4 files changed, 70 insertions, 1 deletions

diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index 0e59f15be110..c233496b1f47 100644
--- a/drivers/net/e1000e/e1000.h
+++ b/drivers/net/e1000e/e1000.h
@@ -423,6 +423,7 @@ struct e1000_info {
 #define FLAG2_IS_DISCARDING               (1 << 2)
 #define FLAG2_DISABLE_ASPM_L1             (1 << 3)
 #define FLAG2_HAS_PHY_STATS               (1 << 4)
+#define FLAG2_HAS_EEE                     (1 << 5)
 
 #define E1000_RX_DESC_PS(R, i)      \
         (&(((union e1000_rx_desc_packet_split *)((R).desc))[i]))
diff --git a/drivers/net/e1000e/hw.h b/drivers/net/e1000e/hw.h
index 96116ce5e5cc..eecb2eca507b 100644
--- a/drivers/net/e1000e/hw.h
+++ b/drivers/net/e1000e/hw.h
@@ -937,6 +937,7 @@ struct e1000_dev_spec_ich8lan {
         bool kmrn_lock_loss_workaround_enabled;
         struct e1000_shadow_ram shadow_ram[E1000_ICH8_SHADOW_RAM_WORDS];
         bool nvm_k1_enabled;
+        bool eee_disable;
 };
 
 struct e1000_hw {
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index 8274499b7df6..5e55de002487 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -131,6 +131,10 @@
 /* PHY Power Management Control */
 #define HV_PM_CTRL              PHY_REG(770, 17)
 
+/* PHY Low Power Idle Control */
+#define I82579_LPI_CTRL                 PHY_REG(772, 20)
+#define I82579_LPI_CTRL_ENABLE_MASK     0x6000
+
 /* Strapping Option Register - RO */
 #define E1000_STRAP                     0x0000C
 #define E1000_STRAP_SMBUS_ADDRESS_MASK  0x00FE0000
@@ -569,6 +573,35 @@ static s32 e1000_init_mac_params_ich8lan(struct e1000_adapter *adapter)
 }
 
 /**
+ *  e1000_set_eee_pchlan - Enable/disable EEE support
+ *  @hw: pointer to the HW structure
+ *
+ *  Enable/disable EEE based on setting in dev_spec structure.  The bits in
+ *  the LPI Control register will remain set only if/when link is up.
+ **/
+static s32 e1000_set_eee_pchlan(struct e1000_hw *hw)
+{
+        s32 ret_val = 0;
+        u16 phy_reg;
+
+        if (hw->phy.type != e1000_phy_82579)
+                goto out;
+
+        ret_val = e1e_rphy(hw, I82579_LPI_CTRL, &phy_reg);
+        if (ret_val)
+                goto out;
+
+        if (hw->dev_spec.ich8lan.eee_disable)
+                phy_reg &= ~I82579_LPI_CTRL_ENABLE_MASK;
+        else
+                phy_reg |= I82579_LPI_CTRL_ENABLE_MASK;
+
+        ret_val = e1e_wphy(hw, I82579_LPI_CTRL, phy_reg);
+out:
+        return ret_val;
+}
+
+/**
  *  e1000_check_for_copper_link_ich8lan - Check for link (Copper)
  *  @hw: pointer to the HW structure
  *
@@ -625,6 +658,11 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
          */
         e1000e_check_downshift(hw);
 
+        /* Enable/Disable EEE after link up */
+        ret_val = e1000_set_eee_pchlan(hw);
+        if (ret_val)
+                goto out;
+
         /*
          * If we are forcing speed/duplex, then we simply return since
          * we have already determined whether we have link or not.
@@ -3820,7 +3858,8 @@ struct e1000_info e1000_pch2_info = {
                                   | FLAG_HAS_FLASH
                                   | FLAG_HAS_JUMBO_FRAMES
                                   | FLAG_APME_IN_WUC,
-        .flags2                 = FLAG2_HAS_PHY_STATS,
+        .flags2                 = FLAG2_HAS_PHY_STATS
+                                  | FLAG2_HAS_EEE,
         .pba                    = 18,
         .max_hw_frame_size      = DEFAULT_JUMBO,
         .get_variants           = e1000_get_variants_ich8lan,
diff --git a/drivers/net/e1000e/param.c b/drivers/net/e1000e/param.c
index a150e48a117f..a74846097afd 100644
--- a/drivers/net/e1000e/param.c
+++ b/drivers/net/e1000e/param.c
@@ -161,6 +161,15 @@ E1000_PARAM(WriteProtectNVM, "Write-protect NVM [WARNING: disabling this can lea
 E1000_PARAM(CrcStripping, "Enable CRC Stripping, disable if your BMC needs " \
                           "the CRC");
 
+/*
+ * Enable/disable EEE (a.k.a. IEEE802.3az)
+ *
+ * Valid Range: 0, 1
+ *
+ * Default Value: 1
+ */
+E1000_PARAM(EEE, "Enable/disable on parts that support the feature");
+
 struct e1000_option {
         enum { enable_option, range_option, list_option } type;
         const char *name;
@@ -477,4 +486,23 @@ void __devinit e1000e_check_options(struct e1000_adapter *adapter)
                         }
                 }
         }
+        { /* EEE for parts supporting the feature */
+                static const struct e1000_option opt = {
+                        .type = enable_option,
+                        .name = "EEE Support",
+                        .err  = "defaulting to Enabled",
+                        .def  = OPTION_ENABLED
+                };
+
+                if (adapter->flags2 & FLAG2_HAS_EEE) {
+                        /* Currently only supported on 82579 */
+                        if (num_EEE > bd) {
+                                unsigned int eee = EEE[bd];
+                                e1000_validate_option(&eee, &opt, adapter);
+                                hw->dev_spec.ich8lan.eee_disable = !eee;
+                        } else {
+                                hw->dev_spec.ich8lan.eee_disable = !opt.def;
+                        }
+                }
+        }
 }