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e1000e: workaround link issues on busy hub in half duplex on 82577/82578

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This patch removes a delay in hardware after every received packet allowing
more time for transmitted packets to go out in between received packets in
half duplex.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bruce Allan 2010-01-13 01:53:08 +00:00 • committed by David S. Miller
parent fddaa1aff8
commit baf86c9d36
1 changed files with 18 additions and 1 deletions
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19
drivers/net/e1000e/ich8lan.c
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@ -1122,6 +1122,7 @@ static s32 e1000_set_mdio_slow_mode_hv(struct e1000_hw *hw)
static s32 e1000_hv_phy_workarounds_ich8lan(struct e1000_hw *hw)
{
s32 ret_val = 0;
u16 phy_data;
if (hw->mac.type != e1000_pchlan)
return ret_val;
@ -1165,16 +1166,32 @@ static s32 e1000_hv_phy_workarounds_ich8lan(struct e1000_hw *hw)
hw->phy.addr = 1;
ret_val = e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, 0);
hw->phy.ops.release(hw);
if (ret_val)
goto out;
hw->phy.ops.release(hw);
/*
* Configure the K1 Si workaround during phy reset assuming there is
* link so that it disables K1 if link is in 1Gbps.
*/
ret_val = e1000_k1_gig_workaround_hv(hw, true);
if (ret_val)
goto out;
/* Workaround for link disconnects on a busy hub in half duplex */
ret_val = hw->phy.ops.acquire(hw);
if (ret_val)
goto out;
ret_val = hw->phy.ops.read_reg_locked(hw,
PHY_REG(BM_PORT_CTRL_PAGE, 17),
&phy_data);
if (ret_val)
goto release;
ret_val = hw->phy.ops.write_reg_locked(hw,
PHY_REG(BM_PORT_CTRL_PAGE, 17),
phy_data & 0x00FF);
release:
hw->phy.ops.release(hw);
out:
return ret_val;
}