igb: Power down link when interface is down
This changes the behavior of the driver to power down the link
when the associated interface is down, unless management is enabled.
Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/igb/e1000_82575.c b/drivers/net/igb/e1000_82575.c
index 59817bc..9d7fa2f 100644
--- a/drivers/net/igb/e1000_82575.c
+++ b/drivers/net/igb/e1000_82575.c
@@ -727,6 +727,34 @@
}
/**
+ * igb_power_up_serdes_link_82575 - Power up the serdes link after shutdown
+ * @hw: pointer to the HW structure
+ **/
+void igb_power_up_serdes_link_82575(struct e1000_hw *hw)
+{
+ u32 reg;
+
+
+ if ((hw->phy.media_type != e1000_media_type_internal_serdes) &&
+ !igb_sgmii_active_82575(hw))
+ return;
+
+ /* Enable PCS to turn on link */
+ reg = rd32(E1000_PCS_CFG0);
+ reg |= E1000_PCS_CFG_PCS_EN;
+ wr32(E1000_PCS_CFG0, reg);
+
+ /* Power up the laser */
+ reg = rd32(E1000_CTRL_EXT);
+ reg &= ~E1000_CTRL_EXT_SDP3_DATA;
+ wr32(E1000_CTRL_EXT, reg);
+
+ /* flush the write to verify completion */
+ wrfl();
+ msleep(1);
+}
+
+/**
* igb_get_pcs_speed_and_duplex_82575 - Retrieve current speed/duplex
* @hw: pointer to the HW structure
* @speed: stores the current speed
@@ -1166,6 +1194,22 @@
}
/**
+ * igb_power_down_phy_copper_82575 - Remove link during PHY power down
+ * @hw: pointer to the HW structure
+ *
+ * In the case of a PHY power down to save power, or to turn off link during a
+ * driver unload, or wake on lan is not enabled, remove the link.
+ **/
+void igb_power_down_phy_copper_82575(struct e1000_hw *hw)
+{
+ /* If the management interface is not enabled, then power down */
+ if (!(igb_enable_mng_pass_thru(hw) || igb_check_reset_block(hw)))
+ igb_power_down_phy_copper(hw);
+
+ return;
+}
+
+/**
* igb_clear_hw_cntrs_82575 - Clear device specific hardware counters
* @hw: pointer to the HW structure
*