 0, byte 0.
*/
switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) {
case 0x3:
return MC_CMD_MEDIA_SFP_PLUS;
case 0xc:
case 0xd:
return MC_CMD_MEDIA_QSFP_PLUS;
default:
return 0;
}
}
static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
struct ethtool_eeprom *ee, u8 *data)
{
int rc;
ssize_t space_remaining = ee->len;
unsigned int page_off;
bool ignore_missing;
int num_pages;
int page;
switch (efx_mcdi_phy_module_type(efx)) {
case MC_CMD_MEDIA_SFP_PLUS:
num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ?
SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES;
page = 0;
ignore_missing = false;
break;
case MC_CMD_MEDIA_QSFP_PLUS:
num_pages = SFF_8436_NUM_PAGES;
page = -1; /* We obtain the lower page by asking for -1. */
ignore_missing = true; /* Ignore missing pages after page 0. */
break;
default:
return -EOPNOTSUPP;
}
page_off = ee->offset % SFP_PAGE_SIZE;
page += ee->offset / SFP_PAGE_SIZE;
while (space_remaining && (page < num_pages)) {
rc = efx_mcdi_phy_get_module_eeprom_page(efx, page,
data, page_off,
space_remaining);
if (rc > 0) {
space_remaining -= rc;
data += rc;
page_off = 0;
page++;
} else if (rc == 0) {
space_remaining = 0;
} else if (ignore_missing && (page > 0)) {
int intended_size = SFP_PAGE_SIZE - page_off;
space_remaining -= intended_size;
if (space_remaining < 0) {
space_remaining = 0;
} else {
memset(data, 0, intended_size);
data += intended_size;
page_off = 0;
page++;
rc = 0;
}
} else {
return rc;
}
}
return 0;
}
static int efx_mcdi_phy_get_module_info(struct efx_nic *efx,
struct ethtool_modinfo *modinfo)
{
int sff_8472_level;
int diag_type;
switch (efx_mcdi_phy_module_type(efx)) {
case MC_CMD_MEDIA_SFP_PLUS:
sff_8472_level = efx_mcdi_phy_sff_8472_level(efx);
/* If we can't read the diagnostics level we have none. */
if (sff_8472_level < 0)
return -EOPNOTSUPP;
/* Check if this module requires the (unsupported) address
* change operation.
*/
diag_type = efx_mcdi_phy_diag_type(efx);
if ((sff_8472_level == 0) ||
(diag_type & SFF_DIAG_ADDR_CHANGE)) {
modinfo->type = ETH_MODULE_SFF_8079;
modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
} else {
modinfo->type = ETH_MODULE_SFF_8472;
modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
}
break;
case MC_CMD_MEDIA_QSFP_PLUS:
modinfo->type = ETH_MODULE_SFF_8436;
modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static const struct efx_phy_operations efx_mcdi_phy_ops = {
.probe = efx_mcdi_phy_probe,
.init = efx_port_dummy_op_int,
.reconfigure = efx_mcdi_port_reconfigure,
.poll = efx_mcdi_phy_poll,
.fini = efx_port_dummy_op_void,
.remove = efx_mcdi_phy_remove,
.get_link_ksettings = efx_mcdi_phy_get_link_ksettings,
.set_link_ksettings = efx_mcdi_phy_set_link_ksettings,
.test_alive = efx_mcdi_phy_test_alive,
.run_tests = efx_mcdi_phy_run_tests,
.test_name = efx_mcdi_phy_test_name,
.get_module_eeprom = efx_mcdi_phy_get_module_eeprom,
.get_module_info = efx_mcdi_phy_get_module_info,
};
u32 efx_mcdi_phy_get_caps(struct efx_nic *efx)
{
struct efx_mcdi_phy_data *phy_data = efx->phy_data;
return phy_data->supported_cap;
}
static unsigned int efx_mcdi_event_link_speed[] = {
[MCDI_EVENT_LINKCHANGE_SPEED_100M] = 100,
[MCDI_EVENT_LINKCHANGE_SPEED_1G] = 1000,
[MCDI_EVENT_LINKCHANGE_SPEED_10G] = 10000,
[MCDI_EVENT_LINKCHANGE_SPEED_40G] = 40000,
};
void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev)
{
u32 flags, fcntl, speed, lpa;
speed = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_SPEED);
EFX_WARN_ON_PARANOID(speed >= ARRAY_SIZE(efx_mcdi_event_link_speed));
speed = efx_mcdi_event_link_speed[speed];
flags = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LINK_FLAGS);
fcntl = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_FCNTL);
lpa = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LP_CAP);
/* efx->link_state is only modified by efx_mcdi_phy_get_link(),
* which is only run after flushing the event queues. Therefore, it
* is safe to modify the link state outside of the mac_lock here.
*/
efx_mcdi_phy_decode_link(efx, &efx->link_state, speed, flags, fcntl);
efx_mcdi_phy_check_fcntl(efx, lpa);
efx_link_status_changed(efx);
}
int efx_mcdi_set_mac(struct efx_nic *efx)
{
u32 fcntl;
MCDI_DECLARE_BUF(cmdbytes, MC_CMD_SET_MAC_IN_LEN);
BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0);
/* This has no effect on EF10 */
ether_addr_copy(MCDI_PTR(cmdbytes, SET_MAC_IN_ADDR),
efx->net_dev->dev_addr);
MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_MTU,
EFX_MAX_FRAME_LEN(efx->net_dev->mtu));
MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_DRAIN, 0);
/* Set simple MAC filter for Siena */
MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_REJECT,
SET_MAC_IN_REJECT_UNCST, efx->unicast_filter);
switch (efx->wanted_fc) {
case EFX_FC_RX | EFX_FC_TX:
fcntl = MC_CMD_FCNTL_BIDIR;
break;
case EFX_FC_RX:
fcntl = MC_CMD_FCNTL_RESPOND;
break;
default:
fcntl = MC_CMD_FCNTL_OFF;
break;
}
if (efx->wanted_fc & EFX_FC_AUTO)
fcntl = MC_CMD_FCNTL_AUTO;
if (efx->fc_disable)
fcntl = MC_CMD_FCNTL_OFF;
MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_FCNTL, fcntl);
return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, cmdbytes, sizeof(cmdbytes),
NULL, 0, NULL);
}
bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
{
MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
size_t outlength;
int rc;
BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
outbuf, sizeof(outbuf), &outlength);
if (rc)
return true;
return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;
}
enum efx_stats_action {
EFX_STATS_ENABLE,
EFX_STATS_DISABLE,
EFX_STATS_PULL,
};
static int efx_mcdi_mac_stats(struct efx_nic *efx,
enum efx_stats_action action, int clear)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
int rc;
int change = action == EFX_STATS_PULL ? 0 : 1;
int enable = action == EFX_STATS_ENABLE ? 1 : 0;
int period = action == EFX_STATS_ENABLE ? 1000 : 0;
dma_addr_t dma_addr = efx->stats_buffer.dma_addr;
u32 dma_len = action != EFX_STATS_DISABLE ?
MC_CMD_MAC_NSTATS * sizeof(u64) : 0;
BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr);
MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD,
MAC_STATS_IN_DMA, !!enable,
MAC_STATS_IN_CLEAR, clear,
MAC_STATS_IN_PERIODIC_CHANGE, change,
MAC_STATS_IN_PERIODIC_ENABLE, enable,
MAC_STATS_IN_PERIODIC_CLEAR, 0,
MAC_STATS_IN_PERIODIC_NOEVENT, 1,
MAC_STATS_IN_PERIOD_MS, period);
MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) {
struct efx_ef10_nic_data *nic_data = efx->nic_data;
MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, nic_data->vport_id);
}
rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
NULL, 0, NULL);
/* Expect ENOENT if DMA queues have not been set up */
if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues)))
efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf),
NULL, 0, rc);
return rc;
}
void efx_mcdi_mac_start_stats(struct efx_nic *efx)
{
__le64 *dma_stats = efx->stats_buffer.addr;
dma_stats[MC_CMD_MAC_GENERATION_END] = EFX_MC_STATS_GENERATION_INVALID;
efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0);
}
void efx_mcdi_mac_stop_stats(struct efx_nic *efx)
{
efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0);
}
#define EFX_MAC_STATS_WAIT_US 100
#define EFX_MAC_STATS_WAIT_ATTEMPTS 10
void efx_mcdi_mac_pull_stats(struct efx_nic *efx)
{
__le64 *dma_stats = efx->stats_buffer.addr;
int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS;
dma_stats[MC_CMD_MAC_GENERATION_END] = EFX_MC_STATS_GENERATION_INVALID;
efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0);
while (dma_stats[MC_CMD_MAC_GENERATION_END] ==
EFX_MC_STATS_GENERATION_INVALID &&
attempts-- != 0)
udelay(EFX_MAC_STATS_WAIT_US);
}
int efx_mcdi_port_probe(struct efx_nic *efx)
{
int rc;
/* Hook in PHY operations table */
efx->phy_op = &efx_mcdi_phy_ops;
/* Set up MDIO structure for PHY */
efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
efx->mdio.mdio_read = efx_mcdi_mdio_read;
efx->mdio.mdio_write = efx_mcdi_mdio_write;
/* Fill out MDIO structure, loopback modes, and initial link state */
rc = efx->phy_op->probe(efx);
if (rc != 0)
return rc;
/* Allocate buffer for stats */
rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
MC_CMD_MAC_NSTATS * sizeof(u64), GFP_KERNEL);
if (rc)
return rc;
netif_dbg(efx, probe, efx->net_dev,
"stats buffer at %llx (virt %p phys %llx)\n",
(u64)efx->stats_buffer.dma_addr,
efx->stats_buffer.addr,
(u64)virt_to_phys(efx->stats_buffer.addr));
efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 1);
return 0;
}
void efx_mcdi_port_remove(struct efx_nic *efx)
{
efx->phy_op->remove(efx);
efx_nic_free_buffer(efx, &efx->stats_buffer);
}
/* Get physical port number (EF10 only; on Siena it is same as PF number) */
int efx_mcdi_port_get_number(struct efx_nic *efx)
{
MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PORT_ASSIGNMENT_OUT_LEN);
int rc;
rc = efx_mcdi_rpc(efx, MC_CMD_GET_PORT_ASSIGNMENT, NULL, 0,
outbuf, sizeof(outbuf), NULL);
if (rc)
return rc;
return MCDI_DWORD(outbuf, GET_PORT_ASSIGNMENT_OUT_PORT);
}