From 4d6b725e4d8e499fad012a25381c8d9bf53fbf4b Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Fri, 6 Feb 2009 23:16:24 +0000 Subject: [PATCH] igb: add link check function Add a link check function to contain all activities related to verifying that the link is present. The current approach is a bit cludgy and needs to be cleaned up. Signed-off-by: Alexander Duyck Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/igb/igb_main.c | 59 +++++++++++++++++++++++++++----------- 1 file changed, 42 insertions(+), 17 deletions(-) diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index 13b10ba8a3c4..b59088eace1d 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -2260,6 +2260,46 @@ static void igb_update_phy_info(unsigned long data) igb_get_phy_info(&adapter->hw); } +/** + * igb_has_link - check shared code for link and determine up/down + * @adapter: pointer to driver private info + **/ +static bool igb_has_link(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + bool link_active = false; + s32 ret_val = 0; + + /* get_link_status is set on LSC (link status) interrupt or + * rx sequence error interrupt. get_link_status will stay + * false until the e1000_check_for_link establishes link + * for copper adapters ONLY + */ + switch (hw->phy.media_type) { + case e1000_media_type_copper: + if (hw->mac.get_link_status) { + ret_val = hw->mac.ops.check_for_link(hw); + link_active = !hw->mac.get_link_status; + } else { + link_active = true; + } + break; + case e1000_media_type_fiber: + ret_val = hw->mac.ops.check_for_link(hw); + link_active = !!(rd32(E1000_STATUS) & E1000_STATUS_LU); + break; + case e1000_media_type_internal_serdes: + ret_val = hw->mac.ops.check_for_link(hw); + link_active = hw->mac.serdes_has_link; + break; + default: + case e1000_media_type_unknown: + break; + } + + return link_active; +} + /** * igb_watchdog - Timer Call-back * @data: pointer to adapter cast into an unsigned long @@ -2285,25 +2325,10 @@ static void igb_watchdog_task(struct work_struct *work) s32 ret_val; int i; - if ((netif_carrier_ok(netdev)) && - (rd32(E1000_STATUS) & E1000_STATUS_LU)) + link = igb_has_link(adapter); + if ((netif_carrier_ok(netdev)) && link) goto link_up; - ret_val = hw->mac.ops.check_for_link(&adapter->hw); - if ((ret_val == E1000_ERR_PHY) && - (hw->phy.type == e1000_phy_igp_3) && - (rd32(E1000_CTRL) & - E1000_PHY_CTRL_GBE_DISABLE)) - dev_info(&adapter->pdev->dev, - "Gigabit has been disabled, downgrading speed\n"); - - if ((hw->phy.media_type == e1000_media_type_internal_serdes) && - !(rd32(E1000_TXCW) & E1000_TXCW_ANE)) - link = mac->serdes_has_link; - else - link = rd32(E1000_STATUS) & - E1000_STATUS_LU; - if (link) { if (!netif_carrier_ok(netdev)) { u32 ctrl;