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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) Meta Platforms, Inc. and affiliates. */
#include <linux/phy.h>
#include <linux/phylink.h>
#include "fbnic.h"
#include "fbnic_mac.h"
#include "fbnic_netdev.h"
static phy_interface_t fbnic_phylink_select_interface(u8 aui)
{
switch (aui) {
case FBNIC_AUI_100GAUI2:
return PHY_INTERFACE_MODE_100GBASEP;
case FBNIC_AUI_50GAUI1:
return PHY_INTERFACE_MODE_50GBASER;
case FBNIC_AUI_LAUI2:
return PHY_INTERFACE_MODE_LAUI;
case FBNIC_AUI_25GAUI:
return PHY_INTERFACE_MODE_25GBASER;
}
return PHY_INTERFACE_MODE_NA;
}
void fbnic_phylink_get_pauseparam(struct net_device *netdev,
struct ethtool_pauseparam *pause)
{
struct fbnic_net *fbn = netdev_priv(netdev);
phylink_ethtool_get_pauseparam(fbn->phylink, pause);
}
int fbnic_phylink_set_pauseparam(struct net_device *netdev,
struct ethtool_pauseparam *pause)
{
struct fbnic_net *fbn = netdev_priv(netdev);
return phylink_ethtool_set_pauseparam(fbn->phylink, pause);
}
static void
fbnic_phylink_get_supported_fec_modes(unsigned long *supported)
{
/* The NIC can support up to 8 possible combinations.
* Either 50G-CR, or 100G-CR2
* This is with RS FEC mode only
* Either 25G-CR, or 50G-CR2
* This is with No FEC, RS, or Base-R
*/
if (phylink_test(supported, 100000baseCR2_Full) ||
phylink_test(supported, 50000baseCR_Full))
phylink_set(supported, FEC_RS);
if (phylink_test(supported, 50000baseCR2_Full) ||
phylink_test(supported, 25000baseCR_Full)) {
phylink_set(supported, FEC_BASER);
phylink_set(supported, FEC_NONE);
phylink_set(supported, FEC_RS);
}
}
int fbnic_phylink_ethtool_ksettings_get(struct net_device *netdev,
struct ethtool_link_ksettings *cmd)
{
struct fbnic_net *fbn = netdev_priv(netdev);
int err;
err = phylink_ethtool_ksettings_get(fbn->phylink, cmd);
if (!err) {
unsigned long *supp = cmd->link_modes.supported;
cmd->base.port = PORT_DA;
cmd->lanes = (fbn->aui & FBNIC_AUI_MODE_R2) ? 2 : 1;
fbnic_phylink_get_supported_fec_modes(supp);
}
return err;
}
int fbnic_phylink_get_fecparam(struct net_device *netdev,
struct ethtool_fecparam *fecparam)
{
struct fbnic_net *fbn = netdev_priv(netdev);
if (fbn->fec & FBNIC_FEC_RS) {
fecparam->active_fec = ETHTOOL_FEC_RS;
fecparam->fec = ETHTOOL_FEC_RS;
} else if (fbn->fec & FBNIC_FEC_BASER) {
fecparam->active_fec = ETHTOOL_FEC_BASER;
fecparam->fec = ETHTOOL_FEC_BASER;
} else {
fecparam->active_fec = ETHTOOL_FEC_OFF;
fecparam->fec = ETHTOOL_FEC_OFF;
}
if (fbn->aui & FBNIC_AUI_MODE_PAM4)
fecparam->fec |= ETHTOOL_FEC_AUTO;
return 0;
}
static struct fbnic_net *
fbnic_pcs_to_net(struct phylink_pcs *pcs)
{
return container_of(pcs, struct fbnic_net, phylink_pcs);
}
static void
fbnic_phylink_pcs_get_state(struct phylink_pcs *pcs, unsigned int neg_mode,
struct phylink_link_state *state)
{
struct fbnic_net *fbn = fbnic_pcs_to_net(pcs);
struct fbnic_dev *fbd = fbn->fbd;
switch (fbn->aui) {
case FBNIC_AUI_25GAUI:
state->speed = SPEED_25000;
break;
case FBNIC_AUI_LAUI2:
case FBNIC_AUI_50GAUI1:
state->speed = SPEED_50000;
break;
case FBNIC_AUI_100GAUI2:
state->speed = SPEED_100000;
break;
default:
state->link = 0;
return;
}
state->duplex = DUPLEX_FULL;
state->link = fbd->mac->pcs_get_link(fbd);
}
static int
fbnic_phylink_pcs_enable(struct phylink_pcs *pcs)
{
struct fbnic_net *fbn = fbnic_pcs_to_net(pcs);
struct fbnic_dev *fbd = fbn->fbd;
return fbd->mac->pcs_enable(fbd);
}
static void
fbnic_phylink_pcs_disable(struct phylink_pcs *pcs)
{
struct fbnic_net *fbn = fbnic_pcs_to_net(pcs);
struct fbnic_dev *fbd = fbn->fbd;
return fbd->mac->pcs_disable(fbd);
}
static int
fbnic_phylink_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode,
phy_interface_t interface,
const unsigned long *advertising,
bool permit_pause_to_mac)
{
return 0;
}
static const struct phylink_pcs_ops fbnic_phylink_pcs_ops = {
.pcs_config = fbnic_phylink_pcs_config,
.pcs_enable = fbnic_phylink_pcs_enable,
.pcs_disable = fbnic_phylink_pcs_disable,
.pcs_get_state = fbnic_phylink_pcs_get_state,
};
static struct phylink_pcs *
fbnic_phylink_mac_select_pcs(struct phylink_config *config,
phy_interface_t interface)
{
struct net_device *netdev = to_net_dev(config->dev);
struct fbnic_net *fbn = netdev_priv(netdev);
return &fbn->phylink_pcs;
}
static void
fbnic_phylink_mac_config(struct phylink_config *config, unsigned int mode,
const struct phylink_link_state *state)
{
}
static void
fbnic_phylink_mac_link_down(struct phylink_config *config, unsigned int mode,
phy_interface_t interface)
{
struct net_device *netdev = to_net_dev(config->dev);
struct fbnic_net *fbn = netdev_priv(netdev);
struct fbnic_dev *fbd = fbn->fbd;
fbd->mac->link_down(fbd);
fbn->link_down_events++;
}
static void
fbnic_phylink_mac_link_up(struct phylink_config *config,
struct phy_device *phy, unsigned int mode,
phy_interface_t interface, int speed, int duplex,
bool tx_pause, bool rx_pause)
{
struct net_device *netdev = to_net_dev(config->dev);
struct fbnic_net *fbn = netdev_priv(netdev);
struct fbnic_dev *fbd = fbn->fbd;
fbd->mac->link_up(fbd, tx_pause, rx_pause);
}
static const struct phylink_mac_ops fbnic_phylink_mac_ops = {
.mac_select_pcs = fbnic_phylink_mac_select_pcs,
.mac_config = fbnic_phylink_mac_config,
.mac_link_down = fbnic_phylink_mac_link_down,
.mac_link_up = fbnic_phylink_mac_link_up,
};
int fbnic_phylink_init(struct net_device *netdev)
{
struct fbnic_net *fbn = netdev_priv(netdev);
struct fbnic_dev *fbd = fbn->fbd;
struct phylink *phylink;
fbn->phylink_pcs.ops = &fbnic_phylink_pcs_ops;
fbn->phylink_config.dev = &netdev->dev;
fbn->phylink_config.type = PHYLINK_NETDEV;
fbn->phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_ASYM_PAUSE |
MAC_25000FD | MAC_50000FD |
MAC_100000FD;
fbn->phylink_config.default_an_inband = true;
__set_bit(PHY_INTERFACE_MODE_100GBASEP,
fbn->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_50GBASER,
fbn->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_LAUI,
fbn->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_25GBASER,
fbn->phylink_config.supported_interfaces);
fbnic_mac_get_fw_settings(fbd, &fbn->aui, &fbn->fec);
phylink = phylink_create(&fbn->phylink_config, NULL,
fbnic_phylink_select_interface(fbn->aui),
&fbnic_phylink_mac_ops);
if (IS_ERR(phylink))
return PTR_ERR(phylink);
fbn->phylink = phylink;
return 0;
}
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