diff options
Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_main.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index ed129f1c5c3e..3bc10bd5bbc1 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -1607,6 +1607,73 @@ static void igb_power_down_link(struct igb_adapter *adapter) } /** + * Detect and switch function for Media Auto Sense + * @adapter: address of the board private structure + **/ +static void igb_check_swap_media(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 ctrl_ext, connsw; + bool swap_now = false; + + ctrl_ext = rd32(E1000_CTRL_EXT); + connsw = rd32(E1000_CONNSW); + + /* need to live swap if current media is copper and we have fiber/serdes + * to go to. + */ + + if ((hw->phy.media_type == e1000_media_type_copper) && + (!(connsw & E1000_CONNSW_AUTOSENSE_EN))) { + swap_now = true; + } else if (!(connsw & E1000_CONNSW_SERDESD)) { + /* copper signal takes time to appear */ + if (adapter->copper_tries < 4) { + adapter->copper_tries++; + connsw |= E1000_CONNSW_AUTOSENSE_CONF; + wr32(E1000_CONNSW, connsw); + return; + } else { + adapter->copper_tries = 0; + if ((connsw & E1000_CONNSW_PHYSD) && + (!(connsw & E1000_CONNSW_PHY_PDN))) { + swap_now = true; + connsw &= ~E1000_CONNSW_AUTOSENSE_CONF; + wr32(E1000_CONNSW, connsw); + } + } + } + + if (!swap_now) + return; + + switch (hw->phy.media_type) { + case e1000_media_type_copper: + netdev_info(adapter->netdev, + "MAS: changing media to fiber/serdes\n"); + ctrl_ext |= + E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES; + adapter->flags |= IGB_FLAG_MEDIA_RESET; + adapter->copper_tries = 0; + break; + case e1000_media_type_internal_serdes: + case e1000_media_type_fiber: + netdev_info(adapter->netdev, + "MAS: changing media to copper\n"); + ctrl_ext &= + ~E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES; + adapter->flags |= IGB_FLAG_MEDIA_RESET; + break; + default: + /* shouldn't get here during regular operation */ + netdev_err(adapter->netdev, + "AMS: Invalid media type found, returning\n"); + break; + } + wr32(E1000_CTRL_EXT, ctrl_ext); +} + +/** * igb_up - Open the interface and prepare it to handle traffic * @adapter: board private structure **/ @@ -1719,6 +1786,37 @@ void igb_reinit_locked(struct igb_adapter *adapter) clear_bit(__IGB_RESETTING, &adapter->state); } +/** igb_enable_mas - Media Autosense re-enable after swap + * + * @adapter: adapter struct + **/ +static s32 igb_enable_mas(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 connsw; + s32 ret_val = 0; + + connsw = rd32(E1000_CONNSW); + if (!(hw->phy.media_type == e1000_media_type_copper)) + return ret_val; + + /* configure for SerDes media detect */ + if (!(connsw & E1000_CONNSW_SERDESD)) { + connsw |= E1000_CONNSW_ENRGSRC; + connsw |= E1000_CONNSW_AUTOSENSE_EN; + wr32(E1000_CONNSW, connsw); + wrfl(); + } else if (connsw & E1000_CONNSW_SERDESD) { + /* already SerDes, no need to enable anything */ + return ret_val; + } else { + netdev_info(adapter->netdev, + "MAS: Unable to configure feature, disabling..\n"); + adapter->flags &= ~IGB_FLAG_MAS_ENABLE; + } + return ret_val; +} + void igb_reset(struct igb_adapter *adapter) { struct pci_dev *pdev = adapter->pdev; @@ -1830,6 +1928,16 @@ void igb_reset(struct igb_adapter *adapter) hw->mac.ops.reset_hw(hw); wr32(E1000_WUC, 0); + if (adapter->flags & IGB_FLAG_MEDIA_RESET) { + /* need to resetup here after media swap */ + adapter->ei.get_invariants(hw); + adapter->flags &= ~IGB_FLAG_MEDIA_RESET; + } + if (adapter->flags & IGB_FLAG_MAS_ENABLE) { + if (igb_enable_mas(adapter)) + dev_err(&pdev->dev, + "Error enabling Media Auto Sense\n"); + } if (hw->mac.ops.init_hw(hw)) dev_err(&pdev->dev, "Hardware Error\n"); @@ -1976,6 +2084,58 @@ void igb_set_fw_version(struct igb_adapter *adapter) } /** + * igb_init_mas - init Media Autosense feature if enabled in the NVM + * + * @adapter: adapter struct + **/ +static void igb_init_mas(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u16 eeprom_data; + + hw->nvm.ops.read(hw, NVM_COMPAT, 1, &eeprom_data); + switch (hw->bus.func) { + case E1000_FUNC_0: + if (eeprom_data & IGB_MAS_ENABLE_0) { + adapter->flags |= IGB_FLAG_MAS_ENABLE; + netdev_info(adapter->netdev, + "MAS: Enabling Media Autosense for port %d\n", + hw->bus.func); + } + break; + case E1000_FUNC_1: + if (eeprom_data & IGB_MAS_ENABLE_1) { + adapter->flags |= IGB_FLAG_MAS_ENABLE; + netdev_info(adapter->netdev, + "MAS: Enabling Media Autosense for port %d\n", + hw->bus.func); + } + break; + case E1000_FUNC_2: + if (eeprom_data & IGB_MAS_ENABLE_2) { + adapter->flags |= IGB_FLAG_MAS_ENABLE; + netdev_info(adapter->netdev, + "MAS: Enabling Media Autosense for port %d\n", + hw->bus.func); + } + break; + case E1000_FUNC_3: + if (eeprom_data & IGB_MAS_ENABLE_3) { + adapter->flags |= IGB_FLAG_MAS_ENABLE; + netdev_info(adapter->netdev, + "MAS: Enabling Media Autosense for port %d\n", + hw->bus.func); + } + break; + default: + /* Shouldn't get here */ + netdev_err(adapter->netdev, + "MAS: Invalid port configuration, returning\n"); + break; + } +} + +/** * igb_init_i2c - Init I2C interface * @adapter: pointer to adapter structure **/ @@ -2346,6 +2506,11 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) adapter->ets = false; } #endif + /* Check if Media Autosense is enabled */ + adapter->ei = *ei; + if (hw->dev_spec._82575.mas_capable) + igb_init_mas(adapter); + /* do hw tstamp init after resetting */ igb_ptp_init(adapter); @@ -3931,6 +4096,7 @@ static void igb_watchdog_task(struct work_struct *work) struct net_device *netdev = adapter->netdev; u32 link; int i; + u32 connsw; link = igb_has_link(adapter); @@ -3941,6 +4107,14 @@ static void igb_watchdog_task(struct work_struct *work) link = false; } + /* Force link down if we have fiber to swap to */ + if (adapter->flags & IGB_FLAG_MAS_ENABLE) { + if (hw->phy.media_type == e1000_media_type_copper) { + connsw = rd32(E1000_CONNSW); + if (!(connsw & E1000_CONNSW_AUTOSENSE_EN)) + link = 0; + } + } if (link) { /* Perform a reset if the media type changed. */ if (hw->dev_spec._82575.media_changed) { @@ -4028,8 +4202,27 @@ static void igb_watchdog_task(struct work_struct *work) mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ)); + /* link is down, time to check for alternate media */ + if (adapter->flags & IGB_FLAG_MAS_ENABLE) { + igb_check_swap_media(adapter); + if (adapter->flags & IGB_FLAG_MEDIA_RESET) { + schedule_work(&adapter->reset_task); + /* return immediately */ + return; + } + } pm_schedule_suspend(netdev->dev.parent, MSEC_PER_SEC * 5); + + /* also check for alternate media here */ + } else if (!netif_carrier_ok(netdev) && + (adapter->flags & IGB_FLAG_MAS_ENABLE)) { + igb_check_swap_media(adapter); + if (adapter->flags & IGB_FLAG_MEDIA_RESET) { + schedule_work(&adapter->reset_task); + /* return immediately */ + return; + } } } |