/**
* phylink_start() - start a phylink instance
* @pl: a pointer to a &struct phylink returned from phylink_create()
*
* Start the phylink instance specified by @pl, configuring the MAC for the
* desired link mode(s) and negotiation style. This should be called from the
* network device driver's &struct net_device_ops ndo_open() method.
*/
void phylink_start(struct phylink *pl)
{
ASSERT_RTNL();
netdev_info(pl->netdev, "configuring for %s/%s link mode\n",
phylink_an_mode_str(pl->link_an_mode),
phy_modes(pl->link_config.interface));
/* Always set the carrier off */
netif_carrier_off(pl->netdev);
/* Apply the link configuration to the MAC when starting. This allows
* a fixed-link to start with the correct parameters, and also
* ensures that we set the appropriate advertisement for Serdes links.
*/
phylink_resolve_flow(pl, &pl->link_config);
phylink_mac_config(pl, &pl->link_config);
/* Restart autonegotiation if using 802.3z to ensure that the link
* parameters are properly negotiated. This is necessary for DSA
* switches using 802.3z negotiation to ensure they see our modes.
*/
phylink_mac_an_restart(pl);
clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
phylink_run_resolve(pl);
if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio))
mod_timer(&pl->link_poll, jiffies + HZ);
if (pl->sfp_bus)
sfp_upstream_start(pl->sfp_bus);
if (pl->phydev)
phy_start(pl->phydev);
}
static void phylink_mac_config(struct phylink *pl,
const struct phylink_link_state *state)
{
netdev_dbg(pl->netdev,
"%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
__func__, phylink_an_mode_str(pl->link_an_mode),
phy_modes(state->interface),
phy_speed_to_str(state->speed),
phy_duplex_to_str(state->duplex),
__ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
state->pause, state->link, state->an_enabled);
pl->ops->mac_config(pl->netdev, pl->link_an_mode, state);
}
void phylink_start(struct phylink *pl)
{
WARN_ON(!lockdep_rtnl_is_held());
netdev_info(pl->netdev, "configuring for %s/%s link mode\n",
phylink_an_mode_str(pl->link_an_mode),
phy_modes(pl->link_config.interface));
/* Apply the link configuration to the MAC when starting. This allows
* a fixed-link to start with the correct parameters, and also
* ensures that we set the appropriate advertisment for Serdes links.
*/
phylink_resolve_flow(pl, &pl->link_config);
phylink_mac_config(pl, &pl->link_config);
clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
phylink_run_resolve(pl);
if (pl->sfp_bus)
sfp_upstream_start(pl->sfp_bus);
if (pl->phydev)
phy_start(pl->phydev);
}
static int phylink_sfp_module_insert(void *upstream,
const struct sfp_eeprom_id *id)
{
struct phylink *pl = upstream;
__ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, };
struct phylink_link_state config;
phy_interface_t iface;
int mode, ret = 0;
bool changed;
u8 port;
sfp_parse_support(pl->sfp_bus, id, support);
port = sfp_parse_port(pl->sfp_bus, id, support);
iface = sfp_parse_interface(pl->sfp_bus, id);
WARN_ON(!lockdep_rtnl_is_held());
switch (iface) {
case PHY_INTERFACE_MODE_SGMII:
mode = MLO_AN_SGMII;
break;
case PHY_INTERFACE_MODE_1000BASEX:
mode = MLO_AN_8023Z;
break;
default:
return -EINVAL;
}
memset(&config, 0, sizeof(config));
linkmode_copy(config.advertising, support);
config.interface = iface;
config.speed = SPEED_UNKNOWN;
config.duplex = DUPLEX_UNKNOWN;
config.pause = MLO_PAUSE_AN;
config.an_enabled = pl->link_config.an_enabled;
/* Ignore errors if we're expecting a PHY to attach later */
ret = phylink_validate(pl, support, &config);
if (ret) {
netdev_err(pl->netdev, "validation of %s/%s with support %*pb failed: %d\n",
phylink_an_mode_str(mode), phy_modes(config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
return ret;
}
netdev_dbg(pl->netdev, "requesting link mode %s/%s with support %*pb\n",
phylink_an_mode_str(mode), phy_modes(config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, support);
if (mode == MLO_AN_8023Z && pl->phydev)
return -EINVAL;
changed = !bitmap_equal(pl->supported, support,
__ETHTOOL_LINK_MODE_MASK_NBITS);
if (changed) {
linkmode_copy(pl->supported, support);
linkmode_copy(pl->link_config.advertising, config.advertising);
}
if (pl->link_an_mode != mode ||
pl->link_config.interface != config.interface) {
pl->link_config.interface = config.interface;
pl->link_an_mode = mode;
changed = true;
netdev_info(pl->netdev, "switched to %s/%s link mode\n",
phylink_an_mode_str(mode),
phy_modes(config.interface));
}
pl->link_port = port;
if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
&pl->phylink_disable_state))
phylink_mac_config(pl, &pl->link_config);
return ret;
}
static int phylink_sfp_module_insert(void *upstream,
const struct sfp_eeprom_id *id)
{
struct phylink *pl = upstream;
__ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, };
struct phylink_link_state config;
phy_interface_t iface;
int ret = 0;
bool changed;
u8 port;
ASSERT_RTNL();
sfp_parse_support(pl->sfp_bus, id, support);
port = sfp_parse_port(pl->sfp_bus, id, support);
memset(&config, 0, sizeof(config));
linkmode_copy(config.advertising, support);
config.interface = PHY_INTERFACE_MODE_NA;
config.speed = SPEED_UNKNOWN;
config.duplex = DUPLEX_UNKNOWN;
config.pause = MLO_PAUSE_AN;
config.an_enabled = pl->link_config.an_enabled;
/* Ignore errors if we're expecting a PHY to attach later */
ret = phylink_validate(pl, support, &config);
if (ret) {
netdev_err(pl->netdev, "validation with support %*pb failed: %d\n",
__ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
return ret;
}
iface = sfp_select_interface(pl->sfp_bus, id, config.advertising);
if (iface == PHY_INTERFACE_MODE_NA) {
netdev_err(pl->netdev,
"selection of interface failed, advertisement %*pb\n",
__ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising);
return -EINVAL;
}
config.interface = iface;
ret = phylink_validate(pl, support, &config);
if (ret) {
netdev_err(pl->netdev, "validation of %s/%s with support %*pb failed: %d\n",
phylink_an_mode_str(MLO_AN_INBAND),
phy_modes(config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
return ret;
}
netdev_dbg(pl->netdev, "requesting link mode %s/%s with support %*pb\n",
phylink_an_mode_str(MLO_AN_INBAND),
phy_modes(config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, support);
if (phy_interface_mode_is_8023z(iface) && pl->phydev)
return -EINVAL;
changed = !bitmap_equal(pl->supported, support,
__ETHTOOL_LINK_MODE_MASK_NBITS);
if (changed) {
linkmode_copy(pl->supported, support);
linkmode_copy(pl->link_config.advertising, config.advertising);
}
if (pl->link_an_mode != MLO_AN_INBAND ||
pl->link_config.interface != config.interface) {
pl->link_config.interface = config.interface;
pl->link_an_mode = MLO_AN_INBAND;
changed = true;
netdev_info(pl->netdev, "switched to %s/%s link mode\n",
phylink_an_mode_str(MLO_AN_INBAND),
phy_modes(config.interface));
}
pl->link_port = port;
if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
&pl->phylink_disable_state))
phylink_mac_config(pl, &pl->link_config);
return ret;
}
