diff options
| -rw-r--r-- | drivers/net/tg3.c | 107 |
1 files changed, 64 insertions, 43 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index cdade05bdd07..b2f505d6ea94 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -1694,7 +1694,8 @@ static void tg3_setup_flow_control(struct tg3 *tp, u32 local_adv, u32 remote_adv u32 old_rx_mode = tp->rx_mode; u32 old_tx_mode = tp->tx_mode; - if (tp->tg3_flags & TG3_FLAG_PAUSE_AUTONEG) { + if (tp->link_config.autoneg == AUTONEG_ENABLE && + (tp->tg3_flags & TG3_FLAG_PAUSE_AUTONEG)) { if (tp->tg3_flags2 & TG3_FLG2_ANY_SERDES) new_tg3_flags = tg3_resolve_flowctrl_1000X(local_adv, remote_adv); @@ -1975,10 +1976,44 @@ static int tg3_copper_is_advertising_all(struct tg3 *tp, u32 mask) return 1; } +static int tg3_adv_1000T_flowctrl_ok(struct tg3 *tp, u32 *lcladv, u32 *rmtadv) +{ + u32 curadv, reqadv; + + if (tg3_readphy(tp, MII_ADVERTISE, lcladv)) + return 1; + + curadv = *lcladv & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM); + reqadv = tg3_advert_flowctrl_1000T(tp->link_config.flowctrl); + + if (tp->link_config.active_duplex == DUPLEX_FULL) { + if (curadv != reqadv) + return 0; + + if (tp->tg3_flags & TG3_FLAG_PAUSE_AUTONEG) + tg3_readphy(tp, MII_LPA, rmtadv); + } else { + /* Reprogram the advertisement register, even if it + * does not affect the current link. If the link + * gets renegotiated in the future, we can save an + * additional renegotiation cycle by advertising + * it correctly in the first place. + */ + if (curadv != reqadv) { + *lcladv &= ~(ADVERTISE_PAUSE_CAP | + ADVERTISE_PAUSE_ASYM); + tg3_writephy(tp, MII_ADVERTISE, *lcladv | reqadv); + } + } + + return 1; +} + static int tg3_setup_copper_phy(struct tg3 *tp, int force_reset) { int current_link_up; u32 bmsr, dummy; + u32 lcl_adv, rmt_adv; u16 current_speed; u8 current_duplex; int i, err; @@ -2121,54 +2156,35 @@ static int tg3_setup_copper_phy(struct tg3 *tp, int force_reset) udelay(10); } - if (tp->link_config.autoneg == AUTONEG_ENABLE) { - if (bmcr & BMCR_ANENABLE) { - current_link_up = 1; + lcl_adv = 0; + rmt_adv = 0; - /* Force autoneg restart if we are exiting - * low power mode. - */ - if (!tg3_copper_is_advertising_all(tp, - tp->link_config.advertising)) - current_link_up = 0; - } else { - current_link_up = 0; + tp->link_config.active_speed = current_speed; + tp->link_config.active_duplex = current_duplex; + + if (tp->link_config.autoneg == AUTONEG_ENABLE) { + if ((bmcr & BMCR_ANENABLE) && + tg3_copper_is_advertising_all(tp, + tp->link_config.advertising)) { + if (tg3_adv_1000T_flowctrl_ok(tp, &lcl_adv, + &rmt_adv)) + current_link_up = 1; } } else { if (!(bmcr & BMCR_ANENABLE) && tp->link_config.speed == current_speed && - tp->link_config.duplex == current_duplex) { + tp->link_config.duplex == current_duplex && + tp->link_config.flowctrl == + tp->link_config.active_flowctrl) { current_link_up = 1; - } else { - current_link_up = 0; } } - tp->link_config.active_speed = current_speed; - tp->link_config.active_duplex = current_duplex; + if (current_link_up == 1 && + tp->link_config.active_duplex == DUPLEX_FULL) + tg3_setup_flow_control(tp, lcl_adv, rmt_adv); } - if (current_link_up == 1 && - (tp->link_config.active_duplex == DUPLEX_FULL) && - (tp->link_config.autoneg == AUTONEG_ENABLE)) { - u32 local_adv, remote_adv; - - if (tg3_readphy(tp, MII_ADVERTISE, &local_adv)) - local_adv = 0; - - if (tg3_readphy(tp, MII_LPA, &remote_adv)) - remote_adv = 0; - - /* If we are not advertising what has been requested, - * bring the link down and reconfigure. - */ - if (local_adv != - tg3_advert_flowctrl_1000T(tp->link_config.flowctrl)) { - current_link_up = 0; - } else { - tg3_setup_flow_control(tp, local_adv, remote_adv); - } - } relink: if (current_link_up == 0 || tp->link_config.phy_is_low_power) { u32 tmp; @@ -2981,6 +2997,7 @@ static int tg3_setup_fiber_mii_phy(struct tg3 *tp, int force_reset) u32 bmsr, bmcr; u16 current_speed; u8 current_duplex; + u32 local_adv, remote_adv; tp->mac_mode |= MAC_MODE_PORT_MODE_GMII; tw32_f(MAC_MODE, tp->mac_mode); @@ -3014,7 +3031,8 @@ static int tg3_setup_fiber_mii_phy(struct tg3 *tp, int force_reset) err |= tg3_readphy(tp, MII_BMCR, &bmcr); if ((tp->link_config.autoneg == AUTONEG_ENABLE) && !force_reset && - (tp->tg3_flags2 & TG3_FLG2_PARALLEL_DETECT)) { + (tp->tg3_flags2 & TG3_FLG2_PARALLEL_DETECT) && + tp->link_config.flowctrl == tp->link_config.active_flowctrl) { /* do nothing, just check for link up at the end */ } else if (tp->link_config.autoneg == AUTONEG_ENABLE) { u32 adv, new_adv; @@ -3096,8 +3114,11 @@ static int tg3_setup_fiber_mii_phy(struct tg3 *tp, int force_reset) else current_duplex = DUPLEX_HALF; + local_adv = 0; + remote_adv = 0; + if (bmcr & BMCR_ANENABLE) { - u32 local_adv, remote_adv, common; + u32 common; err |= tg3_readphy(tp, MII_ADVERTISE, &local_adv); err |= tg3_readphy(tp, MII_LPA, &remote_adv); @@ -3108,15 +3129,15 @@ static int tg3_setup_fiber_mii_phy(struct tg3 *tp, int force_reset) current_duplex = DUPLEX_FULL; else current_duplex = DUPLEX_HALF; - - tg3_setup_flow_control(tp, local_adv, - remote_adv); } else current_link_up = 0; } } + if (current_link_up == 1 && current_duplex == DUPLEX_FULL) + tg3_setup_flow_control(tp, local_adv, remote_adv); + tp->mac_mode &= ~MAC_MODE_HALF_DUPLEX; if (tp->link_config.active_duplex == DUPLEX_HALF) tp->mac_mode |= MAC_MODE_HALF_DUPLEX; |