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-rw-r--r--drivers/net/phy/phylink.c80
-rw-r--r--include/linux/phylink.h48
2 files changed, 102 insertions, 26 deletions
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index b755a5325b8b..61b5225a1219 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -433,23 +433,47 @@ static void phylink_mac_pcs_an_restart(struct phylink *pl)
}
}
-static void phylink_pcs_config(struct phylink *pl, bool force_restart,
- const struct phylink_link_state *state)
+static void phylink_change_interface(struct phylink *pl, bool restart,
+ const struct phylink_link_state *state)
{
- bool restart = force_restart;
+ int err;
+
+ phylink_dbg(pl, "change interface %s\n", phy_modes(state->interface));
- if (pl->pcs_ops && pl->pcs_ops->pcs_config(pl->config,
- pl->cur_link_an_mode,
- state->interface,
- state->advertising,
- !!(pl->link_config.pause &
- MLO_PAUSE_AN)))
- restart = true;
+ if (pl->mac_ops->mac_prepare) {
+ err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode,
+ state->interface);
+ if (err < 0) {
+ phylink_err(pl, "mac_prepare failed: %pe\n",
+ ERR_PTR(err));
+ return;
+ }
+ }
phylink_mac_config(pl, state);
+ if (pl->pcs_ops) {
+ err = pl->pcs_ops->pcs_config(pl->config, pl->cur_link_an_mode,
+ state->interface,
+ state->advertising,
+ !!(pl->link_config.pause &
+ MLO_PAUSE_AN));
+ if (err < 0)
+ phylink_err(pl, "pcs_config failed: %pe\n",
+ ERR_PTR(err));
+ if (err > 0)
+ restart = true;
+ }
if (restart)
phylink_mac_pcs_an_restart(pl);
+
+ if (pl->mac_ops->mac_finish) {
+ err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode,
+ state->interface);
+ if (err < 0)
+ phylink_err(pl, "mac_prepare failed: %pe\n",
+ ERR_PTR(err));
+ }
}
/*
@@ -555,7 +579,7 @@ static void phylink_mac_initial_config(struct phylink *pl, bool force_restart)
link_state.link = false;
phylink_apply_manual_flow(pl, &link_state);
- phylink_pcs_config(pl, force_restart, &link_state);
+ phylink_change_interface(pl, force_restart, &link_state);
}
static const char *phylink_pause_to_str(int pause)
@@ -674,7 +698,7 @@ static void phylink_resolve(struct work_struct *w)
phylink_link_down(pl);
cur_link_state = false;
}
- phylink_pcs_config(pl, false, &link_state);
+ phylink_change_interface(pl, false, &link_state);
pl->link_config.interface = link_state.interface;
} else if (!pl->pcs_ops) {
/* The interface remains unchanged, only the speed,
@@ -1451,22 +1475,26 @@ int phylink_ethtool_ksettings_set(struct phylink *pl,
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);
+ pl->link_config.an_enabled = kset->base.autoneg != AUTONEG_DISABLE;
+
+ if (pl->link_config.interface != config.interface) {
+ /* The interface changed, e.g. 1000base-X <-> 2500base-X */
+ /* We need to force the link down, then change the interface */
+ if (pl->old_link_state) {
+ phylink_link_down(pl);
+ pl->old_link_state = false;
+ }
+ if (!test_bit(PHYLINK_DISABLE_STOPPED,
+ &pl->phylink_disable_state))
+ phylink_change_interface(pl, false, &config);
+ pl->link_config.interface = config.interface;
+ linkmode_copy(pl->link_config.advertising, config.advertising);
+ } else if (!linkmode_equal(pl->link_config.advertising,
+ config.advertising)) {
+ linkmode_copy(pl->link_config.advertising, config.advertising);
+ phylink_change_inband_advert(pl);
}
mutex_unlock(&pl->state_mutex);
diff --git a/include/linux/phylink.h b/include/linux/phylink.h
index d9913d8e6b91..2f1315f32113 100644
--- a/include/linux/phylink.h
+++ b/include/linux/phylink.h
@@ -76,7 +76,9 @@ struct phylink_config {
* struct phylink_mac_ops - MAC operations structure.
* @validate: Validate and update the link configuration.
* @mac_pcs_get_state: Read the current link state from the hardware.
+ * @mac_prepare: prepare for a major reconfiguration of the interface.
* @mac_config: configure the MAC for the selected mode and state.
+ * @mac_finish: finish a major reconfiguration of the interface.
* @mac_an_restart: restart 802.3z BaseX autonegotiation.
* @mac_link_down: take the link down.
* @mac_link_up: allow the link to come up.
@@ -89,8 +91,12 @@ struct phylink_mac_ops {
struct phylink_link_state *state);
void (*mac_pcs_get_state)(struct phylink_config *config,
struct phylink_link_state *state);
+ int (*mac_prepare)(struct phylink_config *config, unsigned int mode,
+ phy_interface_t iface);
void (*mac_config)(struct phylink_config *config, unsigned int mode,
const struct phylink_link_state *state);
+ int (*mac_finish)(struct phylink_config *config, unsigned int mode,
+ phy_interface_t iface);
void (*mac_an_restart)(struct phylink_config *config);
void (*mac_link_down)(struct phylink_config *config, unsigned int mode,
phy_interface_t interface);
@@ -146,6 +152,31 @@ void mac_pcs_get_state(struct phylink_config *config,
struct phylink_link_state *state);
/**
+ * mac_prepare() - prepare to change the PHY interface mode
+ * @config: a pointer to a &struct phylink_config.
+ * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
+ * @iface: interface mode to switch to
+ *
+ * phylink will call this method at the beginning of a full initialisation
+ * of the link, which includes changing the interface mode or at initial
+ * startup time. It may be called for the current mode. The MAC driver
+ * should perform whatever actions are required, e.g. disabling the
+ * Serdes PHY.
+ *
+ * This will be the first call in the sequence:
+ * - mac_prepare()
+ * - mac_config()
+ * - pcs_config()
+ * - possible pcs_an_restart()
+ * - mac_finish()
+ *
+ * Returns zero on success, or negative errno on failure which will be
+ * reported to the kernel log.
+ */
+int mac_prepare(struct phylink_config *config, unsigned int mode,
+ phy_interface_t iface);
+
+/**
* mac_config() - configure the MAC for the selected mode and state
* @config: a pointer to a &struct phylink_config.
* @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
@@ -221,6 +252,23 @@ void mac_config(struct phylink_config *config, unsigned int mode,
const struct phylink_link_state *state);
/**
+ * mac_finish() - finish a to change the PHY interface mode
+ * @config: a pointer to a &struct phylink_config.
+ * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
+ * @iface: interface mode to switch to
+ *
+ * phylink will call this if it called mac_prepare() to allow the MAC to
+ * complete any necessary steps after the MAC and PCS have been configured
+ * for the @mode and @iface. E.g. a MAC driver may wish to re-enable the
+ * Serdes PHY here if it was previously disabled by mac_prepare().
+ *
+ * Returns zero on success, or negative errno on failure which will be
+ * reported to the kernel log.
+ */
+int mac_finish(struct phylink_config *config, unsigned int mode,
+ phy_interface_t iface);
+
+/**
* mac_an_restart() - restart 802.3z BaseX autonegotiation
* @config: a pointer to a &struct phylink_config.
*/
generated by cgit (git 2.34.1) at 2024-05-02 12:44:55 +0000