diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/792-03-v6.6-net-phylink-add-pcs_enable-pcs_disable-methods.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/792-03-v6.6-net-phylink-add-pcs_enable-pcs_disable-methods.patch | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/792-03-v6.6-net-phylink-add-pcs_enable-pcs_disable-methods.patch b/target/linux/generic/backport-5.15/792-03-v6.6-net-phylink-add-pcs_enable-pcs_disable-methods.patch new file mode 100644 index 0000000000..ceec58466e --- /dev/null +++ b/target/linux/generic/backport-5.15/792-03-v6.6-net-phylink-add-pcs_enable-pcs_disable-methods.patch @@ -0,0 +1,172 @@ +From 90ef0a7b0622c62758b2638604927867775479ea Mon Sep 17 00:00:00 2001 +From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk> +Date: Thu, 13 Jul 2023 09:42:07 +0100 +Subject: [PATCH] net: phylink: add pcs_enable()/pcs_disable() methods + +Add phylink PCS enable/disable callbacks that will allow us to place +IEEE 802.3 register compliant PCS in power-down mode while not being +used. + +Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/phy/phylink.c | 48 +++++++++++++++++++++++++++++++-------- + include/linux/phylink.h | 16 +++++++++++++ + 2 files changed, 55 insertions(+), 9 deletions(-) + +--- a/drivers/net/phy/phylink.c ++++ b/drivers/net/phy/phylink.c +@@ -34,6 +34,10 @@ enum { + PHYLINK_DISABLE_STOPPED, + PHYLINK_DISABLE_LINK, + PHYLINK_DISABLE_MAC_WOL, ++ ++ PCS_STATE_DOWN = 0, ++ PCS_STATE_STARTING, ++ PCS_STATE_STARTED, + }; + + /** +@@ -72,6 +76,7 @@ struct phylink { + struct mutex state_mutex; + struct phylink_link_state phy_state; + struct work_struct resolve; ++ unsigned int pcs_state; + + bool mac_link_dropped; + bool using_mac_select_pcs; +@@ -795,6 +800,22 @@ static void phylink_mac_pcs_an_restart(s + } + } + ++static void phylink_pcs_disable(struct phylink_pcs *pcs) ++{ ++ if (pcs && pcs->ops->pcs_disable) ++ pcs->ops->pcs_disable(pcs); ++} ++ ++static int phylink_pcs_enable(struct phylink_pcs *pcs) ++{ ++ int err = 0; ++ ++ if (pcs && pcs->ops->pcs_enable) ++ err = pcs->ops->pcs_enable(pcs); ++ ++ return err; ++} ++ + static void phylink_major_config(struct phylink *pl, bool restart, + const struct phylink_link_state *state) + { +@@ -832,12 +853,16 @@ static void phylink_major_config(struct + * for the change. + */ + if (pcs_changed) { ++ phylink_pcs_disable(pl->pcs); + pl->pcs = pcs; + pl->pcs_ops = pcs->ops; + } + + phylink_mac_config(pl, state); + ++ if (pl->pcs_state == PCS_STATE_STARTING || pcs_changed) ++ phylink_pcs_enable(pl->pcs); ++ + if (pl->pcs_ops) { + err = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, + state->interface, +@@ -1260,6 +1285,7 @@ struct phylink *phylink_create(struct ph + pl->link_config.speed = SPEED_UNKNOWN; + pl->link_config.duplex = DUPLEX_UNKNOWN; + pl->link_config.an_enabled = true; ++ pl->pcs_state = PCS_STATE_DOWN; + pl->mac_ops = mac_ops; + __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); + timer_setup(&pl->link_poll, phylink_fixed_poll, 0); +@@ -1651,6 +1677,8 @@ void phylink_start(struct phylink *pl) + if (pl->netdev) + netif_carrier_off(pl->netdev); + ++ pl->pcs_state = PCS_STATE_STARTING; ++ + /* 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. +@@ -1661,6 +1689,8 @@ void phylink_start(struct phylink *pl) + */ + phylink_mac_initial_config(pl, true); + ++ pl->pcs_state = PCS_STATE_STARTED; ++ + clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); + phylink_run_resolve(pl); + +@@ -1680,16 +1710,9 @@ void phylink_start(struct phylink *pl) + poll = true; + } + +- switch (pl->cfg_link_an_mode) { +- case MLO_AN_FIXED: ++ if (pl->cfg_link_an_mode == MLO_AN_FIXED) + poll |= pl->config->poll_fixed_state; +- break; +- case MLO_AN_INBAND: +- poll |= pl->config->pcs_poll; +- if (pl->pcs) +- poll |= pl->pcs->poll; +- break; +- } ++ + if (poll) + mod_timer(&pl->link_poll, jiffies + HZ); + if (pl->phydev) +@@ -1726,6 +1749,10 @@ void phylink_stop(struct phylink *pl) + } + + phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); ++ ++ pl->pcs_state = PCS_STATE_DOWN; ++ ++ phylink_pcs_disable(pl->pcs); + } + EXPORT_SYMBOL_GPL(phylink_stop); + +--- a/include/linux/phylink.h ++++ b/include/linux/phylink.h +@@ -419,6 +419,8 @@ struct phylink_pcs { + /** + * struct phylink_pcs_ops - MAC PCS operations structure. + * @pcs_validate: validate the link configuration. ++ * @pcs_enable: enable the PCS. ++ * @pcs_disable: disable the PCS. + * @pcs_get_state: read the current MAC PCS link state from the hardware. + * @pcs_config: configure the MAC PCS for the selected mode and state. + * @pcs_an_restart: restart 802.3z BaseX autonegotiation. +@@ -428,6 +430,8 @@ struct phylink_pcs { + struct phylink_pcs_ops { + int (*pcs_validate)(struct phylink_pcs *pcs, unsigned long *supported, + const struct phylink_link_state *state); ++ int (*pcs_enable)(struct phylink_pcs *pcs); ++ void (*pcs_disable)(struct phylink_pcs *pcs); + void (*pcs_get_state)(struct phylink_pcs *pcs, + struct phylink_link_state *state); + int (*pcs_config)(struct phylink_pcs *pcs, unsigned int mode, +@@ -458,6 +462,18 @@ int pcs_validate(struct phylink_pcs *pcs + const struct phylink_link_state *state); + + /** ++ * pcs_enable() - enable the PCS. ++ * @pcs: a pointer to a &struct phylink_pcs. ++ */ ++int pcs_enable(struct phylink_pcs *pcs); ++ ++/** ++ * pcs_disable() - disable the PCS. ++ * @pcs: a pointer to a &struct phylink_pcs. ++ */ ++void pcs_disable(struct phylink_pcs *pcs); ++ ++/** + * pcs_get_state() - Read the current inband link state from the hardware + * @pcs: a pointer to a &struct phylink_pcs. + * @state: a pointer to a &struct phylink_link_state. |