diff options
Diffstat (limited to 'drivers/net/phy/phylink.c')
| -rw-r--r-- | drivers/net/phy/phylink.c | 745 |
1 files changed, 571 insertions, 174 deletions
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index ed0b4ccaa6a6..b905a6b93d80 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -56,7 +56,8 @@ struct phylink { struct phy_device *phydev; phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ u8 cfg_link_an_mode; /* MLO_AN_xxx */ - u8 cur_link_an_mode; + u8 req_link_an_mode; /* Requested MLO_AN_xxx mode */ + u8 act_link_an_mode; /* Active MLO_AN_xxx mode */ u8 link_port; /* The current non-phy ethtool port */ __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); @@ -86,6 +87,9 @@ struct phylink { DECLARE_PHY_INTERFACE_MASK(sfp_interfaces); __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); u8 sfp_port; + + struct eee_config eee_cfg; + bool eee_active; }; #define phylink_printk(level, pl, fmt, ...) \ @@ -175,6 +179,24 @@ static const char *phylink_an_mode_str(unsigned int mode) return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; } +static const char *phylink_pcs_mode_str(unsigned int mode) +{ + if (!mode) + return "none"; + + if (mode & PHYLINK_PCS_NEG_OUTBAND) + return "outband"; + + if (mode & PHYLINK_PCS_NEG_INBAND) { + if (mode & PHYLINK_PCS_NEG_ENABLED) + return "inband/an-enabled"; + else + return "inband/an-disabled"; + } + + return "unknown"; +} + static unsigned int phylink_interface_signal_rate(phy_interface_t interface) { switch (interface) { @@ -893,7 +915,7 @@ static int phylink_parse_mode(struct phylink *pl, if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && strcmp(managed, "in-band-status") == 0) || pl->config->ovr_an_inband) { - if (pl->cfg_link_an_mode == MLO_AN_FIXED) { + if (phylink_mode_fixed(pl->cfg_link_an_mode)) { phylink_err(pl, "can't use both fixed-link and in-band-status\n"); return -EINVAL; @@ -977,6 +999,15 @@ static void phylink_resolve_an_pause(struct phylink_link_state *state) } } +static unsigned int phylink_pcs_query_inband(struct phylink_pcs *pcs, + phy_interface_t interface) +{ + if (pcs && pcs->ops->pcs_query_inband) + return pcs->ops->pcs_query_inband(pcs, interface); + + return 0; +} + static void phylink_pcs_pre_config(struct phylink_pcs *pcs, phy_interface_t interface) { @@ -1030,15 +1061,34 @@ static void phylink_pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode, pcs->ops->pcs_link_up(pcs, neg_mode, interface, speed, duplex); } +/* Query inband for a specific interface mode, asking the MAC for the + * PCS which will be used to handle the interface mode. + */ +static unsigned int phylink_query_inband(struct phylink *pl, + phy_interface_t interface) +{ + struct phylink_pcs *pcs; + + if (!pl->using_mac_select_pcs) + return 0; + + pcs = pl->mac_ops->mac_select_pcs(pl->config, interface); + if (!pcs) + return 0; + + return phylink_pcs_query_inband(pcs, interface); +} + static void phylink_pcs_poll_stop(struct phylink *pl) { - if (pl->cfg_link_an_mode == MLO_AN_INBAND) + if (phylink_mode_inband(pl->cfg_link_an_mode)) del_timer(&pl->link_poll); } static void phylink_pcs_poll_start(struct phylink *pl) { - if (pl->pcs && pl->pcs->poll && pl->cfg_link_an_mode == MLO_AN_INBAND) + if (pl->pcs && pl->pcs->poll && + phylink_mode_inband(pl->cfg_link_an_mode)) mod_timer(&pl->link_poll, jiffies + HZ); } @@ -1056,13 +1106,13 @@ static void phylink_mac_config(struct phylink *pl, phylink_dbg(pl, "%s: mode=%s/%s/%s adv=%*pb pause=%02x\n", - __func__, phylink_an_mode_str(pl->cur_link_an_mode), + __func__, phylink_an_mode_str(pl->act_link_an_mode), phy_modes(st.interface), phy_rate_matching_to_str(st.rate_matching), __ETHTOOL_LINK_MODE_MASK_NBITS, st.advertising, st.pause); - pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, &st); + pl->mac_ops->mac_config(pl->config, pl->act_link_an_mode, &st); } static void phylink_pcs_an_restart(struct phylink *pl) @@ -1070,12 +1120,14 @@ static void phylink_pcs_an_restart(struct phylink *pl) if (pl->pcs && linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, pl->link_config.advertising) && phy_interface_mode_is_8023z(pl->link_config.interface) && - phylink_autoneg_inband(pl->cur_link_an_mode)) + phylink_autoneg_inband(pl->act_link_an_mode)) pl->pcs->ops->pcs_an_restart(pl->pcs); } /** * phylink_pcs_neg_mode() - helper to determine PCS inband mode + * @pl: a pointer to a &struct phylink returned from phylink_create() + * @pcs: a pointer to &struct phylink_pcs * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND. * @interface: interface mode to be used * @advertising: adertisement ethtool link mode mask @@ -1093,11 +1145,19 @@ static void phylink_pcs_an_restart(struct phylink *pl) * Note: this is for cases where the PCS itself is involved in negotiation * (e.g. Clause 37, SGMII and similar) not Clause 73. */ -static unsigned int phylink_pcs_neg_mode(unsigned int mode, +static unsigned int phylink_pcs_neg_mode(struct phylink *pl, + struct phylink_pcs *pcs, + unsigned int mode, phy_interface_t interface, const unsigned long *advertising) { + unsigned int phy_link_mode = 0; + unsigned int pcs_link_mode; unsigned int neg_mode; + enum { + INBAND_CISCO_SGMII, + INBAND_8023Z, + } type; switch (interface) { case PHY_INTERFACE_MODE_SGMII: @@ -1109,10 +1169,7 @@ static unsigned int phylink_pcs_neg_mode(unsigned int mode, * inband communication. Note: there exist PHYs that run * with SGMII but do not send the inband data. */ - if (!phylink_autoneg_inband(mode)) - neg_mode = PHYLINK_PCS_NEG_OUTBAND; - else - neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; + type = INBAND_CISCO_SGMII; break; case PHY_INTERFACE_MODE_1000BASEX: @@ -1123,23 +1180,128 @@ static unsigned int phylink_pcs_neg_mode(unsigned int mode, * as well, but drivers may not support this, so may * need to override this. */ - if (!phylink_autoneg_inband(mode)) - neg_mode = PHYLINK_PCS_NEG_OUTBAND; - else if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, - advertising)) - neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; - else - neg_mode = PHYLINK_PCS_NEG_INBAND_DISABLED; + type = INBAND_8023Z; break; default: - neg_mode = PHYLINK_PCS_NEG_NONE; - break; + return PHYLINK_PCS_NEG_NONE; } + pcs_link_mode = phylink_pcs_query_inband(pcs, interface); + pcs_link_mode &= LINK_INBAND_DISABLE | LINK_INBAND_ENABLE; + if (pl->phydev) { + phy_link_mode = phy_query_inband(pl->phydev, interface); + phy_link_mode &= LINK_INBAND_DISABLE | LINK_INBAND_ENABLE; + } + + if (!phylink_autoneg_inband(mode)) { + const char *s1, *s2, *s3, *empty = ""; + + s1 = s2 = s3 = empty; + + if (pcs_link_mode == LINK_INBAND_ENABLE) + s1 = "PCS"; + + if (phy_link_mode == LINK_INBAND_ENABLE) + s3 = "PHY"; + + /* If either the PCS or PHY requires inband to be enabled, + * this is an invalid configuration. Provide a diagnostic + * message for this case, but don't try to force the issue. + */ + if (s1 != empty || s3 != empty) { + if (s1 != empty && s3 != empty) + s2 = " and "; + + phylink_warn(pl, + "firmware wants %s mode, but %s%s%s requires inband\n", + phylink_an_mode_str(mode), + s1, s2, s3); + } + return PHYLINK_PCS_NEG_OUTBAND; + } + + /* For SGMII modes, which are designed to be used with PHYs, we + * try to use inband mode where-ever possible. However, there are + * some PHYs e.g. BCM84881 which do not support in-band. + */ + if (type == INBAND_CISCO_SGMII) { + /* PCS PHY + * D E D E + * 0 0 0 0 no information inband enabled + * 1 0 0 0 pcs doesn't support outband + * 0 1 0 0 pcs required inband enabled + * 1 1 0 0 pcs optional inband enabled + * 0 0 1 0 phy doesn't support outband + * 1 0 1 0 pcs+phy doesn't support outband + * 0 1 1 0 pcs required, phy doesn't support, invalid + * 1 1 1 0 pcs optional, phy doesn't support, outband + * 0 0 0 1 phy required inband enabled + * 1 0 0 1 pcs doesn't support, phy required, invalid + * 0 1 0 1 pcs+phy required inband enabled + * 1 1 0 1 pcs optional, phy required inband enabled + * 0 0 1 1 phy optional inband enabled + * 1 0 1 1 pcs doesn't support, phy optional, outband + * 0 1 1 1 pcs required, phy optional inband enabled + * 1 1 1 1 pcs+phy optional inband enabled + */ + if (!pcs_link_mode) + pcs_link_mode = LINK_INBAND_DISABLE | LINK_INBAND_ENABLE; + + if (!phy_link_mode) + phy_link_mode = LINK_INBAND_DISABLE | LINK_INBAND_ENABLE; + + if (pcs_link_mode & phy_link_mode & LINK_INBAND_ENABLE) { + /* inband supported at both ends */ + return PHYLINK_PCS_NEG_INBAND_ENABLED; + } else if (pcs_link_mode & phy_link_mode & LINK_INBAND_DISABLE) { + /* inband not supported at both ends */ + return PHYLINK_PCS_NEG_OUTBAND; + } else { + /* invalid */ + } + } + + /* For 802.3z, handle the PHY present vs absent cases separately */ + if (!pl->phydev) { + /* PHY absent: always use inband but inband may be disabled */ + /* If the PCS doesn't support inband, then inband must be + * disabled. + */ + if (pcs_link_mode == LINK_INBAND_DISABLE) + return PHYLINK_PCS_NEG_INBAND_DISABLED; + + /* If the PCS requires inband, then inband must always be + * enabled. + */ + if (pcs_link_mode == LINK_INBAND_ENABLE) + return PHYLINK_PCS_NEG_INBAND_ENABLED; + + /* For the possible case, fall through to the "legacy" code. */ + } else { + /* PHY present, inband mode depends on the capabilities + * of both. + */ + } + + /* Legacy, so determine inband depending on the advertising bit */ + if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, advertising)) + neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; + else + neg_mode = PHYLINK_PCS_NEG_INBAND_DISABLED; + return neg_mode; } +static u8 phylink_choose_act_link_an_mode(struct phylink *pl) +{ + if (pl->req_link_an_mode == MLO_AN_INBAND && pl->phydev && + pl->pcs_neg_mode == PHYLINK_PCS_NEG_OUTBAND) + return MLO_AN_PHY; + + return pl->req_link_an_mode; +} + static void phylink_major_config(struct phylink *pl, bool restart, const struct phylink_link_state *state) { @@ -1149,11 +1311,9 @@ static void phylink_major_config(struct phylink *pl, bool restart, unsigned int neg_mode; int err; - phylink_dbg(pl, "major config %s\n", phy_modes(state->interface)); - - pl->pcs_neg_mode = phylink_pcs_neg_mode(pl->cur_link_an_mode, - state->interface, - state->advertising); + phylink_dbg(pl, "major config, requested %s/%s\n", + phylink_an_mode_str(pl->req_link_an_mode), + phy_modes(state->interface)); if (pl->using_mac_select_pcs) { pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); @@ -1167,10 +1327,25 @@ static void phylink_major_config(struct phylink *pl, bool restart, pcs_changed = pcs && pl->pcs != pcs; } + pl->pcs_neg_mode = phylink_pcs_neg_mode(pl, pcs, + pl->req_link_an_mode, + state->interface, + state->advertising); + + /* set the active link AN mode, which may end up different from the + * current link AN mode depending on the PCS and PHY capabilities. + */ + pl->act_link_an_mode = phylink_choose_act_link_an_mode(pl); + + phylink_dbg(pl, "major config, active %s/%s/%s\n", + phylink_an_mode_str(pl->act_link_an_mode), + phylink_pcs_mode_str(pl->pcs_neg_mode), + phy_modes(state->interface)); + phylink_pcs_poll_stop(pl); if (pl->mac_ops->mac_prepare) { - err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode, + err = pl->mac_ops->mac_prepare(pl->config, pl->act_link_an_mode, state->interface); if (err < 0) { phylink_err(pl, "mac_prepare failed: %pe\n", @@ -1204,7 +1379,7 @@ static void phylink_major_config(struct phylink *pl, bool restart, if (pl->pcs_state == PCS_STATE_STARTING || pcs_changed) phylink_pcs_enable(pl->pcs); - neg_mode = pl->cur_link_an_mode; + neg_mode = pl->act_link_an_mode; if (pl->pcs && pl->pcs->neg_mode) neg_mode = pl->pcs_neg_mode; @@ -1220,7 +1395,7 @@ static void phylink_major_config(struct phylink *pl, bool restart, phylink_pcs_an_restart(pl); if (pl->mac_ops->mac_finish) { - err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode, + err = pl->mac_ops->mac_finish(pl->config, pl->act_link_an_mode, state->interface); if (err < 0) phylink_err(pl, "mac_finish failed: %pe\n", @@ -1251,17 +1426,23 @@ static int phylink_change_inband_advert(struct phylink *pl) return 0; phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, - phylink_an_mode_str(pl->cur_link_an_mode), + phylink_an_mode_str(pl->req_link_an_mode), phy_modes(pl->link_config.interface), __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, pl->link_config.pause); /* Recompute the PCS neg mode */ - pl->pcs_neg_mode = phylink_pcs_neg_mode(pl->cur_link_an_mode, - pl->link_config.interface, - pl->link_config.advertising); + pl->pcs_neg_mode = phylink_pcs_neg_mode(pl, pl->pcs, + pl->req_link_an_mode, + pl->link_config.interface, + pl->link_config.advertising); + + /* set the active link AN mode, which may end up different from the + * current link AN mode depending on the PCS and PHY capabilities. + */ + pl->act_link_an_mode = phylink_choose_act_link_an_mode(pl); - neg_mode = pl->cur_link_an_mode; + neg_mode = pl->act_link_an_mode; if (pl->pcs->neg_mode) neg_mode = pl->pcs_neg_mode; @@ -1326,7 +1507,7 @@ static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) { struct phylink_link_state link_state; - switch (pl->cur_link_an_mode) { + switch (pl->req_link_an_mode) { case MLO_AN_PHY: link_state = pl->phy_state; break; @@ -1365,6 +1546,75 @@ static const char *phylink_pause_to_str(int pause) } } +static void phylink_disable_tx_lpi(struct phylink *pl) +{ + phylink_dbg(pl, "disabling tx_lpi\n"); + + if (pl->mac_ops->mac_disable_tx_lpi) + pl->mac_ops->mac_disable_tx_lpi(pl->config); +} + +static void phylink_enable_tx_lpi(struct phylink *pl) +{ + phylink_dbg(pl, "enabling tx_lpi, timer %uus\n", + pl->eee_cfg.tx_lpi_timer); + + if (pl->mac_ops->mac_enable_tx_lpi) + pl->mac_ops->mac_enable_tx_lpi(pl->config, + pl->eee_cfg.tx_lpi_timer); +} + +static bool phylink_eee_is_active(struct phylink *pl) +{ + return phylink_init_eee(pl, pl->config->eee_clk_stop_enable) >= 0; +} + +static void phylink_deactivate_eee(struct phylink *pl) +{ + phylink_dbg(pl, "deactivating EEE, was %sactive\n", + pl->eee_active ? "" : "in"); + + if (pl->eee_active) { + pl->eee_active = false; + phylink_disable_tx_lpi(pl); + } +} + +static void phylink_activate_eee(struct phylink *pl) +{ + pl->eee_active = phylink_eee_is_active(pl); + + phylink_dbg(pl, "can LPI, EEE enabled, %sactive\n", + pl->eee_active ? "" : "in"); + + if (pl->eee_active) + phylink_enable_tx_lpi(pl); +} + +/* Determine whether the MAC has new EEE support. We detect this by checking + * for the two new methods being present, but for DSA it will populate these + * anyway, so also check that lpi_capabilities is non-zero. + */ +static bool phylink_mac_supports_eee(struct phylink *pl) +{ + return pl->mac_ops->mac_disable_tx_lpi && + pl->mac_ops->mac_enable_tx_lpi && + pl->config->lpi_capabilities; +} + +static void phylink_phy_restrict_eee(struct phylink *pl, struct phy_device *phy) +{ + __ETHTOOL_DECLARE_LINK_MODE_MASK(eee_supported); + + /* Convert the MAC's LPI capabilities to linkmodes */ + linkmode_zero(eee_supported); + phylink_caps_to_linkmodes(eee_supported, pl->config->lpi_capabilities); + + /* Mask out EEE modes that are not supported */ + linkmode_and(phy->supported_eee, phy->supported_eee, eee_supported); + linkmode_and(phy->advertising_eee, phy->advertising_eee, eee_supported); +} + static void phylink_link_up(struct phylink *pl, struct phylink_link_state link_state) { @@ -1400,17 +1650,20 @@ static void phylink_link_up(struct phylink *pl, pl->cur_interface = link_state.interface; - neg_mode = pl->cur_link_an_mode; + neg_mode = pl->act_link_an_mode; if (pl->pcs && pl->pcs->neg_mode) neg_mode = pl->pcs_neg_mode; phylink_pcs_link_up(pl->pcs, neg_mode, pl->cur_interface, speed, duplex); - pl->mac_ops->mac_link_up(pl->config, pl->phydev, pl->cur_link_an_mode, + pl->mac_ops->mac_link_up(pl->config, pl->phydev, pl->act_link_an_mode, pl->cur_interface, speed, duplex, !!(link_state.pause & MLO_PAUSE_TX), rx_pause); + if (eeecfg_mac_can_tx_lpi(&pl->eee_cfg)) + phylink_activate_eee(pl); + if (ndev) netif_carrier_on(ndev); @@ -1427,25 +1680,29 @@ static void phylink_link_down(struct phylink *pl) if (ndev) netif_carrier_off(ndev); - pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode, + + phylink_deactivate_eee(pl); + + pl->mac_ops->mac_link_down(pl->config, pl->act_link_an_mode, pl->cur_interface); phylink_info(pl, "Link is Down\n"); } +static bool phylink_link_is_up(struct phylink *pl) +{ + return pl->netdev ? netif_carrier_ok(pl->netdev) : pl->old_link_state; +} + 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; bool mac_config = false; bool retrigger = false; bool cur_link_state; mutex_lock(&pl->state_mutex); - if (pl->netdev) - cur_link_state = netif_carrier_ok(ndev); - else - cur_link_state = pl->old_link_state; + cur_link_state = phylink_link_is_up(pl); if (pl->phylink_disable_state) { pl->mac_link_dropped = false; @@ -1453,76 +1710,73 @@ static void phylink_resolve(struct work_struct *w) } else if (pl->mac_link_dropped) { link_state.link = false; retrigger = true; - } else { - switch (pl->cur_link_an_mode) { - case MLO_AN_PHY: + } else if (pl->act_link_an_mode == MLO_AN_FIXED) { + phylink_get_fixed_state(pl, &link_state); + mac_config = link_state.link; + } else if (pl->act_link_an_mode == MLO_AN_PHY) { + /* PHY mode, or PCS configured for outband mode */ + if (pl->phydev) { link_state = pl->phy_state; - phylink_apply_manual_flow(pl, &link_state); - mac_config = link_state.link; - break; + } else { + /* No PHY - assume link is down */ + link_state.link = false; + } + mac_config = link_state.link; + } else { + /* Inband mode */ + phylink_mac_pcs_get_state(pl, &link_state); - case MLO_AN_FIXED: - phylink_get_fixed_state(pl, &link_state); - mac_config = link_state.link; - break; + /* The PCS may have a latching link-fail indicator. + * If the link was up, bring the link down and + * re-trigger the resolve. Otherwise, re-read the + * PCS state to get the current status of the link. + */ + if (!link_state.link) { + if (cur_link_state) + retrigger = true; + else + phylink_mac_pcs_get_state(pl, &link_state); + } - case MLO_AN_INBAND: - phylink_mac_pcs_get_state(pl, &link_state); + /* If we have a phy, the "up" state is the union of + * both the PHY and the MAC + */ + if (pl->phydev) + link_state.link &= pl->phy_state.link; - /* The PCS may have a latching link-fail indicator. - * If the link was up, bring the link down and - * re-trigger the resolve. Otherwise, re-read the - * PCS state to get the current status of the link. + /* Only update if the PHY link is up */ + if (pl->phydev && pl->phy_state.link) { + /* If the interface has changed, force a + * link down event if the link isn't already + * down, and re-resolve. */ - if (!link_state.link) { - if (cur_link_state) - retrigger = true; - else - phylink_mac_pcs_get_state(pl, - &link_state); + if (link_state.interface != pl->phy_state.interface) { + retrigger = true; + link_state.link = false; } + link_state.interface = pl->phy_state.interface; - /* If we have a phy, the "up" state is the union of - * both the PHY and the MAC + /* If we are doing rate matching, then the + * link speed/duplex comes from the PHY */ - if (pl->phydev) - link_state.link &= pl->phy_state.link; - - /* Only update if the PHY link is up */ - if (pl->phydev && pl->phy_state.link) { - /* If the interface has changed, force a - * link down event if the link isn't already - * down, and re-resolve. - */ - if (link_state.interface != - pl->phy_state.interface) { - retrigger = true; - link_state.link = false; - } - link_state.interface = pl->phy_state.interface; - - /* If we are doing rate matching, then the - * link speed/duplex comes from the PHY - */ - if (pl->phy_state.rate_matching) { - link_state.rate_matching = - pl->phy_state.rate_matching; - link_state.speed = pl->phy_state.speed; - link_state.duplex = - pl->phy_state.duplex; - } - - /* If we have a PHY, we need to update with - * the PHY flow control bits. - */ - link_state.pause = pl->phy_state.pause; - mac_config = true; + if (pl->phy_state.rate_matching) { + link_state.rate_matching = + pl->phy_state.rate_matching; + link_state.speed = pl->phy_state.speed; + link_state.duplex = pl->phy_state.duplex; } - phylink_apply_manual_flow(pl, &link_state); - break; + + /* If we have a PHY, we need to update with + * the PHY flow control bits. + */ + link_state.pause = pl->phy_state.pause; + mac_config = true; } } + if (pl->act_link_an_mode != MLO_AN_FIXED) + phylink_apply_manual_flow(pl, &link_state); + if (mac_config) { if (link_state.interface != pl->link_config.interface) { /* The interface has changed, force the link down and @@ -1683,13 +1937,16 @@ struct phylink *phylink_create(struct phylink_config *config, linkmode_copy(pl->link_config.advertising, pl->supported); phylink_validate(pl, pl->supported, &pl->link_config); + /* Set the default EEE configuration */ + pl->eee_cfg = pl->config->eee; + ret = phylink_parse_mode(pl, fwnode); if (ret < 0) { kfree(pl); return ERR_PTR(ret); } - if (pl->cfg_link_an_mode == MLO_AN_FIXED) { + if (phylink_mode_fixed(pl->cfg_link_an_mode)) { ret = phylink_parse_fixedlink(pl, fwnode); if (ret < 0) { kfree(pl); @@ -1697,7 +1954,8 @@ struct phylink *phylink_create(struct phylink_config *config, } } - pl->cur_link_an_mode = pl->cfg_link_an_mode; + pl->req_link_an_mode = pl->cfg_link_an_mode; + pl->act_link_an_mode = pl->req_link_an_mode; ret = phylink_register_sfp(pl, fwnode); if (ret < 0) { @@ -1823,6 +2081,9 @@ static int phylink_validate_phy(struct phylink *pl, struct phy_device *phy, interfaces); } + phylink_dbg(pl, "PHY %s doesn't supply possible interfaces\n", + phydev_name(phy)); + /* Check whether we would use rate matching for the proposed interface * mode. */ @@ -1902,6 +2163,13 @@ static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, /* Restrict the phy advertisement according to the MAC support. */ linkmode_copy(phy->advertising, config.advertising); + + /* If the MAC supports phylink managed EEE, restrict the EEE + * advertisement according to the MAC's LPI capabilities. + */ + if (phylink_mac_supports_eee(pl)) + phylink_phy_restrict_eee(pl, phy); + mutex_unlock(&pl->state_mutex); mutex_unlock(&phy->lock); @@ -1923,8 +2191,8 @@ static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, phy_interface_t interface) { - if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || - (pl->cfg_link_an_mode == MLO_AN_INBAND && + if (WARN_ON(phylink_mode_fixed(pl->cfg_link_an_mode) || + (phylink_mode_inband(pl->cfg_link_an_mode) && phy_interface_mode_is_8023z(interface) && !pl->sfp_bus))) return -EINVAL; @@ -2010,14 +2278,14 @@ int phylink_fwnode_phy_connect(struct phylink *pl, int ret; /* Fixed links and 802.3z are handled without needing a PHY */ - if (pl->cfg_link_an_mode == MLO_AN_FIXED || - (pl->cfg_link_an_mode == MLO_AN_INBAND && + if (phylink_mode_fixed(pl->cfg_link_an_mode) || + (phylink_mode_inband(pl->cfg_link_an_mode) && phy_interface_mode_is_8023z(pl->link_interface))) return 0; phy_fwnode = fwnode_get_phy_node(fwnode); if (IS_ERR(phy_fwnode)) { - if (pl->cfg_link_an_mode == MLO_AN_PHY) + if (phylink_mode_phy(pl->cfg_link_an_mode)) return -ENODEV; return 0; } @@ -2141,7 +2409,7 @@ void phylink_start(struct phylink *pl) ASSERT_RTNL(); phylink_info(pl, "configuring for %s/%s link mode\n", - phylink_an_mode_str(pl->cur_link_an_mode), + phylink_an_mode_str(pl->req_link_an_mode), phy_modes(pl->link_config.interface)); /* Always set the carrier off */ @@ -2164,7 +2432,7 @@ void phylink_start(struct phylink *pl) phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED); - if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { + if (phylink_mode_fixed(pl->cfg_link_an_mode) && pl->link_gpio) { int irq = gpiod_to_irq(pl->link_gpio); if (irq > 0) { @@ -2352,6 +2620,32 @@ int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) } EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); +static phy_interface_t phylink_sfp_select_interface(struct phylink *pl, + const unsigned long *link_modes) +{ + phy_interface_t interface; + + interface = sfp_select_interface(pl->sfp_bus, link_modes); + if (interface == PHY_INTERFACE_MODE_NA) { + phylink_err(pl, + "selection of interface failed, advertisement %*pb\n", + __ETHTOOL_LINK_MODE_MASK_NBITS, + link_modes); + return interface; + } + + if (!test_bit(interface, pl->config->supported_interfaces)) { + phylink_err(pl, + "selection of interface failed - SFP selected %s (%u) but MAC supports %*pbl\n", + phy_modes(interface), interface, + (int)PHY_INTERFACE_MODE_MAX, + pl->config->supported_interfaces); + return PHY_INTERFACE_MODE_NA; + } + + return interface; +} + static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) { __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); @@ -2400,7 +2694,7 @@ int phylink_ethtool_ksettings_get(struct phylink *pl, linkmode_copy(kset->link_modes.supported, pl->supported); - switch (pl->cur_link_an_mode) { + switch (pl->act_link_an_mode) { case MLO_AN_FIXED: /* We are using fixed settings. Report these as the * current link settings - and note that these also @@ -2431,6 +2725,26 @@ int phylink_ethtool_ksettings_get(struct phylink *pl, } EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); +static bool phylink_validate_pcs_inband_autoneg(struct phylink *pl, + phy_interface_t interface, + unsigned long *adv) +{ + unsigned int inband = phylink_query_inband(pl, interface); + unsigned int mask; + + /* If the PCS doesn't implement inband support, be permissive. */ + if (!inband) + return true; + + if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv)) + mask = LINK_INBAND_ENABLE; + else + mask = LINK_INBAND_DISABLE; + + /* Check whether the PCS implements the required mode */ + return !!(inband & mask); +} + /** * phylink_ethtool_ksettings_set() - set the link settings * @pl: a pointer to a &struct phylink returned from phylink_create() @@ -2492,7 +2806,7 @@ int phylink_ethtool_ksettings_set(struct phylink *pl, /* If we have a fixed link, refuse to change link parameters. * If the link parameters match, accept them but do nothing. */ - if (pl->cur_link_an_mode == MLO_AN_FIXED) { + if (phylink_mode_fixed(pl->req_link_an_mode)) { if (s->speed != pl->link_config.speed || s->duplex != pl->link_config.duplex) return -EINVAL; @@ -2508,7 +2822,7 @@ int phylink_ethtool_ksettings_set(struct phylink *pl, * is our default case) but do not allow the advertisement to * be changed. If the advertisement matches, simply return. */ - if (pl->cur_link_an_mode == MLO_AN_FIXED) { + if (phylink_mode_fixed(pl->req_link_an_mode)) { if (!linkmode_equal(config.advertising, pl->link_config.advertising)) return -EINVAL; @@ -2534,21 +2848,16 @@ int phylink_ethtool_ksettings_set(struct phylink *pl, * link can be configured correctly. */ if (pl->sfp_bus) { - config.interface = sfp_select_interface(pl->sfp_bus, + config.interface = phylink_sfp_select_interface(pl, config.advertising); - if (config.interface == PHY_INTERFACE_MODE_NA) { - phylink_err(pl, - "selection of interface failed, advertisement %*pb\n", - __ETHTOOL_LINK_MODE_MASK_NBITS, - config.advertising); + if (config.interface == PHY_INTERFACE_MODE_NA) return -EINVAL; - } /* Revalidate with the selected interface */ linkmode_copy(support, pl->supported); if (phylink_validate(pl, support, &config)) { phylink_err(pl, "validation of %s/%s with support %*pb failed\n", - phylink_an_mode_str(pl->cur_link_an_mode), + phylink_an_mode_str(pl->req_link_an_mode), phy_modes(config.interface), __ETHTOOL_LINK_MODE_MASK_NBITS, support); return -EINVAL; @@ -2566,6 +2875,13 @@ int phylink_ethtool_ksettings_set(struct phylink *pl, phylink_is_empty_linkmode(config.advertising)) return -EINVAL; + /* Validate the autonegotiation state. We don't have a PHY in this + * situation, so the PCS is the media-facing entity. + */ + if (!phylink_validate_pcs_inband_autoneg(pl, config.interface, + config.advertising)) + return -EINVAL; + mutex_lock(&pl->state_mutex); pl->link_config.speed = config.speed; pl->link_config.duplex = config.duplex; @@ -2648,7 +2964,7 @@ int phylink_ethtool_set_pauseparam(struct phylink *pl, ASSERT_RTNL(); - if (pl->cur_link_an_mode == MLO_AN_FIXED) + if (phylink_mode_fixed(pl->req_link_an_mode)) return -EOPNOTSUPP; if (!phylink_test(pl->supported, Pause) && @@ -2756,6 +3072,8 @@ int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) if (pl->phydev) ret = phy_init_eee(pl->phydev, clk_stop_enable); + else if (pl->sfp_bus && phylink_mac_supports_eee(pl)) + ret = 0; return ret; } @@ -2772,8 +3090,19 @@ int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) ASSERT_RTNL(); - if (pl->phydev) + if (pl->phydev) { ret = phy_ethtool_get_eee(pl->phydev, eee); + } else if (pl->sfp_bus && phylink_mac_supports_eee(pl)) { + /* For optical SFPs, ensure that eee->supported is nonzero. */ + eee->supported = SUPPORTED_FIBRE; + ret = 0; + } + + if (!ret && phylink_mac_supports_eee(pl)) { + /* Overwrite phylib's interpretation of configuration */ + eeecfg_to_eee(&pl->eee_cfg, eee); + eee->eee_active = pl->eee_active; + } return ret; } @@ -2787,11 +3116,52 @@ EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) { int ret = -EOPNOTSUPP; + bool mac_eee; ASSERT_RTNL(); + mac_eee = phylink_mac_supports_eee(pl); + + phylink_dbg(pl, "mac %s phylink EEE%s, adv 0x%08x, LPI%s timer %uus\n", + mac_eee ? "supports" : "does not support", + eee->eee_enabled ? ", enabled" : "", eee->advertised, + eee->tx_lpi_enabled ? " enabled" : "", eee->tx_lpi_timer); + + /* Clamp the LPI timer maximum value */ + if (mac_eee && eee->tx_lpi_timer > pl->config->lpi_timer_limit_us) { + eee->tx_lpi_timer = pl->config->lpi_timer_limit_us; + phylink_dbg(pl, "LPI timer limited to %uus\n", + eee->tx_lpi_timer); + } + if (pl->phydev) ret = phy_ethtool_set_eee(pl->phydev, eee); + else if (pl->sfp_bus && phylink_mac_supports_eee(pl)) + ret = 0; + + if (!ret && mac_eee) { + bool can_lpi, old_can_lpi; + + mutex_lock(&pl->state_mutex); + old_can_lpi = eeecfg_mac_can_tx_lpi(&pl->eee_cfg); + eee_to_eeecfg(eee, &pl->eee_cfg); + can_lpi = eeecfg_mac_can_tx_lpi(&pl->eee_cfg); + + phylink_dbg(pl, "can_lpi %u -> %u\n", old_can_lpi, can_lpi); + + /* If the link is up, and the configuration changes the + * LPI permissive state, deal with the change at the MAC. + */ + if (phylink_link_is_up(pl) && old_can_lpi != can_lpi) { + phylink_dbg(pl, "link is up, lpi changed\n"); + if (can_lpi) + phylink_activate_eee(pl); + else + phylink_deactivate_eee(pl); + } + + mutex_unlock(&pl->state_mutex); + } return ret; } @@ -2912,7 +3282,7 @@ static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, struct phylink_link_state state; int val = 0xffff; - switch (pl->cur_link_an_mode) { + switch (pl->act_link_an_mode) { case MLO_AN_FIXED: if (phy_id == 0) { phylink_get_fixed_state(pl, &state); @@ -2937,7 +3307,7 @@ static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, unsigned int reg, unsigned int val) { - switch (pl->cur_link_an_mode) { + switch (pl->act_link_an_mode) { case MLO_AN_FIXED: break; @@ -3107,10 +3477,11 @@ static phy_interface_t phylink_choose_sfp_interface(struct phylink *pl, return interface; } -static void phylink_sfp_set_config(struct phylink *pl, u8 mode, +static void phylink_sfp_set_config(struct phylink *pl, unsigned long *supported, struct phylink_link_state *state) { + u8 mode = MLO_AN_INBAND; bool changed = false; phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", @@ -3127,9 +3498,9 @@ static void phylink_sfp_set_config(struct phylink *pl, u8 mode, changed = true; } - if (pl->cur_link_an_mode != mode || + if (pl->req_link_an_mode != mode || pl->link_config.interface != state->interface) { - pl->cur_link_an_mode = mode; + pl->req_link_an_mode = mode; pl->link_config.interface = state->interface; changed = true; @@ -3144,13 +3515,10 @@ static void phylink_sfp_set_config(struct phylink *pl, u8 mode, phylink_mac_initial_config(pl, false); } -static int phylink_sfp_config_phy(struct phylink *pl, u8 mode, - struct phy_device *phy) +static int phylink_sfp_config_phy(struct phylink *pl, struct phy_device *phy) { - __ETHTOOL_DECLARE_LINK_MODE_MASK(support1); __ETHTOOL_DECLARE_LINK_MODE_MASK(support); struct phylink_link_state config; - phy_interface_t iface; int ret; linkmode_copy(support, phy->supported); @@ -3171,30 +3539,27 @@ static int phylink_sfp_config_phy(struct phylink *pl, u8 mode, return ret; } - iface = sfp_select_interface(pl->sfp_bus, config.advertising); - if (iface == PHY_INTERFACE_MODE_NA) { - phylink_err(pl, - "selection of interface failed, advertisement %*pb\n", - __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising); + config.interface = phylink_sfp_select_interface(pl, config.advertising); + if (config.interface == PHY_INTERFACE_MODE_NA) return -EINVAL; - } - config.interface = iface; - linkmode_copy(support1, support); - ret = phylink_validate(pl, support1, &config); - if (ret) { - phylink_err(pl, - "validation of %s/%s with support %*pb failed: %pe\n", - phylink_an_mode_str(mode), - phy_modes(config.interface), - __ETHTOOL_LINK_MODE_MASK_NBITS, support, - ERR_PTR(ret)); + /* Attach the PHY so that the PHY is present when we do the major + * configuration step. + */ + ret = phylink_attach_phy(pl, phy, config.interface); + if (ret < 0) + return ret; + + /* This will validate the configuration for us. */ + ret = phylink_bringup_phy(pl, phy, config.interface); + if (ret < 0) { + phy_detach(phy); return ret; } pl->link_port = pl->sfp_port; - phylink_sfp_set_config(pl, mode, support, &config); + phylink_sfp_set_config(pl, support, &config); return 0; } @@ -3250,6 +3615,12 @@ static int phylink_sfp_config_optical(struct phylink *pl) phylink_dbg(pl, "optical SFP: chosen %s interface\n", phy_modes(interface)); + if (!phylink_validate_pcs_inband_autoneg(pl, interface, + config.advertising)) { + phylink_err(pl, "autoneg setting not compatible with PCS"); + return -EINVAL; + } + config.interface = interface; /* Ignore errors if we're expecting a PHY to attach later */ @@ -3263,7 +3634,7 @@ static int phylink_sfp_config_optical(struct phylink *pl) pl->link_port = pl->sfp_port; - phylink_sfp_set_config(pl, MLO_AN_INBAND, pl->sfp_support, &config); + phylink_sfp_set_config(pl, pl->sfp_support, &config); return 0; } @@ -3334,20 +3705,11 @@ static void phylink_sfp_link_up(void *upstream) phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK); } -/* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII - * or 802.3z control word, so inband will not work. - */ -static bool phylink_phy_no_inband(struct phy_device *phy) -{ - return phy->is_c45 && phy_id_compare(phy->c45_ids.device_ids[1], - 0xae025150, 0xfffffff0); -} - static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) { + DECLARE_PHY_INTERFACE_MASK(interfaces); struct phylink *pl = upstream; phy_interface_t interface; - u8 mode; int ret; /* @@ -3359,30 +3721,59 @@ static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) */ phy_support_asym_pause(phy); - if (phylink_phy_no_inband(phy)) - mode = MLO_AN_PHY; - else - mode = MLO_AN_INBAND; - /* Set the PHY's host supported interfaces */ phy_interface_and(phy->host_interfaces, phylink_sfp_interfaces, pl->config->supported_interfaces); - /* Do the initial configuration */ - ret = phylink_sfp_config_phy(pl, mode, phy); - if (ret < 0) - return ret; + if (phy_interface_empty(phy->supported_interfaces)) { + phylink_dbg(pl, "copper SFP: PHY provides empty supported_interfaces\n"); + + /* Do the initial configuration */ + return phylink_sfp_config_phy(pl, phy); + } + + phylink_dbg(pl, "copper SFP: interfaces=[mac=%*pbl, sfp=%*pbl]\n", + (int)PHY_INTERFACE_MODE_MAX, + pl->config->supported_interfaces, + (int)PHY_INTERFACE_MODE_MAX, + phy->supported_interfaces); + + phy_interface_and(interfaces, phy->supported_interfaces, + pl->config->supported_interfaces); + interface = phylink_choose_sfp_interface(pl, interfaces); + if (interface == PHY_INTERFACE_MODE_NA) { + phylink_err(pl, + "selection of interface for PHY failed\n"); + return -EINVAL; + } + + phylink_dbg(pl, "copper SFP: chosen %s interface\n", + phy_modes(interface)); - interface = pl->link_config.interface; ret = phylink_attach_phy(pl, phy, interface); if (ret < 0) return ret; ret = phylink_bringup_phy(pl, phy, interface); - if (ret) + if (ret) { phy_detach(phy); + return ret; + } - return ret; + if (pl->req_link_an_mode != MLO_AN_INBAND || + pl->link_config.interface != interface) { + pl->link_config.interface = interface; + pl->req_link_an_mode = MLO_AN_INBAND; + + phylink_info(pl, "switched to %s/%s link mode\n", + phylink_an_mode_str(pl->req_link_an_mode), + phy_modes(pl->link_config.interface)); + } + + if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) + phylink_mac_initial_config(pl, false); + + return 0; } static void phylink_sfp_disconnect_phy(void *upstream) @@ -3501,12 +3892,18 @@ static void phylink_decode_sgmii_word(struct phylink_link_state *state, * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word * * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation - * code word. Decode the USXGMII code word and populate the corresponding fields - * (speed, duplex) into the phylink_link_state structure. + * code word. Decode the USXGMII code word and populate the corresponding fields + * (speed, duplex) into the phylink_link_state structure. If the code word + * indicates link is down, or we are unable to decode it, set the link down. */ void phylink_decode_usxgmii_word(struct phylink_link_state *state, uint16_t lpa) { + if (!(lpa & MDIO_USXGMII_LINK)) { + state->link = false; + return; + } + switch (lpa & MDIO_USXGMII_SPD_MASK) { case MDIO_USXGMII_10: state->speed = SPEED_10; |