/* * phylink models the MAC to optional PHY connection, supporting * technologies such as SFP cages where the PHY is hot-pluggable. * * Copyright (C) 2015 Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "swphy.h" #define SUPPORTED_INTERFACES \ (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \ SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane) #define ADVERTISED_INTERFACES \ (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \ ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane) static LIST_HEAD(phylinks); static DEFINE_MUTEX(phylink_mutex); enum { PHYLINK_DISABLE_STOPPED, PHYLINK_DISABLE_LINK, }; struct phylink { struct list_head node; struct net_device *netdev; const struct phylink_mac_ops *ops; struct mutex config_mutex; unsigned long phylink_disable_state; /* bitmask of disables */ struct phy_device *phydev; phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ u8 link_an_mode; /* MLO_AN_xxx */ u8 link_port; /* The current non-phy ethtool port */ /* ethtool supported mask for ports */ __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); /* The link configuration settings */ struct phylink_link_state link_config; struct gpio_desc *link_gpio; struct mutex state_mutex; /* may be taken within config_mutex */ struct phylink_link_state phy_state; struct work_struct resolve; const struct phylink_module_ops *module_ops; void *module_data; }; static inline void linkmode_zero(unsigned long *dst) { bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS); } static inline void linkmode_copy(unsigned long *dst, const unsigned long *src) { bitmap_copy(dst, src, __ETHTOOL_LINK_MODE_MASK_NBITS); } static inline void linkmode_and(unsigned long *dst, const unsigned long *a, const unsigned long *b) { bitmap_and(dst, a, b, __ETHTOOL_LINK_MODE_MASK_NBITS); } static inline void linkmode_or(unsigned long *dst, const unsigned long *a, const unsigned long *b) { bitmap_or(dst, a, b, __ETHTOOL_LINK_MODE_MASK_NBITS); } static inline bool linkmode_empty(const unsigned long *src) { return bitmap_empty(src, __ETHTOOL_LINK_MODE_MASK_NBITS); } static void phylink_set_port_bits(unsigned long *bits) { __set_bit(ETHTOOL_LINK_MODE_TP_BIT, bits); __set_bit(ETHTOOL_LINK_MODE_AUI_BIT, bits); __set_bit(ETHTOOL_LINK_MODE_MII_BIT, bits); __set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, bits); __set_bit(ETHTOOL_LINK_MODE_BNC_BIT, bits); __set_bit(ETHTOOL_LINK_MODE_Backplane_BIT, bits); } static const char *phylink_an_mode_str(unsigned int mode) { static const char *modestr[] = { [MLO_AN_PHY] = "phy", [MLO_AN_FIXED] = "fixed", [MLO_AN_SGMII] = "SGMII", [MLO_AN_8023Z] = "802.3z", }; return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; } static int phylink_parse_fixedlink(struct phylink *pl, struct device_node *np) { __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; struct device_node *fixed_node; const struct phy_setting *s; struct gpio_desc *desc; const __be32 *fixed_prop; u32 speed; int ret, len; fixed_node = of_get_child_by_name(np, "fixed-link"); if (fixed_node) { ret = of_property_read_u32(fixed_node, "speed", &speed); pl->link_config.speed = speed; pl->link_config.duplex = DUPLEX_HALF; if (of_property_read_bool(fixed_node, "full-duplex")) pl->link_config.duplex = DUPLEX_FULL; /* We treat the "pause" and "asym-pause" terminology as * defining the link partner's ability. */ if (of_property_read_bool(fixed_node, "pause")) pl->link_config.pause |= MLO_PAUSE_SYM; if (of_property_read_bool(fixed_node, "asym-pause")) pl->link_config.pause |= MLO_PAUSE_ASYM; if (ret == 0) { desc = fwnode_get_named_gpiod(&fixed_node->fwnode, "link-gpios"); if (!IS_ERR(desc)) pl->link_gpio = desc; else if (desc == ERR_PTR(-EPROBE_DEFER)) ret = -EPROBE_DEFER; } of_node_put(fixed_node); if (ret) return ret; } else { fixed_prop = of_get_property(np, "fixed-link", &len); if (!fixed_prop) { netdev_err(pl->netdev, "broken fixed-link?\n"); return -EINVAL; } if (len == 5 * sizeof(*fixed_prop)) { pl->link_config.duplex = be32_to_cpu(fixed_prop[1]) ? DUPLEX_FULL : DUPLEX_HALF; pl->link_config.speed = be32_to_cpu(fixed_prop[2]); if (be32_to_cpu(fixed_prop[3])) pl->link_config.pause |= MLO_PAUSE_SYM; if (be32_to_cpu(fixed_prop[4])) pl->link_config.pause |= MLO_PAUSE_ASYM; } } bitmap_fill(mask, __ETHTOOL_LINK_MODE_MASK_NBITS); pl->ops->validate_support(pl->netdev, MLO_AN_FIXED, mask); pl->link_config.link = 1; pl->link_config.an_complete = 1; if (pl->link_config.speed > SPEED_1000 && pl->link_config.duplex != DUPLEX_FULL) netdev_warn(pl->netdev, "fixed link specifies half duplex for %dMbps link?\n", pl->link_config.speed); s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, mask, __ETHTOOL_LINK_MODE_MASK_NBITS, true); if (s) { __set_bit(s->bit, pl->supported); } else { netdev_warn(pl->netdev, "fixed link %s duplex %dMbps not recognised\n", pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", pl->link_config.speed); } return 0; } static int phylink_parse_mode(struct phylink *pl, struct device_node *np) { struct device_node *dn; const char *managed; dn = of_get_child_by_name(np, "fixed-link"); if (dn || of_find_property(np, "fixed-link", NULL)) pl->link_an_mode = MLO_AN_FIXED; of_node_put(dn); if (of_property_read_string(np, "managed", &managed) == 0 && strcmp(managed, "in-band-status") == 0) { if (pl->link_an_mode == MLO_AN_FIXED) { netdev_err(pl->netdev, "can't use both fixed-link and in-band-status\n"); return -EINVAL; } phylink_set(pl->supported, 10baseT_Half); phylink_set(pl->supported, 10baseT_Full); phylink_set(pl->supported, 100baseT_Half); phylink_set(pl->supported, 100baseT_Full); phylink_set(pl->supported, 1000baseT_Half); phylink_set(pl->supported, 1000baseT_Full); phylink_set(pl->supported, Asym_Pause); phylink_set(pl->supported, Pause); pl->link_an_mode = MLO_AN_SGMII; pl->link_config.an_enabled = true; pl->ops->validate_support(pl->netdev, pl->link_an_mode, pl->supported); } return 0; } static void phylink_init_advert(struct phylink *pl, unsigned int mode, const unsigned long *supported, unsigned long *advertising) { linkmode_copy(advertising, supported); if (pl->ops->validate_advert) pl->ops->validate_advert(pl->netdev, mode, supported, advertising); } 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); } static void phylink_mac_an_restart(struct phylink *pl) { if (pl->link_config.an_enabled) pl->ops->mac_an_restart(pl->netdev, pl->link_an_mode); } static int phylink_get_mac_state(struct phylink *pl, struct phylink_link_state *state) { struct net_device *ndev = pl->netdev; linkmode_copy(state->advertising, pl->link_config.advertising); linkmode_zero(state->lp_advertising); state->interface = pl->link_config.interface; state->an_enabled = pl->link_config.an_enabled; state->link = 1; return pl->ops->mac_link_state(ndev, state); } /* The fixed state is... fixed except for the link state, * which may be determined by a GPIO. */ static void phylink_get_fixed_state(struct phylink *pl, struct phylink_link_state *state) { *state = pl->link_config; if (pl->link_gpio) state->link = !!gpiod_get_value(pl->link_gpio); } /* Flow control is resolved according to our and the link partners * advertisments using the following drawn from the 802.3 specs: * Local device Link partner * Pause AsymDir Pause AsymDir Result * 1 X 1 X TX+RX * 0 1 1 1 RX * 1 1 0 1 TX */ static void phylink_resolve_flow(struct phylink *pl, struct phylink_link_state *state) { int new_pause = 0; if (pl->link_config.pause & MLO_PAUSE_AN) { int pause = 0; if (phylink_test(pl->link_config.advertising, Pause)) pause |= MLO_PAUSE_SYM; if (phylink_test(pl->link_config.advertising, Asym_Pause)) pause |= MLO_PAUSE_ASYM; pause &= state->pause; if (pause & MLO_PAUSE_SYM) new_pause = MLO_PAUSE_TX | MLO_PAUSE_RX; else if (pause & MLO_PAUSE_ASYM) new_pause = state->pause & MLO_PAUSE_SYM ? MLO_PAUSE_RX : MLO_PAUSE_TX; } else { new_pause = pl->link_config.pause & MLO_PAUSE_TXRX_MASK; } state->pause &= ~MLO_PAUSE_TXRX_MASK; state->pause |= new_pause; } static const char *phylink_pause_to_str(int pause) { switch (pause & MLO_PAUSE_TXRX_MASK) { case MLO_PAUSE_TX | MLO_PAUSE_RX: return "rx/tx"; case MLO_PAUSE_TX: return "tx"; case MLO_PAUSE_RX: return "rx"; default: return "off"; } } static void phylink_resolve(struct work_struct *w) { struct phylink *pl = container_of(w, struct phylink, resolve); struct phylink_link_state link_state; struct net_device *ndev = pl->netdev; mutex_lock(&pl->state_mutex); if (pl->phylink_disable_state) { link_state.link = false; } else { switch (pl->link_an_mode) { case MLO_AN_PHY: link_state = pl->phy_state; phylink_resolve_flow(pl, &link_state); phylink_mac_config(pl, &link_state); break; case MLO_AN_FIXED: phylink_get_fixed_state(pl, &link_state); phylink_mac_config(pl, &link_state); break; case MLO_AN_SGMII: phylink_get_mac_state(pl, &link_state); if (pl->phydev) { bool changed = false; link_state.link = link_state.link && pl->phy_state.link; if (pl->phy_state.interface != link_state.interface) { link_state.interface = pl->phy_state.interface; changed = true; } /* Propagate the flow control from the PHY * to the MAC. Also propagate the interface * if changed. */ if (pl->phy_state.link || changed) { link_state.pause |= pl->phy_state.pause; phylink_resolve_flow(pl, &link_state); phylink_mac_config(pl, &link_state); } } break; case MLO_AN_8023Z: phylink_get_mac_state(pl, &link_state); break; } } if (link_state.link != netif_carrier_ok(ndev)) { if (!link_state.link) { netif_carrier_off(ndev); pl->ops->mac_link_down(ndev, pl->link_an_mode); netdev_info(ndev, "Link is Down\n"); } else { pl->ops->mac_link_up(ndev, pl->link_an_mode, pl->phydev); netif_carrier_on(ndev); netdev_info(ndev, "Link is Up - %s/%s - flow control %s\n", phy_speed_to_str(link_state.speed), phy_duplex_to_str(link_state.duplex), phylink_pause_to_str(link_state.pause)); } } mutex_unlock(&pl->state_mutex); } static void phylink_run_resolve(struct phylink *pl) { if (!pl->phylink_disable_state) queue_work(system_power_efficient_wq, &pl->resolve); } struct phylink *phylink_create(struct net_device *ndev, struct device_node *np, phy_interface_t iface, const struct phylink_mac_ops *ops) { struct phylink *pl; int ret; pl = kzalloc(sizeof(*pl), GFP_KERNEL); if (!pl) return ERR_PTR(-ENOMEM); mutex_init(&pl->state_mutex); mutex_init(&pl->config_mutex); INIT_WORK(&pl->resolve, phylink_resolve); pl->netdev = ndev; pl->phy_state.interface = iface; pl->link_interface = iface; pl->link_port = PORT_MII; pl->link_config.interface = iface; pl->link_config.pause = MLO_PAUSE_AN; pl->link_config.speed = SPEED_UNKNOWN; pl->link_config.duplex = DUPLEX_UNKNOWN; pl->ops = ops; __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); ret = phylink_parse_mode(pl, np); if (ret < 0) { kfree(pl); return ERR_PTR(ret); } if (pl->link_an_mode == MLO_AN_FIXED) { ret = phylink_parse_fixedlink(pl, np); if (ret < 0) { kfree(pl); return ERR_PTR(ret); } } phylink_set(pl->supported, MII); phylink_init_advert(pl, pl->link_an_mode, pl->supported, pl->link_config.advertising); mutex_lock(&phylink_mutex); list_add_tail(&pl->node, &phylinks); mutex_unlock(&phylink_mutex); return pl; } EXPORT_SYMBOL_GPL(phylink_create); void phylink_destroy(struct phylink *pl) { mutex_lock(&phylink_mutex); list_del(&pl->node); mutex_unlock(&phylink_mutex); cancel_work_sync(&pl->resolve); kfree(pl); } EXPORT_SYMBOL_GPL(phylink_destroy); void phylink_phy_change(struct phy_device *phydev, bool up, bool do_carrier) { struct phylink *pl = phydev->phylink; mutex_lock(&pl->state_mutex); pl->phy_state.speed = phydev->speed; pl->phy_state.duplex = phydev->duplex; pl->phy_state.pause = MLO_PAUSE_NONE; if (phydev->pause) pl->phy_state.pause |= MLO_PAUSE_SYM; if (phydev->asym_pause) pl->phy_state.pause |= MLO_PAUSE_ASYM; pl->phy_state.interface = phydev->interface; pl->phy_state.link = up; mutex_unlock(&pl->state_mutex); phylink_run_resolve(pl); netdev_dbg(pl->netdev, "phy link %s %s/%s/%s\n", up ? "up" : "down", phy_modes(phydev->interface), phy_speed_to_str(phydev->speed), phy_duplex_to_str(phydev->duplex)); } static int phylink_empty_linkmode(const unsigned long *linkmode) { __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; phylink_set_port_bits(tmp); phylink_set(tmp, Autoneg); phylink_set(tmp, Pause); phylink_set(tmp, Asym_Pause); bitmap_andnot(tmp, linkmode, tmp, __ETHTOOL_LINK_MODE_MASK_NBITS); return linkmode_empty(tmp); } static int phylink_validate_support(struct phylink *pl, int mode, unsigned long *mask) { pl->ops->validate_support(pl->netdev, mode, mask); return phylink_empty_linkmode(mask) ? -EINVAL : 0; } static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy) { __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); u32 advertising; int ret; ethtool_convert_legacy_u32_to_link_mode(mask, phy->supported); ret = phylink_validate_support(pl, pl->link_an_mode, mask); if (ret) return ret; mutex_lock(&pl->config_mutex); phy->phylink = pl; phy->phy_link_change = phylink_phy_change; netdev_info(pl->netdev, "PHY [%s] driver [%s]\n", dev_name(&phy->mdio.dev), phy->drv->name); mutex_lock(&pl->state_mutex); pl->phydev = phy; linkmode_copy(pl->supported, mask); /* Restrict the phy advertisment according to the MAC support. */ ethtool_convert_link_mode_to_legacy_u32(&advertising, mask); phy->advertising &= ADVERTISED_INTERFACES | advertising; ethtool_convert_legacy_u32_to_link_mode(pl->link_config.advertising, phy->advertising); mutex_unlock(&pl->state_mutex); netdev_dbg(pl->netdev, "phy: setting supported %*pb advertising 0x%08x\n", __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, phy->advertising); phy_start_machine(phy); if (phy->irq > 0) phy_start_interrupts(phy); mutex_unlock(&pl->config_mutex); return 0; } int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) { int ret; ret = phy_attach_direct(pl->netdev, phy, 0, pl->link_interface); if (ret) return ret; ret = phylink_bringup_phy(pl, phy); if (ret) phy_detach(phy); return ret; } EXPORT_SYMBOL_GPL(phylink_connect_phy); int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn) { struct device_node *phy_node; struct phy_device *phy_dev; int ret; /* Fixed links are handled without needing a PHY */ if (pl->link_an_mode == MLO_AN_FIXED) return 0; phy_node = of_parse_phandle(dn, "phy-handle", 0); if (!phy_node) phy_node = of_parse_phandle(dn, "phy", 0); if (!phy_node) phy_node = of_parse_phandle(dn, "phy-device", 0); if (!phy_node) { if (pl->link_an_mode == MLO_AN_PHY) { netdev_err(pl->netdev, "unable to find PHY node\n"); return -ENODEV; } return 0; } phy_dev = of_phy_attach(pl->netdev, phy_node, 0, pl->link_interface); /* We're done with the phy_node handle */ of_node_put(phy_node); if (!phy_dev) return -ENODEV; ret = phylink_bringup_phy(pl, phy_dev); if (ret) phy_detach(phy_dev); return ret; } EXPORT_SYMBOL_GPL(phylink_of_phy_connect); void phylink_disconnect_phy(struct phylink *pl) { struct phy_device *phy; mutex_lock(&pl->config_mutex); phy = pl->phydev; mutex_lock(&pl->state_mutex); pl->phydev = NULL; mutex_unlock(&pl->state_mutex); flush_work(&pl->resolve); if (phy) phy_disconnect(phy); mutex_unlock(&pl->config_mutex); } EXPORT_SYMBOL_GPL(phylink_disconnect_phy); void phylink_mac_change(struct phylink *pl, bool up) { phylink_run_resolve(pl); netdev_dbg(pl->netdev, "mac link %s\n", up ? "up" : "down"); } EXPORT_SYMBOL_GPL(phylink_mac_change); void phylink_start(struct phylink *pl) { mutex_lock(&pl->config_mutex); netdev_info(pl->netdev, "configuring for %s link mode\n", phylink_an_mode_str(pl->link_an_mode)); /* 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->phydev) phy_start(pl->phydev); mutex_unlock(&pl->config_mutex); } EXPORT_SYMBOL_GPL(phylink_start); void phylink_stop(struct phylink *pl) { mutex_lock(&pl->config_mutex); if (pl->phydev) phy_stop(pl->phydev); set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); flush_work(&pl->resolve); mutex_unlock(&pl->config_mutex); } EXPORT_SYMBOL_GPL(phylink_stop); static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) { __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); linkmode_zero(mask); phylink_set_port_bits(mask); linkmode_and(dst, dst, mask); linkmode_or(dst, dst, b); } static void phylink_get_ksettings(const struct phylink_link_state *state, struct ethtool_link_ksettings *kset) { phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); kset->base.speed = state->speed; kset->base.duplex = state->duplex; kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE : AUTONEG_DISABLE; } static int __phylink_ethtool_ksettings_get(struct phylink *pl, struct ethtool_link_ksettings *kset) { struct phylink_link_state link_state; int ret; if (pl->phydev) { ret = phy_ethtool_ksettings_get(pl->phydev, kset); if (ret) return ret; } else { kset->base.port = pl->link_port; } linkmode_copy(kset->link_modes.supported, pl->supported); switch (pl->link_an_mode) { case MLO_AN_FIXED: /* We are using fixed settings. Report these as the * current link settings - and note that these also * represent the supported speeds/duplex/pause modes. */ phylink_get_fixed_state(pl, &link_state); phylink_get_ksettings(&link_state, kset); break; case MLO_AN_SGMII: /* If there is a phy attached, then use the reported * settings from the phy with no modification. */ if (pl->phydev) break; case MLO_AN_8023Z: phylink_get_mac_state(pl, &link_state); /* The MAC is reporting the link results from its own PCS * layer via in-band status. Report these as the current * link settings. */ phylink_get_ksettings(&link_state, kset); break; } return 0; } int phylink_ethtool_ksettings_get(struct phylink *pl, struct ethtool_link_ksettings *kset) { int ret; mutex_lock(&pl->config_mutex); ret = __phylink_ethtool_ksettings_get(pl, kset); mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); static int __phylink_ethtool_ksettings_set(struct phylink *pl, const struct ethtool_link_ksettings *kset) { struct ethtool_link_ksettings our_kset = *kset; int ret; /* Mask out unsupported advertisments */ linkmode_and(our_kset.link_modes.advertising, kset->link_modes.advertising, pl->supported); if (pl->ops->validate_advert) pl->ops->validate_advert(pl->netdev, pl->link_an_mode, pl->supported, our_kset.link_modes.advertising); /* FIXME: should we reject autoneg if phy/mac does not support it? */ if (kset->base.autoneg == AUTONEG_DISABLE) { const struct phy_setting *s; /* Autonegotiation disabled, select a suitable speed and * duplex. */ s = phy_lookup_setting(kset->base.speed, kset->base.duplex, pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS, false); if (!s) return -EINVAL; /* If we have a fixed link (as specified by firmware), refuse * to change link parameters. */ if (pl->link_an_mode == MLO_AN_FIXED && (s->speed != pl->link_config.speed || s->duplex != pl->link_config.duplex)) return -EINVAL; our_kset.base.speed = s->speed; our_kset.base.duplex = s->duplex; __clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, our_kset.link_modes.advertising); } else { /* If we have a fixed link, refuse to enable autonegotiation */ if (pl->link_an_mode == MLO_AN_FIXED) return -EINVAL; /* Autonegotiation enabled, validate advertisment */ if (phylink_empty_linkmode(our_kset.link_modes.advertising)) return -EINVAL; __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, our_kset.link_modes.advertising); } /* If we have a PHY, configure the phy */ if (pl->phydev) { ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset); if (ret) return ret; } mutex_lock(&pl->state_mutex); /* Configure the MAC to match the new settings */ linkmode_copy(pl->link_config.advertising, our_kset.link_modes.advertising); 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; if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) { phylink_mac_config(pl, &pl->link_config); phylink_mac_an_restart(pl); } mutex_unlock(&pl->state_mutex); return ret; } int phylink_ethtool_ksettings_set(struct phylink *pl, const struct ethtool_link_ksettings *kset) { int ret; if (kset->base.autoneg != AUTONEG_DISABLE && kset->base.autoneg != AUTONEG_ENABLE) return -EINVAL; mutex_lock(&pl->config_mutex); ret = __phylink_ethtool_ksettings_set(pl, kset); mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); int phylink_ethtool_nway_reset(struct phylink *pl) { int ret = 0; mutex_lock(&pl->config_mutex); if (pl->phydev) ret = genphy_restart_aneg(pl->phydev); phylink_mac_an_restart(pl); mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); void phylink_ethtool_get_pauseparam(struct phylink *pl, struct ethtool_pauseparam *pause) { mutex_lock(&pl->config_mutex); pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); mutex_unlock(&pl->config_mutex); } EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); static int __phylink_ethtool_set_pauseparam(struct phylink *pl, struct ethtool_pauseparam *pause) { struct phylink_link_state *config = &pl->link_config; if (!phylink_test(pl->supported, Pause) && !phylink_test(pl->supported, Asym_Pause)) return -EOPNOTSUPP; if (!phylink_test(pl->supported, Asym_Pause) && !pause->autoneg && pause->rx_pause != pause->tx_pause) return -EINVAL; config->pause &= ~(MLO_PAUSE_AN | MLO_PAUSE_TXRX_MASK); if (pause->autoneg) config->pause |= MLO_PAUSE_AN; if (pause->rx_pause) config->pause |= MLO_PAUSE_RX; if (pause->tx_pause) config->pause |= MLO_PAUSE_TX; if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) { switch (pl->link_an_mode) { case MLO_AN_PHY: /* Silently mark the carrier down, and then trigger a resolve */ netif_carrier_off(pl->netdev); phylink_run_resolve(pl); break; case MLO_AN_FIXED: /* Should we allow fixed links to change against the config? */ phylink_resolve_flow(pl, config); phylink_mac_config(pl, config); break; case MLO_AN_SGMII: case MLO_AN_8023Z: phylink_mac_config(pl, config); phylink_mac_an_restart(pl); break; } } return 0; } int phylink_ethtool_set_pauseparam(struct phylink *pl, struct ethtool_pauseparam *pause) { int ret; mutex_lock(&pl->config_mutex); ret = __phylink_ethtool_set_pauseparam(pl, pause); mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); int phylink_ethtool_get_module_info(struct phylink *pl, struct ethtool_modinfo *modinfo) { int ret = -EOPNOTSUPP; mutex_lock(&pl->config_mutex); if (pl->module_ops) ret = pl->module_ops->get_module_info(pl->module_data, modinfo); mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_ethtool_get_module_info); int phylink_ethtool_get_module_eeprom(struct phylink *pl, struct ethtool_eeprom *ee, u8 *buf) { int ret = -EOPNOTSUPP; mutex_lock(&pl->config_mutex); if (pl->module_ops) ret = pl->module_ops->get_module_eeprom(pl->module_data, ee, buf); mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_ethtool_get_module_eeprom); int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) { int ret = -EPROTONOSUPPORT; mutex_lock(&pl->config_mutex); if (pl->phydev) ret = phy_init_eee(pl->phydev, clk_stop_enable); mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_init_eee); int phylink_get_eee_err(struct phylink *pl) { int ret = 0; mutex_lock(&pl->config_mutex); if (pl->phydev) ret = phy_get_eee_err(pl->phydev); mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_get_eee_err); int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) { int ret = -EOPNOTSUPP; mutex_lock(&pl->config_mutex); if (pl->phydev) ret = phy_ethtool_get_eee(pl->phydev, eee); mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) { int ret = -EOPNOTSUPP; mutex_lock(&pl->config_mutex); if (pl->phydev) ret = phy_ethtool_set_eee(pl->phydev, eee); mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); /* This emulates MII registers for a fixed-mode phy operating as per the * passed in state. "aneg" defines if we report negotiation is possible. * * FIXME: should deal with negotiation state too. */ static int phylink_mii_emul_read(struct net_device *ndev, unsigned int reg, struct phylink_link_state *state, bool aneg) { struct fixed_phy_status fs; int val; fs.link = state->link; fs.speed = state->speed; fs.duplex = state->duplex; fs.pause = state->pause & MLO_PAUSE_SYM; fs.asym_pause = state->pause & MLO_PAUSE_ASYM; val = swphy_read_reg(reg, &fs); if (reg == MII_BMSR) { if (!state->an_complete) val &= ~BMSR_ANEGCOMPLETE; if (!aneg) val &= ~BMSR_ANEGCAPABLE; } return val; } static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, unsigned int reg) { struct phy_device *phydev = pl->phydev; int prtad, devad; if (mdio_phy_id_is_c45(phy_id)) { prtad = mdio_phy_id_prtad(phy_id); devad = mdio_phy_id_devad(phy_id); devad = MII_ADDR_C45 | devad << 16 | reg; } else if (phydev->is_c45) { switch (reg) { case MII_BMCR: case MII_BMSR: case MII_PHYSID1: case MII_PHYSID2: devad = __ffs(phydev->c45_ids.devices_in_package); break; case MII_ADVERTISE: case MII_LPA: if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN)) return -EINVAL; devad = MDIO_MMD_AN; if (reg == MII_ADVERTISE) reg = MDIO_AN_ADVERTISE; else reg = MDIO_AN_LPA; break; default: return -EINVAL; } prtad = phy_id; devad = MII_ADDR_C45 | devad << 16 | reg; } else { prtad = phy_id; devad = reg; } return mdiobus_read(pl->phydev->mdio.bus, prtad, devad); } static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, unsigned int reg, unsigned int val) { struct phy_device *phydev = pl->phydev; int prtad, devad; if (mdio_phy_id_is_c45(phy_id)) { prtad = mdio_phy_id_prtad(phy_id); devad = mdio_phy_id_devad(phy_id); devad = MII_ADDR_C45 | devad << 16 | reg; } else if (phydev->is_c45) { switch (reg) { case MII_BMCR: case MII_BMSR: case MII_PHYSID1: case MII_PHYSID2: devad = __ffs(phydev->c45_ids.devices_in_package); break; case MII_ADVERTISE: case MII_LPA: if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN)) return -EINVAL; devad = MDIO_MMD_AN; if (reg == MII_ADVERTISE) reg = MDIO_AN_ADVERTISE; else reg = MDIO_AN_LPA; break; default: return -EINVAL; } prtad = phy_id; devad = MII_ADDR_C45 | devad << 16 | reg; } else { prtad = phy_id; devad = reg; } return mdiobus_write(phydev->mdio.bus, prtad, devad, val); } static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, unsigned int reg) { struct phylink_link_state state; int val = 0xffff; switch (pl->link_an_mode) { case MLO_AN_FIXED: if (phy_id == 0) { phylink_get_fixed_state(pl, &state); val = phylink_mii_emul_read(pl->netdev, reg, &state, true); } break; case MLO_AN_PHY: return -EOPNOTSUPP; case MLO_AN_SGMII: /* No phy, fall through to 8023z method */ case MLO_AN_8023Z: if (phy_id == 0) { val = phylink_get_mac_state(pl, &state); if (val < 0) return val; val = phylink_mii_emul_read(pl->netdev, reg, &state, true); } break; } return val & 0xffff; } static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, unsigned int reg, unsigned int val) { switch (pl->link_an_mode) { case MLO_AN_FIXED: break; case MLO_AN_PHY: return -EOPNOTSUPP; case MLO_AN_SGMII: /* No phy, fall through to 8023z method */ case MLO_AN_8023Z: break; } return 0; } int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) { struct mii_ioctl_data *mii = if_mii(ifr); int ret; mutex_lock(&pl->config_mutex); if (pl->phydev) { /* PHYs only exist for MLO_AN_PHY and MLO_AN_SGMII */ switch (cmd) { case SIOCGMIIPHY: mii->phy_id = pl->phydev->mdio.addr; case SIOCGMIIREG: ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); if (ret >= 0) { mii->val_out = ret; ret = 0; } break; case SIOCSMIIREG: ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, mii->val_in); break; default: ret = phy_mii_ioctl(pl->phydev, ifr, cmd); break; } } else { switch (cmd) { case SIOCGMIIPHY: mii->phy_id = 0; case SIOCGMIIREG: ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); if (ret >= 0) { mii->val_out = ret; ret = 0; } break; case SIOCSMIIREG: ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, mii->val_in); break; default: ret = -EOPNOTSUPP; break; } } mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_mii_ioctl); int phylink_register_module(struct phylink *pl, void *data, const struct phylink_module_ops *ops) { int ret = -EBUSY; mutex_lock(&pl->config_mutex); if (!pl->module_ops) { pl->module_ops = ops; pl->module_data = data; ret = 0; } mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_register_module); int phylink_unregister_module(struct phylink *pl, void *data) { int ret = -EINVAL; mutex_lock(&pl->config_mutex); if (pl->module_data == data) { pl->module_ops = NULL; pl->module_data = NULL; ret = 0; } mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_unregister_module); void phylink_disable(struct phylink *pl) { set_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state); flush_work(&pl->resolve); netif_carrier_off(pl->netdev); } EXPORT_SYMBOL_GPL(phylink_disable); void phylink_enable(struct phylink *pl) { clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state); phylink_run_resolve(pl); } EXPORT_SYMBOL_GPL(phylink_enable); int phylink_set_link(struct phylink *pl, unsigned int mode, u8 port, const unsigned long *support) { __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); int ret = 0; netdev_dbg(pl->netdev, "requesting link mode %s with support %*pb\n", phylink_an_mode_str(mode), __ETHTOOL_LINK_MODE_MASK_NBITS, support); if (mode == MLO_AN_FIXED) return -EINVAL; linkmode_copy(mask, support); /* Ignore errors if we're expecting a PHY to attach later */ ret = phylink_validate_support(pl, mode, mask); if (ret && mode != MLO_AN_PHY) return ret; mutex_lock(&pl->config_mutex); if (mode == MLO_AN_8023Z && pl->phydev) { ret = -EINVAL; } else { bool changed = !bitmap_equal(pl->supported, mask, __ETHTOOL_LINK_MODE_MASK_NBITS); if (changed) { linkmode_copy(pl->supported, mask); phylink_init_advert(pl, mode, mask, pl->link_config.advertising); } if (pl->link_an_mode != mode) { pl->link_an_mode = mode; changed = true; netdev_info(pl->netdev, "switched to %s link mode\n", phylink_an_mode_str(mode)); } pl->link_port = port; if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) phylink_mac_config(pl, &pl->link_config); } mutex_unlock(&pl->config_mutex); return ret; } EXPORT_SYMBOL_GPL(phylink_set_link); struct phylink *phylink_lookup_by_netdev(struct net_device *ndev) { struct phylink *pl, *found = NULL; mutex_lock(&phylink_mutex); list_for_each_entry(pl, &phylinks, node) if (pl->netdev == ndev) { found = pl; break; } mutex_unlock(&phylink_mutex); return found; } EXPORT_SYMBOL_GPL(phylink_lookup_by_netdev); MODULE_LICENSE("GPL");