From 4b3fc475c61fa8733a9acc9d743f6cc9ca4915f5 Mon Sep 17 00:00:00 2001 From: Russell King Date: Fri, 6 Sep 2024 16:05:07 +0530 Subject: [PATCH] net: phylink: Add phylink_set_fixed_link() to configure fixed link state in phylink The function allows for the configuration of a fixed link state for a given phylink instance. This addition is particularly useful for network devices that operate with a fixed link configuration, where the link parameters do not change dynamically. By using `phylink_set_fixed_link()`, drivers can easily set up the fixed link state during initialization or configuration changes. Reviewed-by: Andrew Lunn Signed-off-by: Russell King Signed-off-by: Raju Lakkaraju Signed-off-by: David S. Miller --- drivers/net/phy/phylink.c | 42 +++++++++++++++++++++++++++++++++++++++ include/linux/phylink.h | 2 ++ 2 files changed, 44 insertions(+) diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index ab4e9fc03017..4309317de3d1 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -1635,6 +1635,48 @@ static int phylink_register_sfp(struct phylink *pl, return ret; } +/** + * phylink_set_fixed_link() - set the fixed link + * @pl: a pointer to a &struct phylink returned from phylink_create() + * @state: a pointer to a struct phylink_link_state. + * + * This function is used when the link parameters are known and do not change, + * making it suitable for certain types of network connections. + * + * Returns: zero on success or negative error code. + */ +int phylink_set_fixed_link(struct phylink *pl, + const struct phylink_link_state *state) +{ + const struct phy_setting *s; + unsigned long *adv; + + if (pl->cfg_link_an_mode != MLO_AN_PHY || !state || + !test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) + return -EINVAL; + + s = phy_lookup_setting(state->speed, state->duplex, + pl->supported, true); + if (!s) + return -EINVAL; + + adv = pl->link_config.advertising; + linkmode_zero(adv); + linkmode_set_bit(s->bit, adv); + linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv); + + pl->link_config.speed = state->speed; + pl->link_config.duplex = state->duplex; + pl->link_config.link = 1; + pl->link_config.an_complete = 1; + + pl->cfg_link_an_mode = MLO_AN_FIXED; + pl->cur_link_an_mode = pl->cfg_link_an_mode; + + return 0; +} +EXPORT_SYMBOL_GPL(phylink_set_fixed_link); + /** * phylink_create() - create a phylink instance * @config: a pointer to the target &struct phylink_config diff --git a/include/linux/phylink.h b/include/linux/phylink.h index 2381e07429a2..5c01048860c4 100644 --- a/include/linux/phylink.h +++ b/include/linux/phylink.h @@ -598,6 +598,8 @@ int phylink_fwnode_phy_connect(struct phylink *pl, const struct fwnode_handle *fwnode, u32 flags); void phylink_disconnect_phy(struct phylink *); +int phylink_set_fixed_link(struct phylink *, + const struct phylink_link_state *); void phylink_mac_change(struct phylink *, bool up); void phylink_pcs_change(struct phylink_pcs *, bool up); -- 2.20.1