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net: phylink: simplify phy case for ksettings_set method

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When we have a PHY attached, an ethtool ksettings_set() call only
really needs to call through to the phylib equivalent; phylib will
call back to us when the link changes so we can update our state.
Therefore, we can bypass most of our ksettings_set() call for this
case.

Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King 2020-07-21 12:04:21 +01:00 committed by David S. Miller
parent c8cab719cc
commit cbc1bb1e46
1 changed files with 49 additions and 59 deletions
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108
drivers/net/phy/phylink.c
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@ -1312,13 +1312,33 @@ int phylink_ethtool_ksettings_set(struct phylink *pl,
const struct ethtool_link_ksettings *kset)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(support);
struct ethtool_link_ksettings our_kset;
struct phylink_link_state config;
const struct phy_setting *s;
int ret;
ASSERT_RTNL();
if (pl->phydev) {
/* We can rely on phylib for this update; we also do not need
* to update the pl->link_config settings:
* - the configuration returned via ksettings_get() will come
* from phylib whenever a PHY is present.
* - link_config.interface will be updated by the PHY calling
* back via phylink_phy_change() and a subsequent resolve.
* - initial link configuration for PHY mode comes from the
* last phy state updated via phylink_phy_change().
* - other configuration changes (e.g. pause modes) are
* performed directly via phylib.
* - if in in-band mode with a PHY, the link configuration
* is passed on the link from the PHY, and all of
* link_config.{speed,duplex,an_enabled,pause} are not used.
* - the only possible use would be link_config.advertising
* pause modes when in 1000base-X mode with a PHY, but in
* the presence of a PHY, this should not be changed as that
* should be determined from the media side advertisement.
*/
return phy_ethtool_ksettings_set(pl->phydev, kset);
}
linkmode_copy(support, pl->supported);
config = pl->link_config;
config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE;
@ -1365,65 +1385,35 @@ int phylink_ethtool_ksettings_set(struct phylink *pl,
return -EINVAL;
}
if (pl->phydev) {
/* If we have a PHY, we process the kset change via phylib.
* phylib will call our link state function if the PHY
* parameters have changed, which will trigger a resolve
* and update the MAC configuration.
/* For a fixed link, this isn't able to change any parameters,
* which just leaves inband mode.
*/
if (phylink_validate(pl, support, &config))
return -EINVAL;
/* If autonegotiation is enabled, we must have an advertisement */
if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
return -EINVAL;
mutex_lock(&pl->state_mutex);
linkmode_copy(pl->link_config.advertising, config.advertising);
pl->link_config.interface = config.interface;
pl->link_config.speed = config.speed;
pl->link_config.duplex = config.duplex;
pl->link_config.an_enabled = kset->base.autoneg !=
AUTONEG_DISABLE;
if (pl->cur_link_an_mode == MLO_AN_INBAND &&
!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
/* If in 802.3z mode, this updates the advertisement.
*
* If we are in SGMII mode without a PHY, there is no
* advertisement; the only thing we have is the pause
* modes which can only come from a PHY.
*/
our_kset = *kset;
linkmode_copy(our_kset.link_modes.advertising,
config.advertising);
our_kset.base.speed = config.speed;
our_kset.base.duplex = config.duplex;
ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset);
if (ret)
return ret;
mutex_lock(&pl->state_mutex);
/* Save the new configuration */
linkmode_copy(pl->link_config.advertising,
our_kset.link_modes.advertising);
pl->link_config.interface = config.interface;
pl->link_config.speed = our_kset.base.speed;
pl->link_config.duplex = our_kset.base.duplex;
pl->link_config.an_enabled = our_kset.base.autoneg !=
AUTONEG_DISABLE;
mutex_unlock(&pl->state_mutex);
} else {
/* For a fixed link, this isn't able to change any parameters,
* which just leaves inband mode.
*/
if (phylink_validate(pl, support, &config))
return -EINVAL;
/* If autonegotiation is enabled, we must have an advertisement */
if (config.an_enabled &&
phylink_is_empty_linkmode(config.advertising))
return -EINVAL;
mutex_lock(&pl->state_mutex);
linkmode_copy(pl->link_config.advertising, config.advertising);
pl->link_config.interface = config.interface;
pl->link_config.speed = config.speed;
pl->link_config.duplex = config.duplex;
pl->link_config.an_enabled = kset->base.autoneg !=
AUTONEG_DISABLE;
if (pl->cur_link_an_mode == MLO_AN_INBAND &&
!test_bit(PHYLINK_DISABLE_STOPPED,
&pl->phylink_disable_state)) {
/* If in 802.3z mode, this updates the advertisement.
*
* If we are in SGMII mode without a PHY, there is no
* advertisement; the only thing we have is the pause
* modes which can only come from a PHY.
*/
phylink_pcs_config(pl, true, &pl->link_config);
}
mutex_unlock(&pl->state_mutex);
phylink_pcs_config(pl, true, &pl->link_config);
}
mutex_unlock(&pl->state_mutex);
return 0;
}