From bb436b20fe0ea4231a233aae7f0f7de3a3f2f5c3 Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Fri, 20 Nov 2009 23:24:11 +0000 Subject: [PATCH] e1000e: disable K1 on PCH LOM when in PHY loopback mode When performing the ethtool PHY loopback test on PCH-based LOMs (82577 and 82578), disable K1 (a MAC-PHY interconnect low power mode) otherwise packets might get corrupted. Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/e1000.h | 1 + drivers/net/e1000e/ethtool.c | 4 ++++ drivers/net/e1000e/ich8lan.c | 3 +-- 3 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h index 00989c5534c..a6c68039e8d 100644 --- a/drivers/net/e1000e/e1000.h +++ b/drivers/net/e1000e/e1000.h @@ -485,6 +485,7 @@ extern void e1000e_set_kmrn_lock_loss_workaround_ich8lan(struct e1000_hw *hw, extern void e1000e_igp3_phy_powerdown_workaround_ich8lan(struct e1000_hw *hw); extern void e1000e_gig_downshift_workaround_ich8lan(struct e1000_hw *hw); extern void e1000e_disable_gig_wol_ich8lan(struct e1000_hw *hw); +extern s32 e1000_configure_k1_ich8lan(struct e1000_hw *hw, bool k1_enable); extern s32 e1000e_check_for_copper_link(struct e1000_hw *hw); extern s32 e1000e_check_for_fiber_link(struct e1000_hw *hw); diff --git a/drivers/net/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c index 67e06fd9fc4..fd7921482d2 100644 --- a/drivers/net/e1000e/ethtool.c +++ b/drivers/net/e1000e/ethtool.c @@ -1260,6 +1260,10 @@ static int e1000_integrated_phy_loopback(struct e1000_adapter *adapter) hw->mac.autoneg = 0; + /* Workaround: K1 must be disabled for stable 1Gbps operation */ + if (hw->mac.type == e1000_pchlan) + e1000_configure_k1_ich8lan(hw, false); + if (hw->phy.type == e1000_phy_m88) { /* Auto-MDI/MDIX Off */ e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, 0x0808); diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c index 51ddb04ab19..bd9002e72cb 100644 --- a/drivers/net/e1000e/ich8lan.c +++ b/drivers/net/e1000e/ich8lan.c @@ -224,7 +224,6 @@ static s32 e1000_led_off_pchlan(struct e1000_hw *hw); static s32 e1000_set_lplu_state_pchlan(struct e1000_hw *hw, bool active); static void e1000_lan_init_done_ich8lan(struct e1000_hw *hw); static s32 e1000_k1_gig_workaround_hv(struct e1000_hw *hw, bool link); -static s32 e1000_configure_k1_ich8lan(struct e1000_hw *hw, bool k1_enable); static inline u16 __er16flash(struct e1000_hw *hw, unsigned long reg) { @@ -1023,7 +1022,7 @@ out: * * Success returns 0, Failure returns -E1000_ERR_PHY (-2) **/ -static s32 e1000_configure_k1_ich8lan(struct e1000_hw *hw, bool k1_enable) +s32 e1000_configure_k1_ich8lan(struct e1000_hw *hw, bool k1_enable) { s32 ret_val = 0; u32 ctrl_reg = 0; -- 2.46.0